Changed a comment.
[openssl.git] / ssl / ssl_cert.c
index 7d4531d808ec6ad7f32d38d61f58d9b9706f2326..9bfa3ecf2e18af4f3a191f4b87ad4e5b0eac065e 100644 (file)
@@ -1,4 +1,4 @@
-/* ssl/ssl_cert.c */
+/*! \file ssl/ssl_cert.c */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * copied and put under another distribution licence
  * [including the GNU Public Licence.]
  */
+/* ====================================================================
+ * Copyright (c) 1999 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
+ *    openssl-core@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.
+ * ====================================================================
+ */
 
 #include <stdio.h>
-#include "objects.h"
-#include "bio.h"
-#include "pem.h"
+#include <sys/types.h>
+#ifndef WIN32
+#include <dirent.h>
+#endif
+#include <openssl/objects.h>
+#include <openssl/bio.h>
+#include <openssl/pem.h>
 #include "ssl_locl.h"
 
-int SSL_get_ex_data_X509_STORE_CTX_idx()
+int SSL_get_ex_data_X509_STORE_CTX_idx(void)
        {
        static int ssl_x509_store_ctx_idx= -1;
 
@@ -74,7 +126,7 @@ int SSL_get_ex_data_X509_STORE_CTX_idx()
        return(ssl_x509_store_ctx_idx);
        }
 
-CERT *ssl_cert_new()
+CERT *ssl_cert_new(void)
        {
        CERT *ret;
 
@@ -100,8 +152,133 @@ CERT *ssl_cert_new()
        return(ret);
        }
 
-void ssl_cert_free(c)
-CERT *c;
+CERT *ssl_cert_dup(CERT *cert)
+       {
+       CERT *ret;
+       int i;
+
+       ret = (CERT *)Malloc(sizeof(CERT));
+       if (ret == NULL)
+               {
+               SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
+               return(NULL);
+               }
+
+       memset(ret, 0, sizeof(CERT));
+
+       ret->cert_type = cert->cert_type;
+
+       ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
+       /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
+        * if you find that more readable */
+
+       ret->valid = cert->valid;
+       ret->mask = cert->mask;
+       ret->export_mask = cert->export_mask;
+
+#ifndef NO_RSA
+       if (cert->rsa_tmp != NULL)
+               {
+               ret->rsa_tmp = cert->rsa_tmp;
+               CRYPTO_add(&ret->rsa_tmp->references, 1, CRYPTO_LOCK_RSA);
+               }
+       ret->rsa_tmp_cb = cert->rsa_tmp_cb;
+#endif
+
+#ifndef NO_DH
+       if (cert->dh_tmp != NULL)
+               {
+               /* DH parameters don't have a reference count (and cannot
+                * reasonably be shared anyway, as the secret exponent may
+                * be created just when it is needed -- earlier library
+                * versions did not pay attention to this) */
+               ret->dh_tmp = DHparams_dup(cert->dh_tmp);
+               if (ret->dh_tmp == NULL)
+                       {
+                       SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_DH_LIB);
+                       goto err;
+                       }
+               }
+       ret->dh_tmp_cb = cert->dh_tmp_cb;
+#endif
+
+       for (i = 0; i < SSL_PKEY_NUM; i++)
+               {
+               if (cert->pkeys[i].x509 != NULL)
+                       {
+                       ret->pkeys[i].x509 = cert->pkeys[i].x509;
+                       CRYPTO_add(&ret->pkeys[i].x509->references, 1,
+                               CRYPTO_LOCK_X509);
+                       }
+               
+               if (cert->pkeys[i].privatekey != NULL)
+                       {
+                       ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
+                       CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
+                               CRYPTO_LOCK_EVP_PKEY);
+
+                       switch(i) 
+                               {
+                               /* If there was anything special to do for
+                                * certain types of keys, we'd do it here.
+                                * (Nothing at the moment, I think.) */
+
+                       case SSL_PKEY_RSA_ENC:
+                       case SSL_PKEY_RSA_SIGN:
+                               /* We have an RSA key. */
+                               break;
+                               
+                       case SSL_PKEY_DSA_SIGN:
+                               /* We have a DSA key. */
+                               break;
+                               
+                       case SSL_PKEY_DH_RSA:
+                       case SSL_PKEY_DH_DSA:
+                               /* We have a DH key. */
+                               break;
+                               
+                       default:
+                               /* Can't happen. */
+                               SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
+                               }
+                       }
+               }
+       
+
+       /* ret->cert_chain should not exist: that's pure per-connection data.
+        * Anyway, we never use this function when it is non-NULL,
+        * so we just don't look at it. */
+
+       /* ret->extra_certs *should* exist, but currently the own certificate
+        * chain is held inside SSL_CTX */
+
+       ret->references=1;
+
+       return(ret);
+       
+err:
+#ifndef NO_RSA
+       if (ret->rsa_tmp != NULL)
+               RSA_free(ret->rsa_tmp);
+#endif
+#ifndef NO_DH
+       if (ret->dh_tmp != NULL)
+               DH_free(ret->dh_tmp);
+#endif
+
+       for (i = 0; i < SSL_PKEY_NUM; i++)
+               {
+               if (ret->pkeys[i].x509 != NULL)
+                       X509_free(ret->pkeys[i].x509);
+               if (ret->pkeys[i].privatekey != NULL)
+                       EVP_PKEY_free(ret->pkeys[i].privatekey);
+               }
+
+       return NULL;
+       }
+
+
+void ssl_cert_free(CERT *c)
        {
        int i;
 
@@ -140,31 +317,81 @@ CERT *c;
 #endif
                }
        if (c->cert_chain != NULL)
-               sk_pop_free(c->cert_chain,X509_free);
+               sk_X509_pop_free(c->cert_chain,X509_free);
        Free(c);
        }
 
-int ssl_set_cert_type(c, type)
-CERT *c;
-int type;
+#if 1
+int ssl_cert_inst(CERT **o)
+       {
+       /* Create a CERT if there isn't already one
+        * (which cannot really happen, as it is initially created in
+        * SSL_CTX_new; but the earlier code usually allows for that one
+        * being non-existant, so we follow that behaviour, as it might
+        * turn out that there actually is a reason for it -- but I'm
+        * not sure that *all* of the existing code could cope with
+        * s->cert being NULL, otherwise we could do without the
+        * initialization in SSL_CTX_new).
+        */
+       
+       if (o == NULL) 
+               {
+               SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
+               return(0);
+               }
+       if (*o == NULL)
+               {
+               if ((*o = ssl_cert_new()) == NULL)
+                       {
+                       SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
+                       return(0);
+                       }
+               }
+       return(1);
+       }
+
+#else /* Not needed any longer: SSL's always have their own copy */
+int ssl_cert_instantiate(CERT **o, CERT *d)
+       {
+       CERT *n;
+       if (o == NULL) 
+               {
+               SSLerr(SSL_F_SSL_CERT_INSTANTIATE, ERR_R_PASSED_NULL_PARAMETER);
+               return(0);
+               }
+       if (*o != NULL && (d == NULL || *o != d))
+           return(1);
+       if ((n = ssl_cert_new()) == NULL) 
+               {
+               SSLerr(SSL_F_SSL_CERT_INSTANTIATE, ERR_R_MALLOC_FAILURE);
+               return(0);
+               }
+       if (*o != NULL) 
+               ssl_cert_free(*o);
+       *o = n;
+       return(1);
+       }
+#endif
+
+int ssl_set_cert_type(CERT *c,int type)
        {
        c->cert_type=type;
        return(1);
        }
 
-int ssl_verify_cert_chain(s,sk)
-SSL *s;
-STACK *sk;
+int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
        {
        X509 *x;
        int i;
        X509_STORE_CTX ctx;
 
-       if ((sk == NULL) || (sk_num(sk) == 0))
+       if ((sk == NULL) || (sk_X509_num(sk) == 0))
                return(0);
 
-       x=(X509 *)sk_value(sk,0);
+       x=sk_X509_value(sk,0);
        X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk);
+       if (SSL_get_verify_depth(s) >= 0)
+               X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
        X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),
                (char *)s);
 
@@ -187,18 +414,15 @@ STACK *sk;
        return(i);
        }
 
-static void set_client_CA_list(ca_list,list)
-STACK **ca_list;
-STACK *list;
+static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *list)
        {
        if (*ca_list != NULL)
-               sk_pop_free(*ca_list,X509_NAME_free);
+               sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 
        *ca_list=list;
        }
 
-STACK *SSL_dup_CA_list(sk)
-STACK *sk;
+STACK *SSL_dup_CA_list(STACK *sk)
        {
        int i;
        STACK *ret;
@@ -217,28 +441,22 @@ STACK *sk;
        return(ret);
        }
 
-void SSL_set_client_CA_list(s,list)
-SSL *s;
-STACK *list;
+void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *list)
        {
        set_client_CA_list(&(s->client_CA),list);
        }
 
-void SSL_CTX_set_client_CA_list(ctx,list)
-SSL_CTX *ctx;
-STACK *list;
+void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *list)
        {
        set_client_CA_list(&(ctx->client_CA),list);
        }
 
-STACK *SSL_CTX_get_client_CA_list(ctx)
-SSL_CTX *ctx;
+STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(SSL_CTX *ctx)
        {
        return(ctx->client_CA);
        }
 
-STACK *SSL_get_client_CA_list(s)
-SSL *s;
+STACK_OF(X509_NAME) *SSL_get_client_CA_list(SSL *s)
        {
        if (s->type == SSL_ST_CONNECT)
                { /* we are in the client */
@@ -257,20 +475,18 @@ SSL *s;
                }
        }
 
-static int add_client_CA(sk,x)
-STACK **sk;
-X509 *x;
+static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
        {
        X509_NAME *name;
 
        if (x == NULL) return(0);
-       if ((*sk == NULL) && ((*sk=sk_new_null()) == NULL))
+       if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
                return(0);
                
        if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
                return(0);
 
-       if (!sk_push(*sk,(char *)name))
+       if (!sk_X509_NAME_push(*sk,name))
                {
                X509_NAME_free(name);
                return(0);
@@ -278,37 +494,39 @@ X509 *x;
        return(1);
        }
 
-int SSL_add_client_CA(ssl,x)
-SSL *ssl;
-X509 *x;
+int SSL_add_client_CA(SSL *ssl,X509 *x)
        {
        return(add_client_CA(&(ssl->client_CA),x));
        }
 
-int SSL_CTX_add_client_CA(ctx,x)
-SSL_CTX *ctx;
-X509 *x;
+int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
        {
        return(add_client_CA(&(ctx->client_CA),x));
        }
 
-static int name_cmp(a,b)
-X509_NAME **a,**b;
+static int name_cmp(X509_NAME **a,X509_NAME **b)
        {
        return(X509_NAME_cmp(*a,*b));
        }
 
 #ifndef NO_STDIO
-STACK *SSL_load_client_CA_file(file)
-char *file;
+/*!
+ * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
+ * it doesn't really have anything to do with clients (except that a common use
+ * for a stack of CAs is to send it to the client). Actually, it doesn't have
+ * much to do with CAs, either, since it will load any old cert.
+ * \param file the file containing one or more certs.
+ * \return a ::STACK containing the certs.
+ */
+STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
        {
        BIO *in;
        X509 *x=NULL;
        X509_NAME *xn=NULL;
-       STACK *ret,*sk;
+       STACK_OF(X509_NAME) *ret,*sk;
 
-       ret=sk_new(NULL);
-       sk=sk_new(name_cmp);
+       ret=sk_X509_NAME_new(NULL);
+       sk=sk_X509_NAME_new(name_cmp);
 
        in=BIO_new(BIO_s_file_internal());
 
@@ -329,25 +547,129 @@ char *file;
                /* check for duplicates */
                xn=X509_NAME_dup(xn);
                if (xn == NULL) goto err;
-               if (sk_find(sk,(char *)xn) >= 0)
+               if (sk_X509_NAME_find(sk,xn) >= 0)
                        X509_NAME_free(xn);
                else
                        {
-                       sk_push(sk,(char *)xn);
-                       sk_push(ret,(char *)xn);
+                       sk_X509_NAME_push(sk,xn);
+                       sk_X509_NAME_push(ret,xn);
                        }
                }
 
        if (0)
                {
 err:
-               if (ret != NULL) sk_pop_free(ret,X509_NAME_free);
+               if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
                ret=NULL;
                }
-       if (sk != NULL) sk_free(sk);
+       if (sk != NULL) sk_X509_NAME_free(sk);
        if (in != NULL) BIO_free(in);
        if (x != NULL) X509_free(x);
        return(ret);
        }
 #endif
 
+/*!
+ * Add a file of certs to a stack.
+ * \param stack the stack to add to.
+ * \param file the file to add from. All certs in this file that are not
+ * already in the stack will be added.
+ * \return 1 for success, 0 for failure. Note that in the case of failure some
+ * certs may have been added to \c stack.
+ */
+
+int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
+                                       const char *file)
+    {
+    BIO *in;
+    X509 *x=NULL;
+    X509_NAME *xn=NULL;
+    int ret=1;
+    int (*oldcmp)(X509_NAME **a, X509_NAME **b);
+
+    oldcmp=sk_X509_NAME_set_cmp_func(stack,name_cmp);
+
+    in=BIO_new(BIO_s_file_internal());
+
+    if (in == NULL)
+       {
+       SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
+       goto err;
+       }
+       
+    if (!BIO_read_filename(in,file))
+       goto err;
+
+    for (;;)
+       {
+       if (PEM_read_bio_X509(in,&x,NULL) == NULL)
+           break;
+       if ((xn=X509_get_subject_name(x)) == NULL) goto err;
+       xn=X509_NAME_dup(xn);
+       if (xn == NULL) goto err;
+       if (sk_X509_NAME_find(stack,xn) >= 0)
+           X509_NAME_free(xn);
+       else
+           sk_X509_NAME_push(stack,xn);
+       }
+
+    if (0)
+       {
+err:
+       ret=0;
+       }
+    if(in != NULL)
+       BIO_free(in);
+    if(x != NULL)
+       X509_free(x);
+
+    sk_X509_NAME_set_cmp_func(stack,oldcmp);
+
+    return ret;
+    }
+
+/*!
+ * Add a directory of certs to a stack.
+ * \param stack the stack to append to.
+ * \param dir the directory to append from. All files in this directory will be
+ * examined as potential certs. Any that are acceptable to
+ * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
+ * included.
+ * \return 1 for success, 0 for failure. Note that in the case of failure some
+ * certs may have been added to \c stack.
+ */
+
+#ifndef WIN32
+
+int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
+                                      const char *dir)
+    {
+    DIR *d=opendir(dir);
+    struct dirent *dstruct;
+
+    /* Note that a side effect is that the CAs will be sorted by name */
+    if(!d)
+       {
+       SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
+       return 0;
+       }
+
+    while((dstruct=readdir(d)))
+       {
+       char buf[1024];
+
+       if(strlen(dir)+strlen(dstruct->d_name)+2 > sizeof buf)
+           {
+           SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
+           return 0;
+           }
+       
+       sprintf(buf,"%s/%s",dir,dstruct->d_name);
+       if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
+           return 0;
+       }
+
+    return 1;
+    }
+
+#endif