crypto/x509v3/v3_skey.c

   1 /* v3_skey.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 1999.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/x509v3.h>
  63
  64 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
  65                                       X509V3_CTX *ctx, char *str);
  66 const X509V3_EXT_METHOD v3_skey_id = {
  67     NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
  68     0, 0, 0, 0,
  69     (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
  70     (X509V3_EXT_S2I)s2i_skey_id,
  71     0, 0, 0, 0,
  72     NULL
  73 };
  74
  75 char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct)
  76 {
  77     return hex_to_string(oct->data, oct->length);
  78 }
  79
  80 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
  81                                          X509V3_CTX *ctx, char *str)
  82 {
  83     ASN1_OCTET_STRING *oct;
  84     long length;
  85
  86     if (!(oct = M_ASN1_OCTET_STRING_new())) {
  87         X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
  88         return NULL;
  89     }
  90
  91     if (!(oct->data = string_to_hex(str, &length))) {
  92         M_ASN1_OCTET_STRING_free(oct);
  93         return NULL;
  94     }
  95
  96     oct->length = length;
  97
  98     return oct;
  99
 100 }
 101
 102 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
 103                                       X509V3_CTX *ctx, char *str)
 104 {
 105     ASN1_OCTET_STRING *oct;
 106     ASN1_BIT_STRING *pk;
 107     unsigned char pkey_dig[EVP_MAX_MD_SIZE];
 108     unsigned int diglen;
 109
 110     if (strcmp(str, "hash"))
 111         return s2i_ASN1_OCTET_STRING(method, ctx, str);
 112
 113     if (!(oct = M_ASN1_OCTET_STRING_new())) {
 114         X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
 115         return NULL;
 116     }
 117
 118     if (ctx && (ctx->flags == CTX_TEST))
 119         return oct;
 120
 121     if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
 122         X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
 123         goto err;
 124     }
 125
 126     if (ctx->subject_req)
 127         pk = ctx->subject_req->req_info->pubkey->public_key;
 128     else
 129         pk = ctx->subject_cert->cert_info->key->public_key;
 130
 131     if (!pk) {
 132         X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
 133         goto err;
 134     }
 135
 136     if (!EVP_Digest
 137         (pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL))
 138         goto err;
 139
 140     if (!M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
 141         X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
 142         goto err;
 143     }
 144
 145     return oct;
 146
 147  err:
 148     M_ASN1_OCTET_STRING_free(oct);
 149     return NULL;
 150 }