Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* ocsp_lib.c */ |
| 2 | /* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL |
| 3 | * project. */ |
| 4 | |
| 5 | /* History: |
| 6 | This file was transfered to Richard Levitte from CertCo by Kathy |
| 7 | Weinhold in mid-spring 2000 to be included in OpenSSL or released |
| 8 | as a patch kit. */ |
| 9 | |
| 10 | /* ==================================================================== |
| 11 | * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or without |
| 14 | * modification, are permitted provided that the following conditions |
| 15 | * are met: |
| 16 | * |
| 17 | * 1. Redistributions of source code must retain the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer. |
| 19 | * |
| 20 | * 2. Redistributions in binary form must reproduce the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer in |
| 22 | * the documentation and/or other materials provided with the |
| 23 | * distribution. |
| 24 | * |
| 25 | * 3. All advertising materials mentioning features or use of this |
| 26 | * software must display the following acknowledgment: |
| 27 | * "This product includes software developed by the OpenSSL Project |
| 28 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 29 | * |
| 30 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 31 | * endorse or promote products derived from this software without |
| 32 | * prior written permission. For written permission, please contact |
| 33 | * openssl-core@openssl.org. |
| 34 | * |
| 35 | * 5. Products derived from this software may not be called "OpenSSL" |
| 36 | * nor may "OpenSSL" appear in their names without prior written |
| 37 | * permission of the OpenSSL Project. |
| 38 | * |
| 39 | * 6. Redistributions of any form whatsoever must retain the following |
| 40 | * acknowledgment: |
| 41 | * "This product includes software developed by the OpenSSL Project |
| 42 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 43 | * |
| 44 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 45 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 46 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 47 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 48 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 49 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 50 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 51 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 53 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 54 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 55 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 56 | * ==================================================================== |
| 57 | * |
| 58 | * This product includes cryptographic software written by Eric Young |
| 59 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 60 | * Hudson (tjh@cryptsoft.com). |
| 61 | * |
| 62 | */ |
| 63 | |
| 64 | #include <stdio.h> |
| 65 | #include <cryptlib.h> |
| 66 | #include <openssl/objects.h> |
| 67 | #include <openssl/rand.h> |
| 68 | #include <openssl/x509.h> |
| 69 | #include <openssl/pem.h> |
| 70 | #include <openssl/x509v3.h> |
| 71 | #include <openssl/ocsp.h> |
| 72 | #include <openssl/asn1t.h> |
| 73 | |
| 74 | /* Convert a certificate and its issuer to an OCSP_CERTID */ |
| 75 | |
| 76 | OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer) |
| 77 | { |
| 78 | X509_NAME *iname; |
| 79 | ASN1_INTEGER *serial; |
| 80 | ASN1_BIT_STRING *ikey; |
| 81 | #ifndef OPENSSL_NO_SHA1 |
| 82 | if(!dgst) dgst = EVP_sha1(); |
| 83 | #endif |
| 84 | if (subject) |
| 85 | { |
| 86 | iname = X509_get_issuer_name(subject); |
| 87 | serial = X509_get_serialNumber(subject); |
| 88 | } |
| 89 | else |
| 90 | { |
| 91 | iname = X509_get_subject_name(issuer); |
| 92 | serial = NULL; |
| 93 | } |
| 94 | ikey = X509_get0_pubkey_bitstr(issuer); |
| 95 | return OCSP_cert_id_new(dgst, iname, ikey, serial); |
| 96 | } |
| 97 | |
| 98 | |
| 99 | OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst, |
| 100 | X509_NAME *issuerName, |
| 101 | ASN1_BIT_STRING* issuerKey, |
| 102 | ASN1_INTEGER *serialNumber) |
| 103 | { |
| 104 | int nid; |
| 105 | unsigned int i; |
| 106 | X509_ALGOR *alg; |
| 107 | OCSP_CERTID *cid = NULL; |
| 108 | unsigned char md[EVP_MAX_MD_SIZE]; |
| 109 | |
| 110 | if (!(cid = OCSP_CERTID_new())) goto err; |
| 111 | |
| 112 | alg = cid->hashAlgorithm; |
| 113 | if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm); |
| 114 | if ((nid = EVP_MD_type(dgst)) == NID_undef) |
| 115 | { |
| 116 | OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_UNKNOWN_NID); |
| 117 | goto err; |
| 118 | } |
| 119 | if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err; |
| 120 | if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err; |
| 121 | alg->parameter->type=V_ASN1_NULL; |
| 122 | |
| 123 | if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr; |
| 124 | if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err; |
| 125 | |
| 126 | /* Calculate the issuerKey hash, excluding tag and length */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 127 | EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 128 | |
| 129 | if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err; |
| 130 | |
| 131 | if (serialNumber) |
| 132 | { |
| 133 | ASN1_INTEGER_free(cid->serialNumber); |
| 134 | if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err; |
| 135 | } |
| 136 | return cid; |
| 137 | digerr: |
| 138 | OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_DIGEST_ERR); |
| 139 | err: |
| 140 | if (cid) OCSP_CERTID_free(cid); |
| 141 | return NULL; |
| 142 | } |
| 143 | |
| 144 | int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) |
| 145 | { |
| 146 | int ret; |
| 147 | ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); |
| 148 | if (ret) return ret; |
| 149 | ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); |
| 150 | if (ret) return ret; |
| 151 | return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); |
| 152 | } |
| 153 | |
| 154 | int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) |
| 155 | { |
| 156 | int ret; |
| 157 | ret = OCSP_id_issuer_cmp(a, b); |
| 158 | if (ret) return ret; |
| 159 | return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /* Parse a URL and split it up into host, port and path components and whether |
| 164 | * it is SSL. |
| 165 | */ |
| 166 | |
| 167 | int OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl) |
| 168 | { |
| 169 | char *p, *buf; |
| 170 | |
| 171 | char *host, *port; |
| 172 | |
| 173 | *phost = NULL; |
| 174 | *pport = NULL; |
| 175 | *ppath = NULL; |
| 176 | |
| 177 | /* dup the buffer since we are going to mess with it */ |
| 178 | buf = BUF_strdup(url); |
| 179 | if (!buf) goto mem_err; |
| 180 | |
| 181 | /* Check for initial colon */ |
| 182 | p = strchr(buf, ':'); |
| 183 | |
| 184 | if (!p) goto parse_err; |
| 185 | |
| 186 | *(p++) = '\0'; |
| 187 | |
| 188 | if (!strcmp(buf, "http")) |
| 189 | { |
| 190 | *pssl = 0; |
| 191 | port = "80"; |
| 192 | } |
| 193 | else if (!strcmp(buf, "https")) |
| 194 | { |
| 195 | *pssl = 1; |
| 196 | port = "443"; |
| 197 | } |
| 198 | else |
| 199 | goto parse_err; |
| 200 | |
| 201 | /* Check for double slash */ |
| 202 | if ((p[0] != '/') || (p[1] != '/')) |
| 203 | goto parse_err; |
| 204 | |
| 205 | p += 2; |
| 206 | |
| 207 | host = p; |
| 208 | |
| 209 | /* Check for trailing part of path */ |
| 210 | |
| 211 | p = strchr(p, '/'); |
| 212 | |
| 213 | if (!p) |
| 214 | *ppath = BUF_strdup("/"); |
| 215 | else |
| 216 | { |
| 217 | *ppath = BUF_strdup(p); |
| 218 | /* Set start of path to 0 so hostname is valid */ |
| 219 | *p = '\0'; |
| 220 | } |
| 221 | |
| 222 | if (!*ppath) goto mem_err; |
| 223 | |
| 224 | /* Look for optional ':' for port number */ |
| 225 | if ((p = strchr(host, ':'))) |
| 226 | { |
| 227 | *p = 0; |
| 228 | port = p + 1; |
| 229 | } |
| 230 | else |
| 231 | { |
| 232 | /* Not found: set default port */ |
| 233 | if (*pssl) port = "443"; |
| 234 | else port = "80"; |
| 235 | } |
| 236 | |
| 237 | *pport = BUF_strdup(port); |
| 238 | if (!*pport) goto mem_err; |
| 239 | |
| 240 | *phost = BUF_strdup(host); |
| 241 | |
| 242 | if (!*phost) goto mem_err; |
| 243 | |
| 244 | OPENSSL_free(buf); |
| 245 | |
| 246 | return 1; |
| 247 | |
| 248 | mem_err: |
| 249 | OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE); |
| 250 | goto err; |
| 251 | |
| 252 | parse_err: |
| 253 | OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL); |
| 254 | |
| 255 | |
| 256 | err: |
| 257 | if (buf) OPENSSL_free(buf); |
| 258 | if (*ppath) OPENSSL_free(*ppath); |
| 259 | if (*pport) OPENSSL_free(*pport); |
| 260 | if (*phost) OPENSSL_free(*phost); |
| 261 | return 0; |
| 262 | |
| 263 | } |
| 264 | |
| 265 | IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID) |