1 /*
2 * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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_local.h"
18
19 /*
20 * Utility functions related to sending OCSP responses and extracting
21 * relevant information from the request.
22 */
OCSP_request_onereq_count(OCSP_REQUEST * req)23 int OCSP_request_onereq_count(OCSP_REQUEST *req)
24 {
25 return sk_OCSP_ONEREQ_num(req->tbsRequest.requestList);
26 }
27
OCSP_request_onereq_get0(OCSP_REQUEST * req,int i)28 OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)
29 {
30 return sk_OCSP_ONEREQ_value(req->tbsRequest.requestList, i);
31 }
32
OCSP_onereq_get0_id(OCSP_ONEREQ * one)33 OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)
34 {
35 return one->reqCert;
36 }
37
OCSP_id_get0_info(ASN1_OCTET_STRING ** piNameHash,ASN1_OBJECT ** pmd,ASN1_OCTET_STRING ** pikeyHash,ASN1_INTEGER ** pserial,OCSP_CERTID * cid)38 int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
39 ASN1_OCTET_STRING **pikeyHash,
40 ASN1_INTEGER **pserial, OCSP_CERTID *cid)
41 {
42 if (!cid)
43 return 0;
44 if (pmd)
45 *pmd = cid->hashAlgorithm.algorithm;
46 if (piNameHash)
47 *piNameHash = &cid->issuerNameHash;
48 if (pikeyHash)
49 *pikeyHash = &cid->issuerKeyHash;
50 if (pserial)
51 *pserial = &cid->serialNumber;
52 return 1;
53 }
54
OCSP_request_is_signed(OCSP_REQUEST * req)55 int OCSP_request_is_signed(OCSP_REQUEST *req)
56 {
57 if (req->optionalSignature)
58 return 1;
59 return 0;
60 }
61
62 /* Create an OCSP response and encode an optional basic response */
OCSP_response_create(int status,OCSP_BASICRESP * bs)63 OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs)
64 {
65 OCSP_RESPONSE *rsp = NULL;
66
67 if ((rsp = OCSP_RESPONSE_new()) == NULL)
68 goto err;
69 if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status)))
70 goto err;
71 if (!bs)
72 return rsp;
73 if ((rsp->responseBytes = OCSP_RESPBYTES_new()) == NULL)
74 goto err;
75 rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);
76 if (!ASN1_item_pack
77 (bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response))
78 goto err;
79 return rsp;
80 err:
81 OCSP_RESPONSE_free(rsp);
82 return NULL;
83 }
84
OCSP_basic_add1_status(OCSP_BASICRESP * rsp,OCSP_CERTID * cid,int status,int reason,ASN1_TIME * revtime,ASN1_TIME * thisupd,ASN1_TIME * nextupd)85 OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp,
86 OCSP_CERTID *cid,
87 int status, int reason,
88 ASN1_TIME *revtime,
89 ASN1_TIME *thisupd,
90 ASN1_TIME *nextupd)
91 {
92 OCSP_SINGLERESP *single = NULL;
93 OCSP_CERTSTATUS *cs;
94 OCSP_REVOKEDINFO *ri;
95
96 if (rsp->tbsResponseData.responses == NULL
97 && (rsp->tbsResponseData.responses
98 = sk_OCSP_SINGLERESP_new_null()) == NULL)
99 goto err;
100
101 if ((single = OCSP_SINGLERESP_new()) == NULL)
102 goto err;
103
104 if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))
105 goto err;
106 if (nextupd &&
107 !ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))
108 goto err;
109
110 OCSP_CERTID_free(single->certId);
111
112 if ((single->certId = OCSP_CERTID_dup(cid)) == NULL)
113 goto err;
114
115 cs = single->certStatus;
116 switch (cs->type = status) {
117 case V_OCSP_CERTSTATUS_REVOKED:
118 if (!revtime) {
119 ERR_raise(ERR_LIB_OCSP, OCSP_R_NO_REVOKED_TIME);
120 goto err;
121 }
122 if ((cs->value.revoked = ri = OCSP_REVOKEDINFO_new()) == NULL)
123 goto err;
124 if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))
125 goto err;
126 if (reason != OCSP_REVOKED_STATUS_NOSTATUS) {
127 if ((ri->revocationReason = ASN1_ENUMERATED_new()) == NULL)
128 goto err;
129 if (!(ASN1_ENUMERATED_set(ri->revocationReason, reason)))
130 goto err;
131 }
132 break;
133
134 case V_OCSP_CERTSTATUS_GOOD:
135 if ((cs->value.good = ASN1_NULL_new()) == NULL)
136 goto err;
137 break;
138
139 case V_OCSP_CERTSTATUS_UNKNOWN:
140 if ((cs->value.unknown = ASN1_NULL_new()) == NULL)
141 goto err;
142 break;
143
144 default:
145 goto err;
146
147 }
148 if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData.responses, single)))
149 goto err;
150 return single;
151 err:
152 OCSP_SINGLERESP_free(single);
153 return NULL;
154 }
155
156 /* Add a certificate to an OCSP request */
OCSP_basic_add1_cert(OCSP_BASICRESP * resp,X509 * cert)157 int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)
158 {
159 return ossl_x509_add_cert_new(&resp->certs, cert, X509_ADD_FLAG_UP_REF);
160 }
161
162 /*
163 * Sign an OCSP response using the parameters contained in the digest context,
164 * set the responderID to the subject name in the signer's certificate, and
165 * include one or more optional certificates in the response.
166 */
OCSP_basic_sign_ctx(OCSP_BASICRESP * brsp,X509 * signer,EVP_MD_CTX * ctx,STACK_OF (X509)* certs,unsigned long flags)167 int OCSP_basic_sign_ctx(OCSP_BASICRESP *brsp,
168 X509 *signer, EVP_MD_CTX *ctx,
169 STACK_OF(X509) *certs, unsigned long flags)
170 {
171 OCSP_RESPID *rid;
172 EVP_PKEY *pkey;
173
174 if (ctx == NULL || EVP_MD_CTX_get_pkey_ctx(ctx) == NULL) {
175 ERR_raise(ERR_LIB_OCSP, OCSP_R_NO_SIGNER_KEY);
176 goto err;
177 }
178
179 pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_get_pkey_ctx(ctx));
180 if (pkey == NULL || !X509_check_private_key(signer, pkey)) {
181 ERR_raise(ERR_LIB_OCSP, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
182 goto err;
183 }
184
185 if (!(flags & OCSP_NOCERTS)) {
186 if (!OCSP_basic_add1_cert(brsp, signer)
187 || !X509_add_certs(brsp->certs, certs, X509_ADD_FLAG_UP_REF))
188 goto err;
189 }
190
191 rid = &brsp->tbsResponseData.responderId;
192 if (flags & OCSP_RESPID_KEY) {
193 if (!OCSP_RESPID_set_by_key(rid, signer))
194 goto err;
195 } else if (!OCSP_RESPID_set_by_name(rid, signer)) {
196 goto err;
197 }
198
199 if (!(flags & OCSP_NOTIME) &&
200 !X509_gmtime_adj(brsp->tbsResponseData.producedAt, 0))
201 goto err;
202
203 /*
204 * Right now, I think that not doing double hashing is the right thing.
205 * -- Richard Levitte
206 */
207 if (!OCSP_BASICRESP_sign_ctx(brsp, ctx, 0))
208 goto err;
209
210 return 1;
211 err:
212 return 0;
213 }
214
OCSP_basic_sign(OCSP_BASICRESP * brsp,X509 * signer,EVP_PKEY * key,const EVP_MD * dgst,STACK_OF (X509)* certs,unsigned long flags)215 int OCSP_basic_sign(OCSP_BASICRESP *brsp,
216 X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,
217 STACK_OF(X509) *certs, unsigned long flags)
218 {
219 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
220 EVP_PKEY_CTX *pkctx = NULL;
221 int i;
222
223 if (ctx == NULL)
224 return 0;
225
226 if (!EVP_DigestSignInit_ex(ctx, &pkctx, EVP_MD_get0_name(dgst),
227 signer->libctx, signer->propq, key, NULL)) {
228 EVP_MD_CTX_free(ctx);
229 return 0;
230 }
231 i = OCSP_basic_sign_ctx(brsp, signer, ctx, certs, flags);
232 EVP_MD_CTX_free(ctx);
233 return i;
234 }
235
OCSP_RESPID_set_by_name(OCSP_RESPID * respid,X509 * cert)236 int OCSP_RESPID_set_by_name(OCSP_RESPID *respid, X509 *cert)
237 {
238 if (!X509_NAME_set(&respid->value.byName, X509_get_subject_name(cert)))
239 return 0;
240
241 respid->type = V_OCSP_RESPID_NAME;
242
243 return 1;
244 }
245
OCSP_RESPID_set_by_key_ex(OCSP_RESPID * respid,X509 * cert,OSSL_LIB_CTX * libctx,const char * propq)246 int OCSP_RESPID_set_by_key_ex(OCSP_RESPID *respid, X509 *cert,
247 OSSL_LIB_CTX *libctx, const char *propq)
248 {
249 ASN1_OCTET_STRING *byKey = NULL;
250 unsigned char md[SHA_DIGEST_LENGTH];
251 EVP_MD *sha1 = EVP_MD_fetch(libctx, "SHA1", propq);
252 int ret = 0;
253
254 if (sha1 == NULL)
255 return 0;
256
257 /* RFC2560 requires SHA1 */
258 if (!X509_pubkey_digest(cert, sha1, md, NULL))
259 goto err;
260
261 byKey = ASN1_OCTET_STRING_new();
262 if (byKey == NULL)
263 goto err;
264
265 if (!(ASN1_OCTET_STRING_set(byKey, md, SHA_DIGEST_LENGTH))) {
266 ASN1_OCTET_STRING_free(byKey);
267 goto err;
268 }
269
270 respid->type = V_OCSP_RESPID_KEY;
271 respid->value.byKey = byKey;
272
273 ret = 1;
274 err:
275 EVP_MD_free(sha1);
276 return ret;
277 }
278
OCSP_RESPID_set_by_key(OCSP_RESPID * respid,X509 * cert)279 int OCSP_RESPID_set_by_key(OCSP_RESPID *respid, X509 *cert)
280 {
281 if (cert == NULL)
282 return 0;
283 return OCSP_RESPID_set_by_key_ex(respid, cert, cert->libctx, cert->propq);
284 }
285
OCSP_RESPID_match_ex(OCSP_RESPID * respid,X509 * cert,OSSL_LIB_CTX * libctx,const char * propq)286 int OCSP_RESPID_match_ex(OCSP_RESPID *respid, X509 *cert, OSSL_LIB_CTX *libctx,
287 const char *propq)
288 {
289 EVP_MD *sha1 = NULL;
290 int ret = 0;
291
292 if (respid->type == V_OCSP_RESPID_KEY) {
293 unsigned char md[SHA_DIGEST_LENGTH];
294
295 sha1 = EVP_MD_fetch(libctx, "SHA1", propq);
296 if (sha1 == NULL)
297 goto err;
298
299 if (respid->value.byKey == NULL)
300 goto err;
301
302 /* RFC2560 requires SHA1 */
303 if (!X509_pubkey_digest(cert, sha1, md, NULL))
304 goto err;
305
306 ret = (ASN1_STRING_length(respid->value.byKey) == SHA_DIGEST_LENGTH)
307 && (memcmp(ASN1_STRING_get0_data(respid->value.byKey), md,
308 SHA_DIGEST_LENGTH) == 0);
309 } else if (respid->type == V_OCSP_RESPID_NAME) {
310 if (respid->value.byName == NULL)
311 return 0;
312
313 return X509_NAME_cmp(respid->value.byName,
314 X509_get_subject_name(cert)) == 0;
315 }
316
317 err:
318 EVP_MD_free(sha1);
319 return ret;
320 }
321
OCSP_RESPID_match(OCSP_RESPID * respid,X509 * cert)322 int OCSP_RESPID_match(OCSP_RESPID *respid, X509 *cert)
323 {
324 if (cert == NULL)
325 return 0;
326 return OCSP_RESPID_match_ex(respid, cert, cert->libctx, cert->propq);
327 }
328