1 /* 2 * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 #include <openssl/objects.h> 13 #include <openssl/x509.h> 14 #include <openssl/pem.h> 15 #include <openssl/x509v3.h> 16 #include <openssl/ocsp.h> 17 #include "ocsp_lcl.h" 18 19 /* 20 * Utility functions related to sending OCSP responses and extracting 21 * relevant information from the request. 22 */ 23 24 int OCSP_request_onereq_count(OCSP_REQUEST *req) 25 { 26 return sk_OCSP_ONEREQ_num(req->tbsRequest.requestList); 27 } 28 29 OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i) 30 { 31 return sk_OCSP_ONEREQ_value(req->tbsRequest.requestList, i); 32 } 33 34 OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one) 35 { 36 return one->reqCert; 37 } 38 39 int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd, 40 ASN1_OCTET_STRING **pikeyHash, 41 ASN1_INTEGER **pserial, OCSP_CERTID *cid) 42 { 43 if (!cid) 44 return 0; 45 if (pmd) 46 *pmd = cid->hashAlgorithm.algorithm; 47 if (piNameHash) 48 *piNameHash = &cid->issuerNameHash; 49 if (pikeyHash) 50 *pikeyHash = &cid->issuerKeyHash; 51 if (pserial) 52 *pserial = &cid->serialNumber; 53 return 1; 54 } 55 56 int OCSP_request_is_signed(OCSP_REQUEST *req) 57 { 58 if (req->optionalSignature) 59 return 1; 60 return 0; 61 } 62 63 /* Create an OCSP response and encode an optional basic response */ 64 OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs) 65 { 66 OCSP_RESPONSE *rsp = NULL; 67 68 if ((rsp = OCSP_RESPONSE_new()) == NULL) 69 goto err; 70 if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status))) 71 goto err; 72 if (!bs) 73 return rsp; 74 if ((rsp->responseBytes = OCSP_RESPBYTES_new()) == NULL) 75 goto err; 76 rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic); 77 if (!ASN1_item_pack 78 (bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response)) 79 goto err; 80 return rsp; 81 err: 82 OCSP_RESPONSE_free(rsp); 83 return NULL; 84 } 85 86 OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp, 87 OCSP_CERTID *cid, 88 int status, int reason, 89 ASN1_TIME *revtime, 90 ASN1_TIME *thisupd, 91 ASN1_TIME *nextupd) 92 { 93 OCSP_SINGLERESP *single = NULL; 94 OCSP_CERTSTATUS *cs; 95 OCSP_REVOKEDINFO *ri; 96 97 if (rsp->tbsResponseData.responses == NULL 98 && (rsp->tbsResponseData.responses 99 = sk_OCSP_SINGLERESP_new_null()) == NULL) 100 goto err; 101 102 if ((single = OCSP_SINGLERESP_new()) == NULL) 103 goto err; 104 105 if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate)) 106 goto err; 107 if (nextupd && 108 !ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate)) 109 goto err; 110 111 OCSP_CERTID_free(single->certId); 112 113 if ((single->certId = OCSP_CERTID_dup(cid)) == NULL) 114 goto err; 115 116 cs = single->certStatus; 117 switch (cs->type = status) { 118 case V_OCSP_CERTSTATUS_REVOKED: 119 if (!revtime) { 120 OCSPerr(OCSP_F_OCSP_BASIC_ADD1_STATUS, OCSP_R_NO_REVOKED_TIME); 121 goto err; 122 } 123 if ((cs->value.revoked = ri = OCSP_REVOKEDINFO_new()) == NULL) 124 goto err; 125 if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime)) 126 goto err; 127 if (reason != OCSP_REVOKED_STATUS_NOSTATUS) { 128 if ((ri->revocationReason = ASN1_ENUMERATED_new()) == NULL) 129 goto err; 130 if (!(ASN1_ENUMERATED_set(ri->revocationReason, reason))) 131 goto err; 132 } 133 break; 134 135 case V_OCSP_CERTSTATUS_GOOD: 136 if ((cs->value.good = ASN1_NULL_new()) == NULL) 137 goto err; 138 break; 139 140 case V_OCSP_CERTSTATUS_UNKNOWN: 141 if ((cs->value.unknown = ASN1_NULL_new()) == NULL) 142 goto err; 143 break; 144 145 default: 146 goto err; 147 148 } 149 if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData.responses, single))) 150 goto err; 151 return single; 152 err: 153 OCSP_SINGLERESP_free(single); 154 return NULL; 155 } 156 157 /* Add a certificate to an OCSP request */ 158 159 int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert) 160 { 161 if (resp->certs == NULL 162 && (resp->certs = sk_X509_new_null()) == NULL) 163 return 0; 164 165 if (!sk_X509_push(resp->certs, cert)) 166 return 0; 167 X509_up_ref(cert); 168 return 1; 169 } 170 171 /* 172 * Sign an OCSP response using the parameters contained in the digest context, 173 * set the responderID to the subject name in the signer's certificate, and 174 * include one or more optional certificates in the response. 175 */ 176 177 int OCSP_basic_sign_ctx(OCSP_BASICRESP *brsp, 178 X509 *signer, EVP_MD_CTX *ctx, 179 STACK_OF(X509) *certs, unsigned long flags) 180 { 181 int i; 182 OCSP_RESPID *rid; 183 EVP_PKEY *pkey; 184 185 if (ctx == NULL || EVP_MD_CTX_pkey_ctx(ctx) == NULL) { 186 OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX, OCSP_R_NO_SIGNER_KEY); 187 goto err; 188 } 189 190 pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx)); 191 if (pkey == NULL || !X509_check_private_key(signer, pkey)) { 192 OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX, 193 OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); 194 goto err; 195 } 196 197 if (!(flags & OCSP_NOCERTS)) { 198 if (!OCSP_basic_add1_cert(brsp, signer)) 199 goto err; 200 for (i = 0; i < sk_X509_num(certs); i++) { 201 X509 *tmpcert = sk_X509_value(certs, i); 202 if (!OCSP_basic_add1_cert(brsp, tmpcert)) 203 goto err; 204 } 205 } 206 207 rid = &brsp->tbsResponseData.responderId; 208 if (flags & OCSP_RESPID_KEY) { 209 if (!OCSP_RESPID_set_by_key(rid, signer)) 210 goto err; 211 } else if (!OCSP_RESPID_set_by_name(rid, signer)) { 212 goto err; 213 } 214 215 if (!(flags & OCSP_NOTIME) && 216 !X509_gmtime_adj(brsp->tbsResponseData.producedAt, 0)) 217 goto err; 218 219 /* 220 * Right now, I think that not doing double hashing is the right thing. 221 * -- Richard Levitte 222 */ 223 224 if (!OCSP_BASICRESP_sign_ctx(brsp, ctx, 0)) 225 goto err; 226 227 return 1; 228 err: 229 return 0; 230 } 231 232 int OCSP_basic_sign(OCSP_BASICRESP *brsp, 233 X509 *signer, EVP_PKEY *key, const EVP_MD *dgst, 234 STACK_OF(X509) *certs, unsigned long flags) 235 { 236 EVP_MD_CTX *ctx = EVP_MD_CTX_new(); 237 EVP_PKEY_CTX *pkctx = NULL; 238 int i; 239 240 if (ctx == NULL) 241 return 0; 242 243 if (!EVP_DigestSignInit(ctx, &pkctx, dgst, NULL, key)) { 244 EVP_MD_CTX_free(ctx); 245 return 0; 246 } 247 i = OCSP_basic_sign_ctx(brsp, signer, ctx, certs, flags); 248 EVP_MD_CTX_free(ctx); 249 return i; 250 } 251 252 int OCSP_RESPID_set_by_name(OCSP_RESPID *respid, X509 *cert) 253 { 254 if (!X509_NAME_set(&respid->value.byName, X509_get_subject_name(cert))) 255 return 0; 256 257 respid->type = V_OCSP_RESPID_NAME; 258 259 return 1; 260 } 261 262 int OCSP_RESPID_set_by_key(OCSP_RESPID *respid, X509 *cert) 263 { 264 ASN1_OCTET_STRING *byKey = NULL; 265 unsigned char md[SHA_DIGEST_LENGTH]; 266 267 /* RFC2560 requires SHA1 */ 268 if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL)) 269 return 0; 270 271 byKey = ASN1_OCTET_STRING_new(); 272 if (byKey == NULL) 273 return 0; 274 275 if (!(ASN1_OCTET_STRING_set(byKey, md, SHA_DIGEST_LENGTH))) { 276 ASN1_OCTET_STRING_free(byKey); 277 return 0; 278 } 279 280 respid->type = V_OCSP_RESPID_KEY; 281 respid->value.byKey = byKey; 282 283 return 1; 284 } 285 286 int OCSP_RESPID_match(OCSP_RESPID *respid, X509 *cert) 287 { 288 if (respid->type == V_OCSP_RESPID_KEY) { 289 unsigned char md[SHA_DIGEST_LENGTH]; 290 291 if (respid->value.byKey == NULL) 292 return 0; 293 294 /* RFC2560 requires SHA1 */ 295 if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL)) 296 return 0; 297 298 return (ASN1_STRING_length(respid->value.byKey) == SHA_DIGEST_LENGTH) 299 && (memcmp(ASN1_STRING_get0_data(respid->value.byKey), md, 300 SHA_DIGEST_LENGTH) == 0); 301 } else if (respid->type == V_OCSP_RESPID_NAME) { 302 if (respid->value.byName == NULL) 303 return 0; 304 305 return X509_NAME_cmp(respid->value.byName, 306 X509_get_subject_name(cert)) == 0; 307 } 308 309 return 0; 310 } 311