Add RFC 3779 support.
authorBen Laurie <ben@openssl.org>
Mon, 27 Nov 2006 14:18:05 +0000 (14:18 +0000)
committerBen Laurie <ben@openssl.org>
Mon, 27 Nov 2006 14:18:05 +0000 (14:18 +0000)
18 files changed:
CHANGES
Configure
apps/ca.c
crypto/asn1/x_x509.c
crypto/stack/safestack.h
crypto/x509/x509.h
crypto/x509/x509_txt.c
crypto/x509/x509_vfy.c
crypto/x509/x509_vfy.h
crypto/x509v3/Makefile
crypto/x509v3/ext_dat.h
crypto/x509v3/pcy_tree.c
crypto/x509v3/v3_addr.c [new file with mode: 0644]
crypto/x509v3/v3_asid.c [new file with mode: 0644]
crypto/x509v3/v3_purp.c
crypto/x509v3/v3_utl.c
crypto/x509v3/v3err.c
crypto/x509v3/x509v3.h

diff --git a/CHANGES b/CHANGES
index c73798f..682a4f0 100644 (file)
--- a/CHANGES
+++ b/CHANGES
 
  Changes between 0.9.8d and 0.9.8e  [XX xxx XXXX]
 
+  *) Add RFC 3779 support.
+     [Rob Austein for ARIN, Ben Laurie]
+
  Changes between 0.9.8c and 0.9.8d  [28 Sep 2006]
 
   *) Introduce limits to prevent malicious keys being able to
index 2eba60d..6eb7f96 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -579,6 +579,7 @@ my $threads=0;
 my $no_shared=0; # but "no-shared" is default
 my $zlib=1;      # but "no-zlib" is default
 my $no_krb5=0;   # but "no-krb5" is implied unless "--with-krb5-..." is used
+my $rfc3779=1;  # but "no-rfc3779" is default
 my $no_asm=0;
 my $no_dso=0;
 my $no_gmp=0;
@@ -614,6 +615,7 @@ my %disabled = ( # "what"         => "comment"
                 "gmp"            => "default",
                  "mdc2"           => "default",
                  "rc5"            => "default",
+                "rfc3779"        => "default",
                  "shared"         => "default",
                  "zlib"           => "default",
                  "zlib-dynamic"   => "default"
@@ -901,6 +903,8 @@ foreach (sort (keys %disabled))
                { $symlink = 0; }
        elsif (/^sse2$/)
                { $no_sse2 = 1; }
+       elsif (/^rfc3779$/)
+               { $rfc3779 = 0; }
        else
                {
                my ($ALGO, $algo);
@@ -1137,6 +1141,11 @@ if ($zlib)
                }
        }
 
+if ($rfc3779)
+       {
+       $openssl_other_defines.="#define OPENSSL_RFC3779\n";
+       }
+
 # You will find shlib_mark1 and shlib_mark2 explained in Makefile.org
 my $shared_mark = "";
 if ($shared_target eq "")
index d0fa3d7..7666e35 100644 (file)
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -1525,6 +1525,7 @@ err:
        if (x509) X509_free(x509);
        X509_CRL_free(crl);
        NCONF_free(conf);
+       NCONF_free(extconf);
        OBJ_cleanup();
        apps_shutdown();
        OPENSSL_EXIT(ret);
index 73f61e1..b6110d2 100644 (file)
@@ -95,6 +95,10 @@ static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                ret->ex_pathlen = -1;
                ret->skid = NULL;
                ret->akid = NULL;
+#ifdef OPENSSL_RFC3779
+               ret->rfc3779_addr = NULL;
+               ret->rfc3779_asid = NULL;
+#endif
                ret->aux = NULL;
                ret->crldp = NULL;
                CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
@@ -112,6 +116,10 @@ static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                AUTHORITY_KEYID_free(ret->akid);
                CRL_DIST_POINTS_free(ret->crldp);
                policy_cache_free(ret->policy_cache);
+#ifdef OPENSSL_RFC3779
+               sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
+               ASIdentifiers_free(ret->rfc3779_asid);
+#endif
 
                if (ret->name != NULL) OPENSSL_free(ret->name);
                break;
index 2d3a2e9..575745e 100644 (file)
@@ -297,6 +297,30 @@ STACK_OF(type) \
 #define sk_ACCESS_DESCRIPTION_sort(st) SKM_sk_sort(ACCESS_DESCRIPTION, (st))
 #define sk_ACCESS_DESCRIPTION_is_sorted(st) SKM_sk_is_sorted(ACCESS_DESCRIPTION, (st))
 
+#ifdef OPENSSL_RFC3779
+#define sk_ASIdOrRange_new(st) SKM_sk_new(ASIdOrRange, (st))
+#define sk_ASIdOrRange_new_null() SKM_sk_new_null(ASIdOrRange)
+#define sk_ASIdOrRange_free(st) SKM_sk_free(ASIdOrRange, (st))
+#define sk_ASIdOrRange_num(st) SKM_sk_num(ASIdOrRange, (st))
+#define sk_ASIdOrRange_value(st, i) SKM_sk_value(ASIdOrRange, (st), (i))
+#define sk_ASIdOrRange_set(st, i, val) SKM_sk_set(ASIdOrRange, (st), (i), (val))
+#define sk_ASIdOrRange_zero(st) SKM_sk_zero(ASIdOrRange, (st))
+#define sk_ASIdOrRange_push(st, val) SKM_sk_push(ASIdOrRange, (st), (val))
+#define sk_ASIdOrRange_unshift(st, val) SKM_sk_unshift(ASIdOrRange, (st), (val))
+#define sk_ASIdOrRange_find(st, val) SKM_sk_find(ASIdOrRange, (st), (val))
+#define sk_ASIdOrRange_find_ex(st, val) SKM_sk_find_ex(ASIdOrRange, (st), (val))
+#define sk_ASIdOrRange_delete(st, i) SKM_sk_delete(ASIdOrRange, (st), (i))
+#define sk_ASIdOrRange_delete_ptr(st, ptr) SKM_sk_delete_ptr(ASIdOrRange, (st), (ptr))
+#define sk_ASIdOrRange_insert(st, val, i) SKM_sk_insert(ASIdOrRange, (st), (val), (i))
+#define sk_ASIdOrRange_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(ASIdOrRange, (st), (cmp))
+#define sk_ASIdOrRange_dup(st) SKM_sk_dup(ASIdOrRange, st)
+#define sk_ASIdOrRange_pop_free(st, free_func) SKM_sk_pop_free(ASIdOrRange, (st), (free_func))
+#define sk_ASIdOrRange_shift(st) SKM_sk_shift(ASIdOrRange, (st))
+#define sk_ASIdOrRange_pop(st) SKM_sk_pop(ASIdOrRange, (st))
+#define sk_ASIdOrRange_sort(st) SKM_sk_sort(ASIdOrRange, (st))
+#define sk_ASIdOrRange_is_sorted(st) SKM_sk_is_sorted(ASIdOrRange, (st))
+#endif /* def OPENSSL_RFC3779 */
+
 #define sk_ASN1_GENERALSTRING_new(st) SKM_sk_new(ASN1_GENERALSTRING, (st))
 #define sk_ASN1_GENERALSTRING_new_null() SKM_sk_new_null(ASN1_GENERALSTRING)
 #define sk_ASN1_GENERALSTRING_free(st) SKM_sk_free(ASN1_GENERALSTRING, (st))
@@ -781,6 +805,52 @@ STACK_OF(type) \
 #define sk_GENERAL_SUBTREE_sort(st) SKM_sk_sort(GENERAL_SUBTREE, (st))
 #define sk_GENERAL_SUBTREE_is_sorted(st) SKM_sk_is_sorted(GENERAL_SUBTREE, (st))
 
+#ifdef OPENSSL_RFC3779
+#define sk_IPAddressFamily_new(st) SKM_sk_new(IPAddressFamily, (st))
+#define sk_IPAddressFamily_new_null() SKM_sk_new_null(IPAddressFamily)
+#define sk_IPAddressFamily_free(st) SKM_sk_free(IPAddressFamily, (st))
+#define sk_IPAddressFamily_num(st) SKM_sk_num(IPAddressFamily, (st))
+#define sk_IPAddressFamily_value(st, i) SKM_sk_value(IPAddressFamily, (st), (i))
+#define sk_IPAddressFamily_set(st, i, val) SKM_sk_set(IPAddressFamily, (st), (i), (val))
+#define sk_IPAddressFamily_zero(st) SKM_sk_zero(IPAddressFamily, (st))
+#define sk_IPAddressFamily_push(st, val) SKM_sk_push(IPAddressFamily, (st), (val))
+#define sk_IPAddressFamily_unshift(st, val) SKM_sk_unshift(IPAddressFamily, (st), (val))
+#define sk_IPAddressFamily_find(st, val) SKM_sk_find(IPAddressFamily, (st), (val))
+#define sk_IPAddressFamily_find_ex(st, val) SKM_sk_find_ex(IPAddressFamily, (st), (val))
+#define sk_IPAddressFamily_delete(st, i) SKM_sk_delete(IPAddressFamily, (st), (i))
+#define sk_IPAddressFamily_delete_ptr(st, ptr) SKM_sk_delete_ptr(IPAddressFamily, (st), (ptr))
+#define sk_IPAddressFamily_insert(st, val, i) SKM_sk_insert(IPAddressFamily, (st), (val), (i))
+#define sk_IPAddressFamily_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(IPAddressFamily, (st), (cmp))
+#define sk_IPAddressFamily_dup(st) SKM_sk_dup(IPAddressFamily, st)
+#define sk_IPAddressFamily_pop_free(st, free_func) SKM_sk_pop_free(IPAddressFamily, (st), (free_func))
+#define sk_IPAddressFamily_shift(st) SKM_sk_shift(IPAddressFamily, (st))
+#define sk_IPAddressFamily_pop(st) SKM_sk_pop(IPAddressFamily, (st))
+#define sk_IPAddressFamily_sort(st) SKM_sk_sort(IPAddressFamily, (st))
+#define sk_IPAddressFamily_is_sorted(st) SKM_sk_is_sorted(IPAddressFamily, (st))
+
+#define sk_IPAddressOrRange_new(st) SKM_sk_new(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_new_null() SKM_sk_new_null(IPAddressOrRange)
+#define sk_IPAddressOrRange_free(st) SKM_sk_free(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_num(st) SKM_sk_num(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_value(st, i) SKM_sk_value(IPAddressOrRange, (st), (i))
+#define sk_IPAddressOrRange_set(st, i, val) SKM_sk_set(IPAddressOrRange, (st), (i), (val))
+#define sk_IPAddressOrRange_zero(st) SKM_sk_zero(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_push(st, val) SKM_sk_push(IPAddressOrRange, (st), (val))
+#define sk_IPAddressOrRange_unshift(st, val) SKM_sk_unshift(IPAddressOrRange, (st), (val))
+#define sk_IPAddressOrRange_find(st, val) SKM_sk_find(IPAddressOrRange, (st), (val))
+#define sk_IPAddressOrRange_find_ex(st, val) SKM_sk_find_ex(IPAddressOrRange, (st), (val))
+#define sk_IPAddressOrRange_delete(st, i) SKM_sk_delete(IPAddressOrRange, (st), (i))
+#define sk_IPAddressOrRange_delete_ptr(st, ptr) SKM_sk_delete_ptr(IPAddressOrRange, (st), (ptr))
+#define sk_IPAddressOrRange_insert(st, val, i) SKM_sk_insert(IPAddressOrRange, (st), (val), (i))
+#define sk_IPAddressOrRange_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(IPAddressOrRange, (st), (cmp))
+#define sk_IPAddressOrRange_dup(st) SKM_sk_dup(IPAddressOrRange, st)
+#define sk_IPAddressOrRange_pop_free(st, free_func) SKM_sk_pop_free(IPAddressOrRange, (st), (free_func))
+#define sk_IPAddressOrRange_shift(st) SKM_sk_shift(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_pop(st) SKM_sk_pop(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_sort(st) SKM_sk_sort(IPAddressOrRange, (st))
+#define sk_IPAddressOrRange_is_sorted(st) SKM_sk_is_sorted(IPAddressOrRange, (st))
+#endif /* def OPENSSL_RFC3779 */
+
 #define sk_KRB5_APREQBODY_new(st) SKM_sk_new(KRB5_APREQBODY, (st))
 #define sk_KRB5_APREQBODY_new_null() SKM_sk_new_null(KRB5_APREQBODY)
 #define sk_KRB5_APREQBODY_free(st) SKM_sk_free(KRB5_APREQBODY, (st))
index 40d9401..b70a008 100644 (file)
@@ -291,6 +291,10 @@ struct x509_st
        AUTHORITY_KEYID *akid;
        X509_POLICY_CACHE *policy_cache;
        STACK_OF(DIST_POINT) *crldp;
+#ifdef OPENSSL_RFC3779
+       STACK_OF(IPAddressFamily) *rfc3779_addr;
+       struct ASIdentifiers_st *rfc3779_asid;
+#endif
 #ifndef OPENSSL_NO_SHA
        unsigned char sha1_hash[SHA_DIGEST_LENGTH];
 #endif
index 92f47a0..20b937d 100644 (file)
@@ -166,6 +166,8 @@ const char *X509_verify_cert_error_string(long n)
        return("Different CRL scope");
        case X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE:
        return("Unsupported extension feature");
+       case X509_V_ERR_UNNESTED_RESOURCE:
+               return("RFC 3779 resource not subset of parent's resources");
        default:
                BIO_snprintf(buf,sizeof buf,"error number %ld",n);
                return(buf);
index d1aa3da..d58f900 100644 (file)
@@ -314,6 +314,14 @@ int X509_verify_cert(X509_STORE_CTX *ctx)
                ok=internal_verify(ctx);
        if(!ok) goto end;
 
+#ifdef OPENSSL_RFC3779
+       /* RFC 3779 path validation, now that CRL check has been done */
+       ok = v3_asid_validate_path(ctx);
+       if (!ok) goto end;
+       ok = v3_addr_validate_path(ctx);
+       if (!ok) goto end;
+#endif
+
        /* If we get this far evaluate policies */
        if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
                ok = ctx->check_policy(ctx);
index bfca7c7..955af83 100644 (file)
@@ -339,6 +339,7 @@ void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth);
 #define                X509_V_ERR_DIFFERENT_CRL_SCOPE                  44
 #define                X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE        45
 
+#define                X509_V_ERR_UNNESTED_RESOURCE                    46
 
 /* The application is not happy */
 #define                X509_V_ERR_APPLICATION_VERIFICATION             50
index 7a5266e..556ef35 100644 (file)
@@ -21,12 +21,14 @@ LIBSRC=     v3_bcons.c v3_bitst.c v3_conf.c v3_extku.c v3_ia5.c v3_lib.c \
 v3_prn.c v3_utl.c v3err.c v3_genn.c v3_alt.c v3_skey.c v3_akey.c v3_pku.c \
 v3_int.c v3_enum.c v3_sxnet.c v3_cpols.c v3_crld.c v3_purp.c v3_info.c \
 v3_ocsp.c v3_akeya.c v3_pmaps.c v3_pcons.c v3_ncons.c v3_pcia.c v3_pci.c \
-pcy_cache.c pcy_node.c pcy_data.c pcy_map.c pcy_tree.c pcy_lib.c
+pcy_cache.c pcy_node.c pcy_data.c pcy_map.c pcy_tree.c pcy_lib.c \
+v3_asid.c v3_addr.c
 LIBOBJ= v3_bcons.o v3_bitst.o v3_conf.o v3_extku.o v3_ia5.o v3_lib.o \
 v3_prn.o v3_utl.o v3err.o v3_genn.o v3_alt.o v3_skey.o v3_akey.o v3_pku.o \
 v3_int.o v3_enum.o v3_sxnet.o v3_cpols.o v3_crld.o v3_purp.o v3_info.o \
 v3_ocsp.o v3_akeya.o v3_pmaps.o v3_pcons.o v3_ncons.o v3_pcia.o v3_pci.o \
-pcy_cache.o pcy_node.o pcy_data.o pcy_map.o pcy_tree.o pcy_lib.o
+pcy_cache.o pcy_node.o pcy_data.o pcy_map.o pcy_tree.o pcy_lib.o \
+v3_asid.o v3_addr.o
 
 SRC= $(LIBSRC)
 
@@ -166,6 +168,20 @@ pcy_tree.o: ../../include/openssl/sha.h ../../include/openssl/stack.h
 pcy_tree.o: ../../include/openssl/symhacks.h ../../include/openssl/x509.h
 pcy_tree.o: ../../include/openssl/x509_vfy.h ../../include/openssl/x509v3.h
 pcy_tree.o: ../cryptlib.h pcy_int.h pcy_tree.c
+v3_addr.o: ../../e_os.h ../../include/openssl/asn1.h
+v3_addr.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h
+v3_addr.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h
+v3_addr.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h
+v3_addr.o: ../../include/openssl/ec.h ../../include/openssl/ecdh.h
+v3_addr.o: ../../include/openssl/ecdsa.h ../../include/openssl/err.h
+v3_addr.o: ../../include/openssl/evp.h ../../include/openssl/lhash.h
+v3_addr.o: ../../include/openssl/obj_mac.h ../../include/openssl/objects.h
+v3_addr.o: ../../include/openssl/opensslconf.h ../../include/openssl/opensslv.h
+v3_addr.o: ../../include/openssl/ossl_typ.h ../../include/openssl/pkcs7.h
+v3_addr.o: ../../include/openssl/safestack.h ../../include/openssl/sha.h
+v3_addr.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
+v3_addr.o: ../../include/openssl/x509.h ../../include/openssl/x509_vfy.h
+v3_addr.o: ../../include/openssl/x509v3.h ../cryptlib.h v3_addr.c
 v3_akey.o: ../../e_os.h ../../include/openssl/asn1.h
 v3_akey.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h
 v3_akey.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h
@@ -208,6 +224,21 @@ v3_alt.o: ../../include/openssl/safestack.h ../../include/openssl/sha.h
 v3_alt.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
 v3_alt.o: ../../include/openssl/x509.h ../../include/openssl/x509_vfy.h
 v3_alt.o: ../../include/openssl/x509v3.h ../cryptlib.h v3_alt.c
+v3_asid.o: ../../e_os.h ../../include/openssl/asn1.h
+v3_asid.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h
+v3_asid.o: ../../include/openssl/bn.h ../../include/openssl/buffer.h
+v3_asid.o: ../../include/openssl/conf.h ../../include/openssl/crypto.h
+v3_asid.o: ../../include/openssl/e_os2.h ../../include/openssl/ec.h
+v3_asid.o: ../../include/openssl/ecdh.h ../../include/openssl/ecdsa.h
+v3_asid.o: ../../include/openssl/err.h ../../include/openssl/evp.h
+v3_asid.o: ../../include/openssl/lhash.h ../../include/openssl/obj_mac.h
+v3_asid.o: ../../include/openssl/objects.h ../../include/openssl/opensslconf.h
+v3_asid.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
+v3_asid.o: ../../include/openssl/pkcs7.h ../../include/openssl/safestack.h
+v3_asid.o: ../../include/openssl/sha.h ../../include/openssl/stack.h
+v3_asid.o: ../../include/openssl/symhacks.h ../../include/openssl/x509.h
+v3_asid.o: ../../include/openssl/x509_vfy.h ../../include/openssl/x509v3.h
+v3_asid.o: ../cryptlib.h v3_asid.c
 v3_bcons.o: ../../e_os.h ../../include/openssl/asn1.h
 v3_bcons.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h
 v3_bcons.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h
index e23ee9b..d1e3c99 100644 (file)
@@ -67,6 +67,7 @@ extern X509V3_EXT_METHOD v3_ocsp_crlid, v3_ocsp_nocheck, v3_ocsp_serviceloc;
 extern X509V3_EXT_METHOD v3_crl_hold, v3_pci;
 extern X509V3_EXT_METHOD v3_policy_mappings, v3_policy_constraints;
 extern X509V3_EXT_METHOD v3_name_constraints, v3_inhibit_anyp, v3_idp;
+extern X509V3_EXT_METHOD v3_addr, v3_asid;
 
 /* This table will be searched using OBJ_bsearch so it *must* kept in
  * order of the ext_nid values.
@@ -99,6 +100,10 @@ static X509V3_EXT_METHOD *standard_exts[] = {
 #endif
 &v3_sxnet,
 &v3_info,
+#ifdef OPENSSL_RFC3779
+&v3_addr,
+&v3_asid,
+#endif
 #ifndef OPENSSL_NO_OCSP
 &v3_ocsp_nonce,
 &v3_ocsp_crlid,
index 846a903..27d29f2 100644 (file)
@@ -628,6 +628,16 @@ int X509_policy_check(X509_POLICY_TREE **ptree, int *pexplicit_policy,
                /* Tree OK: continue */
 
                case 1:
+               if (!tree)
+                       /*
+                        * tree_init() returns success and a null tree
+                        * if it's just looking at a trust anchor.
+                        * I'm not sure that returning success here is
+                        * correct, but I'm sure that reporting this
+                        * as an internal error which our caller
+                        * interprets as a malloc failure is wrong.
+                        */
+                       return 1;
                break;
                }
 
diff --git a/crypto/x509v3/v3_addr.c b/crypto/x509v3/v3_addr.c
new file mode 100644 (file)
index 0000000..8ba2254
--- /dev/null
@@ -0,0 +1,1280 @@
+/*
+ * Contributed to the OpenSSL Project by the American Registry for
+ * Internet Numbers ("ARIN").
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ */
+
+/*
+ * Implementation of RFC 3779 section 2.2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/x509v3.h>
+
+#ifdef OPENSSL_RFC3779
+
+/*
+ * OpenSSL ASN.1 template translation of RFC 3779 2.2.3.
+ */
+
+ASN1_SEQUENCE(IPAddressRange) = {
+  ASN1_SIMPLE(IPAddressRange, min, ASN1_BIT_STRING),
+  ASN1_SIMPLE(IPAddressRange, max, ASN1_BIT_STRING)
+} ASN1_SEQUENCE_END(IPAddressRange)
+
+ASN1_CHOICE(IPAddressOrRange) = {
+  ASN1_SIMPLE(IPAddressOrRange, u.addressPrefix, ASN1_BIT_STRING),
+  ASN1_SIMPLE(IPAddressOrRange, u.addressRange,  IPAddressRange)
+} ASN1_CHOICE_END(IPAddressOrRange)
+
+ASN1_CHOICE(IPAddressChoice) = {
+  ASN1_SIMPLE(IPAddressChoice,      u.inherit,           ASN1_NULL),
+  ASN1_SEQUENCE_OF(IPAddressChoice, u.addressesOrRanges, IPAddressOrRange)
+} ASN1_CHOICE_END(IPAddressChoice)
+
+ASN1_SEQUENCE(IPAddressFamily) = {
+  ASN1_SIMPLE(IPAddressFamily, addressFamily,   ASN1_OCTET_STRING),
+  ASN1_SIMPLE(IPAddressFamily, ipAddressChoice, IPAddressChoice)
+} ASN1_SEQUENCE_END(IPAddressFamily)
+
+ASN1_ITEM_TEMPLATE(IPAddrBlocks) = 
+  ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0,
+                       IPAddrBlocks, IPAddressFamily)
+ASN1_ITEM_TEMPLATE_END(IPAddrBlocks)
+
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily)
+
+/*
+ * How much buffer space do we need for a raw address?
+ */
+#define ADDR_RAW_BUF_LEN       16
+
+/*
+ * What's the address length associated with this AFI?
+ */
+static int length_from_afi(const unsigned afi)
+{
+  switch (afi) {
+  case IANA_AFI_IPV4:
+    return 4;
+  case IANA_AFI_IPV6:
+    return 16;
+  default:
+    return 0;
+  }
+}
+
+/*
+ * Extract the AFI from an IPAddressFamily.
+ */
+unsigned v3_addr_get_afi(const IPAddressFamily *f)
+{
+  return ((f != NULL &&
+          f->addressFamily != NULL &&
+          f->addressFamily->data != NULL)
+         ? ((f->addressFamily->data[0] << 8) |
+            (f->addressFamily->data[1]))
+         : 0);
+}
+
+/*
+ * Expand the bitstring form of an address into a raw byte array.
+ * At the moment this is coded for simplicity, not speed.
+ */
+static void addr_expand(unsigned char *addr,
+                       const ASN1_BIT_STRING *bs,
+                       const int length,
+                       const unsigned char fill)
+{
+  assert(bs->length >= 0 && bs->length <= length);
+  if (bs->length > 0) {
+    memcpy(addr, bs->data, bs->length);
+    if ((bs->flags & 7) != 0) {
+      unsigned char mask = 0xFF >> (8 - (bs->flags & 7));
+      if (fill == 0)
+       addr[bs->length - 1] &= ~mask;
+      else
+       addr[bs->length - 1] |= mask;
+    }
+  }
+  memset(addr + bs->length, fill, length - bs->length);
+}
+
+/*
+ * Extract the prefix length from a bitstring.
+ */
+#define addr_prefixlen(bs) ((int) ((bs)->length * 8 - ((bs)->flags & 7)))
+
+/*
+ * i2r handler for one address bitstring.
+ */
+static int i2r_address(BIO *out,
+                      const unsigned afi,
+                      const unsigned char fill,
+                      const ASN1_BIT_STRING *bs)
+{
+  unsigned char addr[ADDR_RAW_BUF_LEN];
+  int i, n;
+
+  switch (afi) {
+  case IANA_AFI_IPV4:
+    addr_expand(addr, bs, 4, fill);
+    BIO_printf(out, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
+    break;
+  case IANA_AFI_IPV6:
+    addr_expand(addr, bs, 16, fill);
+    for (n = 16; n > 1 && addr[n-1] == 0x00 && addr[n-2] == 0x00; n -= 2)
+      ;
+    for (i = 0; i < n; i += 2)
+      BIO_printf(out, "%x%s", (addr[i] << 8) | addr[i+1], (i < 14 ? ":" : ""));
+    if (i < 16)
+      BIO_puts(out, ":");
+    break;
+  default:
+    for (i = 0; i < bs->length; i++)
+      BIO_printf(out, "%s%02x", (i > 0 ? ":" : ""), bs->data[i]);
+    BIO_printf(out, "[%d]", (int) (bs->flags & 7));
+    break;
+  }
+  return 1;
+}
+
+/*
+ * i2r handler for a sequence of addresses and ranges.
+ */
+static int i2r_IPAddressOrRanges(BIO *out,
+                                const int indent,
+                                const IPAddressOrRanges *aors,
+                                const unsigned afi)
+{
+  int i;
+  for (i = 0; i < sk_IPAddressOrRange_num(aors); i++) {
+    const IPAddressOrRange *aor = sk_IPAddressOrRange_value(aors, i);
+    BIO_printf(out, "%*s", indent, "");
+    switch (aor->type) {
+    case IPAddressOrRange_addressPrefix:
+      if (!i2r_address(out, afi, 0x00, aor->u.addressPrefix))
+       return 0;
+      BIO_printf(out, "/%d\n", addr_prefixlen(aor->u.addressPrefix));
+      continue;
+    case IPAddressOrRange_addressRange:
+      if (!i2r_address(out, afi, 0x00, aor->u.addressRange->min))
+       return 0;
+      BIO_puts(out, "-");
+      if (!i2r_address(out, afi, 0xFF, aor->u.addressRange->max))
+       return 0;
+      BIO_puts(out, "\n");
+      continue;
+    }
+  }
+  return 1;
+}
+
+/*
+ * i2r handler for an IPAddrBlocks extension.
+ */
+static int i2r_IPAddrBlocks(X509V3_EXT_METHOD *method,
+                           void *ext,
+                           BIO *out,
+                           int indent)
+{
+  const IPAddrBlocks *addr = ext;
+  int i;
+  for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+    IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+    const unsigned afi = v3_addr_get_afi(f);
+    switch (afi) {
+    case IANA_AFI_IPV4:
+      BIO_printf(out, "%*sIPv4", indent, "");
+      break;
+    case IANA_AFI_IPV6:
+      BIO_printf(out, "%*sIPv6", indent, "");
+      break;
+    default:
+      BIO_printf(out, "%*sUnknown AFI %u", indent, "", afi);
+      break;
+    }
+    if (f->addressFamily->length > 2) {
+      switch (f->addressFamily->data[2]) {
+      case   1:
+       BIO_puts(out, " (Unicast)");
+       break;
+      case   2:
+       BIO_puts(out, " (Multicast)");
+       break;
+      case   3:
+       BIO_puts(out, " (Unicast/Multicast)");
+       break;
+      case   4:
+       BIO_puts(out, " (MPLS)");
+       break;
+      case  64:
+       BIO_puts(out, " (Tunnel)");
+       break;
+      case  65:
+       BIO_puts(out, " (VPLS)");
+       break;
+      case  66:
+       BIO_puts(out, " (BGP MDT)");
+       break;
+      case 128:
+       BIO_puts(out, " (MPLS-labeled VPN)");
+       break;
+      default:  
+       BIO_printf(out, " (Unknown SAFI %u)",
+                  (unsigned) f->addressFamily->data[2]);
+       break;
+      }
+    }
+    switch (f->ipAddressChoice->type) {
+    case IPAddressChoice_inherit:
+      BIO_puts(out, ": inherit\n");
+      break;
+    case IPAddressChoice_addressesOrRanges:
+      BIO_puts(out, ":\n");
+      if (!i2r_IPAddressOrRanges(out,
+                                indent + 2,
+                                f->ipAddressChoice->u.addressesOrRanges,
+                                afi))
+       return 0;
+      break;
+    }
+  }
+  return 1;
+}
+
+/*
+ * Sort comparison function for a sequence of IPAddressOrRange
+ * elements.
+ */
+static int IPAddressOrRange_cmp(const IPAddressOrRange *a,
+                               const IPAddressOrRange *b,
+                               const int length)
+{
+  unsigned char addr_a[ADDR_RAW_BUF_LEN], addr_b[ADDR_RAW_BUF_LEN];
+  int prefixlen_a = 0, prefixlen_b = 0;
+  int r;
+
+  switch (a->type) {
+  case IPAddressOrRange_addressPrefix:
+    addr_expand(addr_a, a->u.addressPrefix, length, 0x00);
+    prefixlen_a = addr_prefixlen(a->u.addressPrefix);
+    break;
+  case IPAddressOrRange_addressRange:
+    addr_expand(addr_a, a->u.addressRange->min, length, 0x00);
+    prefixlen_a = length * 8;
+    break;
+  }
+
+  switch (b->type) {
+  case IPAddressOrRange_addressPrefix:
+    addr_expand(addr_b, b->u.addressPrefix, length, 0x00);
+    prefixlen_b = addr_prefixlen(b->u.addressPrefix);
+    break;
+  case IPAddressOrRange_addressRange:
+    addr_expand(addr_b, b->u.addressRange->min, length, 0x00);
+    prefixlen_b = length * 8;
+    break;
+  }
+
+  if ((r = memcmp(addr_a, addr_b, length)) != 0)
+    return r;
+  else
+    return prefixlen_a - prefixlen_b;
+}
+
+/*
+ * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort()
+ * comparision routines are only allowed two arguments.
+ */
+static int v4IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
+                                 const IPAddressOrRange * const *b)
+{
+  return IPAddressOrRange_cmp(*a, *b, 4);
+}
+
+/*
+ * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort()
+ * comparision routines are only allowed two arguments.
+ */
+static int v6IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
+                                 const IPAddressOrRange * const *b)
+{
+  return IPAddressOrRange_cmp(*a, *b, 16);
+}
+
+/*
+ * Calculate whether a range collapses to a prefix.
+ * See last paragraph of RFC 3779 2.2.3.7.
+ */
+static int range_should_be_prefix(const unsigned char *min,
+                                 const unsigned char *max,
+                                 const int length)
+{
+  unsigned char mask;
+  int i, j;
+
+  for (i = 0; i < length && min[i] == max[i]; i++)
+    ;
+  for (j = length - 1; j >= 0 && min[j] == 0x00 && max[j] == 0xFF; j--)
+    ;
+  if (i < j)
+    return -1;
+  if (i > j)
+    return i * 8;
+  mask = min[i] ^ max[i];
+  switch (mask) {
+  case 0x01: j = 7; break;
+  case 0x03: j = 6; break;
+  case 0x07: j = 5; break;
+  case 0x0F: j = 4; break;
+  case 0x1F: j = 3; break;
+  case 0x3F: j = 2; break;
+  case 0x7F: j = 1; break;
+  default:   return -1;
+  }
+  if ((min[i] & mask) != 0 || (max[i] & mask) != mask)
+    return -1;
+  else
+    return i * 8 + j;
+}
+
+/*
+ * Construct a prefix.
+ */
+static int make_addressPrefix(IPAddressOrRange **result,
+                             unsigned char *addr,
+                             const int prefixlen)
+{
+  int bytelen = (prefixlen + 7) / 8, bitlen = prefixlen % 8;
+  IPAddressOrRange *aor = IPAddressOrRange_new();
+
+  if (aor == NULL)
+    return 0;
+  aor->type = IPAddressOrRange_addressPrefix;
+  if (aor->u.addressPrefix == NULL &&
+      (aor->u.addressPrefix = ASN1_BIT_STRING_new()) == NULL)
+    goto err;
+  if (!ASN1_BIT_STRING_set(aor->u.addressPrefix, addr, bytelen))
+    goto err;
+  aor->u.addressPrefix->flags &= ~7;
+  aor->u.addressPrefix->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+  if (bitlen > 0) {
+    aor->u.addressPrefix->data[bytelen - 1] &= ~(0xFF >> bitlen);
+    aor->u.addressPrefix->flags |= 8 - bitlen;
+  }
+  
+  *result = aor;
+  return 1;
+
+ err:
+  IPAddressOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Construct a range.  If it can be expressed as a prefix,
+ * return a prefix instead.  Doing this here simplifies
+ * the rest of the code considerably.
+ */
+static int make_addressRange(IPAddressOrRange **result,
+                            unsigned char *min,
+                            unsigned char *max,
+                            const int length)
+{
+  IPAddressOrRange *aor;
+  int i, prefixlen;
+
+  if ((prefixlen = range_should_be_prefix(min, max, length)) >= 0)
+    return make_addressPrefix(result, min, prefixlen);
+
+  if ((aor = IPAddressOrRange_new()) == NULL)
+    return 0;
+  aor->type = IPAddressOrRange_addressRange;
+  assert(aor->u.addressRange == NULL);
+  if ((aor->u.addressRange = IPAddressRange_new()) == NULL)
+    goto err;
+  if (aor->u.addressRange->min == NULL &&
+      (aor->u.addressRange->min = ASN1_BIT_STRING_new()) == NULL)
+    goto err;
+  if (aor->u.addressRange->max == NULL &&
+      (aor->u.addressRange->max = ASN1_BIT_STRING_new()) == NULL)
+    goto err;
+
+  for (i = length; i > 0 && min[i - 1] == 0x00; --i)
+    ;
+  if (!ASN1_BIT_STRING_set(aor->u.addressRange->min, min, i))
+    goto err;
+  aor->u.addressRange->min->flags &= ~7;
+  aor->u.addressRange->min->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+  if (i > 0) {
+    unsigned char b = min[i - 1];
+    int j = 1;
+    while ((b & (0xFFU >> j)) != 0) 
+      ++j;
+    aor->u.addressRange->min->flags |= 8 - j;
+  }
+
+  for (i = length; i > 0 && max[i - 1] == 0xFF; --i)
+    ;
+  if (!ASN1_BIT_STRING_set(aor->u.addressRange->max, max, i))
+    goto err;
+  aor->u.addressRange->max->flags &= ~7;
+  aor->u.addressRange->max->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+  if (i > 0) {
+    unsigned char b = max[i - 1];
+    int j = 1;
+    while ((b & (0xFFU >> j)) != (0xFFU >> j))
+      ++j;
+    aor->u.addressRange->max->flags |= 8 - j;
+  }
+
+  *result = aor;
+  return 1;
+
+ err:
+  IPAddressOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Construct a new address family or find an existing one.
+ */
+static IPAddressFamily *make_IPAddressFamily(IPAddrBlocks *addr,
+                                            const unsigned afi,
+                                            const unsigned *safi)
+{
+  IPAddressFamily *f;
+  unsigned char key[3];
+  unsigned keylen;
+  int i;
+
+  key[0] = (afi >> 8) & 0xFF;
+  key[1] = afi & 0xFF;
+  if (safi != NULL) {
+    key[2] = *safi & 0xFF;
+    keylen = 3;
+  } else {
+    keylen = 2;
+  }
+
+  for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+    f = sk_IPAddressFamily_value(addr, i);
+    assert(f->addressFamily->data != NULL);
+    if (f->addressFamily->length == keylen &&
+       !memcmp(f->addressFamily->data, key, keylen))
+      return f;
+  }
+
+  if ((f = IPAddressFamily_new()) == NULL)
+    goto err;
+  if (f->ipAddressChoice == NULL &&
+      (f->ipAddressChoice = IPAddressChoice_new()) == NULL)
+    goto err;
+  if (f->addressFamily == NULL && 
+      (f->addressFamily = ASN1_OCTET_STRING_new()) == NULL)
+    goto err;
+  if (!ASN1_OCTET_STRING_set(f->addressFamily, key, keylen))
+    goto err;
+  if (!sk_IPAddressFamily_push(addr, f))
+    goto err;
+
+  return f;
+
+ err:
+  IPAddressFamily_free(f);
+  return NULL;
+}
+
+/*
+ * Add an inheritance element.
+ */
+int v3_addr_add_inherit(IPAddrBlocks *addr,
+                       const unsigned afi,
+                       const unsigned *safi)
+{
+  IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
+  if (f == NULL ||
+      f->ipAddressChoice == NULL ||
+      (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
+       f->ipAddressChoice->u.addressesOrRanges != NULL))
+    return 0;
+  if (f->ipAddressChoice->type == IPAddressChoice_inherit &&
+      f->ipAddressChoice->u.inherit != NULL)
+    return 1;
+  if (f->ipAddressChoice->u.inherit == NULL &&
+      (f->ipAddressChoice->u.inherit = ASN1_NULL_new()) == NULL)
+    return 0;
+  f->ipAddressChoice->type = IPAddressChoice_inherit;
+  return 1;
+}
+
+/*
+ * Construct an IPAddressOrRange sequence, or return an existing one.
+ */
+static IPAddressOrRanges *make_prefix_or_range(IPAddrBlocks *addr,
+                                              const unsigned afi,
+                                              const unsigned *safi)
+{
+  IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
+  IPAddressOrRanges *aors = NULL;
+
+  if (f == NULL ||
+      f->ipAddressChoice == NULL ||
+      (f->ipAddressChoice->type == IPAddressChoice_inherit &&
+       f->ipAddressChoice->u.inherit != NULL))
+    return NULL;
+  if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges)
+    aors = f->ipAddressChoice->u.addressesOrRanges;
+  if (aors != NULL)
+    return aors;
+  if ((aors = sk_IPAddressOrRange_new_null()) == NULL)
+    return NULL;
+  switch (afi) {
+  case IANA_AFI_IPV4:
+    sk_IPAddressOrRange_set_cmp_func(aors, v4IPAddressOrRange_cmp);
+    break;
+  case IANA_AFI_IPV6:
+    sk_IPAddressOrRange_set_cmp_func(aors, v6IPAddressOrRange_cmp);
+    break;
+  }
+  f->ipAddressChoice->type = IPAddressChoice_addressesOrRanges;
+  f->ipAddressChoice->u.addressesOrRanges = aors;
+  return aors;
+}
+
+/*
+ * Add a prefix.
+ */
+int v3_addr_add_prefix(IPAddrBlocks *addr,
+                      const unsigned afi,
+                      const unsigned *safi,
+                      unsigned char *a,
+                      const int prefixlen)
+{
+  IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
+  IPAddressOrRange *aor;
+  if (aors == NULL || !make_addressPrefix(&aor, a, prefixlen))
+    return 0;
+  if (sk_IPAddressOrRange_push(aors, aor))
+    return 1;
+  IPAddressOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Add a range.
+ */
+int v3_addr_add_range(IPAddrBlocks *addr,
+                     const unsigned afi,
+                     const unsigned *safi,
+                     unsigned char *min,
+                     unsigned char *max)
+{
+  IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
+  IPAddressOrRange *aor;
+  int length = length_from_afi(afi);
+  if (aors == NULL)
+    return 0;
+  if (!make_addressRange(&aor, min, max, length))
+    return 0;
+  if (sk_IPAddressOrRange_push(aors, aor))
+    return 1;
+  IPAddressOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Extract min and max values from an IPAddressOrRange.
+ */
+static void extract_min_max(IPAddressOrRange *aor,
+                           unsigned char *min,
+                           unsigned char *max,
+                           int length)
+{
+  assert(aor != NULL && min != NULL && max != NULL);
+  switch (aor->type) {
+  case IPAddressOrRange_addressPrefix:
+    addr_expand(min, aor->u.addressPrefix, length, 0x00);
+    addr_expand(max, aor->u.addressPrefix, length, 0xFF);
+    return;
+  case IPAddressOrRange_addressRange:
+    addr_expand(min, aor->u.addressRange->min, length, 0x00);
+    addr_expand(max, aor->u.addressRange->max, length, 0xFF);
+    return;
+  }
+}
+
+/*
+ * Public wrapper for extract_min_max().
+ */
+int v3_addr_get_range(IPAddressOrRange *aor,
+                     const unsigned afi,
+                     unsigned char *min,
+                     unsigned char *max,
+                     const int length)
+{
+  int afi_length = length_from_afi(afi);
+  if (aor == NULL || min == NULL || max == NULL ||
+      afi_length == 0 || length < afi_length ||
+      (aor->type != IPAddressOrRange_addressPrefix &&
+       aor->type != IPAddressOrRange_addressRange))
+    return 0;
+  extract_min_max(aor, min, max, afi_length);
+  return afi_length;
+}
+
+/*
+ * Sort comparision function for a sequence of IPAddressFamily.
+ *
+ * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about
+ * the ordering: I can read it as meaning that IPv6 without a SAFI
+ * comes before IPv4 with a SAFI, which seems pretty weird.  The
+ * examples in appendix B suggest that the author intended the
+ * null-SAFI rule to apply only within a single AFI, which is what I
+ * would have expected and is what the following code implements.
+ */
+static int IPAddressFamily_cmp(const IPAddressFamily * const *a_,
+                              const IPAddressFamily * const *b_)
+{
+  const ASN1_OCTET_STRING *a = (*a_)->addressFamily;
+  const ASN1_OCTET_STRING *b = (*b_)->addressFamily;
+  int len = ((a->length <= b->length) ? a->length : b->length);
+  int cmp = memcmp(a->data, b->data, len);
+  return cmp ? cmp : a->length - b->length;
+}
+
+/*
+ * Check whether an IPAddrBLocks is in canonical form.
+ */
+int v3_addr_is_canonical(IPAddrBlocks *addr)
+{
+  unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
+  unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
+  IPAddressOrRanges *aors;
+  int i, j, k;
+
+  /*
+   * Empty extension is cannonical.
+   */
+  if (addr == NULL)
+    return 1;
+
+  /*
+   * Check whether the top-level list is in order.
+   */
+  for (i = 0; i < sk_IPAddressFamily_num(addr) - 1; i++) {
+    const IPAddressFamily *a = sk_IPAddressFamily_value(addr, i);
+    const IPAddressFamily *b = sk_IPAddressFamily_value(addr, i + 1);
+    if (IPAddressFamily_cmp(&a, &b) >= 0)
+      return 0;
+  }
+
+  /*
+   * Top level's ok, now check each address family.
+   */
+  for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+    IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+    int length = length_from_afi(v3_addr_get_afi(f));
+
+    /*
+     * Inheritance is canonical.  Anything other than inheritance or
+     * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something.
+     */
+    if (f == NULL || f->ipAddressChoice == NULL)
+      return 0;
+    switch (f->ipAddressChoice->type) {
+    case IPAddressChoice_inherit:
+      continue;
+    case IPAddressChoice_addressesOrRanges:
+      break;
+    default:
+      return 0;
+    }
+
+    /*
+     * It's an IPAddressOrRanges sequence, check it.
+     */
+    aors = f->ipAddressChoice->u.addressesOrRanges;
+    if (sk_IPAddressOrRange_num(aors) == 0)
+      return 0;
+    for (j = 0; j < sk_IPAddressOrRange_num(aors) - 1; j++) {
+      IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
+      IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, j + 1);
+
+      extract_min_max(a, a_min, a_max, length);
+      extract_min_max(b, b_min, b_max, length);
+
+      /*
+       * Punt misordered list, overlapping start, or inverted range.
+       */
+      if (memcmp(a_min, b_min, length) >= 0 ||
+         memcmp(a_min, a_max, length) > 0 ||
+         memcmp(b_min, b_max, length) > 0)
+       return 0;
+
+      /*
+       * Punt if adjacent or overlapping.  Check for adjacency by
+       * subtracting one from b_min first.
+       */
+      for (k = length - 1; k >= 0 && b_min[k]-- == 0x00; k--)
+       ;
+      if (memcmp(a_max, b_min, length) >= 0)
+       return 0;
+
+      /*
+       * Check for range that should be expressed as a prefix.
+       */
+      if (a->type == IPAddressOrRange_addressRange &&
+         range_should_be_prefix(a_min, a_max, length) >= 0)
+       return 0;
+    }
+
+    /*
+     * Check final range to see if it should be a prefix.
+     */
+    j = sk_IPAddressOrRange_num(aors) - 1;
+    {
+      IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
+      if (a->type == IPAddressOrRange_addressRange) {
+       extract_min_max(a, a_min, a_max, length);
+       if (range_should_be_prefix(a_min, a_max, length) >= 0)
+         return 0;
+      }
+    }
+  }
+
+  /*
+   * If we made it through all that, we're happy.
+   */
+  return 1;
+}
+
+/*
+ * Whack an IPAddressOrRanges into canonical form.
+ */
+static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors,
+                                     const unsigned afi)
+{
+  int i, j, length = length_from_afi(afi);
+
+  /*
+   * Sort the IPAddressOrRanges sequence.
+   */
+  sk_IPAddressOrRange_sort(aors);
+
+  /*
+   * Clean up representation issues, punt on duplicates or overlaps.
+   */
+  for (i = 0; i < sk_IPAddressOrRange_num(aors) - 1; i++) {
+    IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, i);
+    IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, i + 1);
+    unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
+    unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
+
+    extract_min_max(a, a_min, a_max, length);
+    extract_min_max(b, b_min, b_max, length);
+
+    /*
+     * Punt overlaps.
+     */
+    if (memcmp(a_max, b_min, length) >= 0)
+      return 0;
+
+    /*
+     * Merge if a and b are adjacent.  We check for
+     * adjacency by subtracting one from b_min first.
+     */
+    for (j = length - 1; j >= 0 && b_min[j]-- == 0x00; j--)
+      ;
+    if (memcmp(a_max, b_min, length) == 0) {
+      IPAddressOrRange *merged;
+      if (!make_addressRange(&merged, a_min, b_max, length))
+       return 0;
+      sk_IPAddressOrRange_set(aors, i, merged);
+      sk_IPAddressOrRange_delete(aors, i + 1);
+      IPAddressOrRange_free(a);
+      IPAddressOrRange_free(b);
+      --i;
+      continue;
+    }
+  }
+
+  return 1;
+}
+
+/*
+ * Whack an IPAddrBlocks extension into canonical form.
+ */
+int v3_addr_canonize(IPAddrBlocks *addr)
+{
+  int i;
+  for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+    IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+    if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
+       !IPAddressOrRanges_canonize(f->ipAddressChoice->u.addressesOrRanges,
+                                   v3_addr_get_afi(f)))
+      return 0;
+  }
+  sk_IPAddressFamily_sort(addr);
+  assert(v3_addr_is_canonical(addr));
+  return 1;
+}
+
+/*
+ * v2i handler for the IPAddrBlocks extension.
+ */
+static void *v2i_IPAddrBlocks(struct v3_ext_method *method,
+                             struct v3_ext_ctx *ctx,
+                             STACK_OF(CONF_VALUE) *values)
+{
+  static const char v4addr_chars[] = "0123456789.";
+  static const char v6addr_chars[] = "0123456789.:abcdefABCDEF";
+  IPAddrBlocks *addr = NULL;
+  char *s = NULL, *t;
+  int i;
+  
+  if ((addr = sk_IPAddressFamily_new(IPAddressFamily_cmp)) == NULL) {
+    X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+    return NULL;
+  }
+
+  for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
+    CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
+    unsigned char min[ADDR_RAW_BUF_LEN], max[ADDR_RAW_BUF_LEN];
+    unsigned afi, *safi = NULL, safi_;
+    const char *addr_chars;
+    int prefixlen, i1, i2, delim, length;
+
+    if (       !name_cmp(val->name, "IPv4")) {
+      afi = IANA_AFI_IPV4;
+    } else if (!name_cmp(val->name, "IPv6")) {
+      afi = IANA_AFI_IPV6;
+    } else if (!name_cmp(val->name, "IPv4-SAFI")) {
+      afi = IANA_AFI_IPV4;
+      safi = &safi_;
+    } else if (!name_cmp(val->name, "IPv6-SAFI")) {
+      afi = IANA_AFI_IPV6;
+      safi = &safi_;
+    } else {
+      X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_NAME_ERROR);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    switch (afi) {
+    case IANA_AFI_IPV4:
+      addr_chars = v4addr_chars;
+      break;
+    case IANA_AFI_IPV6:
+      addr_chars = v6addr_chars;
+      break;
+    }
+
+    length = length_from_afi(afi);
+
+    /*
+     * Handle SAFI, if any, and strdup() so we can null-terminate
+     * the other input values.
+     */
+    if (safi != NULL) {
+      *safi = strtoul(val->value, &t, 0);
+      t += strspn(t, " \t");
+      if (*safi > 0xFF || *t++ != ':') {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_SAFI);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      t += strspn(t, " \t");
+      s = strdup(t);
+    } else {
+      s = strdup(val->value);
+    }
+    if (s == NULL) {
+      X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+      goto err;
+    }
+
+    /*
+     * Check for inheritance.  Not worth additional complexity to
+     * optimize this (seldom-used) case.
+     */
+    if (!strcmp(s, "inherit")) {
+      if (!v3_addr_add_inherit(addr, afi, safi)) {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_INHERITANCE);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      OPENSSL_free(s);
+      s = NULL;
+      continue;
+    }
+
+    i1 = strspn(s, addr_chars);
+    i2 = i1 + strspn(s + i1, " \t");
+    delim = s[i2++];
+    s[i1] = '\0';
+
+    if (a2i_ipadd(min, s) != length) {
+      X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    switch (delim) {
+    case '/':
+      prefixlen = (int) strtoul(s + i2, &t, 10);
+      if (t == s + i2 || *t != '\0') {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      if (!v3_addr_add_prefix(addr, afi, safi, min, prefixlen)) {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+      break;
+    case '-':
+      i1 = i2 + strspn(s + i2, " \t");
+      i2 = i1 + strspn(s + i1, addr_chars);
+      if (i1 == i2 || s[i2] != '\0') {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      if (a2i_ipadd(max, s + i1) != length) {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      if (!v3_addr_add_range(addr, afi, safi, min, max)) {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+      break;
+    case '\0':
+      if (!v3_addr_add_prefix(addr, afi, safi, min, length * 8)) {
+       X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+      break;
+    default:
+      X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    OPENSSL_free(s);
+    s = NULL;
+  }
+
+  /*
+   * Canonize the result, then we're done.
+   */
+  if (!v3_addr_canonize(addr))
+    goto err;    
+  return addr;
+
+ err:
+  OPENSSL_free(s);
+  sk_IPAddressFamily_pop_free(addr, IPAddressFamily_free);
+  return NULL;
+}
+
+/*
+ * OpenSSL dispatch
+ */
+X509V3_EXT_METHOD v3_addr = {
+  NID_sbgp_ipAddrBlock,                /* nid */
+  0,                           /* flags */
+  ASN1_ITEM_ref(IPAddrBlocks), /* template */
+  0, 0, 0, 0,                  /* old functions, ignored */
+  0,                           /* i2s */
+  0,                           /* s2i */
+  0,                           /* i2v */
+  v2i_IPAddrBlocks,            /* v2i */
+  i2r_IPAddrBlocks,            /* i2r */
+  0,                           /* r2i */
+  NULL                         /* extension-specific data */
+};
+
+/*
+ * Figure out whether extension sues inheritance.
+ */
+int v3_addr_inherits(IPAddrBlocks *addr)
+{
+  int i;
+  if (addr == NULL)
+    return 0;
+  for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+    IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+    if (f->ipAddressChoice->type == IPAddressChoice_inherit)
+      return 1;
+  }
+  return 0;
+}
+
+/*
+ * Figure out whether parent contains child.
+ */
+static int addr_contains(IPAddressOrRanges *parent,
+                        IPAddressOrRanges *child,
+                        int length)
+{
+  unsigned char p_min[ADDR_RAW_BUF_LEN], p_max[ADDR_RAW_BUF_LEN];
+  unsigned char c_min[ADDR_RAW_BUF_LEN], c_max[ADDR_RAW_BUF_LEN];
+  int p, c;
+
+  if (child == NULL || parent == child)
+    return 1;
+  if (parent == NULL)
+    return 0;
+
+  p = 0;
+  for (c = 0; c < sk_IPAddressOrRange_num(child); c++) {
+    extract_min_max(sk_IPAddressOrRange_value(child, c),
+                   c_min, c_max, length);
+    for (;; p++) {
+      if (p >= sk_IPAddressOrRange_num(parent))
+       return 0;
+      extract_min_max(sk_IPAddressOrRange_value(parent, p),
+                     p_min, p_max, length);
+      if (memcmp(p_max, c_max, length) < 0)
+       continue;
+      if (memcmp(p_min, c_min, length) > 0)
+       return 0;
+      break;
+    }
+  }
+
+  return 1;
+}
+
+/*
+ * Test whether a is a subset of b.
+ */
+int v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b)
+{
+  int i;
+  if (a == NULL || a == b)
+    return 1;
+  if (b == NULL || v3_addr_inherits(a) || v3_addr_inherits(b))
+    return 0;
+  sk_IPAddressFamily_set_cmp_func(b, IPAddressFamily_cmp);
+  for (i = 0; i < sk_IPAddressFamily_num(a); i++) {
+    IPAddressFamily *fa = sk_IPAddressFamily_value(a, i);
+    int j = sk_IPAddressFamily_find(b, fa);
+    IPAddressFamily *fb = sk_IPAddressFamily_value(b, j);
+    if (!addr_contains(fb->ipAddressChoice->u.addressesOrRanges, 
+                      fa->ipAddressChoice->u.addressesOrRanges,
+                      length_from_afi(v3_addr_get_afi(fb))))
+      return 0;
+  }
+  return 1;
+}
+
+/*
+ * Validation error handling via callback.
+ */
+#define validation_err(_err_)          \
+  do {                                 \
+    if (ctx != NULL) {                 \
+      ctx->error = _err_;              \
+      ctx->error_depth = i;            \
+      ctx->current_cert = x;           \
+      ret = ctx->verify_cb(0, ctx);    \
+    } else {                           \
+      ret = 0;                         \
+    }                                  \
+    if (!ret)                          \
+      goto done;                       \
+  } while (0)
+
+/*
+ * Core code for RFC 3779 2.3 path validation.
+ */
+static int v3_addr_validate_path_internal(X509_STORE_CTX *ctx,
+                                         STACK_OF(X509) *chain,
+                                         IPAddrBlocks *ext)
+{
+  IPAddrBlocks *child = NULL;
+  int i, j, ret = 1;
+  X509 *x;
+
+  assert(chain != NULL && sk_X509_num(chain) > 0);
+  assert(ctx != NULL || ext != NULL);
+  assert(ctx == NULL || ctx->verify_cb != NULL);
+
+  /*
+   * Figure out where to start.  If we don't have an extension to
+   * check, we're done.  Otherwise, check canonical form and
+   * set up for walking up the chain.
+   */
+  if (ext != NULL) {
+    i = -1;
+    x = NULL;
+  } else {
+    i = 0;
+    x = sk_X509_value(chain, i);
+    assert(x != NULL);
+    if ((ext = x->rfc3779_addr) == NULL)
+      goto done;
+  }
+  if (!v3_addr_is_canonical(ext))
+    validation_err(X509_V_ERR_INVALID_EXTENSION);
+  sk_IPAddressFamily_set_cmp_func(ext, IPAddressFamily_cmp);
+  if ((child = sk_IPAddressFamily_dup(ext)) == NULL) {
+    X509V3err(X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL, ERR_R_MALLOC_FAILURE);
+    ret = 0;
+    goto done;
+  }
+
+  /*
+   * Now walk up the chain.  No cert may list resources that its
+   * parent doesn't list.
+   */
+  for (i++; i < sk_X509_num(chain); i++) {
+    x = sk_X509_value(chain, i);
+    assert(x != NULL);
+    if (!v3_addr_is_canonical(x->rfc3779_addr))
+      validation_err(X509_V_ERR_INVALID_EXTENSION);
+    if (x->rfc3779_addr == NULL) {
+      for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
+       IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
+       if (fc->ipAddressChoice->type != IPAddressChoice_inherit) {
+         validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+         break;
+       }
+      }
+      continue;
+    }
+    sk_IPAddressFamily_set_cmp_func(x->rfc3779_addr, IPAddressFamily_cmp);
+    for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
+      IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
+      int k = sk_IPAddressFamily_find(x->rfc3779_addr, fc);
+      IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, k);
+      if (fp == NULL) {
+       if (fc->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
+         validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+         break;
+       }
+       continue;
+      }
+      if (fp->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
+       if (fc->ipAddressChoice->type == IPAddressChoice_inherit ||
+           addr_contains(fp->ipAddressChoice->u.addressesOrRanges, 
+                         fc->ipAddressChoice->u.addressesOrRanges,
+                         length_from_afi(v3_addr_get_afi(fc))))
+         sk_IPAddressFamily_set(child, j, fp);
+       else
+         validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      }
+    }
+  }
+
+  /*
+   * Trust anchor can't inherit.
+   */
+  assert(x != NULL);
+  if (x->rfc3779_addr != NULL) {
+    for (j = 0; j < sk_IPAddressFamily_num(x->rfc3779_addr); j++) {
+      IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, j);
+      if (fp->ipAddressChoice->type == IPAddressChoice_inherit &&
+         sk_IPAddressFamily_find(child, fp) >= 0)
+       validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+    }
+  }
+
+ done:
+  sk_IPAddressFamily_free(child);
+  return ret;
+}
+
+#undef validation_err
+
+/*
+ * RFC 3779 2.3 path validation -- called from X509_verify_cert().
+ */
+int v3_addr_validate_path(X509_STORE_CTX *ctx)
+{
+  return v3_addr_validate_path_internal(ctx, ctx->chain, NULL);
+}
+
+/*
+ * RFC 3779 2.3 path validation of an extension.
+ * Test whether chain covers extension.
+ */
+int v3_addr_validate_resource_set(STACK_OF(X509) *chain,
+                                 IPAddrBlocks *ext,
+                                 int allow_inheritance)
+{
+  if (ext == NULL)
+    return 1;
+  if (chain == NULL || sk_X509_num(chain) == 0)
+    return 0;
+  if (!allow_inheritance && v3_addr_inherits(ext))
+    return 0;
+  return v3_addr_validate_path_internal(NULL, chain, ext);
+}
+
+#endif /* OPENSSL_RFC3779 */
diff --git a/crypto/x509v3/v3_asid.c b/crypto/x509v3/v3_asid.c
new file mode 100644 (file)
index 0000000..68e7661
--- /dev/null
@@ -0,0 +1,844 @@
+/*
+ * Contributed to the OpenSSL Project by the American Registry for
+ * Internet Numbers ("ARIN").
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ */
+
+/*
+ * Implementation of RFC 3779 section 3.2.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/x509v3.h>
+#include <openssl/x509.h>
+#include <openssl/bn.h>
+
+#ifdef OPENSSL_RFC3779
+
+/*
+ * OpenSSL ASN.1 template translation of RFC 3779 3.2.3.
+ */
+
+ASN1_SEQUENCE(ASRange) = {
+  ASN1_SIMPLE(ASRange, min, ASN1_INTEGER),
+  ASN1_SIMPLE(ASRange, max, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(ASRange)
+
+ASN1_CHOICE(ASIdOrRange) = {
+  ASN1_SIMPLE(ASIdOrRange, u.id,    ASN1_INTEGER),
+  ASN1_SIMPLE(ASIdOrRange, u.range, ASRange)
+} ASN1_CHOICE_END(ASIdOrRange)
+
+ASN1_CHOICE(ASIdentifierChoice) = {
+  ASN1_SIMPLE(ASIdentifierChoice,      u.inherit,       ASN1_NULL),
+  ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange)
+} ASN1_CHOICE_END(ASIdentifierChoice)
+
+ASN1_SEQUENCE(ASIdentifiers) = {
+  ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0),
+  ASN1_EXP_OPT(ASIdentifiers, rdi,   ASIdentifierChoice, 1)
+} ASN1_SEQUENCE_END(ASIdentifiers)
+
+IMPLEMENT_ASN1_FUNCTIONS(ASRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers)
+
+/*
+ * i2r method for an ASIdentifierChoice.
+ */
+static int i2r_ASIdentifierChoice(BIO *out,
+                                 ASIdentifierChoice *choice,
+                                 int indent,
+                                 const char *msg)
+{
+  int i;
+  char *s;
+  if (choice == NULL)
+    return 1;
+  BIO_printf(out, "%*s%s:\n", indent, "", msg);
+  switch (choice->type) {
+  case ASIdentifierChoice_inherit:
+    BIO_printf(out, "%*sinherit\n", indent + 2, "");
+    break;
+  case ASIdentifierChoice_asIdsOrRanges:
+    for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges); i++) {
+      ASIdOrRange *aor = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+      switch (aor->type) {
+      case ASIdOrRange_id:
+       if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) == NULL)
+         return 0;
+       BIO_printf(out, "%*s%s\n", indent + 2, "", s);
+       OPENSSL_free(s);
+       break;
+      case ASIdOrRange_range:
+       if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->min)) == NULL)
+         return 0;
+       BIO_printf(out, "%*s%s-", indent + 2, "", s);
+       OPENSSL_free(s);
+       if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL)
+         return 0;
+       BIO_printf(out, "%s\n", s);
+       OPENSSL_free(s);
+       break;
+      default:
+       return 0;
+      }
+    }
+    break;
+  default:
+    return 0;
+  }
+  return 1;
+}
+
+/*
+ * i2r method for an ASIdentifier extension.
+ */
+static int i2r_ASIdentifiers(X509V3_EXT_METHOD *method,
+                            void *ext,
+                            BIO *out,
+                            int indent)
+{
+  ASIdentifiers *asid = ext;
+  return (i2r_ASIdentifierChoice(out, asid->asnum, indent,
+                                "Autonomous System Numbers") &&
+         i2r_ASIdentifierChoice(out, asid->rdi, indent,
+                                "Routing Domain Identifiers"));
+}
+
+/*
+ * Sort comparision function for a sequence of ASIdOrRange elements.
+ */
+static int ASIdOrRange_cmp(const ASIdOrRange * const *a_,
+                          const ASIdOrRange * const *b_)
+{
+  const ASIdOrRange *a = *a_, *b = *b_;
+
+  assert((a->type == ASIdOrRange_id && a->u.id != NULL) ||
+        (a->type == ASIdOrRange_range && a->u.range != NULL &&
+         a->u.range->min != NULL && a->u.range->max != NULL));
+
+  assert((b->type == ASIdOrRange_id && b->u.id != NULL) ||
+        (b->type == ASIdOrRange_range && b->u.range != NULL &&
+         b->u.range->min != NULL && b->u.range->max != NULL));
+
+  if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id)
+    return ASN1_INTEGER_cmp(a->u.id, b->u.id);
+
+  if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) {
+    int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min);
+    return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max, b->u.range->max);
+  }
+
+  if (a->type == ASIdOrRange_id)
+    return ASN1_INTEGER_cmp(a->u.id, b->u.range->min);
+  else
+    return ASN1_INTEGER_cmp(a->u.range->min, b->u.id);
+}
+
+/*
+ * Add an inherit element.
+ */
+int v3_asid_add_inherit(ASIdentifiers *asid, int which)
+{
+  ASIdentifierChoice **choice;
+  if (asid == NULL)
+    return 0;
+  switch (which) {
+  case V3_ASID_ASNUM:
+    choice = &asid->asnum;
+    break;
+  case V3_ASID_RDI:
+    choice = &asid->rdi;
+    break;
+  default:
+    return 0;
+  }
+  if (*choice == NULL) {
+    if ((*choice = ASIdentifierChoice_new()) == NULL)
+      return 0;
+    assert((*choice)->u.inherit == NULL);
+    if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL)
+      return 0;
+    (*choice)->type = ASIdentifierChoice_inherit;
+  }
+  return (*choice)->type == ASIdentifierChoice_inherit;
+}
+
+/*
+ * Add an ID or range to an ASIdentifierChoice.
+ */
+int v3_asid_add_id_or_range(ASIdentifiers *asid,
+                           int which,
+                           ASN1_INTEGER *min,
+                           ASN1_INTEGER *max)
+{
+  ASIdentifierChoice **choice;
+  ASIdOrRange *aor;
+  if (asid == NULL)
+    return 0;
+  switch (which) {
+  case V3_ASID_ASNUM:
+    choice = &asid->asnum;
+    break;
+  case V3_ASID_RDI:
+    choice = &asid->rdi;
+    break;
+  default:
+    return 0;
+  }
+  if (*choice != NULL && (*choice)->type == ASIdentifierChoice_inherit)
+    return 0;
+  if (*choice == NULL) {
+    if ((*choice = ASIdentifierChoice_new()) == NULL)
+      return 0;
+    assert((*choice)->u.asIdsOrRanges == NULL);
+    (*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp);
+    if ((*choice)->u.asIdsOrRanges == NULL)
+      return 0;
+    (*choice)->type = ASIdentifierChoice_asIdsOrRanges;
+  }
+  if ((aor = ASIdOrRange_new()) == NULL)
+    return 0;
+  if (max == NULL) {
+    aor->type = ASIdOrRange_id;
+    aor->u.id = min;
+  } else {
+    aor->type = ASIdOrRange_range;
+    if ((aor->u.range = ASRange_new()) == NULL)
+      goto err;
+    ASN1_INTEGER_free(aor->u.range->min);
+    aor->u.range->min = min;
+    ASN1_INTEGER_free(aor->u.range->max);
+    aor->u.range->max = max;
+  }
+  if (!(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor)))
+    goto err;
+  return 1;
+
+ err:
+  ASIdOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Extract min and max values from an ASIdOrRange.
+ */
+static void extract_min_max(ASIdOrRange *aor,
+                           ASN1_INTEGER **min,
+                           ASN1_INTEGER **max)
+{
+  assert(aor != NULL && min != NULL && max != NULL);
+  switch (aor->type) {
+  case ASIdOrRange_id:
+    *min = aor->u.id;
+    *max = aor->u.id;
+    return;
+  case ASIdOrRange_range:
+    *min = aor->u.range->min;
+    *max = aor->u.range->max;
+    return;
+  }
+}
+
+/*
+ * Check whether an ASIdentifierChoice is in canonical form.
+ */
+static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
+{
+  ASN1_INTEGER *a_max_plus_one = NULL;
+  BIGNUM *bn = NULL;
+  int i, ret = 0;
+
+  /*
+   * Empty element or inheritance is canonical.
+   */
+  if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
+    return 1;
+
+  /*
+   * If not a list, or if empty list, it's broken.
+   */
+  if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
+      sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0)
+    return 0;
+
+  /*
+   * It's a list, check it.
+   */
+  for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
+    ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
+
+    extract_min_max(a, &a_min, &a_max);
+    extract_min_max(b, &b_min, &b_max);
+
+    /*
+     * Punt misordered list, overlapping start, or inverted range.
+     */
+    if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 ||
+       ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
+       ASN1_INTEGER_cmp(b_min, b_max) > 0)
+      goto done;
+
+    /*
+     * Calculate a_max + 1 to check for adjacency.
+     */
+    if ((bn == NULL && (bn = BN_new()) == NULL) ||
+       ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
+       !BN_add_word(bn, 1) ||
+       (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL,
+               ERR_R_MALLOC_FAILURE);
+      goto done;
+    }
+    
+    /*
+     * Punt if adjacent or overlapping.
+     */
+    if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0)
+      goto done;
+  }
+
+  ret = 1;
+
+ done:
+  ASN1_INTEGER_free(a_max_plus_one);
+  BN_free(bn);
+  return ret;
+}
+
+/*
+ * Check whether an ASIdentifier extension is in canonical form.
+ */
+int v3_asid_is_canonical(ASIdentifiers *asid)
+{
+  return (asid == NULL ||
+         (ASIdentifierChoice_is_canonical(asid->asnum) ||
+          ASIdentifierChoice_is_canonical(asid->rdi)));
+}
+
+/*
+ * Whack an ASIdentifierChoice into canonical form.
+ */
+static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
+{
+  ASN1_INTEGER *a_max_plus_one = NULL;
+  BIGNUM *bn = NULL;
+  int i, ret = 0;
+
+  /*
+   * Nothing to do for empty element or inheritance.
+   */
+  if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
+    return 1;
+
+  /*
+   * We have a list.  Sort it.
+   */
+  assert(choice->type == ASIdentifierChoice_asIdsOrRanges);
+  sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
+
+  /*
+   * Now check for errors and suboptimal encoding, rejecting the
+   * former and fixing the latter.
+   */
+  for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
+    ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
+
+    extract_min_max(a, &a_min, &a_max);
+    extract_min_max(b, &b_min, &b_max);
+
+    /*
+     * Make sure we're properly sorted (paranoia).
+     */
+    assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
+
+    /*
+     * Check for overlaps.
+     */
+    if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+               X509V3_R_EXTENSION_VALUE_ERROR);
+      goto done;
+    }
+
+    /*
+     * Calculate a_max + 1 to check for adjacency.
+     */
+    if ((bn == NULL && (bn = BN_new()) == NULL) ||
+       ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
+       !BN_add_word(bn, 1) ||
+       (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE, ERR_R_MALLOC_FAILURE);
+      goto done;
+    }
+    
+    /*
+     * If a and b are adjacent, merge them.
+     */
+    if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) {
+      ASRange *r;
+      switch (a->type) {
+      case ASIdOrRange_id:
+       if ((r = OPENSSL_malloc(sizeof(ASRange))) == NULL) {
+         X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+                   ERR_R_MALLOC_FAILURE);
+         goto done;
+       }
+       r->min = a_min;
+       r->max = b_max;
+       a->type = ASIdOrRange_range;
+       a->u.range = r;
+       break;
+      case ASIdOrRange_range:
+       ASN1_INTEGER_free(a->u.range->max);
+       a->u.range->max = b_max;
+       break;
+      }
+      switch (b->type) {
+      case ASIdOrRange_id:
+       b->u.id = NULL;
+       break;
+      case ASIdOrRange_range:
+       b->u.range->max = NULL;
+       break;
+      }
+      ASIdOrRange_free(b);
+      sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
+      i--;
+      continue;
+    }
+  }
+
+  assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
+
+  ret = 1;
+
+ done:
+  ASN1_INTEGER_free(a_max_plus_one);
+  BN_free(bn);
+  return ret;
+}
+
+/*
+ * Whack an ASIdentifier extension into canonical form.
+ */
+int v3_asid_canonize(ASIdentifiers *asid)
+{
+  return (asid == NULL ||
+         (ASIdentifierChoice_canonize(asid->asnum) &&
+          ASIdentifierChoice_canonize(asid->rdi)));
+}
+
+/*
+ * v2i method for an ASIdentifier extension.
+ */
+static void *v2i_ASIdentifiers(struct v3_ext_method *method,
+                              struct v3_ext_ctx *ctx,
+                              STACK_OF(CONF_VALUE) *values)
+{
+  ASIdentifiers *asid = NULL;
+  int i;
+
+  if ((asid = ASIdentifiers_new()) == NULL) {
+    X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+    return NULL;
+  }
+
+  for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
+    CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
+    ASN1_INTEGER *min = NULL, *max = NULL;
+    int i1, i2, i3, is_range, which;
+
+    /*
+     * Figure out whether this is an AS or an RDI.
+     */
+    if (       !name_cmp(val->name, "AS")) {
+      which = V3_ASID_ASNUM;
+    } else if (!name_cmp(val->name, "RDI")) {
+      which = V3_ASID_RDI;
+    } else {
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_EXTENSION_NAME_ERROR);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    /*
+     * Handle inheritance.
+     */
+    if (!strcmp(val->value, "inherit")) {
+      if (v3_asid_add_inherit(asid, which))
+       continue;
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_INHERITANCE);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    /*
+     * Number, range, or mistake, pick it apart and figure out which.
+     */
+    i1 = strspn(val->value, "0123456789");
+    if (val->value[i1] == '\0') {
+      is_range = 0;
+    } else {
+      is_range = 1;
+      i2 = i1 + strspn(val->value + i1, " \t");
+      if (val->value[i2] != '-') {
+       X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASNUMBER);
+       X509V3_conf_err(val);
+       goto err;
+      }
+      i2++;
+      i2 = i2 + strspn(val->value + i2, " \t");
+      i3 = i2 + strspn(val->value + i2, "0123456789");
+      if (val->value[i3] != '\0') {
+       X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASRANGE);
+       X509V3_conf_err(val);
+       goto err;
+      }
+    }
+
+    /*
+     * Syntax is ok, read and add it.
+     */
+    if (!is_range) {
+      if (!X509V3_get_value_int(val, &min)) {
+       X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+    } else {
+      char *s = BUF_strdup(val->value);
+      if (s == NULL) {
+       X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+      s[i1] = '\0';
+      min = s2i_ASN1_INTEGER(NULL, s);
+      max = s2i_ASN1_INTEGER(NULL, s + i2);
+      OPENSSL_free(s);
+      if (min == NULL || max == NULL) {
+       ASN1_INTEGER_free(min);
+       ASN1_INTEGER_free(max);
+       X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+       goto err;
+      }
+    }
+    if (!v3_asid_add_id_or_range(asid, which, min, max)) {
+      ASN1_INTEGER_free(min);
+      ASN1_INTEGER_free(max);
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+      goto err;
+    }
+  }
+
+  /*
+   * Canonize the result, then we're done.
+   */
+  if (!v3_asid_canonize(asid))
+    goto err;
+  return asid;
+
+ err:
+  ASIdentifiers_free(asid);
+  return NULL;
+}
+
+/*
+ * OpenSSL dispatch.
+ */
+X509V3_EXT_METHOD v3_asid = {
+  NID_sbgp_autonomousSysNum,   /* nid */
+  0,                           /* flags */
+  ASN1_ITEM_ref(ASIdentifiers),        /* template */
+  0, 0, 0, 0,                  /* old functions, ignored */
+  0,                           /* i2s */
+  0,                           /* s2i */
+  0,                           /* i2v */
+  v2i_ASIdentifiers,           /* v2i */
+  i2r_ASIdentifiers,           /* i2r */
+  0,                           /* r2i */
+  NULL                         /* extension-specific data */
+};
+
+/*
+ * Figure out whether extension uses inheritance.
+ */
+int v3_asid_inherits(ASIdentifiers *asid)
+{
+  return (asid != NULL &&
+         ((asid->asnum != NULL &&
+           asid->asnum->type == ASIdentifierChoice_inherit) ||
+          (asid->rdi != NULL &&
+           asid->rdi->type == ASIdentifierChoice_inherit)));
+}
+
+/*
+ * Figure out whether parent contains child.
+ */
+static int asid_contains(ASIdOrRanges *parent, ASIdOrRanges *child)
+{
+  ASN1_INTEGER *p_min, *p_max, *c_min, *c_max;
+  int p, c;
+
+  if (child == NULL || parent == child)
+    return 1;
+  if (parent == NULL)
+    return 0;
+
+  p = 0;
+  for (c = 0; c < sk_ASIdOrRange_num(child); c++) {
+    extract_min_max(sk_ASIdOrRange_value(child, c), &c_min, &c_max);
+    for (;; p++) {
+      if (p >= sk_ASIdOrRange_num(parent))
+       return 0;
+      extract_min_max(sk_ASIdOrRange_value(parent, p), &p_min, &p_max);
+      if (ASN1_INTEGER_cmp(p_max, c_max) < 0)
+       continue;
+      if (ASN1_INTEGER_cmp(p_min, c_min) > 0)
+       return 0;
+      break;
+    }
+  }
+
+  return 1;
+}
+
+/*
+ * Test whether a is a subet of b.
+ */
+int v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b)
+{
+  return (a == NULL ||
+         a == b ||
+         (b != NULL &&
+          !v3_asid_inherits(a) &&
+          !v3_asid_inherits(b) &&
+          asid_contains(b->asnum->u.asIdsOrRanges,
+                        a->asnum->u.asIdsOrRanges) &&
+          asid_contains(b->rdi->u.asIdsOrRanges,
+                        a->rdi->u.asIdsOrRanges)));
+}
+
+/*
+ * Validation error handling via callback.
+ */
+#define validation_err(_err_)          \
+  do {                                 \
+    if (ctx != NULL) {                 \
+      ctx->error = _err_;              \
+      ctx->error_depth = i;            \
+      ctx->current_cert = x;           \
+      ret = ctx->verify_cb(0, ctx);    \
+    } else {                           \
+      ret = 0;                         \
+    }                                  \
+    if (!ret)                          \
+      goto done;                       \
+  } while (0)
+
+/*
+ * Core code for RFC 3779 3.3 path validation.
+ */
+static int v3_asid_validate_path_internal(X509_STORE_CTX *ctx,
+                                         STACK_OF(X509) *chain,
+                                         ASIdentifiers *ext)
+{
+  ASIdOrRanges *child_as = NULL, *child_rdi = NULL;
+  int i, ret = 1, inherit_as = 0, inherit_rdi = 0;
+  X509 *x;
+
+  assert(chain != NULL && sk_X509_num(chain) > 0);
+  assert(ctx != NULL || ext != NULL);
+  assert(ctx == NULL || ctx->verify_cb != NULL);
+
+  /*
+   * Figure out where to start.  If we don't have an extension to
+   * check, we're done.  Otherwise, check canonical form and
+   * set up for walking up the chain.
+   */
+  if (ext != NULL) {
+    i = -1;
+    x = NULL;
+  } else {
+    i = 0;
+    x = sk_X509_value(chain, i);
+    assert(x != NULL);
+    if ((ext = x->rfc3779_asid) == NULL)
+      goto done;
+  }
+  if (!v3_asid_is_canonical(ext))
+    validation_err(X509_V_ERR_INVALID_EXTENSION);
+  if (ext->asnum != NULL)  {
+    switch (ext->asnum->type) {
+    case ASIdentifierChoice_inherit:
+      inherit_as = 1;
+      break;
+    case ASIdentifierChoice_asIdsOrRanges:
+      child_as = ext->asnum->u.asIdsOrRanges;
+      break;
+    }
+  }
+  if (ext->rdi != NULL) {
+    switch (ext->rdi->type) {
+    case ASIdentifierChoice_inherit:
+      inherit_rdi = 1;
+      break;
+    case ASIdentifierChoice_asIdsOrRanges:
+      child_rdi = ext->rdi->u.asIdsOrRanges;
+      break;
+    }
+  }
+
+  /*
+   * Now walk up the chain.  Extensions must be in canonical form, no
+   * cert may list resources that its parent doesn't list.
+   */
+  for (i++; i < sk_X509_num(chain); i++) {
+    x = sk_X509_value(chain, i);
+    assert(x != NULL);
+    if (x->rfc3779_asid == NULL) {
+      if (child_as != NULL || child_rdi != NULL)
+       validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      continue;
+    }
+    if (!v3_asid_is_canonical(x->rfc3779_asid))
+      validation_err(X509_V_ERR_INVALID_EXTENSION);
+    if (x->rfc3779_asid->asnum == NULL && child_as != NULL) {
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      child_as = NULL;
+      inherit_as = 0;
+    }
+    if (x->rfc3779_asid->asnum != NULL &&
+       x->rfc3779_asid->asnum->type == ASIdentifierChoice_asIdsOrRanges) {
+      if (inherit_as ||
+         asid_contains(x->rfc3779_asid->asnum->u.asIdsOrRanges, child_as)) {
+       child_as = x->rfc3779_asid->asnum->u.asIdsOrRanges;
+       inherit_as = 0;
+      } else {
+       validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      }
+    }
+    if (x->rfc3779_asid->rdi == NULL && child_rdi != NULL) {
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      child_rdi = NULL;
+      inherit_rdi = 0;
+    }
+    if (x->rfc3779_asid->rdi != NULL &&
+       x->rfc3779_asid->rdi->type == ASIdentifierChoice_asIdsOrRanges) {
+      if (inherit_rdi ||
+         asid_contains(x->rfc3779_asid->rdi->u.asIdsOrRanges, child_rdi)) {
+       child_rdi = x->rfc3779_asid->rdi->u.asIdsOrRanges;
+       inherit_rdi = 0;
+      } else {
+       validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      }
+    }
+  }
+
+  /*
+   * Trust anchor can't inherit.
+   */
+  assert(x != NULL);
+  if (x->rfc3779_asid != NULL) {
+    if (x->rfc3779_asid->asnum != NULL &&
+       x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit)
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+    if (x->rfc3779_asid->rdi != NULL &&
+       x->rfc3779_asid->rdi->type == ASIdentifierChoice_inherit)
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+  }
+
+ done:
+  return ret;
+}
+
+#undef validation_err
+
+/*
+ * RFC 3779 3.3 path validation -- called from X509_verify_cert().
+ */
+int v3_asid_validate_path(X509_STORE_CTX *ctx)
+{
+  return v3_asid_validate_path_internal(ctx, ctx->chain, NULL);
+}
+
+/*
+ * RFC 3779 3.3 path validation of an extension.
+ * Test whether chain covers extension.
+ */
+int v3_asid_validate_resource_set(STACK_OF(X509) *chain,
+                                 ASIdentifiers *ext,
+                                 int allow_inheritance)
+{
+  if (ext == NULL)
+    return 1;
+  if (chain == NULL || sk_X509_num(chain) == 0)
+    return 0;
+  if (!allow_inheritance && v3_asid_inherits(ext))
+    return 0;
+  return v3_asid_validate_path_internal(NULL, chain, ext);
+}
+
+#endif /* OPENSSL_RFC3779 */
index 47b7e0f..9d0dd70 100644 (file)
@@ -287,7 +287,12 @@ int X509_supported_extension(X509_EXTENSION *ex)
                NID_key_usage,          /* 83 */
                NID_subject_alt_name,   /* 85 */
                NID_basic_constraints,  /* 87 */
+               NID_certificate_policies, /* 89 */
                NID_ext_key_usage,      /* 126 */
+#ifdef OPENSSL_RFC3779
+               NID_sbgp_ipAddrBlock,   /* 290 */
+               NID_sbgp_autonomousSysNum, /* 291 */
+#endif
                NID_proxyCertInfo       /* 661 */
        };
 
@@ -413,6 +418,11 @@ static void x509v3_cache_extensions(X509 *x)
        x->skid =X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
        x->akid =X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
        x->crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL);
+#ifdef OPENSSL_RFC3779
+       x->rfc3779_addr =X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, NULL, NULL);
+       x->rfc3779_asid =X509_get_ext_d2i(x, NID_sbgp_autonomousSysNum,
+                                         NULL, NULL);
+#endif
        for (i = 0; i < X509_get_ext_count(x); i++)
                {
                ex = X509_get_ext(x, i);
index 7911c4b..7c1d26f 100644 (file)
@@ -71,7 +71,6 @@ static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
 static void str_free(void *str);
 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
 
-static int a2i_ipadd(unsigned char *ipout, const char *ipasc);
 static int ipv4_from_asc(unsigned char *v4, const char *in);
 static int ipv6_from_asc(unsigned char *v6, const char *in);
 static int ipv6_cb(const char *elem, int len, void *usr);
@@ -615,7 +614,7 @@ ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
        }
        
 
-static int a2i_ipadd(unsigned char *ipout, const char *ipasc)
+int a2i_ipadd(unsigned char *ipout, const char *ipasc)
        {
        /* If string contains a ':' assume IPv6 */
 
index 836a324..c50266b 100644 (file)
@@ -70,6 +70,8 @@
 
 static ERR_STRING_DATA X509V3_str_functs[]=
        {
+{ERR_FUNC(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE),       "ASIDENTIFIERCHOICE_CANONIZE"},
+{ERR_FUNC(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL),   "ASIDENTIFIERCHOICE_IS_CANONICAL"},
 {ERR_FUNC(X509V3_F_COPY_EMAIL),        "COPY_EMAIL"},
 {ERR_FUNC(X509V3_F_COPY_ISSUER),       "COPY_ISSUER"},
 {ERR_FUNC(X509V3_F_DO_DIRNAME),        "DO_DIRNAME"},
@@ -101,6 +103,7 @@ static ERR_STRING_DATA X509V3_str_functs[]=
 {ERR_FUNC(X509V3_F_SXNET_ADD_ID_ULONG),        "SXNET_add_id_ulong"},
 {ERR_FUNC(X509V3_F_SXNET_GET_ID_ASC),  "SXNET_get_id_asc"},
 {ERR_FUNC(X509V3_F_SXNET_GET_ID_ULONG),        "SXNET_get_id_ulong"},
+{ERR_FUNC(X509V3_F_V2I_ASIDENTIFIERS), "V2I_ASIDENTIFIERS"},
 {ERR_FUNC(X509V3_F_V2I_ASN1_BIT_STRING),       "v2i_ASN1_BIT_STRING"},
 {ERR_FUNC(X509V3_F_V2I_AUTHORITY_INFO_ACCESS), "V2I_AUTHORITY_INFO_ACCESS"},
 {ERR_FUNC(X509V3_F_V2I_AUTHORITY_KEYID),       "V2I_AUTHORITY_KEYID"},
@@ -110,11 +113,13 @@ static ERR_STRING_DATA X509V3_str_functs[]=
 {ERR_FUNC(X509V3_F_V2I_GENERAL_NAMES), "v2i_GENERAL_NAMES"},
 {ERR_FUNC(X509V3_F_V2I_GENERAL_NAME_EX),       "v2i_GENERAL_NAME_ex"},
 {ERR_FUNC(X509V3_F_V2I_IDP),   "V2I_IDP"},
+{ERR_FUNC(X509V3_F_V2I_IPADDRBLOCKS),  "V2I_IPADDRBLOCKS"},
 {ERR_FUNC(X509V3_F_V2I_ISSUER_ALT),    "V2I_ISSUER_ALT"},
 {ERR_FUNC(X509V3_F_V2I_NAME_CONSTRAINTS),      "V2I_NAME_CONSTRAINTS"},
 {ERR_FUNC(X509V3_F_V2I_POLICY_CONSTRAINTS),    "V2I_POLICY_CONSTRAINTS"},
 {ERR_FUNC(X509V3_F_V2I_POLICY_MAPPINGS),       "V2I_POLICY_MAPPINGS"},
 {ERR_FUNC(X509V3_F_V2I_SUBJECT_ALT),   "V2I_SUBJECT_ALT"},
+{ERR_FUNC(X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL),    "V3_ADDR_VALIDATE_PATH_INTERNAL"},
 {ERR_FUNC(X509V3_F_V3_GENERIC_EXTENSION),      "V3_GENERIC_EXTENSION"},
 {ERR_FUNC(X509V3_F_X509V3_ADD1_I2D),   "X509V3_add1_i2d"},
 {ERR_FUNC(X509V3_F_X509V3_ADD_VALUE),  "X509V3_add_value"},
@@ -154,8 +159,12 @@ static ERR_STRING_DATA X509V3_str_reasons[]=
 {ERR_REASON(X509V3_R_ILLEGAL_HEX_DIGIT)  ,"illegal hex digit"},
 {ERR_REASON(X509V3_R_INCORRECT_POLICY_SYNTAX_TAG),"incorrect policy syntax tag"},
 {ERR_REASON(X509V3_R_INVAID_MULTIPLE_RDNS),"invaid multiple rdns"},
+{ERR_REASON(X509V3_R_INVALID_ASNUMBER)   ,"invalid asnumber"},
+{ERR_REASON(X509V3_R_INVALID_ASRANGE)    ,"invalid asrange"},
 {ERR_REASON(X509V3_R_INVALID_BOOLEAN_STRING),"invalid boolean string"},
 {ERR_REASON(X509V3_R_INVALID_EXTENSION_STRING),"invalid extension string"},
+{ERR_REASON(X509V3_R_INVALID_INHERITANCE),"invalid inheritance"},
+{ERR_REASON(X509V3_R_INVALID_IPADDRESS)  ,"invalid ipaddress"},
 {ERR_REASON(X509V3_R_INVALID_NAME)       ,"invalid name"},
 {ERR_REASON(X509V3_R_INVALID_NULL_ARGUMENT),"invalid null argument"},
 {ERR_REASON(X509V3_R_INVALID_NULL_NAME)  ,"invalid null name"},
@@ -167,6 +176,7 @@ static ERR_STRING_DATA X509V3_str_reasons[]=
 {ERR_REASON(X509V3_R_INVALID_POLICY_IDENTIFIER),"invalid policy identifier"},
 {ERR_REASON(X509V3_R_INVALID_PROXY_POLICY_SETTING),"invalid proxy policy setting"},
 {ERR_REASON(X509V3_R_INVALID_PURPOSE)    ,"invalid purpose"},
+{ERR_REASON(X509V3_R_INVALID_SAFI)       ,"invalid safi"},
 {ERR_REASON(X509V3_R_INVALID_SECTION)    ,"invalid section"},
 {ERR_REASON(X509V3_R_INVALID_SYNTAX)     ,"invalid syntax"},
 {ERR_REASON(X509V3_R_ISSUER_DECODE_ERROR),"issuer decode error"},
index 26884d4..763a0d5 100644 (file)
@@ -652,11 +652,161 @@ void X509_email_free(STACK *sk);
 
 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc);
 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc);
+int a2i_ipadd(unsigned char *ipout, const char *ipasc);
 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
                                                unsigned long chtype);
 
 void X509_POLICY_NODE_print(BIO *out, X509_POLICY_NODE *node, int indent);
 
+#ifdef OPENSSL_RFC3779
+
+typedef struct ASRange_st {
+  ASN1_INTEGER *min, *max;
+} ASRange;
+
+#define        ASIdOrRange_id          0
+#define        ASIdOrRange_range       1
+
+typedef struct ASIdOrRange_st {
+  int type;
+  union {
+    ASN1_INTEGER *id;
+    ASRange      *range;
+  } u;
+} ASIdOrRange;
+
+typedef STACK_OF(ASIdOrRange) ASIdOrRanges;
+DECLARE_STACK_OF(ASIdOrRange)
+
+#define        ASIdentifierChoice_inherit              0
+#define        ASIdentifierChoice_asIdsOrRanges        1
+
+typedef struct ASIdentifierChoice_st {
+  int type;
+  union {
+    ASN1_NULL    *inherit;
+    ASIdOrRanges *asIdsOrRanges;
+  } u;
+} ASIdentifierChoice;
+
+typedef struct ASIdentifiers_st {
+  ASIdentifierChoice *asnum, *rdi;
+} ASIdentifiers;
+
+DECLARE_ASN1_FUNCTIONS(ASRange)
+DECLARE_ASN1_FUNCTIONS(ASIdOrRange)
+DECLARE_ASN1_FUNCTIONS(ASIdentifierChoice)
+DECLARE_ASN1_FUNCTIONS(ASIdentifiers)
+
+
+typedef struct IPAddressRange_st {
+  ASN1_BIT_STRING      *min, *max;
+} IPAddressRange;
+
+#define        IPAddressOrRange_addressPrefix  0
+#define        IPAddressOrRange_addressRange   1
+
+typedef struct IPAddressOrRange_st {
+  int type;
+  union {
+    ASN1_BIT_STRING    *addressPrefix;
+    IPAddressRange     *addressRange;
+  } u;
+} IPAddressOrRange;
+
+typedef STACK_OF(IPAddressOrRange) IPAddressOrRanges;
+DECLARE_STACK_OF(IPAddressOrRange)
+
+#define        IPAddressChoice_inherit                 0
+#define        IPAddressChoice_addressesOrRanges       1
+
+typedef struct IPAddressChoice_st {
+  int type;
+  union {
+    ASN1_NULL          *inherit;
+    IPAddressOrRanges  *addressesOrRanges;
+  } u;
+} IPAddressChoice;
+
+typedef struct IPAddressFamily_st {
+  ASN1_OCTET_STRING    *addressFamily;
+  IPAddressChoice      *ipAddressChoice;
+} IPAddressFamily;
+
+typedef STACK_OF(IPAddressFamily) IPAddrBlocks;
+DECLARE_STACK_OF(IPAddressFamily)
+
+DECLARE_ASN1_FUNCTIONS(IPAddressRange)
+DECLARE_ASN1_FUNCTIONS(IPAddressOrRange)
+DECLARE_ASN1_FUNCTIONS(IPAddressChoice)
+DECLARE_ASN1_FUNCTIONS(IPAddressFamily)
+
+/*
+ * API tag for elements of the ASIdentifer SEQUENCE.
+ */
+#define        V3_ASID_ASNUM   0
+#define        V3_ASID_RDI     1
+
+/*
+ * AFI values, assigned by IANA.  It'd be nice to make the AFI
+ * handling code totally generic, but there are too many little things
+ * that would need to be defined for other address families for it to
+ * be worth the trouble.
+ */
+#define        IANA_AFI_IPV4   1
+#define        IANA_AFI_IPV6   2
+
+/*
+ * Utilities to construct and extract values from RFC3779 extensions,
+ * since some of the encodings (particularly for IP address prefixes
+ * and ranges) are a bit tedious to work with directly.
+ */
+int v3_asid_add_inherit(ASIdentifiers *asid, int which);
+int v3_asid_add_id_or_range(ASIdentifiers *asid, int which,
+                           ASN1_INTEGER *min, ASN1_INTEGER *max);
+int v3_addr_add_inherit(IPAddrBlocks *addr,
+                       const unsigned afi, const unsigned *safi);
+int v3_addr_add_prefix(IPAddrBlocks *addr,
+                      const unsigned afi, const unsigned *safi,
+                      unsigned char *a, const int prefixlen);
+int v3_addr_add_range(IPAddrBlocks *addr,
+                     const unsigned afi, const unsigned *safi,
+                     unsigned char *min, unsigned char *max);
+unsigned v3_addr_get_afi(const IPAddressFamily *f);
+int v3_addr_get_range(IPAddressOrRange *aor, const unsigned afi,
+                     unsigned char *min, unsigned char *max,
+                     const int length);
+
+/*
+ * Canonical forms.
+ */
+int v3_asid_is_canonical(ASIdentifiers *asid);
+int v3_addr_is_canonical(IPAddrBlocks *addr);
+int v3_asid_canonize(ASIdentifiers *asid);
+int v3_addr_canonize(IPAddrBlocks *addr);
+
+/*
+ * Tests for inheritance and containment.
+ */
+int v3_asid_inherits(ASIdentifiers *asid);
+int v3_addr_inherits(IPAddrBlocks *addr);
+int v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b);
+int v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b);
+
+/*
+ * Check whether RFC 3779 extensions nest properly in chains.
+ */
+int v3_asid_validate_path(X509_STORE_CTX *);
+int v3_addr_validate_path(X509_STORE_CTX *);
+int v3_asid_validate_resource_set(STACK_OF(X509) *chain,
+                                 ASIdentifiers *ext,
+                                 int allow_inheritance);
+int v3_addr_validate_resource_set(STACK_OF(X509) *chain,
+                                 IPAddrBlocks *ext,
+                                 int allow_inheritance);
+
+#endif /* OPENSSL_RFC3779 */
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
@@ -666,6 +816,8 @@ void ERR_load_X509V3_strings(void);
 /* Error codes for the X509V3 functions. */
 
 /* Function codes. */
+#define X509V3_F_ASIDENTIFIERCHOICE_CANONIZE            161
+#define X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL        162
 #define X509V3_F_COPY_EMAIL                             122
 #define X509V3_F_COPY_ISSUER                            123
 #define X509V3_F_DO_DIRNAME                             144
@@ -697,6 +849,7 @@ void ERR_load_X509V3_strings(void);
 #define X509V3_F_SXNET_ADD_ID_ULONG                     127
 #define X509V3_F_SXNET_GET_ID_ASC                       128
 #define X509V3_F_SXNET_GET_ID_ULONG                     129
+#define X509V3_F_V2I_ASIDENTIFIERS                      163
 #define X509V3_F_V2I_ASN1_BIT_STRING                    101
 #define X509V3_F_V2I_AUTHORITY_INFO_ACCESS              139
 #define X509V3_F_V2I_AUTHORITY_KEYID                    119
@@ -706,11 +859,13 @@ void ERR_load_X509V3_strings(void);
 #define X509V3_F_V2I_GENERAL_NAMES                      118
 #define X509V3_F_V2I_GENERAL_NAME_EX                    117
 #define X509V3_F_V2I_IDP                                157
+#define X509V3_F_V2I_IPADDRBLOCKS                       159
 #define X509V3_F_V2I_ISSUER_ALT                                 153
 #define X509V3_F_V2I_NAME_CONSTRAINTS                   147
 #define X509V3_F_V2I_POLICY_CONSTRAINTS                         146
 #define X509V3_F_V2I_POLICY_MAPPINGS                    145
 #define X509V3_F_V2I_SUBJECT_ALT                        154
+#define X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL                 160
 #define X509V3_F_V3_GENERIC_EXTENSION                   116
 #define X509V3_F_X509V3_ADD1_I2D                        140
 #define X509V3_F_X509V3_ADD_VALUE                       105
@@ -747,8 +902,12 @@ void ERR_load_X509V3_strings(void);
 #define X509V3_R_ILLEGAL_HEX_DIGIT                      113
 #define X509V3_R_INCORRECT_POLICY_SYNTAX_TAG            152
 #define X509V3_R_INVAID_MULTIPLE_RDNS                   161
+#define X509V3_R_INVALID_ASNUMBER                       162
+#define X509V3_R_INVALID_ASRANGE                        163
 #define X509V3_R_INVALID_BOOLEAN_STRING                         104
 #define X509V3_R_INVALID_EXTENSION_STRING               105
+#define X509V3_R_INVALID_INHERITANCE                    165
+#define X509V3_R_INVALID_IPADDRESS                      166
 #define X509V3_R_INVALID_NAME                           106
 #define X509V3_R_INVALID_NULL_ARGUMENT                  107
 #define X509V3_R_INVALID_NULL_NAME                      108
@@ -760,6 +919,7 @@ void ERR_load_X509V3_strings(void);
 #define X509V3_R_INVALID_POLICY_IDENTIFIER              134
 #define X509V3_R_INVALID_PROXY_POLICY_SETTING           153
 #define X509V3_R_INVALID_PURPOSE                        146
+#define X509V3_R_INVALID_SAFI                           164
 #define X509V3_R_INVALID_SECTION                        135
 #define X509V3_R_INVALID_SYNTAX                                 143
 #define X509V3_R_ISSUER_DECODE_ERROR                    126