1 | /* |
2 | * Copyright 2001-2018 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 | */ |
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 | |