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31b28ad9 | 1 | /* |
b6461792 | 2 | * Copyright 2007-2024 The OpenSSL Project Authors. All Rights Reserved. |
31b28ad9 DDO |
3 | * Copyright Nokia 2007-2020 |
4 | * Copyright Siemens AG 2015-2020 | |
5 | * | |
6 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
10 | */ | |
11 | ||
12 | /* CMP functions for PKIMessage checking */ | |
13 | ||
14 | #include "cmp_local.h" | |
15 | #include <openssl/cmp_util.h> | |
16 | ||
17 | /* explicit #includes not strictly needed since implied by the above: */ | |
18 | #include <openssl/asn1t.h> | |
19 | #include <openssl/cmp.h> | |
20 | #include <openssl/crmf.h> | |
21 | #include <openssl/err.h> | |
22 | #include <openssl/x509.h> | |
31b28ad9 | 23 | |
23000838 | 24 | /* Verify a message protected by signature according to RFC section 5.1.3.3 */ |
31b28ad9 DDO |
25 | static int verify_signature(const OSSL_CMP_CTX *cmp_ctx, |
26 | const OSSL_CMP_MSG *msg, X509 *cert) | |
27 | { | |
642f60d8 | 28 | OSSL_CMP_PROTECTEDPART prot_part; |
31b28ad9 | 29 | EVP_PKEY *pubkey = NULL; |
374d5cf2 | 30 | BIO *bio; |
31b28ad9 DDO |
31 | int res = 0; |
32 | ||
33 | if (!ossl_assert(cmp_ctx != NULL && msg != NULL && cert != NULL)) | |
34 | return 0; | |
35 | ||
374d5cf2 | 36 | bio = BIO_new(BIO_s_mem()); /* may be NULL */ |
ecf60b9e | 37 | if (bio == NULL) |
318e9799 | 38 | return 0; |
31b28ad9 DDO |
39 | /* verify that keyUsage, if present, contains digitalSignature */ |
40 | if (!cmp_ctx->ignore_keyusage | |
41 | && (X509_get_key_usage(cert) & X509v3_KU_DIGITAL_SIGNATURE) == 0) { | |
9311d0c4 | 42 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_KEY_USAGE_DIGITALSIGNATURE); |
31b28ad9 DDO |
43 | goto sig_err; |
44 | } | |
45 | ||
46 | pubkey = X509_get_pubkey(cert); | |
47 | if (pubkey == NULL) { | |
9311d0c4 | 48 | ERR_raise(ERR_LIB_CMP, CMP_R_FAILED_EXTRACTING_PUBKEY); |
31b28ad9 DDO |
49 | goto sig_err; |
50 | } | |
51 | ||
31b28ad9 DDO |
52 | prot_part.header = msg->header; |
53 | prot_part.body = msg->body; | |
54 | ||
d8652be0 MC |
55 | if (ASN1_item_verify_ex(ASN1_ITEM_rptr(OSSL_CMP_PROTECTEDPART), |
56 | msg->header->protectionAlg, msg->protection, | |
57 | &prot_part, NULL, pubkey, cmp_ctx->libctx, | |
58 | cmp_ctx->propq) > 0) { | |
31b28ad9 DDO |
59 | res = 1; |
60 | goto end; | |
61 | } | |
62 | ||
63 | sig_err: | |
4669015d | 64 | res = ossl_x509_print_ex_brief(bio, cert, X509_FLAG_NO_EXTENSIONS); |
9311d0c4 | 65 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_VALIDATING_SIGNATURE); |
31b28ad9 DDO |
66 | if (res) |
67 | ERR_add_error_mem_bio("\n", bio); | |
68 | res = 0; | |
69 | ||
70 | end: | |
31b28ad9 DDO |
71 | EVP_PKEY_free(pubkey); |
72 | BIO_free(bio); | |
73 | ||
74 | return res; | |
75 | } | |
76 | ||
77 | /* Verify a message protected with PBMAC */ | |
6d1f50b5 | 78 | static int verify_PBMAC(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg) |
31b28ad9 DDO |
79 | { |
80 | ASN1_BIT_STRING *protection = NULL; | |
81 | int valid = 0; | |
82 | ||
83 | /* generate expected protection for the message */ | |
6d1f50b5 | 84 | if ((protection = ossl_cmp_calc_protection(ctx, msg)) == NULL) |
31b28ad9 DDO |
85 | return 0; /* failed to generate protection string! */ |
86 | ||
87 | valid = msg->protection != NULL && msg->protection->length >= 0 | |
88 | && msg->protection->type == protection->type | |
89 | && msg->protection->length == protection->length | |
90 | && CRYPTO_memcmp(msg->protection->data, protection->data, | |
91 | protection->length) == 0; | |
92 | ASN1_BIT_STRING_free(protection); | |
93 | if (!valid) | |
9311d0c4 | 94 | ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_PBM_VALUE); |
31b28ad9 DDO |
95 | |
96 | return valid; | |
97 | } | |
98 | ||
c4a9e3eb | 99 | /*- |
31b28ad9 DDO |
100 | * Attempt to validate certificate and path using any given store with trusted |
101 | * certs (possibly including CRLs and a cert verification callback function) | |
102 | * and non-trusted intermediate certs from the given ctx. | |
103 | * | |
104 | * Returns 1 on successful validation and 0 otherwise. | |
105 | */ | |
c4a9e3eb DDO |
106 | int OSSL_CMP_validate_cert_path(const OSSL_CMP_CTX *ctx, |
107 | X509_STORE *trusted_store, X509 *cert) | |
31b28ad9 DDO |
108 | { |
109 | int valid = 0; | |
110 | X509_STORE_CTX *csc = NULL; | |
111 | int err; | |
112 | ||
113 | if (ctx == NULL || cert == NULL) { | |
9311d0c4 | 114 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
31b28ad9 DDO |
115 | return 0; |
116 | } | |
117 | ||
118 | if (trusted_store == NULL) { | |
9311d0c4 | 119 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_TRUST_STORE); |
31b28ad9 DDO |
120 | return 0; |
121 | } | |
122 | ||
d8652be0 | 123 | if ((csc = X509_STORE_CTX_new_ex(ctx->libctx, ctx->propq)) == NULL |
31b28ad9 | 124 | || !X509_STORE_CTX_init(csc, trusted_store, |
0b86eefd | 125 | cert, ctx->untrusted)) |
31b28ad9 DDO |
126 | goto err; |
127 | ||
128 | valid = X509_verify_cert(csc) > 0; | |
129 | ||
130 | /* make sure suitable error is queued even if callback did not do */ | |
131 | err = ERR_peek_last_error(); | |
132 | if (!valid && ERR_GET_REASON(err) != CMP_R_POTENTIALLY_INVALID_CERTIFICATE) | |
9311d0c4 | 133 | ERR_raise(ERR_LIB_CMP, CMP_R_POTENTIALLY_INVALID_CERTIFICATE); |
31b28ad9 DDO |
134 | |
135 | err: | |
a1e4c8ef DDO |
136 | /* directly output any fresh errors, needed for check_msg_find_cert() */ |
137 | OSSL_CMP_CTX_print_errors(ctx); | |
31b28ad9 DDO |
138 | X509_STORE_CTX_free(csc); |
139 | return valid; | |
140 | } | |
141 | ||
080bd08f DDO |
142 | static int verify_cb_cert(X509_STORE *ts, X509 *cert, int err) |
143 | { | |
144 | X509_STORE_CTX_verify_cb verify_cb; | |
145 | X509_STORE_CTX *csc; | |
146 | int ok = 0; | |
147 | ||
148 | if (ts == NULL || (verify_cb = X509_STORE_get_verify_cb(ts)) == NULL) | |
149 | return ok; | |
150 | if ((csc = X509_STORE_CTX_new()) != NULL | |
151 | && X509_STORE_CTX_init(csc, ts, cert, NULL)) { | |
152 | X509_STORE_CTX_set_error(csc, err); | |
153 | X509_STORE_CTX_set_current_cert(csc, cert); | |
154 | ok = (*verify_cb)(0, csc); | |
155 | } | |
156 | X509_STORE_CTX_free(csc); | |
157 | return ok; | |
158 | } | |
159 | ||
31b28ad9 | 160 | /* Return 0 if expect_name != NULL and there is no matching actual_name */ |
c4a9e3eb | 161 | static int check_name(const OSSL_CMP_CTX *ctx, int log_success, |
31b28ad9 DDO |
162 | const char *actual_desc, const X509_NAME *actual_name, |
163 | const char *expect_desc, const X509_NAME *expect_name) | |
164 | { | |
165 | char *str; | |
166 | ||
167 | if (expect_name == NULL) | |
168 | return 1; /* no expectation, thus trivially fulfilled */ | |
169 | ||
170 | /* make sure that a matching name is there */ | |
171 | if (actual_name == NULL) { | |
172 | ossl_cmp_log1(WARN, ctx, "missing %s", actual_desc); | |
173 | return 0; | |
174 | } | |
ca6f1ba9 DDO |
175 | str = X509_NAME_oneline(actual_name, NULL, 0); |
176 | if (X509_NAME_cmp(actual_name, expect_name) == 0) { | |
177 | if (log_success && str != NULL) | |
f21409fa DDO |
178 | ossl_cmp_log3(INFO, ctx, " %s matches %s: %s", |
179 | actual_desc, expect_desc, str); | |
ca6f1ba9 | 180 | OPENSSL_free(str); |
31b28ad9 | 181 | return 1; |
ca6f1ba9 | 182 | } |
31b28ad9 | 183 | |
ca6f1ba9 | 184 | if (str != NULL) |
31b28ad9 DDO |
185 | ossl_cmp_log2(INFO, ctx, " actual name in %s = %s", actual_desc, str); |
186 | OPENSSL_free(str); | |
187 | if ((str = X509_NAME_oneline(expect_name, NULL, 0)) != NULL) | |
188 | ossl_cmp_log2(INFO, ctx, " does not match %s = %s", expect_desc, str); | |
189 | OPENSSL_free(str); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /* Return 0 if skid != NULL and there is no matching subject key ID in cert */ | |
c4a9e3eb DDO |
194 | static int check_kid(const OSSL_CMP_CTX *ctx, |
195 | const ASN1_OCTET_STRING *ckid, | |
196 | const ASN1_OCTET_STRING *skid) | |
31b28ad9 | 197 | { |
ca6f1ba9 | 198 | char *str; |
31b28ad9 DDO |
199 | |
200 | if (skid == NULL) | |
201 | return 1; /* no expectation, thus trivially fulfilled */ | |
202 | ||
203 | /* make sure that the expected subject key identifier is there */ | |
204 | if (ckid == NULL) { | |
205 | ossl_cmp_warn(ctx, "missing Subject Key Identifier in certificate"); | |
206 | return 0; | |
207 | } | |
a3ea35c2 | 208 | str = i2s_ASN1_OCTET_STRING(NULL, ckid); |
ca6f1ba9 DDO |
209 | if (ASN1_OCTET_STRING_cmp(ckid, skid) == 0) { |
210 | if (str != NULL) | |
211 | ossl_cmp_log1(INFO, ctx, " subjectKID matches senderKID: %s", str); | |
212 | OPENSSL_free(str); | |
31b28ad9 | 213 | return 1; |
ca6f1ba9 | 214 | } |
31b28ad9 | 215 | |
ca6f1ba9 DDO |
216 | if (str != NULL) |
217 | ossl_cmp_log1(INFO, ctx, " cert Subject Key Identifier = %s", str); | |
218 | OPENSSL_free(str); | |
a3ea35c2 | 219 | if ((str = i2s_ASN1_OCTET_STRING(NULL, skid)) != NULL) |
ca6f1ba9 DDO |
220 | ossl_cmp_log1(INFO, ctx, " does not match senderKID = %s", str); |
221 | OPENSSL_free(str); | |
31b28ad9 DDO |
222 | return 0; |
223 | } | |
224 | ||
c4a9e3eb DDO |
225 | static int already_checked(const X509 *cert, |
226 | const STACK_OF(X509) *already_checked) | |
31b28ad9 DDO |
227 | { |
228 | int i; | |
229 | ||
230 | for (i = sk_X509_num(already_checked /* may be NULL */); i > 0; i--) | |
231 | if (X509_cmp(sk_X509_value(already_checked, i - 1), cert) == 0) | |
232 | return 1; | |
233 | return 0; | |
234 | } | |
235 | ||
c4a9e3eb | 236 | /*- |
31b28ad9 DDO |
237 | * Check if the given cert is acceptable as sender cert of the given message. |
238 | * The subject DN must match, the subject key ID as well if present in the msg, | |
239 | * and the cert must be current (checked if ctx->trusted is not NULL). | |
240 | * Note that cert revocation etc. is checked by OSSL_CMP_validate_cert_path(). | |
241 | * | |
242 | * Returns 0 on error or not acceptable, else 1. | |
243 | */ | |
c4a9e3eb | 244 | static int cert_acceptable(const OSSL_CMP_CTX *ctx, |
31b28ad9 DDO |
245 | const char *desc1, const char *desc2, X509 *cert, |
246 | const STACK_OF(X509) *already_checked1, | |
247 | const STACK_OF(X509) *already_checked2, | |
248 | const OSSL_CMP_MSG *msg) | |
249 | { | |
250 | X509_STORE *ts = ctx->trusted; | |
a1e4c8ef DDO |
251 | int self_issued = X509_check_issued(cert, cert) == X509_V_OK; |
252 | char *str; | |
31b28ad9 DDO |
253 | X509_VERIFY_PARAM *vpm = ts != NULL ? X509_STORE_get0_param(ts) : NULL; |
254 | int time_cmp; | |
255 | ||
a1e4c8ef DDO |
256 | ossl_cmp_log3(INFO, ctx, " considering %s%s %s with..", |
257 | self_issued ? "self-issued ": "", desc1, desc2); | |
258 | if ((str = X509_NAME_oneline(X509_get_subject_name(cert), NULL, 0)) != NULL) | |
259 | ossl_cmp_log1(INFO, ctx, " subject = %s", str); | |
260 | OPENSSL_free(str); | |
261 | if (!self_issued) { | |
262 | str = X509_NAME_oneline(X509_get_issuer_name(cert), NULL, 0); | |
263 | if (str != NULL) | |
264 | ossl_cmp_log1(INFO, ctx, " issuer = %s", str); | |
265 | OPENSSL_free(str); | |
266 | } | |
31b28ad9 DDO |
267 | |
268 | if (already_checked(cert, already_checked1) | |
269 | || already_checked(cert, already_checked2)) { | |
270 | ossl_cmp_info(ctx, " cert has already been checked"); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | time_cmp = X509_cmp_timeframe(vpm, X509_get0_notBefore(cert), | |
275 | X509_get0_notAfter(cert)); | |
276 | if (time_cmp != 0) { | |
080bd08f DDO |
277 | int err = time_cmp > 0 ? X509_V_ERR_CERT_HAS_EXPIRED |
278 | : X509_V_ERR_CERT_NOT_YET_VALID; | |
279 | ||
31b28ad9 DDO |
280 | ossl_cmp_warn(ctx, time_cmp > 0 ? "cert has expired" |
281 | : "cert is not yet valid"); | |
080bd08f DDO |
282 | if (ctx->log_cb != NULL /* logging not temporarily disabled */ |
283 | && verify_cb_cert(ts, cert, err) <= 0) | |
284 | return 0; | |
31b28ad9 DDO |
285 | } |
286 | ||
ca6f1ba9 | 287 | if (!check_name(ctx, 1, |
31b28ad9 DDO |
288 | "cert subject", X509_get_subject_name(cert), |
289 | "sender field", msg->header->sender->d.directoryName)) | |
290 | return 0; | |
291 | ||
c4a9e3eb | 292 | if (!check_kid(ctx, X509_get0_subject_key_id(cert), msg->header->senderKID)) |
31b28ad9 | 293 | return 0; |
23000838 | 294 | /* prevent misleading error later in case x509v3_cache_extensions() fails */ |
4669015d | 295 | if (!ossl_x509v3_cache_extensions(cert)) { |
23000838 DDO |
296 | ossl_cmp_warn(ctx, "cert appears to be invalid"); |
297 | return 0; | |
298 | } | |
7b1a3a50 DDO |
299 | if (!verify_signature(ctx, msg, cert)) { |
300 | ossl_cmp_warn(ctx, "msg signature verification failed"); | |
301 | return 0; | |
302 | } | |
31b28ad9 | 303 | /* acceptable also if there is no senderKID in msg header */ |
a1e4c8ef | 304 | ossl_cmp_info(ctx, " cert seems acceptable"); |
31b28ad9 DDO |
305 | return 1; |
306 | } | |
307 | ||
7b1a3a50 DDO |
308 | static int check_cert_path(const OSSL_CMP_CTX *ctx, X509_STORE *store, |
309 | X509 *scrt) | |
31b28ad9 | 310 | { |
a1e4c8ef DDO |
311 | if (OSSL_CMP_validate_cert_path(ctx, store, scrt)) |
312 | return 1; | |
313 | ||
314 | ossl_cmp_warn(ctx, | |
315 | "msg signature validates but cert path validation failed"); | |
316 | return 0; | |
31b28ad9 DDO |
317 | } |
318 | ||
319 | /* | |
320 | * Exceptional handling for 3GPP TS 33.310 [3G/LTE Network Domain Security | |
a1e4c8ef DDO |
321 | * (NDS); Authentication Framework (AF)], only to use for IP messages |
322 | * and if the ctx option is explicitly set: use self-issued certificates | |
7b1a3a50 | 323 | * from extraCerts as trust anchor to validate sender cert - |
31b28ad9 DDO |
324 | * provided it also can validate the newly enrolled certificate |
325 | */ | |
7b1a3a50 DDO |
326 | static int check_cert_path_3gpp(const OSSL_CMP_CTX *ctx, |
327 | const OSSL_CMP_MSG *msg, X509 *scrt) | |
31b28ad9 DDO |
328 | { |
329 | int valid = 0; | |
a1e4c8ef DDO |
330 | X509_STORE *store; |
331 | ||
332 | if (!ctx->permitTAInExtraCertsForIR) | |
333 | return 0; | |
31b28ad9 | 334 | |
a1e4c8ef DDO |
335 | if ((store = X509_STORE_new()) == NULL |
336 | || !ossl_cmp_X509_STORE_add1_certs(store, msg->extraCerts, | |
337 | 1 /* self-issued only */)) | |
338 | goto err; | |
339 | ||
340 | /* store does not include CRLs */ | |
341 | valid = OSSL_CMP_validate_cert_path(ctx, store, scrt); | |
342 | if (!valid) { | |
343 | ossl_cmp_warn(ctx, | |
344 | "also exceptional 3GPP mode cert path validation failed"); | |
345 | } else { | |
31b28ad9 | 346 | /* |
a1e4c8ef DDO |
347 | * verify that the newly enrolled certificate (which assumed rid == |
348 | * OSSL_CMP_CERTREQID) can also be validated with the same trusted store | |
31b28ad9 | 349 | */ |
31b28ad9 | 350 | OSSL_CMP_CERTRESPONSE *crep = |
a1e4c8ef DDO |
351 | ossl_cmp_certrepmessage_get0_certresponse(msg->body->value.ip, |
352 | OSSL_CMP_CERTREQID); | |
e0f1ec3b | 353 | X509 *newcrt = ossl_cmp_certresponse_get1_cert(ctx, crep); |
357bfe73 | 354 | |
31b28ad9 DDO |
355 | /* |
356 | * maybe better use get_cert_status() from cmp_client.c, which catches | |
357 | * errors | |
358 | */ | |
359 | valid = OSSL_CMP_validate_cert_path(ctx, store, newcrt); | |
360 | X509_free(newcrt); | |
361 | } | |
a1e4c8ef DDO |
362 | |
363 | err: | |
31b28ad9 DDO |
364 | X509_STORE_free(store); |
365 | return valid; | |
366 | } | |
367 | ||
c4a9e3eb | 368 | static int check_msg_given_cert(const OSSL_CMP_CTX *ctx, X509 *cert, |
ca6f1ba9 DDO |
369 | const OSSL_CMP_MSG *msg) |
370 | { | |
371 | return cert_acceptable(ctx, "previously validated", "sender cert", | |
372 | cert, NULL, NULL, msg) | |
7b1a3a50 DDO |
373 | && (check_cert_path(ctx, ctx->trusted, cert) |
374 | || check_cert_path_3gpp(ctx, msg, cert)); | |
ca6f1ba9 DDO |
375 | } |
376 | ||
c4a9e3eb | 377 | /*- |
31b28ad9 DDO |
378 | * Try all certs in given list for verifying msg, normally or in 3GPP mode. |
379 | * If already_checked1 == NULL then certs are assumed to be the msg->extraCerts. | |
b6fbef11 | 380 | * On success cache the found cert using ossl_cmp_ctx_set1_validatedSrvCert(). |
31b28ad9 | 381 | */ |
c4a9e3eb | 382 | static int check_msg_with_certs(OSSL_CMP_CTX *ctx, const STACK_OF(X509) *certs, |
31b28ad9 DDO |
383 | const char *desc, |
384 | const STACK_OF(X509) *already_checked1, | |
385 | const STACK_OF(X509) *already_checked2, | |
386 | const OSSL_CMP_MSG *msg, int mode_3gpp) | |
387 | { | |
388 | int in_extraCerts = already_checked1 == NULL; | |
389 | int n_acceptable_certs = 0; | |
390 | int i; | |
391 | ||
392 | if (sk_X509_num(certs) <= 0) { | |
393 | ossl_cmp_log1(WARN, ctx, "no %s", desc); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | for (i = 0; i < sk_X509_num(certs); i++) { /* certs may be NULL */ | |
398 | X509 *cert = sk_X509_value(certs, i); | |
399 | ||
400 | if (!ossl_assert(cert != NULL)) | |
401 | return 0; | |
402 | if (!cert_acceptable(ctx, "cert from", desc, cert, | |
403 | already_checked1, already_checked2, msg)) | |
404 | continue; | |
405 | n_acceptable_certs++; | |
7b1a3a50 DDO |
406 | if (mode_3gpp ? check_cert_path_3gpp(ctx, msg, cert) |
407 | : check_cert_path(ctx, ctx->trusted, cert)) { | |
31b28ad9 | 408 | /* store successful sender cert for further msgs in transaction */ |
b6fbef11 | 409 | return ossl_cmp_ctx_set1_validatedSrvCert(ctx, cert); |
31b28ad9 DDO |
410 | } |
411 | } | |
412 | if (in_extraCerts && n_acceptable_certs == 0) | |
413 | ossl_cmp_warn(ctx, "no acceptable cert in extraCerts"); | |
414 | return 0; | |
415 | } | |
416 | ||
c4a9e3eb | 417 | /*- |
0b86eefd | 418 | * Verify msg trying first ctx->untrusted, which should include extraCerts |
31b28ad9 | 419 | * at its front, then trying the trusted certs in truststore (if any) of ctx. |
b6fbef11 | 420 | * On success cache the found cert using ossl_cmp_ctx_set1_validatedSrvCert(). |
31b28ad9 DDO |
421 | */ |
422 | static int check_msg_all_certs(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg, | |
423 | int mode_3gpp) | |
424 | { | |
425 | int ret = 0; | |
426 | ||
2464d8dc DDO |
427 | if (ctx->permitTAInExtraCertsForIR |
428 | && OSSL_CMP_MSG_get_bodytype(msg) == OSSL_CMP_PKIBODY_IP) | |
429 | ossl_cmp_info(ctx, mode_3gpp ? | |
430 | "normal mode failed; trying now 3GPP mode trusting extraCerts" | |
431 | : "trying first normal mode using trust store"); | |
432 | else if (mode_3gpp) | |
a1e4c8ef DDO |
433 | return 0; |
434 | ||
31b28ad9 DDO |
435 | if (check_msg_with_certs(ctx, msg->extraCerts, "extraCerts", |
436 | NULL, NULL, msg, mode_3gpp)) | |
437 | return 1; | |
0b86eefd | 438 | if (check_msg_with_certs(ctx, ctx->untrusted, "untrusted certs", |
31b28ad9 DDO |
439 | msg->extraCerts, NULL, msg, mode_3gpp)) |
440 | return 1; | |
441 | ||
442 | if (ctx->trusted == NULL) { | |
443 | ossl_cmp_warn(ctx, mode_3gpp ? "no self-issued extraCerts" | |
444 | : "no trusted store"); | |
445 | } else { | |
446 | STACK_OF(X509) *trusted = X509_STORE_get1_all_certs(ctx->trusted); | |
357bfe73 | 447 | |
31b28ad9 DDO |
448 | ret = check_msg_with_certs(ctx, trusted, |
449 | mode_3gpp ? "self-issued extraCerts" | |
450 | : "certs in trusted store", | |
0b86eefd | 451 | msg->extraCerts, ctx->untrusted, |
31b28ad9 | 452 | msg, mode_3gpp); |
79b2a2f2 | 453 | OSSL_STACK_OF_X509_free(trusted); |
31b28ad9 DDO |
454 | } |
455 | return ret; | |
456 | } | |
457 | ||
c4a9e3eb DDO |
458 | /*- |
459 | * Verify message signature with any acceptable and valid candidate cert. | |
b6fbef11 | 460 | * On success cache the found cert using ossl_cmp_ctx_set1_validatedSrvCert(). |
c4a9e3eb | 461 | */ |
31b28ad9 DDO |
462 | static int check_msg_find_cert(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg) |
463 | { | |
464 | X509 *scrt = ctx->validatedSrvCert; /* previous successful sender cert */ | |
465 | GENERAL_NAME *sender = msg->header->sender; | |
466 | char *sname = NULL; | |
467 | char *skid_str = NULL; | |
468 | const ASN1_OCTET_STRING *skid = msg->header->senderKID; | |
7e765f46 | 469 | OSSL_CMP_log_cb_t backup_log_cb = ctx->log_cb; |
31b28ad9 DDO |
470 | int res = 0; |
471 | ||
472 | if (sender == NULL || msg->body == NULL) | |
473 | return 0; /* other NULL cases already have been checked */ | |
474 | if (sender->type != GEN_DIRNAME) { | |
084d3afd | 475 | /* So far, only X509_NAME is supported */ |
9311d0c4 | 476 | ERR_raise(ERR_LIB_CMP, CMP_R_SENDER_GENERALNAME_TYPE_NOT_SUPPORTED); |
31b28ad9 DDO |
477 | return 0; |
478 | } | |
479 | ||
a1e4c8ef DDO |
480 | /* dump any hitherto errors to avoid confusion when printing further ones */ |
481 | OSSL_CMP_CTX_print_errors(ctx); | |
482 | ||
ca6f1ba9 DDO |
483 | /* enable clearing irrelevant errors in attempts to validate sender certs */ |
484 | (void)ERR_set_mark(); | |
080bd08f | 485 | ctx->log_cb = NULL; /* temporarily disable logging */ |
ca6f1ba9 | 486 | |
31b28ad9 DDO |
487 | /* |
488 | * try first cached scrt, used successfully earlier in same transaction, | |
489 | * for validating this and any further msgs where extraCerts may be left out | |
490 | */ | |
a1e4c8ef | 491 | if (scrt != NULL) { |
ca6f1ba9 DDO |
492 | if (check_msg_given_cert(ctx, scrt, msg)) { |
493 | ctx->log_cb = backup_log_cb; | |
a1e4c8ef DDO |
494 | (void)ERR_pop_to_mark(); |
495 | return 1; | |
496 | } | |
a1e4c8ef | 497 | /* cached sender cert has shown to be no more successfully usable */ |
b6fbef11 | 498 | (void)ossl_cmp_ctx_set1_validatedSrvCert(ctx, NULL); |
ca6f1ba9 DDO |
499 | /* re-do the above check (just) for adding diagnostic information */ |
500 | ossl_cmp_info(ctx, | |
501 | "trying to verify msg signature with previously validated cert"); | |
502 | (void)check_msg_given_cert(ctx, scrt, msg); | |
31b28ad9 | 503 | } |
31b28ad9 | 504 | |
a1e4c8ef DDO |
505 | res = check_msg_all_certs(ctx, msg, 0 /* using ctx->trusted */) |
506 | || check_msg_all_certs(ctx, msg, 1 /* 3gpp */); | |
507 | ctx->log_cb = backup_log_cb; | |
508 | if (res) { | |
509 | /* discard any diagnostic information on trying to use certs */ | |
31b28ad9 | 510 | (void)ERR_pop_to_mark(); |
31b28ad9 DDO |
511 | goto end; |
512 | } | |
513 | /* failed finding a sender cert that verifies the message signature */ | |
31b28ad9 DDO |
514 | (void)ERR_clear_last_mark(); |
515 | ||
516 | sname = X509_NAME_oneline(sender->d.directoryName, NULL, 0); | |
a3ea35c2 | 517 | skid_str = skid == NULL ? NULL : i2s_ASN1_OCTET_STRING(NULL, skid); |
31b28ad9 | 518 | if (ctx->log_cb != NULL) { |
a1e4c8ef | 519 | ossl_cmp_info(ctx, "trying to verify msg signature with a valid cert that.."); |
31b28ad9 | 520 | if (sname != NULL) |
a1e4c8ef | 521 | ossl_cmp_log1(INFO, ctx, "matches msg sender = %s", sname); |
31b28ad9 | 522 | if (skid_str != NULL) |
a1e4c8ef | 523 | ossl_cmp_log1(INFO, ctx, "matches msg senderKID = %s", skid_str); |
31b28ad9 DDO |
524 | else |
525 | ossl_cmp_info(ctx, "while msg header does not contain senderKID"); | |
526 | /* re-do the above checks (just) for adding diagnostic information */ | |
ca6f1ba9 DDO |
527 | (void)check_msg_all_certs(ctx, msg, 0 /* using ctx->trusted */); |
528 | (void)check_msg_all_certs(ctx, msg, 1 /* 3gpp */); | |
31b28ad9 DDO |
529 | } |
530 | ||
9311d0c4 | 531 | ERR_raise(ERR_LIB_CMP, CMP_R_NO_SUITABLE_SENDER_CERT); |
31b28ad9 DDO |
532 | if (sname != NULL) { |
533 | ERR_add_error_txt(NULL, "for msg sender name = "); | |
534 | ERR_add_error_txt(NULL, sname); | |
535 | } | |
536 | if (skid_str != NULL) { | |
537 | ERR_add_error_txt(" and ", "for msg senderKID = "); | |
538 | ERR_add_error_txt(NULL, skid_str); | |
539 | } | |
540 | ||
541 | end: | |
542 | OPENSSL_free(sname); | |
543 | OPENSSL_free(skid_str); | |
544 | return res; | |
545 | } | |
546 | ||
c4a9e3eb | 547 | /*- |
31b28ad9 DDO |
548 | * Validate the protection of the given PKIMessage using either password- |
549 | * based mac (PBM) or a signature algorithm. In the case of signature algorithm, | |
550 | * the sender certificate can have been pinned by providing it in ctx->srvCert, | |
0b86eefd | 551 | * else it is searched in msg->extraCerts, ctx->untrusted, in ctx->trusted |
31b28ad9 | 552 | * (in this order) and is path is validated against ctx->trusted. |
b6fbef11 | 553 | * On success cache the found cert using ossl_cmp_ctx_set1_validatedSrvCert(). |
31b28ad9 DDO |
554 | * |
555 | * If ctx->permitTAInExtraCertsForIR is true and when validating a CMP IP msg, | |
556 | * the trust anchor for validating the IP msg may be taken from msg->extraCerts | |
557 | * if a self-issued certificate is found there that can be used to | |
558 | * validate the enrolled certificate returned in the IP. | |
559 | * This is according to the need given in 3GPP TS 33.310. | |
560 | * | |
561 | * Returns 1 on success, 0 on error or validation failed. | |
562 | */ | |
563 | int OSSL_CMP_validate_msg(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg) | |
564 | { | |
31b28ad9 DDO |
565 | X509 *scrt; |
566 | ||
1a5ae1da | 567 | ossl_cmp_debug(ctx, "validating CMP message"); |
31b28ad9 DDO |
568 | if (ctx == NULL || msg == NULL |
569 | || msg->header == NULL || msg->body == NULL) { | |
9311d0c4 | 570 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
31b28ad9 DDO |
571 | return 0; |
572 | } | |
573 | ||
12bbcee2 | 574 | if (msg->header->protectionAlg == NULL /* unprotected message */ |
31b28ad9 | 575 | || msg->protection == NULL || msg->protection->data == NULL) { |
9311d0c4 | 576 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_PROTECTION); |
31b28ad9 DDO |
577 | return 0; |
578 | } | |
579 | ||
12bbcee2 | 580 | switch (ossl_cmp_hdr_get_protection_nid(msg->header)) { |
31b28ad9 DDO |
581 | /* 5.1.3.1. Shared Secret Information */ |
582 | case NID_id_PasswordBasedMAC: | |
b434b2c0 | 583 | if (ctx->secretValue == NULL) { |
fc933357 DDO |
584 | ossl_cmp_info(ctx, "no secret available for verifying PBM-based CMP message protection"); |
585 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_SECRET); | |
586 | return 0; | |
b434b2c0 | 587 | } |
6d1f50b5 DDO |
588 | if (verify_PBMAC(ctx, msg)) { |
589 | /* | |
590 | * RFC 4210, 5.3.2: 'Note that if the PKI Message Protection is | |
591 | * "shared secret information", then any certificate transported in | |
592 | * the caPubs field may be directly trusted as a root CA | |
593 | * certificate by the initiator.' | |
594 | */ | |
7df56ada | 595 | switch (OSSL_CMP_MSG_get_bodytype(msg)) { |
6d1f50b5 DDO |
596 | case -1: |
597 | return 0; | |
598 | case OSSL_CMP_PKIBODY_IP: | |
599 | case OSSL_CMP_PKIBODY_CP: | |
600 | case OSSL_CMP_PKIBODY_KUP: | |
601 | case OSSL_CMP_PKIBODY_CCP: | |
602 | if (ctx->trusted != NULL) { | |
603 | STACK_OF(X509) *certs = msg->body->value.ip->caPubs; | |
604 | /* value.ip is same for cp, kup, and ccp */ | |
605 | ||
606 | if (!ossl_cmp_X509_STORE_add1_certs(ctx->trusted, certs, 0)) | |
607 | /* adds both self-issued and not self-issued certs */ | |
608 | return 0; | |
609 | } | |
610 | break; | |
611 | default: | |
612 | break; | |
613 | } | |
1a5ae1da | 614 | ossl_cmp_debug(ctx, |
e304aa87 | 615 | "successfully validated PBM-based CMP message protection"); |
31b28ad9 | 616 | return 1; |
6d1f50b5 | 617 | } |
1a5ae1da | 618 | ossl_cmp_warn(ctx, "verifying PBM-based CMP message protection failed"); |
31b28ad9 DDO |
619 | break; |
620 | ||
621 | /* | |
622 | * 5.1.3.2 DH Key Pairs | |
623 | * Not yet supported | |
624 | */ | |
625 | case NID_id_DHBasedMac: | |
9311d0c4 | 626 | ERR_raise(ERR_LIB_CMP, CMP_R_UNSUPPORTED_PROTECTION_ALG_DHBASEDMAC); |
31b28ad9 DDO |
627 | break; |
628 | ||
629 | /* | |
630 | * 5.1.3.3. Signature | |
631 | */ | |
632 | default: | |
31b28ad9 DDO |
633 | scrt = ctx->srvCert; |
634 | if (scrt == NULL) { | |
b434b2c0 | 635 | if (ctx->trusted == NULL) { |
fc933357 DDO |
636 | ossl_cmp_info(ctx, "no trust store nor pinned server cert available for verifying signature-based CMP message protection"); |
637 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_TRUST_ANCHOR); | |
638 | return 0; | |
b434b2c0 | 639 | } |
b6fbef11 DDO |
640 | if (check_msg_find_cert(ctx, msg)) { |
641 | ossl_cmp_debug(ctx, | |
c7340583 | 642 | "successfully validated signature-based CMP message protection using trust store"); |
31b28ad9 | 643 | return 1; |
b6fbef11 | 644 | } |
31b28ad9 DDO |
645 | } else { /* use pinned sender cert */ |
646 | /* use ctx->srvCert for signature check even if not acceptable */ | |
1a5ae1da DDO |
647 | if (verify_signature(ctx, msg, scrt)) { |
648 | ossl_cmp_debug(ctx, | |
b6fbef11 DDO |
649 | "successfully validated signature-based CMP message protection using pinned server cert"); |
650 | return ossl_cmp_ctx_set1_validatedSrvCert(ctx, scrt); | |
1a5ae1da DDO |
651 | } |
652 | ossl_cmp_warn(ctx, "CMP message signature verification failed"); | |
9311d0c4 | 653 | ERR_raise(ERR_LIB_CMP, CMP_R_SRVCERT_DOES_NOT_VALIDATE_MSG); |
31b28ad9 DDO |
654 | } |
655 | break; | |
656 | } | |
657 | return 0; | |
658 | } | |
659 | ||
e4699711 DDO |
660 | static int check_transactionID_or_nonce(ASN1_OCTET_STRING *expected, |
661 | ASN1_OCTET_STRING *actual, int reason) | |
662 | { | |
663 | if (expected != NULL | |
664 | && (actual == NULL || ASN1_OCTET_STRING_cmp(expected, actual) != 0)) { | |
665 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION | |
666 | char *expected_str, *actual_str; | |
667 | ||
668 | expected_str = i2s_ASN1_OCTET_STRING(NULL, expected); | |
aeadd298 | 669 | actual_str = actual == NULL ? NULL: i2s_ASN1_OCTET_STRING(NULL, actual); |
ed9c6f36 | 670 | ERR_raise_data(ERR_LIB_CMP, reason, |
e4699711 DDO |
671 | "expected = %s, actual = %s", |
672 | expected_str == NULL ? "?" : expected_str, | |
aeadd298 | 673 | actual == NULL ? "(none)" : |
e4699711 DDO |
674 | actual_str == NULL ? "?" : actual_str); |
675 | OPENSSL_free(expected_str); | |
676 | OPENSSL_free(actual_str); | |
677 | return 0; | |
678 | #endif | |
679 | } | |
680 | return 1; | |
681 | } | |
31b28ad9 DDO |
682 | |
683 | /*- | |
684 | * Check received message (i.e., response by server or request from client) | |
0b86eefd | 685 | * Any msg->extraCerts are prepended to ctx->untrusted. |
31b28ad9 DDO |
686 | * |
687 | * Ensures that: | |
e304aa87 | 688 | * its sender is of appropriate type (currently only X509_NAME) and |
c4a9e3eb | 689 | * matches any expected sender or srvCert subject given in the ctx |
31b28ad9 | 690 | * it has a valid body type |
7e765f46 DDO |
691 | * its protection is valid (or invalid/absent, but only if a callback function |
692 | * is present and yields a positive result using also the supplied argument) | |
31b28ad9 DDO |
693 | * its transaction ID matches the previous transaction ID stored in ctx (if any) |
694 | * its recipNonce matches the previous senderNonce stored in the ctx (if any) | |
695 | * | |
696 | * If everything is fine: | |
697 | * learns the senderNonce from the received message, | |
c4a9e3eb DDO |
698 | * learns the transaction ID if it is not yet in ctx, |
699 | * and makes any certs in caPubs directly trusted. | |
31b28ad9 | 700 | * |
c4a9e3eb | 701 | * Returns 1 on success, 0 on error. |
31b28ad9 | 702 | */ |
430efff1 DDO |
703 | int ossl_cmp_msg_check_update(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg, |
704 | ossl_cmp_allow_unprotected_cb_t cb, int cb_arg) | |
31b28ad9 | 705 | { |
c4a9e3eb DDO |
706 | OSSL_CMP_PKIHEADER *hdr; |
707 | const X509_NAME *expected_sender; | |
1caaf073 | 708 | int num_untrusted, num_added, res; |
c4a9e3eb DDO |
709 | |
710 | if (!ossl_assert(ctx != NULL && msg != NULL && msg->header != NULL)) | |
711 | return 0; | |
712 | hdr = OSSL_CMP_MSG_get0_header(msg); | |
713 | ||
f21409fa | 714 | /* If expected_sender is given, validate sender name of received msg */ |
c4a9e3eb DDO |
715 | expected_sender = ctx->expected_sender; |
716 | if (expected_sender == NULL && ctx->srvCert != NULL) | |
717 | expected_sender = X509_get_subject_name(ctx->srvCert); | |
f21409fa DDO |
718 | if (expected_sender != NULL) { |
719 | const X509_NAME *actual_sender; | |
720 | char *str; | |
721 | ||
722 | if (hdr->sender->type != GEN_DIRNAME) { | |
723 | ERR_raise(ERR_LIB_CMP, CMP_R_SENDER_GENERALNAME_TYPE_NOT_SUPPORTED); | |
724 | return 0; | |
725 | } | |
726 | actual_sender = hdr->sender->d.directoryName; | |
727 | /* | |
728 | * Compare actual sender name of response with expected sender name. | |
729 | * Mitigates risk of accepting misused PBM secret or | |
730 | * misused certificate of an unauthorized entity of a trusted hierarchy. | |
731 | */ | |
732 | if (!check_name(ctx, 0, "sender DN field", actual_sender, | |
733 | "expected sender", expected_sender)) { | |
734 | str = X509_NAME_oneline(actual_sender, NULL, 0); | |
735 | ERR_raise_data(ERR_LIB_CMP, CMP_R_UNEXPECTED_SENDER, | |
736 | str != NULL ? str : "<unknown>"); | |
737 | OPENSSL_free(str); | |
738 | return 0; | |
739 | } | |
740 | } | |
c4a9e3eb | 741 | /* Note: if recipient was NULL-DN it could be learned here if needed */ |
31b28ad9 | 742 | |
1caaf073 DDO |
743 | num_added = sk_X509_num(msg->extraCerts); |
744 | if (num_added > 10) | |
745 | ossl_cmp_log1(WARN, ctx, "received CMP message contains %d extraCerts", | |
746 | num_added); | |
430efff1 DDO |
747 | /* |
748 | * Store any provided extraCerts in ctx for use in OSSL_CMP_validate_msg() | |
749 | * and for future use, such that they are available to ctx->certConf_cb and | |
750 | * the peer does not need to send them again in the same transaction. | |
751 | * Note that it does not help validating the message before storing the | |
752 | * extraCerts because they do not belong to the protected msg part anyway. | |
1caaf073 DDO |
753 | * The extraCerts are prepended. Allows simple removal if they shall not be |
754 | * cached. Also they get used first, which is likely good for efficiency. | |
430efff1 | 755 | */ |
1caaf073 DDO |
756 | num_untrusted = ctx->untrusted == NULL ? 0 : sk_X509_num(ctx->untrusted); |
757 | res = ossl_x509_add_certs_new(&ctx->untrusted, msg->extraCerts, | |
758 | /* this allows self-signed certs */ | |
759 | X509_ADD_FLAG_UP_REF | X509_ADD_FLAG_NO_DUP | |
760 | | X509_ADD_FLAG_PREPEND); | |
761 | num_added = (ctx->untrusted == NULL ? 0 : sk_X509_num(ctx->untrusted)) | |
762 | - num_untrusted; | |
763 | if (!res) { | |
764 | while (num_added-- > 0) | |
765 | X509_free(sk_X509_shift(ctx->untrusted)); | |
430efff1 | 766 | return 0; |
1caaf073 | 767 | } |
31b28ad9 | 768 | |
1caaf073 DDO |
769 | if (hdr->protectionAlg != NULL) |
770 | res = OSSL_CMP_validate_msg(ctx, msg) | |
771 | /* explicitly permitted exceptions for invalid protection: */ | |
772 | || (cb != NULL && (*cb)(ctx, msg, 1, cb_arg) > 0); | |
773 | else | |
774 | /* explicitly permitted exceptions for missing protection: */ | |
775 | res = cb != NULL && (*cb)(ctx, msg, 0, cb_arg) > 0; | |
776 | #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION | |
777 | res = 1; /* support more aggressive fuzzing by letting invalid msg pass */ | |
e599d0ae | 778 | #endif |
1caaf073 DDO |
779 | |
780 | /* remove extraCerts again if not caching */ | |
781 | if (ctx->noCacheExtraCerts) | |
782 | while (num_added-- > 0) | |
783 | X509_free(sk_X509_shift(ctx->untrusted)); | |
784 | ||
785 | if (!res) { | |
786 | if (hdr->protectionAlg != NULL) | |
787 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_VALIDATING_PROTECTION); | |
788 | else | |
9311d0c4 | 789 | ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_PROTECTION); |
1caaf073 | 790 | return 0; |
31b28ad9 DDO |
791 | } |
792 | ||
31b28ad9 | 793 | /* check CMP version number in header */ |
c4ad4e5b DDO |
794 | if (ossl_cmp_hdr_get_pvno(hdr) != OSSL_CMP_PVNO_2 |
795 | && ossl_cmp_hdr_get_pvno(hdr) != OSSL_CMP_PVNO_3) { | |
e599d0ae | 796 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
9311d0c4 | 797 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PVNO); |
430efff1 | 798 | return 0; |
e599d0ae | 799 | #endif |
31b28ad9 DDO |
800 | } |
801 | ||
7df56ada | 802 | if (OSSL_CMP_MSG_get_bodytype(msg) < 0) { |
e599d0ae | 803 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
9311d0c4 | 804 | ERR_raise(ERR_LIB_CMP, CMP_R_PKIBODY_ERROR); |
430efff1 | 805 | return 0; |
e599d0ae | 806 | #endif |
7e765f46 DDO |
807 | } |
808 | ||
31b28ad9 | 809 | /* compare received transactionID with the expected one in previous msg */ |
e4699711 DDO |
810 | if (!check_transactionID_or_nonce(ctx->transactionID, hdr->transactionID, |
811 | CMP_R_TRANSACTIONID_UNMATCHED)) | |
430efff1 | 812 | return 0; |
31b28ad9 | 813 | |
192bfec4 | 814 | /* |
bedffe17 DDO |
815 | * enable clearing irrelevant errors |
816 | * in attempts to validate recipient nonce in case of delayed delivery. | |
192bfec4 RR |
817 | */ |
818 | (void)ERR_set_mark(); | |
31b28ad9 | 819 | /* compare received nonce with the one we sent */ |
e4699711 | 820 | if (!check_transactionID_or_nonce(ctx->senderNonce, hdr->recipNonce, |
192bfec4 RR |
821 | CMP_R_RECIPNONCE_UNMATCHED)) { |
822 | /* check if we are polling and received final response */ | |
823 | if (ctx->first_senderNonce == NULL | |
824 | || OSSL_CMP_MSG_get_bodytype(msg) == OSSL_CMP_PKIBODY_POLLREP | |
825 | /* compare received nonce with our sender nonce at poll start */ | |
826 | || !check_transactionID_or_nonce(ctx->first_senderNonce, | |
827 | hdr->recipNonce, | |
828 | CMP_R_RECIPNONCE_UNMATCHED)) { | |
829 | (void)ERR_clear_last_mark(); | |
830 | return 0; | |
831 | } | |
832 | } | |
192bfec4 | 833 | (void)ERR_pop_to_mark(); |
31b28ad9 | 834 | |
7f7dafe9 DDO |
835 | /* if not yet present, learn transactionID */ |
836 | if (ctx->transactionID == NULL | |
837 | && !OSSL_CMP_CTX_set1_transactionID(ctx, hdr->transactionID)) | |
838 | return 0; | |
839 | ||
31b28ad9 DDO |
840 | /* |
841 | * RFC 4210 section 5.1.1 states: the recipNonce is copied from | |
842 | * the senderNonce of the previous message in the transaction. | |
843 | * --> Store for setting in next message | |
844 | */ | |
c4a9e3eb | 845 | if (!ossl_cmp_ctx_set1_recipNonce(ctx, hdr->senderNonce)) |
430efff1 | 846 | return 0; |
31b28ad9 | 847 | |
c4a9e3eb DDO |
848 | if (ossl_cmp_hdr_get_protection_nid(hdr) == NID_id_PasswordBasedMAC) { |
849 | /* | |
850 | * RFC 4210, 5.3.2: 'Note that if the PKI Message Protection is | |
851 | * "shared secret information", then any certificate transported in | |
852 | * the caPubs field may be directly trusted as a root CA | |
853 | * certificate by the initiator.' | |
854 | */ | |
7df56ada | 855 | switch (OSSL_CMP_MSG_get_bodytype(msg)) { |
c4a9e3eb DDO |
856 | case OSSL_CMP_PKIBODY_IP: |
857 | case OSSL_CMP_PKIBODY_CP: | |
858 | case OSSL_CMP_PKIBODY_KUP: | |
859 | case OSSL_CMP_PKIBODY_CCP: | |
860 | if (ctx->trusted != NULL) { | |
861 | STACK_OF(X509) *certs = msg->body->value.ip->caPubs; | |
862 | /* value.ip is same for cp, kup, and ccp */ | |
863 | ||
864 | if (!ossl_cmp_X509_STORE_add1_certs(ctx->trusted, certs, 0)) | |
865 | /* adds both self-issued and not self-issued certs */ | |
866 | return 0; | |
7b1a3a50 | 867 | } |
c4a9e3eb DDO |
868 | break; |
869 | default: | |
870 | break; | |
871 | } | |
872 | } | |
430efff1 | 873 | return 1; |
31b28ad9 DDO |
874 | } |
875 | ||
6d1f50b5 DDO |
876 | int ossl_cmp_verify_popo(const OSSL_CMP_CTX *ctx, |
877 | const OSSL_CMP_MSG *msg, int acceptRAVerified) | |
31b28ad9 DDO |
878 | { |
879 | if (!ossl_assert(msg != NULL && msg->body != NULL)) | |
880 | return 0; | |
881 | switch (msg->body->type) { | |
882 | case OSSL_CMP_PKIBODY_P10CR: | |
883 | { | |
884 | X509_REQ *req = msg->body->value.p10cr; | |
885 | ||
d8652be0 MC |
886 | if (X509_REQ_verify_ex(req, X509_REQ_get0_pubkey(req), ctx->libctx, |
887 | ctx->propq) <= 0) { | |
e599d0ae | 888 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
9311d0c4 | 889 | ERR_raise(ERR_LIB_CMP, CMP_R_REQUEST_NOT_ACCEPTED); |
e599d0ae DDO |
890 | return 0; |
891 | #endif | |
892 | } | |
31b28ad9 | 893 | } |
e599d0ae | 894 | break; |
31b28ad9 DDO |
895 | case OSSL_CMP_PKIBODY_IR: |
896 | case OSSL_CMP_PKIBODY_CR: | |
897 | case OSSL_CMP_PKIBODY_KUR: | |
e599d0ae | 898 | if (!OSSL_CRMF_MSGS_verify_popo(msg->body->value.ir, OSSL_CMP_CERTREQID, |
6d1f50b5 DDO |
899 | acceptRAVerified, |
900 | ctx->libctx, ctx->propq)) { | |
e599d0ae DDO |
901 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
902 | return 0; | |
903 | #endif | |
904 | } | |
905 | break; | |
31b28ad9 | 906 | default: |
9311d0c4 | 907 | ERR_raise(ERR_LIB_CMP, CMP_R_PKIBODY_ERROR); |
31b28ad9 DDO |
908 | return 0; |
909 | } | |
e599d0ae | 910 | return 1; |
31b28ad9 | 911 | } |