crypto/x509v3/v3_skey.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "internal/cryptlib.h"
  61 #include <openssl/x509v3.h>
  62 #include "internal/x509_int.h"
  63 #include "ext_dat.h"
  64
  65 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
  66                                       X509V3_CTX *ctx, char *str);
  67 const X509V3_EXT_METHOD v3_skey_id = {
  68     NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
  69     0, 0, 0, 0,
  70     (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
  71     (X509V3_EXT_S2I)s2i_skey_id,
  72     0, 0, 0, 0,
  73     NULL
  74 };
  75
  76 char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct)
  77 {
  78     return hex_to_string(oct->data, oct->length);
  79 }
  80
  81 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
  82                                          X509V3_CTX *ctx, char *str)
  83 {
  84     ASN1_OCTET_STRING *oct;
  85     long length;
  86
  87     if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
  88         X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
  89         return NULL;
  90     }
  91
  92     if ((oct->data = string_to_hex(str, &length)) == NULL) {
  93         ASN1_OCTET_STRING_free(oct);
  94         return NULL;
  95     }
  96
  97     oct->length = length;
  98
  99     return oct;
 100
 101 }
 102
 103 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
 104                                       X509V3_CTX *ctx, char *str)
 105 {
 106     ASN1_OCTET_STRING *oct;
 107     ASN1_BIT_STRING *pk;
 108     unsigned char pkey_dig[EVP_MAX_MD_SIZE];
 109     unsigned int diglen;
 110
 111     if (strcmp(str, "hash"))
 112         return s2i_ASN1_OCTET_STRING(method, ctx, str);
 113
 114     if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
 115         X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
 116         return NULL;
 117     }
 118
 119     if (ctx && (ctx->flags == CTX_TEST))
 120         return oct;
 121
 122     if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
 123         X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
 124         goto err;
 125     }
 126
 127     if (ctx->subject_req)
 128         pk = ctx->subject_req->req_info.pubkey->public_key;
 129     else
 130         pk = ctx->subject_cert->cert_info.key->public_key;
 131
 132     if (!pk) {
 133         X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
 134         goto err;
 135     }
 136
 137     if (!EVP_Digest
 138         (pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL))
 139         goto err;
 140
 141     if (!ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
 142         X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
 143         goto err;
 144     }
 145
 146     return oct;
 147
 148  err:
 149     ASN1_OCTET_STRING_free(oct);
 150     return NULL;
 151 }