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_local.h"
18
19 /*
20 * Utility functions related to sending OCSP responses and extracting
21 * relevant information from the request.
22 */
23
OCSP_request_onereq_count(OCSP_REQUEST * req)24 int OCSP_request_onereq_count(OCSP_REQUEST *req)
25 {
26 return sk_OCSP_ONEREQ_num(req->tbsRequest.requestList);
27 }
28
OCSP_request_onereq_get0(OCSP_REQUEST * req,int i)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
OCSP_onereq_get0_id(OCSP_ONEREQ * one)34 OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)
35 {
36 return one->reqCert;
37 }
38
OCSP_id_get0_info(ASN1_OCTET_STRING ** piNameHash,ASN1_OBJECT ** pmd,ASN1_OCTET_STRING ** pikeyHash,ASN1_INTEGER ** pserial,OCSP_CERTID * cid)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
OCSP_request_is_signed(OCSP_REQUEST * req)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 */
OCSP_response_create(int status,OCSP_BASICRESP * bs)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
OCSP_basic_add1_status(OCSP_BASICRESP * rsp,OCSP_CERTID * cid,int status,int reason,ASN1_TIME * revtime,ASN1_TIME * thisupd,ASN1_TIME * nextupd)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
OCSP_basic_add1_cert(OCSP_BASICRESP * resp,X509 * cert)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
OCSP_basic_sign_ctx(OCSP_BASICRESP * brsp,X509 * signer,EVP_MD_CTX * ctx,STACK_OF (X509)* certs,unsigned long flags)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
OCSP_basic_sign(OCSP_BASICRESP * brsp,X509 * signer,EVP_PKEY * key,const EVP_MD * dgst,STACK_OF (X509)* certs,unsigned long flags)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
OCSP_RESPID_set_by_name(OCSP_RESPID * respid,X509 * cert)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
OCSP_RESPID_set_by_key(OCSP_RESPID * respid,X509 * cert)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
OCSP_RESPID_match(OCSP_RESPID * respid,X509 * cert)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