PR: 2909
authorDr. Stephen Henson <steve@openssl.org>
Sun, 18 Nov 2012 15:13:55 +0000 (15:13 +0000)
committerDr. Stephen Henson <steve@openssl.org>
Sun, 18 Nov 2012 15:13:55 +0000 (15:13 +0000)
Contributed by: Florian Weimer <fweimer@redhat.com>

Fixes to X509 hostname and email address checking. Wildcard matching support.
New test program and manual page.

CHANGES
crypto/x509v3/Makefile
crypto/x509v3/v3_utl.c
crypto/x509v3/v3nametest.c [new file with mode: 0644]
crypto/x509v3/x509v3.h
doc/crypto/X509_check_host.pod [new file with mode: 0644]
test/Makefile

diff --git a/CHANGES b/CHANGES
index cbdf33d..6e4eaae 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,10 @@
 
  Changes between 1.0.x and 1.1.0  [xx XXX xxxx]
 
+  *) Fixes and wildcard matching support to hostname and email checking
+     functions. Add manual page.
+     [Florian Weimer (Red Hat Product Security Team)]
+
   *) New experimental SSL_CONF* functions. These provide a common framework
      for application configuration using configuration files or command lines.
      [Steve Henson]
index 07e2df4..b54f540 100644 (file)
@@ -13,7 +13,7 @@ AR=           ar r
 CFLAGS= $(INCLUDES) $(CFLAG)
 
 GENERAL=Makefile README
-TEST=
+TEST=v3nametest.c
 APPS=
 
 LIB=$(TOP)/libcrypto.a
index db9f05e..ffd9f0d 100644 (file)
@@ -568,12 +568,177 @@ void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
        sk_OPENSSL_STRING_pop_free(sk, str_free);
 }
 
+typedef int (*equal_fn)(const unsigned char *pattern, size_t pattern_len,
+                       const unsigned char *subject, size_t subject_len);
+
+/* Compare while ASCII ignoring case. */
+static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
+                       const unsigned char *subject, size_t subject_len)
+       {
+       if (pattern_len != subject_len)
+               return 0;
+       while (pattern_len)
+               {
+               unsigned char l = *pattern;
+               unsigned char r = *subject;
+               /* The pattern must not contain NUL characters. */
+               if (l == 0)
+                       return 0;
+               if (l != r)
+                       {
+                       if ('A' <= l && l <= 'Z')
+                               l = (l - 'A') + 'a';
+                       if ('A' <= r && r <= 'Z')
+                               r = (r - 'A') + 'a';
+                       if (l != r)
+                               return 0;
+                       }
+               ++pattern;
+               ++subject;
+               --pattern_len;
+               }
+       return 1;
+       }
+
+/* Compare using memcmp. */
+static int equal_case(const unsigned char *pattern, size_t pattern_len,
+                     const unsigned char *subject, size_t subject_len)
+{
+       /* The pattern must not contain NUL characters. */
+       if (memchr(pattern, '\0', pattern_len) != NULL)
+               return 0;
+       if (pattern_len != subject_len)
+               return 0;
+       return !memcmp(pattern, subject, pattern_len);
+}
+
+/* RFC 5280, section 7.5, requires that only the domain is compared in
+   a case-insensitive manner. */
+static int equal_email(const unsigned char *a, size_t a_len,
+                      const unsigned char *b, size_t b_len)
+       {
+       size_t i = a_len;
+       if (a_len != b_len)
+               return 0;
+       /* We search backwards for the '@' character, so that we do
+          not have to deal with quoted local-parts.  The domain part
+          is compared in a case-insensitive manner. */
+       while (i > 0)
+               {
+               --i;
+               if (a[i] == '@' || b[i] == '@')
+                       {
+                       if (!equal_nocase(a + i, a_len - i,
+                                         b + i, a_len - i))
+                               return 0;
+                       break;
+                       }
+               }
+       if (i == 0)
+               i = a_len;
+       return equal_case(a, i, b, i);
+       }
+
+/* Compare the prefix and suffix with the subject, and check that the
+   characters in-between are valid. */
+static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
+                         const unsigned char *suffix, size_t suffix_len,
+                         const unsigned char *subject, size_t subject_len)
+       {
+       const unsigned char *wildcard_start;
+       const unsigned char *wildcard_end;
+       const unsigned char *p;
+       if (subject_len < prefix_len + suffix_len)
+               return 0;
+       if (!equal_nocase(prefix, prefix_len, subject, prefix_len))
+               return 0;
+       wildcard_start = subject + prefix_len;
+       wildcard_end = subject + (subject_len - suffix_len);
+       if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len))
+               return 0;
+       /* The wildcard must match at least one character. */
+       if (wildcard_start == wildcard_end)
+               return 0;
+       /* Check that the part matched by the wildcard contains only
+          permitted characters and only matches a single label. */
+       for (p = wildcard_start; p != wildcard_end; ++p)
+               if (!(('0' <= *p && *p <= '9') ||
+                     ('A' <= *p && *p <= 'Z') ||
+                     ('a' <= *p && *p <= 'z') ||
+                     *p == '-'))
+                       return 0;
+       return 1;
+       }
+
+/* Checks if the memory region consistens of [0-9A-Za-z.-]. */
+static int valid_domain_characters(const unsigned char *p, size_t len)
+       {
+       while (len)
+               {
+               if (!(('0' <= *p && *p <= '9') ||
+                     ('A' <= *p && *p <= 'Z') ||
+                     ('a' <= *p && *p <= 'z') ||
+                     *p == '-' || *p == '.'))
+                       return 0;
+               ++p;
+               --len;
+               }
+       return 1;
+       }
+
+/* Find the '*' in a wildcard pattern.  If no such character is found
+   or the pattern is otherwise invalid, returns NULL. */
+static const unsigned char *wildcard_find_star(const unsigned char *pattern,
+                                              size_t pattern_len)
+       {
+       const unsigned char *star = memchr(pattern, '*', pattern_len);
+       size_t dot_count = 0;
+       const unsigned char *suffix_start;
+       size_t suffix_length;
+       if (star == NULL)
+               return NULL;
+       suffix_start = star + 1;
+       suffix_length = (pattern + pattern_len) - (star + 1);
+       if (!(valid_domain_characters(pattern, star - pattern) &&
+             valid_domain_characters(suffix_start, suffix_length)))
+               return NULL;
+       /* Check that the suffix matches at least two labels. */
+       while (suffix_length)
+               {
+               if (*suffix_start == '.')
+                       ++dot_count;
+               ++suffix_start;
+               --suffix_length;
+               }
+       if (dot_count < 2)
+               return NULL;
+       return star;
+       }
+
+/* Compare using wildcards. */
+static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
+                         const unsigned char *subject, size_t subject_len)
+       {
+       const unsigned char *star;
+       /* Do not match IDNA names. */
+       if (subject_len >=4 && memcmp(subject, "xn--", 4) == 0)
+               star = NULL;
+       else
+               star = wildcard_find_star(pattern, pattern_len);
+       if (star == NULL)
+               return equal_nocase(pattern, pattern_len,
+                                   subject, subject_len);
+       return wildcard_match(pattern, star - pattern,
+                             star + 1, (pattern + pattern_len) - star - 1,
+                             subject, subject_len);
+       }
+
 /* Compare an ASN1_STRING to a supplied string. If they match
  * return 1. If cmp_type > 0 only compare if string matches the
  * type, otherwise convert it to UTF8.
  */
 
-static int do_check_string(ASN1_STRING *a, int cmp_type,
+static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
                                const unsigned char *b, size_t blen)
        {
        if (!a->data || !a->length)
@@ -582,6 +747,8 @@ static int do_check_string(ASN1_STRING *a, int cmp_type,
                {
                if (cmp_type != a->type)
                        return 0;
+               if (cmp_type == V_ASN1_IA5STRING)
+                       return equal(a->data, a->length, b, blen);
                if (a->length == (int)blen && !memcmp(a->data, b, blen))
                        return 1;
                else
@@ -593,11 +760,8 @@ static int do_check_string(ASN1_STRING *a, int cmp_type,
                unsigned char *astr;
                astrlen = ASN1_STRING_to_UTF8(&astr, a);
                if (astrlen < 0)
-                       return 0;
-               if (astrlen == (int)blen && !memcmp(astr, b, blen))
-                       rv = 1;
-               else
-                       rv = 0;
+                       return -1;
+               rv = equal(astr, astrlen, b, blen);
                OPENSSL_free(astr);
                return rv;
                }
@@ -610,12 +774,29 @@ static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
        X509_NAME *name = NULL;
        int i;
        int cnid;
+       int alt_type;
+       equal_fn equal;
        if (check_type == GEN_EMAIL)
+               {
                cnid = NID_pkcs9_emailAddress;
+               alt_type = V_ASN1_IA5STRING;
+               equal = equal_email;
+               }
        else if (check_type == GEN_DNS)
+               {
                cnid = NID_commonName;
+               alt_type = V_ASN1_IA5STRING;
+               if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
+                       equal = equal_nocase;
+               else
+                       equal = equal_wildcard;
+               }
        else
+               {
                cnid = 0;
+               alt_type = V_ASN1_OCTET_STRING;
+               equal = equal_case;
+               }
 
        if (chklen == 0)
                chklen = strlen((const char *)chk);
@@ -624,11 +805,6 @@ static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
        if (gens)
                {
                int rv = 0;
-               int alt_type;
-               if (cnid)
-                       alt_type = V_ASN1_IA5STRING;
-               else
-                       alt_type = V_ASN1_OCTET_STRING;
                for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
                        {
                        GENERAL_NAME *gen;
@@ -642,7 +818,7 @@ static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
                                cstr = gen->d.dNSName;
                        else
                                cstr = gen->d.iPAddress;
-                       if (do_check_string(cstr, alt_type, chk, chklen))
+                       if (do_check_string(cstr, alt_type, equal, chk, chklen))
                                {
                                rv = 1;
                                break;
@@ -662,7 +838,7 @@ static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
                ASN1_STRING *str;
                ne = X509_NAME_get_entry(name, i);
                str = X509_NAME_ENTRY_get_data(ne);
-               if (do_check_string(str, -1, chk, chklen))
+               if (do_check_string(str, -1, equal, chk, chklen))
                        return 1;
                }
        return 0;
@@ -692,7 +868,7 @@ int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
        int iplen;
        iplen = a2i_ipadd(ipout, ipasc);
        if (iplen == 0)
-               return 0;
+               return -2;
        return do_x509_check(x, ipout, (size_t)iplen, flags, GEN_IPADD);
        }
 
diff --git a/crypto/x509v3/v3nametest.c b/crypto/x509v3/v3nametest.c
new file mode 100644 (file)
index 0000000..5bf1201
--- /dev/null
@@ -0,0 +1,346 @@
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <string.h>
+
+static const char *const names[] =
+       {
+       "a", "b", ".", "*", "@",
+       ".a", "a.", ".b", "b.", ".*", "*.", "*@", "@*", "a@", "@a", "b@", "..",
+       "@@", "**",
+       "*.com", "*com", "*.*.com", "*com", "com*", "*example.com",
+       "*@example.com", "test@*.example.com",
+       "example.com", "www.example.com", "test.www.example.com",
+       "*.example.com", "*.www.example.com", "test.*.example.com", "www.*.com",
+       "example.net", "xn--rger-koa.example.com",
+       "a.example.com", "b.example.com",
+       "postmaster@example.com", "Postmaster@example.com",
+       "postmaster@EXAMPLE.COM",
+       NULL
+       };
+
+static const char *const exceptions[] =
+       {
+       "set CN: host: [*.example.com] does not match [*.example.com]",
+       "set CN: host: [*.example.com] matches [a.example.com]",
+       "set CN: host: [*.example.com] matches [b.example.com]",
+       "set CN: host: [*.example.com] matches [www.example.com]",
+       "set CN: host: [test.*.example.com] does not match [test.*.example.com]",
+       "set CN: host: [test.*.example.com] matches [test.www.example.com]",
+       "set CN: host: [*.www.example.com] does not match [*.www.example.com]",
+       "set CN: host: [*.www.example.com] matches [test.www.example.com]",
+       "set emailAddress: email: [postmaster@example.com] does not match [Postmaster@example.com]",
+       "set emailAddress: email: [postmaster@EXAMPLE.COM] does not match [Postmaster@example.com]",
+       "set emailAddress: email: [Postmaster@example.com] does not match [postmaster@example.com]",
+       "set emailAddress: email: [Postmaster@example.com] does not match [postmaster@EXAMPLE.COM]",
+       "set dnsName: host: [*.example.com] matches [www.example.com]",
+       "set dnsName: host: [*.example.com] does not match [*.example.com]",
+       "set dnsName: host: [*.example.com] matches [a.example.com]",
+       "set dnsName: host: [*.example.com] matches [b.example.com]",
+       "set dnsName: host: [*.www.example.com] matches [test.www.example.com]",
+       "set dnsName: host: [*.www.example.com] does not match [*.www.example.com]",
+       "set dnsName: host: [test.*.example.com] matches [test.www.example.com]",
+       "set dnsName: host: [test.*.example.com] does not match [test.*.example.com]",
+       "set rfc822Name: email: [postmaster@example.com] does not match [Postmaster@example.com]",
+       "set rfc822Name: email: [Postmaster@example.com] does not match [postmaster@example.com]",
+       "set rfc822Name: email: [Postmaster@example.com] does not match [postmaster@EXAMPLE.COM]",
+       "set rfc822Name: email: [postmaster@EXAMPLE.COM] does not match [Postmaster@example.com]",
+       NULL
+       };
+
+static int is_exception(const char *msg)
+       {
+       const char *const *p;
+       for (p = exceptions; *p; ++p)
+               if (strcmp(msg, *p) == 0)
+                       return 1;
+       return 0;
+       }
+
+static int set_cn(X509 *crt, ...)
+       {
+       int ret = 0;
+       X509_NAME *n = NULL;
+       va_list ap;
+       va_start(ap, crt);
+       n = X509_NAME_new();
+       if (n == NULL)
+               goto out;
+       while (1) {
+               int nid;
+               const char *name;
+               nid = va_arg(ap, int);
+               if (nid == 0)
+                       break;
+               name = va_arg(ap, const char *);
+               if (!X509_NAME_add_entry_by_NID(n, nid, MBSTRING_ASC,
+                                                       (unsigned char *)name,
+                                               -1, -1, 1))
+                       goto out;
+       }
+       if (!X509_set_subject_name(crt, n))
+               goto out;
+       ret = 1;
+ out:
+       X509_NAME_free(n);
+       va_end(ap);
+       return ret;
+       }
+
+/*
+int            X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);
+X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
+                       int nid, int crit, ASN1_OCTET_STRING *data);
+int            X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);
+*/
+
+static int set_altname(X509 *crt, ...)
+       {
+       int ret = 0;
+       GENERAL_NAMES *gens = NULL;
+       GENERAL_NAME *gen = NULL;
+       ASN1_IA5STRING *ia5 = NULL;
+       va_list ap;
+       va_start(ap, crt);
+       gens = sk_GENERAL_NAME_new_null();
+       if (gens == NULL)
+               goto out;
+       while (1) {
+               int type;
+               const char *name;
+               type = va_arg(ap, int);
+               if (type == 0)
+                       break;
+               name = va_arg(ap, const char *);
+
+               gen = GENERAL_NAME_new();
+               if (gen == NULL)
+                       goto out;
+               ia5 = ASN1_IA5STRING_new();
+               if (ia5 == NULL)
+                       goto out;
+               if (!ASN1_STRING_set(ia5, name, -1))
+                       goto out;
+               switch (type)
+                       {
+                       case GEN_EMAIL:
+                       case GEN_DNS:
+                               GENERAL_NAME_set0_value(gen, type, ia5);
+                               ia5 = NULL;
+                               break;
+                       default:
+                               abort();
+                       }
+               sk_GENERAL_NAME_push(gens, gen);
+               gen = NULL;
+       }
+       if (!X509_add1_ext_i2d(crt, NID_subject_alt_name, gens, 0, 0))
+               goto out;
+       ret = 1;
+ out:
+       ASN1_IA5STRING_free(ia5);
+       GENERAL_NAME_free(gen);
+       GENERAL_NAMES_free(gens);
+       va_end(ap);
+       return ret;
+       }
+
+static int set_cn1(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_commonName, name, 0);
+       }
+
+
+static int set_cn_and_email(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_commonName, name,
+                     NID_pkcs9_emailAddress, "dummy@example.com", 0);
+       }
+
+static int set_cn2(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_commonName, "dummy value",
+                     NID_commonName, name, 0);
+       }
+
+static int set_cn3(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_commonName, name,
+                     NID_commonName, "dummy value", 0);
+       }
+
+static int set_email1(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_pkcs9_emailAddress, name, 0);
+       }
+
+static int set_email2(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_pkcs9_emailAddress, "dummy@example.com",
+                     NID_pkcs9_emailAddress, name, 0);
+       }
+
+static int set_email3(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_pkcs9_emailAddress, name,
+                     NID_pkcs9_emailAddress, "dummy@example.com", 0);
+       }
+
+static int set_email_and_cn(X509 *crt, const char *name)
+       {
+       return set_cn(crt, NID_pkcs9_emailAddress, name,
+                     NID_commonName, "www.example.org", 0);
+       }
+
+static int set_altname_dns(X509 *crt, const char *name)
+       {
+       return set_altname(crt, GEN_DNS, name, 0);
+       }
+
+static int set_altname_email(X509 *crt, const char *name)
+       {
+       return set_altname(crt, GEN_EMAIL, name, 0);
+       }
+
+struct set_name_fn
+       {
+       int (*fn)(X509 *, const char *);
+       const char *name;
+       int host;
+       int email;
+       };
+
+static const struct set_name_fn name_fns[] =
+       {
+       {set_cn1, "set CN", 1, 0},
+       {set_cn2, "set CN", 1, 0},
+       {set_cn3, "set CN", 1, 0},
+       {set_cn_and_email, "set CN", 1, 0},
+       {set_email1, "set emailAddress", 0, 1},
+       {set_email2, "set emailAddress", 0, 1},
+       {set_email3, "set emailAddress", 0, 1},
+       {set_email_and_cn, "set emailAddress", 0, 1},
+       {set_altname_dns, "set dnsName", 1, 0},
+       {set_altname_email, "set rfc822Name", 0, 1},
+       {NULL, NULL, 0}
+       };
+
+static X509 *make_cert()
+       {
+       X509 *ret = NULL;
+       X509 *crt = NULL;
+       X509_NAME *issuer = NULL;
+       crt = X509_new();
+       if (crt == NULL)
+               goto out;
+       if (!X509_set_version(crt, 3))
+               goto out;
+       ret = crt;
+       crt = NULL;
+ out:
+       X509_NAME_free(issuer);
+       return ret;
+       }
+
+static int errors;
+
+static void check_message(const struct set_name_fn *fn, const char *op,
+                         const char *nameincert, int match, const char *name)
+       {
+       char msg[1024];
+       if (match < 0)
+               return;
+       snprintf(msg, sizeof(msg), "%s: %s: [%s] %s [%s]",
+                fn->name, op, nameincert,
+                match ? "matches" : "does not match", name);
+       if (is_exception(msg))
+               return;
+       puts(msg);
+       ++errors;
+       }
+
+static void run_cert(X509 *crt, const char *nameincert,
+                    const struct set_name_fn *fn)
+       {
+       const char *const *pname = names;
+       while (*pname)
+               {
+               int samename = strcasecmp(nameincert, *pname) == 0;
+               size_t namelen = strlen(*pname);
+               char *name = malloc(namelen);
+               int match, ret;
+               memcpy(name, *pname, namelen);
+
+               ret = X509_check_host(crt, (const unsigned char *)name,
+                                     namelen, 0);
+               match = -1;
+               if (fn->host)
+                       {
+                       if (ret && !samename)
+                               match = 1;
+                       if (!ret && samename)
+                               match = 0;
+                       }
+               else if (ret)
+                       match = 1;
+               check_message(fn, "host", nameincert, match, *pname);
+
+               ret = X509_check_host(crt, (const unsigned char *)name,
+                                     namelen, X509_CHECK_FLAG_NO_WILDCARDS);
+               match = -1;
+               if (fn->host)
+                       {
+                       if (ret && !samename)
+                               match = 1;
+                       if (!ret && samename)
+                               match = 0;
+                       }
+               else if (ret)
+                       match = 1;
+               check_message(fn, "host-no-wildcards",
+                             nameincert, match, *pname);
+
+               ret = X509_check_email(crt, (const unsigned char *)name,
+                                      namelen, 0);
+               match = -1;
+               if (fn->email)
+                       {
+                       if (ret && !samename)
+                               match = 1;
+                       if (!ret && samename && strchr(nameincert, '@') != NULL)
+                               match = 0;
+                       }
+               else if (ret)
+                       match = 1;
+               check_message(fn, "email", nameincert, match, *pname);
+               ++pname;
+               free(name);
+               }
+       }
+
+int
+main(void)
+       {
+       const struct set_name_fn *pfn = name_fns;
+       while (pfn->name) {
+               const char *const *pname = names;
+               while (*pname)
+                       {
+                       X509 *crt = make_cert();
+                       if (crt == NULL)
+                               {
+                               fprintf(stderr, "make_cert failed\n");
+                               return 1;
+                               }
+                       if (!pfn->fn(crt, *pname))
+                               {
+                               fprintf(stderr, "X509 name setting failed\n");
+                               return 1;
+                               }
+                       run_cert(crt, *pname, pfn);
+                       X509_free(crt);
+                       ++pname;
+                       }
+               ++pfn;
+       }
+       return errors > 0 ? 1 : 0;
+       }
index 23f7091..272374e 100644 (file)
@@ -704,6 +704,8 @@ STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x);
 
 /* Always check subject name for host match even if subject alt names present */
 #define X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT   0x1
+/* Disable wild-card matching for dnsName fields and common name. */
+#define X509_CHECK_FLAG_NO_WILDCARDS   0x2
 
 int X509_check_host(X509 *x, const unsigned char *chk, size_t chklen,
                                        unsigned int flags);
diff --git a/doc/crypto/X509_check_host.pod b/doc/crypto/X509_check_host.pod
new file mode 100644 (file)
index 0000000..5ac2137
--- /dev/null
@@ -0,0 +1,76 @@
+=pod
+
+=head1 NAME
+
+X509_check_host, X509_check_email, X509_check_ip, X509_check_ip_asc - X.509 certificate matching
+
+=head1 SYNOPSIS
+
+ #include <openssl/x509.h>
+
+ int X509_check_host(X509 *, const unsigned char *name,
+                     size_t namelen, unsigned int flags);
+ int X509_check_email(X509 *, const unsigned char *address,
+                     size_t addresslen, unsigned int flags);
+ int X509_check_ip(X509 *, const unsigned char *address,
+                   size_t addresslen, unsigned int flags);
+ int X509_check_ip_asc(X509 *, const char *address, unsigned int flags);
+
+=head1 DESCRIPTION
+
+The certificate matching functions are intended to be called to check
+if a certificate matches a given host name, email address, or IP
+address.  The validity of the certificate and its trust level has to
+be checked by other means.
+
+X509_check_host() checks if the certificate matches the specified
+host name, which must be encoded in the preferred name syntax
+described in section 3.5 of RFC 1034. The B<namelen> argument must be
+the number of characters in the name string or zero in which case the
+length is calculated with strlen(name).
+
+X509_check_email() checks if the certificate matches the specified
+email address.  Only the mailbox syntax of RFC 822 is supported,
+comments are not allowed, and no attempt is made to normalize quoted
+characters.  The B<addresslen> argument must be the number of
+characters in the address string. The B<namelen> argument must be
+the number of characters in the name string or zero in which case the
+length is calculated with strlen(name).
+
+X509_check_ip() checks if the certificate matches a specified IPv4 or
+IPv6 address.  The B<address> array is in binary format, in network
+byte order.  The length is either 4 (IPv4) or 16 (IPv6).  Only
+explicitly marked addresses in the certificates are considered; IP
+addresses stored in DNS names and Common Names are ignored.
+
+X509_check_ip_asc() is similar, except that the NUL-terminated
+string B<address> is first converted to the internal representation.
+
+The B<flags> argument is usually 0.  It can be the bitwise OR of the
+flags B<X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT>,
+B<X509_CHECK_FLAG_NO_WILDCARDS>.
+
+The B<X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT> flag causes the function
+to check the subject DN even if the certificate contains a subject
+alternative name extension is present; the default is to ignore the
+subject DN in preference of the extension.
+
+If present, B<X509_CHECK_FLAG_NO_WILDCARDS> disables wildcard
+expansion; this only applies to B<X509_check_host>.
+
+=head1 RETURN VALUES
+
+The functions return 1 for a successful match, 0 for a failed match
+and -1 for an internal error: typically a memory allocation failure.
+
+X509_check_ip_asc() can also return -2 if the IP address string is malformed.
+
+=head1 SEE ALSO
+
+L<SSL_get_verify_result(3)|SSL_get_verify_result(3)>
+
+=head1 HISTORY
+
+These functions were added in OpenSSL 1.1.0.
+
+=cut
index 77caa25..7210165 100644 (file)
@@ -64,6 +64,7 @@ EVPTEST=      evp_test
 IGETEST=       igetest
 JPAKETEST=     jpaketest
 SRPTEST=       srptest
+V3NAMETEST=    v3nametest
 FIPS_SHATEST=  fips_shatest
 FIPS_DESTEST=  fips_desmovs
 FIPS_RANDTEST= fips_randtest
@@ -94,7 +95,8 @@ EXE=  $(BNTEST)$(EXE_EXT) $(ECTEST)$(EXE_EXT)  $(ECDSATEST)$(EXE_EXT) $(ECDHTEST)
        $(RANDTEST)$(EXE_EXT) $(DHTEST)$(EXE_EXT) $(ENGINETEST)$(EXE_EXT) \
        $(BFTEST)$(EXE_EXT) $(CASTTEST)$(EXE_EXT) $(SSLTEST)$(EXE_EXT) \
        $(EXPTEST)$(EXE_EXT) $(DSATEST)$(EXE_EXT) $(RSATEST)$(EXE_EXT) \
-       $(EVPTEST)$(EXE_EXT) $(IGETEST)$(EXE_EXT) $(JPAKETEST)$(EXE_EXT) $(SRPTEST)$(EXE_EXT)
+       $(EVPTEST)$(EXE_EXT) $(IGETEST)$(EXE_EXT) $(JPAKETEST)$(EXE_EXT) $(SRPTEST)$(EXE_EXT) \
+       $(V3NAMETEST)$(EXE_EXT)
 
 FIPSEXE=$(FIPS_SHATEST)$(EXE_EXT) $(FIPS_DESTEST)$(EXE_EXT) \
        $(FIPS_RANDTEST)$(EXE_EXT) $(FIPS_AESTEST)$(EXE_EXT) \
@@ -122,7 +124,7 @@ OBJ=        $(BNTEST).o $(ECTEST).o  $(ECDSATEST).o $(ECDHTEST).o $(IDEATEST).o \
        $(FIPS_DSSVS).o $(FIPS_DSATEST).o $(FIPS_RNGVS).o $(FIPS_DRBGVS).o \
        $(FIPS_TEST_SUITE).o $(FIPS_DHVS).o $(FIPS_ECDSAVS).o \
        $(FIPS_ECDHVS).o $(FIPS_CMACTEST).o $(FIPS_ALGVS).o \
-       $(EVPTEST).o $(IGETEST).o $(JPAKETEST).o
+       $(EVPTEST).o $(IGETEST).o $(JPAKETEST).o $(V3NAMETEST).o
 SRC=   $(BNTEST).c $(ECTEST).c  $(ECDSATEST).c $(ECDHTEST).c $(IDEATEST).c \
        $(MD2TEST).c  $(MD4TEST).c $(MD5TEST).c \
        $(HMACTEST).c $(WPTEST).c \
@@ -136,7 +138,7 @@ SRC=        $(BNTEST).c $(ECTEST).c  $(ECDSATEST).c $(ECDHTEST).c $(IDEATEST).c \
        $(FIPS_DSSVS).c $(FIPS_DSATEST).c $(FIPS_RNGVS).c $(FIPS_DRBGVS).c \
        $(FIPS_TEST_SUITE).c $(FIPS_DHVS).c $(FIPS_ECDSAVS).c \
        $(FIPS_ECDHVS).c $(FIPS_CMACTEST).c $(FIPS_ALGVS).c \
-       $(EVPTEST).c $(IGETEST).c $(JPAKETEST).c
+       $(EVPTEST).c $(IGETEST).c $(JPAKETEST).c $(V3NAMETEST).c
 
 EXHEADER= 
 HEADER=        $(EXHEADER)
@@ -183,7 +185,7 @@ alltests: \
        test_enc test_x509 test_rsa test_crl test_sid \
        test_gen test_req test_pkcs7 test_verify test_dh test_dsa \
        test_ss test_ca test_engine test_evp test_ssl test_tsa test_ige \
-       test_jpake test_srp test_cms
+       test_jpake test_srp test_cms test_v3name
 
 test_evp:
        ../util/shlib_wrap.sh ./$(EVPTEST) evptests.txt
@@ -361,6 +363,10 @@ test_srp: $(SRPTEST)$(EXE_EXT)
        @echo "Test SRP"
        ../util/shlib_wrap.sh ./srptest
 
+test_v3name: $(V3NAMETEST)$(EXE_EXT)
+       @echo "Test X509v3_check_*"
+       ../util/shlib_wrap.sh ./$(V3NAMETEST)
+
 lint:
        lint -DLINT $(INCLUDES) $(SRC)>fluff
 
@@ -583,6 +589,9 @@ $(JPAKETEST)$(EXE_EXT): $(JPAKETEST).o $(DLIBCRYPTO)
 $(SRPTEST)$(EXE_EXT): $(SRPTEST).o $(DLIBCRYPTO)
        @target=$(SRPTEST); $(BUILD_CMD)
 
+$(V3NAMETEST)$(EXE_EXT): $(V3NAMETEST).o $(DLIBCRYPTO)
+       @target=$(V3NAMETEST); $(BUILD_CMD)
+
 #$(AESTEST).o: $(AESTEST).c
 #      $(CC) -c $(CFLAGS) -DINTERMEDIATE_VALUE_KAT -DTRACE_KAT_MCT $(AESTEST).c