2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include <openssl/x509v3.h>
12 #include <openssl/err.h>
13 #include <openssl/ess.h>
14 #include "crypto/ess.h"
16 DEFINE_STACK_OF(ESS_CERT_ID)
17 DEFINE_STACK_OF(ESS_CERT_ID_V2)
18 DEFINE_STACK_OF(GENERAL_NAME)
21 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed);
22 static ESS_CERT_ID_V2 *ESS_CERT_ID_V2_new_init(const EVP_MD *hash_alg,
23 X509 *cert, int issuer_needed);
25 ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
26 STACK_OF(X509) *certs,
29 ESS_CERT_ID *cid = NULL;
33 if ((sc = ESS_SIGNING_CERT_new()) == NULL)
35 if (sc->cert_ids == NULL
36 && (sc->cert_ids = sk_ESS_CERT_ID_new_null()) == NULL)
39 if ((cid = ESS_CERT_ID_new_init(signcert, issuer_needed)) == NULL
40 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
42 for (i = 0; i < sk_X509_num(certs); ++i) {
43 X509 *cert = sk_X509_value(certs, i);
44 if ((cid = ESS_CERT_ID_new_init(cert, 1)) == NULL
45 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
51 ESS_SIGNING_CERT_free(sc);
52 ESS_CERT_ID_free(cid);
53 ESSerr(ESS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
57 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
59 ESS_CERT_ID *cid = NULL;
60 GENERAL_NAME *name = NULL;
61 unsigned char cert_sha1[SHA_DIGEST_LENGTH];
63 /* Call for side-effect of computing hash and caching extensions */
64 if (!X509v3_cache_extensions(cert, NULL, NULL))
67 if ((cid = ESS_CERT_ID_new()) == NULL)
69 /* TODO(3.0): fetch sha1 algorithm from providers */
70 if (!X509_digest(cert, EVP_sha1(), cert_sha1, NULL))
72 if (!ASN1_OCTET_STRING_set(cid->hash, cert_sha1, SHA_DIGEST_LENGTH))
75 /* Setting the issuer/serial if requested. */
79 if (cid->issuer_serial == NULL
80 && (cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
82 if ((name = GENERAL_NAME_new()) == NULL)
84 name->type = GEN_DIRNAME;
85 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
87 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
89 name = NULL; /* Ownership is lost. */
90 ASN1_INTEGER_free(cid->issuer_serial->serial);
91 if ((cid->issuer_serial->serial =
92 ASN1_INTEGER_dup(X509_get_serialNumber(cert))) == NULL)
97 GENERAL_NAME_free(name);
98 ESS_CERT_ID_free(cid);
99 ESSerr(ESS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
103 ESS_SIGNING_CERT_V2 *ESS_SIGNING_CERT_V2_new_init(const EVP_MD *hash_alg,
105 STACK_OF(X509) *certs,
108 ESS_CERT_ID_V2 *cid = NULL;
109 ESS_SIGNING_CERT_V2 *sc;
112 if ((sc = ESS_SIGNING_CERT_V2_new()) == NULL)
114 if ((cid = ESS_CERT_ID_V2_new_init(hash_alg, signcert, issuer_needed)) == NULL)
116 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
120 for (i = 0; i < sk_X509_num(certs); ++i) {
121 X509 *cert = sk_X509_value(certs, i);
123 if ((cid = ESS_CERT_ID_V2_new_init(hash_alg, cert, 1)) == NULL)
125 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
132 ESS_SIGNING_CERT_V2_free(sc);
133 ESS_CERT_ID_V2_free(cid);
134 ESSerr(ESS_F_ESS_SIGNING_CERT_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
138 static ESS_CERT_ID_V2 *ESS_CERT_ID_V2_new_init(const EVP_MD *hash_alg,
139 X509 *cert, int issuer_needed)
142 GENERAL_NAME *name = NULL;
143 unsigned char hash[EVP_MAX_MD_SIZE];
144 unsigned int hash_len = sizeof(hash);
145 X509_ALGOR *alg = NULL;
147 memset(hash, 0, sizeof(hash));
149 if ((cid = ESS_CERT_ID_V2_new()) == NULL)
152 if (hash_alg != EVP_sha256()) {
153 alg = X509_ALGOR_new();
156 X509_ALGOR_set_md(alg, hash_alg);
157 if (alg->algorithm == NULL)
162 cid->hash_alg = NULL;
165 /* TODO(3.0): fetch sha1 algorithm from providers */
166 if (!X509_digest(cert, hash_alg, hash, &hash_len))
169 if (!ASN1_OCTET_STRING_set(cid->hash, hash, hash_len))
175 if ((cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
177 if ((name = GENERAL_NAME_new()) == NULL)
179 name->type = GEN_DIRNAME;
180 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
182 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
184 name = NULL; /* Ownership is lost. */
185 ASN1_INTEGER_free(cid->issuer_serial->serial);
186 cid->issuer_serial->serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
187 if (cid->issuer_serial->serial == NULL)
192 X509_ALGOR_free(alg);
193 GENERAL_NAME_free(name);
194 ESS_CERT_ID_V2_free(cid);
195 ESSerr(ESS_F_ESS_CERT_ID_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
199 ESS_SIGNING_CERT *ESS_SIGNING_CERT_get(PKCS7_SIGNER_INFO *si)
202 const unsigned char *p;
204 attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificate);
207 p = attr->value.sequence->data;
208 return d2i_ESS_SIGNING_CERT(NULL, &p, attr->value.sequence->length);
211 ESS_SIGNING_CERT_V2 *ESS_SIGNING_CERT_V2_get(PKCS7_SIGNER_INFO *si)
214 const unsigned char *p;
216 attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificateV2);
219 p = attr->value.sequence->data;
220 return d2i_ESS_SIGNING_CERT_V2(NULL, &p, attr->value.sequence->length);
223 int ESS_SIGNING_CERT_add(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
225 ASN1_STRING *seq = NULL;
226 unsigned char *p, *pp = NULL;
229 len = i2d_ESS_SIGNING_CERT(sc, NULL);
230 if ((pp = OPENSSL_malloc(len)) == NULL) {
231 ESSerr(ESS_F_ESS_SIGNING_CERT_ADD, ERR_R_MALLOC_FAILURE);
235 i2d_ESS_SIGNING_CERT(sc, &p);
236 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
237 ESSerr(ESS_F_ESS_SIGNING_CERT_ADD, ERR_R_MALLOC_FAILURE);
242 return PKCS7_add_signed_attribute(si,
243 NID_id_smime_aa_signingCertificate,
244 V_ASN1_SEQUENCE, seq);
246 ASN1_STRING_free(seq);
252 int ESS_SIGNING_CERT_V2_add(PKCS7_SIGNER_INFO *si,
253 ESS_SIGNING_CERT_V2 *sc)
255 ASN1_STRING *seq = NULL;
256 unsigned char *p, *pp = NULL;
257 int len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
259 if ((pp = OPENSSL_malloc(len)) == NULL) {
260 ESSerr(ESS_F_ESS_SIGNING_CERT_V2_ADD, ERR_R_MALLOC_FAILURE);
265 i2d_ESS_SIGNING_CERT_V2(sc, &p);
266 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
267 ESSerr(ESS_F_ESS_SIGNING_CERT_V2_ADD, ERR_R_MALLOC_FAILURE);
273 return PKCS7_add_signed_attribute(si,
274 NID_id_smime_aa_signingCertificateV2,
275 V_ASN1_SEQUENCE, seq);
277 ASN1_STRING_free(seq);
282 static int ess_issuer_serial_cmp(const ESS_ISSUER_SERIAL *is, const X509 *cert)
284 GENERAL_NAME *issuer;
286 if (is == NULL || cert == NULL || sk_GENERAL_NAME_num(is->issuer) != 1)
289 issuer = sk_GENERAL_NAME_value(is->issuer, 0);
290 if (issuer->type != GEN_DIRNAME
291 || X509_NAME_cmp(issuer->d.dirn, X509_get_issuer_name(cert)) != 0)
294 return ASN1_INTEGER_cmp(is->serial, X509_get0_serialNumber(cert));
297 /* Returns < 0 if certificate is not found, certificate index otherwise. */
298 int ess_find_cert(const STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert)
301 unsigned char cert_sha1[SHA_DIGEST_LENGTH];
303 if (cert_ids == NULL || cert == NULL)
306 /* Recompute SHA1 hash of certificate if necessary (side effect). */
307 if (!X509v3_cache_extensions(cert, NULL, NULL))
310 /* TODO(3.0): fetch sha1 algorithm from providers */
311 if (!X509_digest(cert, EVP_sha1(), cert_sha1, NULL))
314 /* Look for cert in the cert_ids vector. */
315 for (i = 0; i < sk_ESS_CERT_ID_num(cert_ids); ++i) {
316 const ESS_CERT_ID *cid = sk_ESS_CERT_ID_value(cert_ids, i);
318 if (cid->hash->length == SHA_DIGEST_LENGTH
319 && memcmp(cid->hash->data, cert_sha1, SHA_DIGEST_LENGTH) == 0) {
320 const ESS_ISSUER_SERIAL *is = cid->issuer_serial;
322 if (is == NULL || ess_issuer_serial_cmp(is, cert) == 0)
330 /* Returns < 0 if certificate is not found, certificate index otherwise. */
331 int ess_find_cert_v2(const STACK_OF(ESS_CERT_ID_V2) *cert_ids, const X509 *cert)
334 unsigned char cert_digest[EVP_MAX_MD_SIZE];
337 /* Look for cert in the cert_ids vector. */
338 for (i = 0; i < sk_ESS_CERT_ID_V2_num(cert_ids); ++i) {
339 const ESS_CERT_ID_V2 *cid = sk_ESS_CERT_ID_V2_value(cert_ids, i);
342 if (cid != NULL && cid->hash_alg != NULL)
343 md = EVP_get_digestbyobj(cid->hash_alg->algorithm);
347 /* TODO(3.0): fetch sha1 algorithm from providers */
348 if (!X509_digest(cert, md, cert_digest, &len))
351 if (cid->hash->length != (int)len)
354 if (memcmp(cid->hash->data, cert_digest, cid->hash->length) == 0) {
355 const ESS_ISSUER_SERIAL *is = cid->issuer_serial;
357 if (is == NULL || ess_issuer_serial_cmp(is, cert) == 0)