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      1 /* v3_skey.c */
      2 /*
      3  * Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com).  This product includes software written by Tim
     56  * Hudson (tjh (at) cryptsoft.com). */
     57 
     58 #include <stdio.h>
     59 #include <string.h>
     60 
     61 #include <openssl/digest.h>
     62 #include <openssl/err.h>
     63 #include <openssl/obj.h>
     64 #include <openssl/x509v3.h>
     65 
     66 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
     67                                       X509V3_CTX *ctx, char *str);
     68 const X509V3_EXT_METHOD v3_skey_id = {
     69     NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
     70     0, 0, 0, 0,
     71     (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
     72     (X509V3_EXT_S2I)s2i_skey_id,
     73     0, 0, 0, 0,
     74     NULL
     75 };
     76 
     77 char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct)
     78 {
     79     return hex_to_string(oct->data, oct->length);
     80 }
     81 
     82 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
     83                                          X509V3_CTX *ctx, char *str)
     84 {
     85     ASN1_OCTET_STRING *oct;
     86     long length;
     87 
     88     if (!(oct = M_ASN1_OCTET_STRING_new())) {
     89         OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
     90         return NULL;
     91     }
     92 
     93     if (!(oct->data = string_to_hex(str, &length))) {
     94         M_ASN1_OCTET_STRING_free(oct);
     95         return NULL;
     96     }
     97 
     98     oct->length = length;
     99 
    100     return oct;
    101 
    102 }
    103 
    104 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
    105                                       X509V3_CTX *ctx, char *str)
    106 {
    107     ASN1_OCTET_STRING *oct;
    108     ASN1_BIT_STRING *pk;
    109     unsigned char pkey_dig[EVP_MAX_MD_SIZE];
    110     unsigned int diglen;
    111 
    112     if (strcmp(str, "hash"))
    113         return s2i_ASN1_OCTET_STRING(method, ctx, str);
    114 
    115     if (!(oct = M_ASN1_OCTET_STRING_new())) {
    116         OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
    117         return NULL;
    118     }
    119 
    120     if (ctx && (ctx->flags == CTX_TEST))
    121         return oct;
    122 
    123     if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
    124         OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
    125         goto err;
    126     }
    127 
    128     if (ctx->subject_req)
    129         pk = ctx->subject_req->req_info->pubkey->public_key;
    130     else
    131         pk = ctx->subject_cert->cert_info->key->public_key;
    132 
    133     if (!pk) {
    134         OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_PUBLIC_KEY);
    135         goto err;
    136     }
    137 
    138     if (!EVP_Digest
    139         (pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL))
    140         goto err;
    141 
    142     if (!M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
    143         OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
    144         goto err;
    145     }
    146 
    147     return oct;
    148 
    149  err:
    150     M_ASN1_OCTET_STRING_free(oct);
    151     return NULL;
    152 }
    153