xref: /openssl/crypto/cms/cms_sd.c (revision 7ed6de99)
1 /*
2  * Copyright 2008-2024 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 "internal/cryptlib.h"
11 #include <openssl/asn1t.h>
12 #include <openssl/pem.h>
13 #include <openssl/x509.h>
14 #include <openssl/x509v3.h>
15 #include <openssl/err.h>
16 #include <openssl/cms.h>
17 #include <openssl/ess.h>
18 #include "internal/sizes.h"
19 #include "crypto/asn1.h"
20 #include "crypto/evp.h"
21 #include "crypto/ess.h"
22 #include "crypto/x509.h" /* for ossl_x509_add_cert_new() */
23 #include "cms_local.h"
24 
25 /* CMS SignedData Utilities */
26 
cms_get0_signed(CMS_ContentInfo * cms)27 static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
28 {
29     if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
30         ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
31         return NULL;
32     }
33     return cms->d.signedData;
34 }
35 
cms_signed_data_init(CMS_ContentInfo * cms)36 static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
37 {
38     if (cms->d.other == NULL) {
39         cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
40         if (!cms->d.signedData) {
41             ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
42             return NULL;
43         }
44         cms->d.signedData->version = 1;
45         cms->d.signedData->encapContentInfo->eContentType =
46             OBJ_nid2obj(NID_pkcs7_data);
47         cms->d.signedData->encapContentInfo->partial = 1;
48         ASN1_OBJECT_free(cms->contentType);
49         cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
50         return cms->d.signedData;
51     }
52     return cms_get0_signed(cms);
53 }
54 
55 /* Just initialise SignedData e.g. for certs only structure */
CMS_SignedData_init(CMS_ContentInfo * cms)56 int CMS_SignedData_init(CMS_ContentInfo *cms)
57 {
58     if (cms_signed_data_init(cms))
59         return 1;
60     else
61         return 0;
62 }
63 
64 /* Check structures and fixup version numbers (if necessary) */
cms_sd_set_version(CMS_SignedData * sd)65 static void cms_sd_set_version(CMS_SignedData *sd)
66 {
67     int i;
68     CMS_CertificateChoices *cch;
69     CMS_RevocationInfoChoice *rch;
70     CMS_SignerInfo *si;
71 
72     for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
73         cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
74         if (cch->type == CMS_CERTCHOICE_OTHER) {
75             if (sd->version < 5)
76                 sd->version = 5;
77         } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
78             if (sd->version < 4)
79                 sd->version = 4;
80         } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
81             if (sd->version < 3)
82                 sd->version = 3;
83         }
84     }
85 
86     for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
87         rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
88         if (rch->type == CMS_REVCHOICE_OTHER) {
89             if (sd->version < 5)
90                 sd->version = 5;
91         }
92     }
93 
94     if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
95         && (sd->version < 3))
96         sd->version = 3;
97 
98     for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
99         si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
100         if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
101             if (si->version < 3)
102                 si->version = 3;
103             if (sd->version < 3)
104                 sd->version = 3;
105         } else if (si->version < 1) {
106             si->version = 1;
107         }
108     }
109 
110     if (sd->version < 1)
111         sd->version = 1;
112 
113 }
114 
115 /*
116  * RFC 5652 Section 11.1 Content Type
117  * The content-type attribute within signed-data MUST
118  *   1) be present if there are signed attributes
119  *   2) match the content type in the signed-data,
120  *   3) be a signed attribute.
121  *   4) not have more than one copy of the attribute.
122  *
123  * Note that since the CMS_SignerInfo_sign() always adds the "signing time"
124  * attribute, the content type attribute MUST be added also.
125  * Assumptions: This assumes that the attribute does not already exist.
126  */
cms_set_si_contentType_attr(CMS_ContentInfo * cms,CMS_SignerInfo * si)127 static int cms_set_si_contentType_attr(CMS_ContentInfo *cms, CMS_SignerInfo *si)
128 {
129     ASN1_OBJECT *ctype = cms->d.signedData->encapContentInfo->eContentType;
130 
131     /* Add the contentType attribute */
132     return CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
133                                        V_ASN1_OBJECT, ctype, -1) > 0;
134 }
135 
136 /* Copy an existing messageDigest value */
cms_copy_messageDigest(CMS_ContentInfo * cms,CMS_SignerInfo * si)137 static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
138 {
139     STACK_OF(CMS_SignerInfo) *sinfos;
140     CMS_SignerInfo *sitmp;
141     int i;
142 
143     sinfos = CMS_get0_SignerInfos(cms);
144     for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
145         ASN1_OCTET_STRING *messageDigest;
146 
147         sitmp = sk_CMS_SignerInfo_value(sinfos, i);
148         if (sitmp == si)
149             continue;
150         if (CMS_signed_get_attr_count(sitmp) < 0)
151             continue;
152         if (OBJ_cmp(si->digestAlgorithm->algorithm,
153                     sitmp->digestAlgorithm->algorithm))
154             continue;
155         messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
156                                                     OBJ_nid2obj
157                                                     (NID_pkcs9_messageDigest),
158                                                     -3, V_ASN1_OCTET_STRING);
159         if (!messageDigest) {
160             ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
161             return 0;
162         }
163 
164         if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
165                                         V_ASN1_OCTET_STRING,
166                                         messageDigest, -1))
167             return 1;
168         else
169             return 0;
170     }
171     ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_DIGEST);
172     return 0;
173 }
174 
ossl_cms_set1_SignerIdentifier(CMS_SignerIdentifier * sid,X509 * cert,int type,const CMS_CTX * ctx)175 int ossl_cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert,
176                                    int type, const CMS_CTX *ctx)
177 {
178     switch (type) {
179     case CMS_SIGNERINFO_ISSUER_SERIAL:
180         if (!ossl_cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
181             return 0;
182         break;
183 
184     case CMS_SIGNERINFO_KEYIDENTIFIER:
185         if (!ossl_cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
186             return 0;
187         break;
188 
189     default:
190         ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_ID);
191         return 0;
192     }
193 
194     sid->type = type;
195 
196     return 1;
197 }
198 
ossl_cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier * sid,ASN1_OCTET_STRING ** keyid,X509_NAME ** issuer,ASN1_INTEGER ** sno)199 int ossl_cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
200                                              ASN1_OCTET_STRING **keyid,
201                                              X509_NAME **issuer,
202                                              ASN1_INTEGER **sno)
203 {
204     if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
205         if (issuer)
206             *issuer = sid->d.issuerAndSerialNumber->issuer;
207         if (sno)
208             *sno = sid->d.issuerAndSerialNumber->serialNumber;
209     } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
210         if (keyid)
211             *keyid = sid->d.subjectKeyIdentifier;
212     } else {
213         return 0;
214     }
215     return 1;
216 }
217 
ossl_cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier * sid,X509 * cert)218 int ossl_cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
219 {
220     if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
221         return ossl_cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
222     else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
223         return ossl_cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
224     else
225         return -1;
226 }
227 
228 /* Method to map any, incl. provider-implemented PKEY types to OIDs */
229 /* (EC)DSA and all provider-delivered signatures implementation is the same */
cms_generic_sign(CMS_SignerInfo * si,int verify)230 static int cms_generic_sign(CMS_SignerInfo *si, int verify)
231 {
232     if (!ossl_assert(verify == 0 || verify == 1))
233         return -1;
234 
235     if (!verify) {
236         EVP_PKEY *pkey = si->pkey;
237         int snid, hnid, pknid = EVP_PKEY_get_id(pkey);
238         X509_ALGOR *alg1, *alg2;
239 
240         CMS_SignerInfo_get0_algs(si, NULL, NULL, &alg1, &alg2);
241         if (alg1 == NULL || alg1->algorithm == NULL)
242             return -1;
243         hnid = OBJ_obj2nid(alg1->algorithm);
244         if (hnid == NID_undef)
245             return -1;
246         if (pknid <= 0) { /* check whether a provider registered a NID */
247             const char *typename = EVP_PKEY_get0_type_name(pkey);
248 
249             if (typename != NULL)
250                 pknid = OBJ_txt2nid(typename);
251         }
252         if (!OBJ_find_sigid_by_algs(&snid, hnid, pknid))
253             return -1;
254         return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
255     }
256     return 1;
257 }
258 
cms_sd_asn1_ctrl(CMS_SignerInfo * si,int cmd)259 static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
260 {
261     EVP_PKEY *pkey = si->pkey;
262     int i;
263 
264     if (EVP_PKEY_is_a(pkey, "DSA") || EVP_PKEY_is_a(pkey, "EC"))
265         return cms_generic_sign(si, cmd) > 0;
266     else if (EVP_PKEY_is_a(pkey, "RSA") || EVP_PKEY_is_a(pkey, "RSA-PSS"))
267         return ossl_cms_rsa_sign(si, cmd) > 0;
268 
269     /* Now give engines, providers, etc a chance to handle this */
270     if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
271         return cms_generic_sign(si, cmd) > 0;
272     i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
273     if (i == -2) {
274         ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
275         return 0;
276     }
277     if (i <= 0) {
278         ERR_raise(ERR_LIB_CMS, CMS_R_CTRL_FAILURE);
279         return 0;
280     }
281     return 1;
282 }
283 
284 /* Add SigningCertificate signed attribute to the signer info. */
ossl_cms_add1_signing_cert(CMS_SignerInfo * si,const ESS_SIGNING_CERT * sc)285 static int ossl_cms_add1_signing_cert(CMS_SignerInfo *si,
286                                       const ESS_SIGNING_CERT *sc)
287 {
288     ASN1_STRING *seq = NULL;
289     unsigned char *p, *pp = NULL;
290     int ret, len = i2d_ESS_SIGNING_CERT(sc, NULL);
291 
292     if (len <= 0 || (pp = OPENSSL_malloc(len)) == NULL)
293         return 0;
294 
295     p = pp;
296     i2d_ESS_SIGNING_CERT(sc, &p);
297     if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) {
298         ASN1_STRING_free(seq);
299         OPENSSL_free(pp);
300         return 0;
301     }
302     OPENSSL_free(pp);
303     ret = CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificate,
304                                       V_ASN1_SEQUENCE, seq, -1);
305     ASN1_STRING_free(seq);
306     return ret;
307 }
308 
309 /* Add SigningCertificateV2 signed attribute to the signer info. */
ossl_cms_add1_signing_cert_v2(CMS_SignerInfo * si,const ESS_SIGNING_CERT_V2 * sc)310 static int ossl_cms_add1_signing_cert_v2(CMS_SignerInfo *si,
311                                          const ESS_SIGNING_CERT_V2 *sc)
312 {
313     ASN1_STRING *seq = NULL;
314     unsigned char *p, *pp = NULL;
315     int ret, len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
316 
317     if (len <= 0 || (pp = OPENSSL_malloc(len)) == NULL)
318         return 0;
319 
320     p = pp;
321     i2d_ESS_SIGNING_CERT_V2(sc, &p);
322     if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) {
323         ASN1_STRING_free(seq);
324         OPENSSL_free(pp);
325         return 0;
326     }
327     OPENSSL_free(pp);
328     ret = CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificateV2,
329                                       V_ASN1_SEQUENCE, seq, -1);
330     ASN1_STRING_free(seq);
331     return ret;
332 }
333 
CMS_add1_signer(CMS_ContentInfo * cms,X509 * signer,EVP_PKEY * pk,const EVP_MD * md,unsigned int flags)334 CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
335                                 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
336                                 unsigned int flags)
337 {
338     CMS_SignedData *sd;
339     CMS_SignerInfo *si = NULL;
340     X509_ALGOR *alg;
341     int i, type;
342     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
343 
344     if (!X509_check_private_key(signer, pk)) {
345         ERR_raise(ERR_LIB_CMS, CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
346         return NULL;
347     }
348     sd = cms_signed_data_init(cms);
349     if (!sd)
350         goto err;
351     si = M_ASN1_new_of(CMS_SignerInfo);
352     if (!si) {
353         ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
354         goto err;
355     }
356     /* Call for side-effect of computing hash and caching extensions */
357     X509_check_purpose(signer, -1, -1);
358 
359     X509_up_ref(signer);
360     EVP_PKEY_up_ref(pk);
361 
362     si->cms_ctx = ctx;
363     si->pkey = pk;
364     si->signer = signer;
365     si->mctx = EVP_MD_CTX_new();
366     si->pctx = NULL;
367 
368     if (si->mctx == NULL) {
369         ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
370         goto err;
371     }
372 
373     if (flags & CMS_USE_KEYID) {
374         si->version = 3;
375         if (sd->version < 3)
376             sd->version = 3;
377         type = CMS_SIGNERINFO_KEYIDENTIFIER;
378     } else {
379         type = CMS_SIGNERINFO_ISSUER_SERIAL;
380         si->version = 1;
381     }
382 
383     if (!ossl_cms_set1_SignerIdentifier(si->sid, signer, type, ctx))
384         goto err;
385 
386     if (md == NULL) {
387         int def_nid;
388 
389         if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0) {
390             ERR_raise_data(ERR_LIB_CMS, CMS_R_NO_DEFAULT_DIGEST,
391                            "pkey nid=%d", EVP_PKEY_get_id(pk));
392             goto err;
393         }
394         md = EVP_get_digestbynid(def_nid);
395         if (md == NULL) {
396             ERR_raise_data(ERR_LIB_CMS, CMS_R_NO_DEFAULT_DIGEST,
397                            "default md nid=%d", def_nid);
398             goto err;
399         }
400     }
401 
402     X509_ALGOR_set_md(si->digestAlgorithm, md);
403 
404     /* See if digest is present in digestAlgorithms */
405     for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
406         const ASN1_OBJECT *aoid;
407         char name[OSSL_MAX_NAME_SIZE];
408 
409         alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
410         X509_ALGOR_get0(&aoid, NULL, NULL, alg);
411         OBJ_obj2txt(name, sizeof(name), aoid, 0);
412         if (EVP_MD_is_a(md, name))
413             break;
414     }
415 
416     if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
417         if ((alg = X509_ALGOR_new()) == NULL) {
418             ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
419             goto err;
420         }
421         X509_ALGOR_set_md(alg, md);
422         if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
423             X509_ALGOR_free(alg);
424             ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
425             goto err;
426         }
427     }
428 
429     if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0)) {
430         ERR_raise_data(ERR_LIB_CMS, CMS_R_UNSUPPORTED_SIGNATURE_ALGORITHM,
431                        "pkey nid=%d", EVP_PKEY_get_id(pk));
432         goto err;
433     }
434     if (!(flags & CMS_NOATTR)) {
435         /*
436          * Initialize signed attributes structure so other attributes
437          * such as signing time etc are added later even if we add none here.
438          */
439         if (!si->signedAttrs) {
440             si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
441             if (!si->signedAttrs) {
442                 ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
443                 goto err;
444             }
445         }
446 
447         if (!(flags & CMS_NOSMIMECAP)) {
448             STACK_OF(X509_ALGOR) *smcap = NULL;
449 
450             i = CMS_add_standard_smimecap(&smcap);
451             if (i)
452                 i = CMS_add_smimecap(si, smcap);
453             sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
454             if (!i) {
455                 ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
456                 goto err;
457             }
458         }
459         if (flags & CMS_CADES) {
460             ESS_SIGNING_CERT *sc = NULL;
461             ESS_SIGNING_CERT_V2 *sc2 = NULL;
462             int add_sc;
463 
464             if (md == NULL || EVP_MD_is_a(md, SN_sha1)) {
465                 if ((sc = OSSL_ESS_signing_cert_new_init(signer,
466                                                          NULL, 1)) == NULL)
467                     goto err;
468                 add_sc = ossl_cms_add1_signing_cert(si, sc);
469                 ESS_SIGNING_CERT_free(sc);
470             } else {
471                 if ((sc2 = OSSL_ESS_signing_cert_v2_new_init(md, signer,
472                                                              NULL, 1)) == NULL)
473                     goto err;
474                 add_sc = ossl_cms_add1_signing_cert_v2(si, sc2);
475                 ESS_SIGNING_CERT_V2_free(sc2);
476             }
477             if (!add_sc)
478                 goto err;
479         }
480         if (flags & CMS_REUSE_DIGEST) {
481             if (!cms_copy_messageDigest(cms, si))
482                 goto err;
483             if (!cms_set_si_contentType_attr(cms, si))
484                 goto err;
485             if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) &&
486                 !CMS_SignerInfo_sign(si))
487                 goto err;
488         }
489     }
490 
491     if (!(flags & CMS_NOCERTS)) {
492         /* NB ignore -1 return for duplicate cert */
493         if (!CMS_add1_cert(cms, signer)) {
494             ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
495             goto err;
496         }
497     }
498 
499     if (flags & CMS_KEY_PARAM) {
500         if (flags & CMS_NOATTR) {
501             si->pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx),
502                                                   si->pkey,
503                                                   ossl_cms_ctx_get0_propq(ctx));
504             if (si->pctx == NULL)
505                 goto err;
506             if (EVP_PKEY_sign_init(si->pctx) <= 0)
507                 goto err;
508             if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
509                 goto err;
510         } else if (EVP_DigestSignInit_ex(si->mctx, &si->pctx,
511                                          EVP_MD_get0_name(md),
512                                          ossl_cms_ctx_get0_libctx(ctx),
513                                          ossl_cms_ctx_get0_propq(ctx),
514                                          pk, NULL) <= 0) {
515             si->pctx = NULL;
516             goto err;
517         }
518         else {
519             EVP_MD_CTX_set_flags(si->mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
520         }
521     }
522 
523     if (sd->signerInfos == NULL)
524         sd->signerInfos = sk_CMS_SignerInfo_new_null();
525     if (sd->signerInfos == NULL || !sk_CMS_SignerInfo_push(sd->signerInfos, si)) {
526         ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
527         goto err;
528     }
529 
530     return si;
531 
532  err:
533     M_ASN1_free_of(si, CMS_SignerInfo);
534     return NULL;
535 
536 }
537 
ossl_cms_SignerInfos_set_cmsctx(CMS_ContentInfo * cms)538 void ossl_cms_SignerInfos_set_cmsctx(CMS_ContentInfo *cms)
539 {
540     int i;
541     CMS_SignerInfo *si;
542     STACK_OF(CMS_SignerInfo) *sinfos;
543     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
544 
545     ERR_set_mark();
546     sinfos = CMS_get0_SignerInfos(cms);
547     ERR_pop_to_mark(); /* removes error in case sinfos == NULL */
548 
549     for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
550         si = sk_CMS_SignerInfo_value(sinfos, i);
551         if (si != NULL)
552             si->cms_ctx = ctx;
553     }
554 }
555 
cms_add1_signingTime(CMS_SignerInfo * si,ASN1_TIME * t)556 static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
557 {
558     ASN1_TIME *tt;
559     int r = 0;
560 
561     if (t != NULL)
562         tt = t;
563     else
564         tt = X509_gmtime_adj(NULL, 0);
565 
566     if (tt == NULL) {
567         ERR_raise(ERR_LIB_CMS, ERR_R_X509_LIB);
568         goto err;
569     }
570 
571     if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
572                                     tt->type, tt, -1) <= 0) {
573         ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
574         goto err;
575     }
576 
577     r = 1;
578  err:
579     if (t == NULL)
580         ASN1_TIME_free(tt);
581 
582     return r;
583 
584 }
585 
CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo * si)586 EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
587 {
588     return si->pctx;
589 }
590 
CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo * si)591 EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
592 {
593     return si->mctx;
594 }
595 
STACK_OF(CMS_SignerInfo)596 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
597 {
598     CMS_SignedData *sd = cms_get0_signed(cms);
599 
600     return sd != NULL ? sd->signerInfos : NULL;
601 }
602 
STACK_OF(X509)603 STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
604 {
605     STACK_OF(X509) *signers = NULL;
606     STACK_OF(CMS_SignerInfo) *sinfos;
607     CMS_SignerInfo *si;
608     int i;
609 
610     sinfos = CMS_get0_SignerInfos(cms);
611     for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
612         si = sk_CMS_SignerInfo_value(sinfos, i);
613         if (si->signer != NULL) {
614             if (!ossl_x509_add_cert_new(&signers, si->signer,
615                                         X509_ADD_FLAG_DEFAULT)) {
616                 sk_X509_free(signers);
617                 return NULL;
618             }
619         }
620     }
621     return signers;
622 }
623 
CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo * si,X509 * signer)624 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
625 {
626     if (signer != NULL) {
627         X509_up_ref(signer);
628         EVP_PKEY_free(si->pkey);
629         si->pkey = X509_get_pubkey(signer);
630     }
631     X509_free(si->signer);
632     si->signer = signer;
633 }
634 
CMS_SignerInfo_get0_signer_id(CMS_SignerInfo * si,ASN1_OCTET_STRING ** keyid,X509_NAME ** issuer,ASN1_INTEGER ** sno)635 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
636                                   ASN1_OCTET_STRING **keyid,
637                                   X509_NAME **issuer, ASN1_INTEGER **sno)
638 {
639     return ossl_cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
640 }
641 
CMS_SignerInfo_cert_cmp(CMS_SignerInfo * si,X509 * cert)642 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
643 {
644     return ossl_cms_SignerIdentifier_cert_cmp(si->sid, cert);
645 }
646 
CMS_set1_signers_certs(CMS_ContentInfo * cms,STACK_OF (X509)* scerts,unsigned int flags)647 int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
648                            unsigned int flags)
649 {
650     CMS_SignedData *sd;
651     CMS_SignerInfo *si;
652     CMS_CertificateChoices *cch;
653     STACK_OF(CMS_CertificateChoices) *certs;
654     X509 *x;
655     int i, j;
656     int ret = 0;
657 
658     sd = cms_get0_signed(cms);
659     if (sd == NULL)
660         return -1;
661     certs = sd->certificates;
662     for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
663         si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
664         if (si->signer != NULL)
665             continue;
666 
667         for (j = 0; j < sk_X509_num(scerts); j++) {
668             x = sk_X509_value(scerts, j);
669             if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
670                 CMS_SignerInfo_set1_signer_cert(si, x);
671                 ret++;
672                 break;
673             }
674         }
675 
676         if (si->signer != NULL || (flags & CMS_NOINTERN))
677             continue;
678 
679         for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
680             cch = sk_CMS_CertificateChoices_value(certs, j);
681             if (cch->type != CMS_CERTCHOICE_CERT)
682                 continue;
683             x = cch->d.certificate;
684             if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
685                 CMS_SignerInfo_set1_signer_cert(si, x);
686                 ret++;
687                 break;
688             }
689         }
690     }
691     return ret;
692 }
693 
CMS_SignerInfo_get0_algs(CMS_SignerInfo * si,EVP_PKEY ** pk,X509 ** signer,X509_ALGOR ** pdig,X509_ALGOR ** psig)694 void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
695                               X509 **signer, X509_ALGOR **pdig,
696                               X509_ALGOR **psig)
697 {
698     if (pk != NULL)
699         *pk = si->pkey;
700     if (signer != NULL)
701         *signer = si->signer;
702     if (pdig != NULL)
703         *pdig = si->digestAlgorithm;
704     if (psig != NULL)
705         *psig = si->signatureAlgorithm;
706 }
707 
CMS_SignerInfo_get0_signature(CMS_SignerInfo * si)708 ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si)
709 {
710     return si->signature;
711 }
712 
cms_SignerInfo_content_sign(CMS_ContentInfo * cms,CMS_SignerInfo * si,BIO * chain,const unsigned char * md,unsigned int mdlen)713 static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
714                                        CMS_SignerInfo *si, BIO *chain,
715                                        const unsigned char *md,
716                                        unsigned int mdlen)
717 {
718     EVP_MD_CTX *mctx = EVP_MD_CTX_new();
719     int r = 0;
720     EVP_PKEY_CTX *pctx = NULL;
721     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
722 
723     if (mctx == NULL) {
724         ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
725         return 0;
726     }
727 
728     if (si->pkey == NULL) {
729         ERR_raise(ERR_LIB_CMS, CMS_R_NO_PRIVATE_KEY);
730         goto err;
731     }
732 
733     if (!ossl_cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
734         goto err;
735     /* Set SignerInfo algorithm details if we used custom parameter */
736     if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
737         goto err;
738 
739     /*
740      * If any signed attributes calculate and add messageDigest attribute
741      */
742     if (CMS_signed_get_attr_count(si) >= 0) {
743         unsigned char computed_md[EVP_MAX_MD_SIZE];
744 
745         if (md == NULL) {
746             if (!EVP_DigestFinal_ex(mctx, computed_md, &mdlen))
747                 goto err;
748             md = computed_md;
749         }
750         if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
751                                          V_ASN1_OCTET_STRING, md, mdlen))
752             goto err;
753         /* Copy content type across */
754         if (!cms_set_si_contentType_attr(cms, si))
755             goto err;
756 
757         if (!CMS_SignerInfo_sign(si))
758             goto err;
759     } else if (si->pctx) {
760         unsigned char *sig;
761         size_t siglen;
762         unsigned char computed_md[EVP_MAX_MD_SIZE];
763 
764         pctx = si->pctx;
765         si->pctx = NULL;
766         if (md == NULL) {
767             if (!EVP_DigestFinal_ex(mctx, computed_md, &mdlen))
768                 goto err;
769             md = computed_md;
770         }
771         siglen = EVP_PKEY_get_size(si->pkey);
772         if (siglen == 0 || (sig = OPENSSL_malloc(siglen)) == NULL)
773             goto err;
774         if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) {
775             OPENSSL_free(sig);
776             goto err;
777         }
778         ASN1_STRING_set0(si->signature, sig, siglen);
779     } else {
780         unsigned char *sig;
781         unsigned int siglen;
782 
783         if (md != NULL) {
784             ERR_raise(ERR_LIB_CMS, CMS_R_OPERATION_UNSUPPORTED);
785             goto err;
786         }
787         siglen = EVP_PKEY_get_size(si->pkey);
788         if (siglen == 0 || (sig = OPENSSL_malloc(siglen)) == NULL)
789             goto err;
790         if (!EVP_SignFinal_ex(mctx, sig, &siglen, si->pkey,
791                               ossl_cms_ctx_get0_libctx(ctx),
792                               ossl_cms_ctx_get0_propq(ctx))) {
793             ERR_raise(ERR_LIB_CMS, CMS_R_SIGNFINAL_ERROR);
794             OPENSSL_free(sig);
795             goto err;
796         }
797         ASN1_STRING_set0(si->signature, sig, siglen);
798     }
799 
800     r = 1;
801 
802  err:
803     EVP_MD_CTX_free(mctx);
804     EVP_PKEY_CTX_free(pctx);
805     return r;
806 
807 }
808 
ossl_cms_SignedData_final(CMS_ContentInfo * cms,BIO * chain,const unsigned char * precomp_md,unsigned int precomp_mdlen)809 int ossl_cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain,
810                               const unsigned char *precomp_md,
811                               unsigned int precomp_mdlen)
812 {
813     STACK_OF(CMS_SignerInfo) *sinfos;
814     CMS_SignerInfo *si;
815     int i;
816 
817     sinfos = CMS_get0_SignerInfos(cms);
818     for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
819         si = sk_CMS_SignerInfo_value(sinfos, i);
820         if (!cms_SignerInfo_content_sign(cms, si, chain,
821                                          precomp_md, precomp_mdlen))
822             return 0;
823     }
824     cms->d.signedData->encapContentInfo->partial = 0;
825     return 1;
826 }
827 
CMS_SignerInfo_sign(CMS_SignerInfo * si)828 int CMS_SignerInfo_sign(CMS_SignerInfo *si)
829 {
830     EVP_MD_CTX *mctx = si->mctx;
831     EVP_PKEY_CTX *pctx = NULL;
832     unsigned char *abuf = NULL;
833     int alen;
834     size_t siglen;
835     const CMS_CTX *ctx = si->cms_ctx;
836     char md_name[OSSL_MAX_NAME_SIZE];
837 
838     if (OBJ_obj2txt(md_name, sizeof(md_name),
839                     si->digestAlgorithm->algorithm, 0) <= 0)
840         return 0;
841 
842     if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
843         if (!cms_add1_signingTime(si, NULL))
844             goto err;
845     }
846 
847     if (!ossl_cms_si_check_attributes(si))
848         goto err;
849 
850     if (si->pctx) {
851         pctx = si->pctx;
852     } else {
853         EVP_MD_CTX_reset(mctx);
854         if (EVP_DigestSignInit_ex(mctx, &pctx, md_name,
855                                   ossl_cms_ctx_get0_libctx(ctx),
856                                   ossl_cms_ctx_get0_propq(ctx), si->pkey,
857                                   NULL) <= 0)
858             goto err;
859         EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
860         si->pctx = pctx;
861     }
862 
863     alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
864                          ASN1_ITEM_rptr(CMS_Attributes_Sign));
865     if (alen < 0 || abuf == NULL)
866         goto err;
867     if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
868         goto err;
869     if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
870         goto err;
871     OPENSSL_free(abuf);
872     abuf = OPENSSL_malloc(siglen);
873     if (abuf == NULL)
874         goto err;
875     if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
876         goto err;
877 
878     EVP_MD_CTX_reset(mctx);
879 
880     ASN1_STRING_set0(si->signature, abuf, siglen);
881 
882     return 1;
883 
884  err:
885     OPENSSL_free(abuf);
886     EVP_MD_CTX_reset(mctx);
887     return 0;
888 }
889 
CMS_SignerInfo_verify(CMS_SignerInfo * si)890 int CMS_SignerInfo_verify(CMS_SignerInfo *si)
891 {
892     EVP_MD_CTX *mctx = NULL;
893     unsigned char *abuf = NULL;
894     int alen, r = -1;
895     char name[OSSL_MAX_NAME_SIZE];
896     const EVP_MD *md;
897     EVP_MD *fetched_md = NULL;
898     const CMS_CTX *ctx = si->cms_ctx;
899     OSSL_LIB_CTX *libctx = ossl_cms_ctx_get0_libctx(ctx);
900     const char *propq = ossl_cms_ctx_get0_propq(ctx);
901 
902     if (si->pkey == NULL) {
903         ERR_raise(ERR_LIB_CMS, CMS_R_NO_PUBLIC_KEY);
904         return -1;
905     }
906 
907     if (!ossl_cms_si_check_attributes(si))
908         return -1;
909 
910     OBJ_obj2txt(name, sizeof(name), si->digestAlgorithm->algorithm, 0);
911 
912     (void)ERR_set_mark();
913     fetched_md = EVP_MD_fetch(libctx, name, propq);
914 
915     if (fetched_md != NULL)
916         md = fetched_md;
917     else
918         md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
919     if (md == NULL) {
920         (void)ERR_clear_last_mark();
921         ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_DIGEST_ALGORITHM);
922         return -1;
923     }
924     (void)ERR_pop_to_mark();
925 
926     if (si->mctx == NULL && (si->mctx = EVP_MD_CTX_new()) == NULL) {
927         ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
928         goto err;
929     }
930     mctx = si->mctx;
931     if (si->pctx != NULL) {
932         EVP_PKEY_CTX_free(si->pctx);
933         si->pctx = NULL;
934     }
935     if (EVP_DigestVerifyInit_ex(mctx, &si->pctx, EVP_MD_get0_name(md), libctx,
936                                 propq, si->pkey, NULL) <= 0) {
937         si->pctx = NULL;
938         goto err;
939     }
940     EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
941 
942     if (!cms_sd_asn1_ctrl(si, 1))
943         goto err;
944 
945     alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
946                          ASN1_ITEM_rptr(CMS_Attributes_Verify));
947     if (abuf == NULL || alen < 0)
948         goto err;
949     r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
950     OPENSSL_free(abuf);
951     if (r <= 0) {
952         r = -1;
953         goto err;
954     }
955     r = EVP_DigestVerifyFinal(mctx,
956                               si->signature->data, si->signature->length);
957     if (r <= 0)
958         ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
959  err:
960     EVP_MD_free(fetched_md);
961     EVP_MD_CTX_reset(mctx);
962     return r;
963 }
964 
965 /* Create a chain of digest BIOs from a CMS ContentInfo */
ossl_cms_SignedData_init_bio(CMS_ContentInfo * cms)966 BIO *ossl_cms_SignedData_init_bio(CMS_ContentInfo *cms)
967 {
968     int i;
969     CMS_SignedData *sd;
970     BIO *chain = NULL;
971 
972     sd = cms_get0_signed(cms);
973     if (sd == NULL)
974         return NULL;
975     if (cms->d.signedData->encapContentInfo->partial)
976         cms_sd_set_version(sd);
977     for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
978         X509_ALGOR *digestAlgorithm;
979         BIO *mdbio;
980 
981         digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
982         mdbio = ossl_cms_DigestAlgorithm_init_bio(digestAlgorithm,
983                                                   ossl_cms_get0_cmsctx(cms));
984         if (mdbio == NULL)
985             goto err;
986         if (chain != NULL)
987             BIO_push(chain, mdbio);
988         else
989             chain = mdbio;
990     }
991     return chain;
992  err:
993     BIO_free_all(chain);
994     return NULL;
995 }
996 
CMS_SignerInfo_verify_content(CMS_SignerInfo * si,BIO * chain)997 int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
998 {
999     ASN1_OCTET_STRING *os = NULL;
1000     EVP_MD_CTX *mctx = EVP_MD_CTX_new();
1001     EVP_PKEY_CTX *pkctx = NULL;
1002     int r = -1;
1003     unsigned char mval[EVP_MAX_MD_SIZE];
1004     unsigned int mlen;
1005 
1006     if (mctx == NULL) {
1007         ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
1008         goto err;
1009     }
1010     /* If we have any signed attributes look for messageDigest value */
1011     if (CMS_signed_get_attr_count(si) >= 0) {
1012         os = CMS_signed_get0_data_by_OBJ(si,
1013                                          OBJ_nid2obj(NID_pkcs9_messageDigest),
1014                                          -3, V_ASN1_OCTET_STRING);
1015         if (os == NULL) {
1016             ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
1017             goto err;
1018         }
1019     }
1020 
1021     if (!ossl_cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
1022         goto err;
1023 
1024     if (EVP_DigestFinal_ex(mctx, mval, &mlen) <= 0) {
1025         ERR_raise(ERR_LIB_CMS, CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
1026         goto err;
1027     }
1028 
1029     /* If messageDigest found compare it */
1030     if (os != NULL) {
1031         if (mlen != (unsigned int)os->length) {
1032             ERR_raise(ERR_LIB_CMS, CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
1033             goto err;
1034         }
1035 
1036         if (memcmp(mval, os->data, mlen)) {
1037             ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
1038             r = 0;
1039         } else {
1040             r = 1;
1041         }
1042     } else {
1043         const EVP_MD *md = EVP_MD_CTX_get0_md(mctx);
1044         const CMS_CTX *ctx = si->cms_ctx;
1045 
1046         pkctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx),
1047                                            si->pkey,
1048                                            ossl_cms_ctx_get0_propq(ctx));
1049         if (pkctx == NULL)
1050             goto err;
1051         if (EVP_PKEY_verify_init(pkctx) <= 0)
1052             goto err;
1053         if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
1054             goto err;
1055         si->pctx = pkctx;
1056         if (!cms_sd_asn1_ctrl(si, 1)) {
1057             si->pctx = NULL;
1058             goto err;
1059         }
1060         si->pctx = NULL;
1061         r = EVP_PKEY_verify(pkctx, si->signature->data,
1062                             si->signature->length, mval, mlen);
1063         if (r <= 0) {
1064             ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
1065             r = 0;
1066         }
1067     }
1068 
1069  err:
1070     EVP_PKEY_CTX_free(pkctx);
1071     EVP_MD_CTX_free(mctx);
1072     return r;
1073 
1074 }
1075 
CMS_SignedData_verify(CMS_SignedData * sd,BIO * detached_data,STACK_OF (X509)* scerts,X509_STORE * store,STACK_OF (X509)* extra,STACK_OF (X509_CRL)* crls,unsigned int flags,OSSL_LIB_CTX * libctx,const char * propq)1076 BIO *CMS_SignedData_verify(CMS_SignedData *sd, BIO *detached_data,
1077                            STACK_OF(X509) *scerts, X509_STORE *store,
1078                            STACK_OF(X509) *extra, STACK_OF(X509_CRL) *crls,
1079                            unsigned int flags,
1080                            OSSL_LIB_CTX *libctx, const char *propq)
1081 {
1082     CMS_ContentInfo *ci;
1083     BIO *bio = NULL;
1084     int i, res = 0;
1085 
1086     if (sd == NULL) {
1087         ERR_raise(ERR_LIB_CMS, ERR_R_PASSED_NULL_PARAMETER);
1088         return NULL;
1089     }
1090 
1091     if ((ci = CMS_ContentInfo_new_ex(libctx, propq)) == NULL)
1092         return NULL;
1093     if ((bio = BIO_new(BIO_s_mem())) == NULL)
1094         goto end;
1095     ci->contentType = OBJ_nid2obj(NID_pkcs7_signed);
1096     ci->d.signedData = sd;
1097 
1098     for (i = 0; i < sk_X509_num(extra); i++)
1099         if (!CMS_add1_cert(ci, sk_X509_value(extra, i)))
1100             goto end;
1101     for (i = 0; i < sk_X509_CRL_num(crls); i++)
1102         if (!CMS_add1_crl(ci, sk_X509_CRL_value(crls, i)))
1103             goto end;
1104     res = CMS_verify(ci, scerts, store, detached_data, bio, flags);
1105 
1106  end:
1107     if (ci != NULL)
1108         ci->d.signedData = NULL; /* do not indirectly free |sd| */
1109     CMS_ContentInfo_free(ci);
1110     if (!res) {
1111         BIO_free(bio);
1112         bio = NULL;
1113     }
1114     return bio;
1115 }
1116 
CMS_add_smimecap(CMS_SignerInfo * si,STACK_OF (X509_ALGOR)* algs)1117 int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
1118 {
1119     unsigned char *smder = NULL;
1120     int smderlen, r;
1121 
1122     smderlen = i2d_X509_ALGORS(algs, &smder);
1123     if (smderlen <= 0)
1124         return 0;
1125     r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
1126                                     V_ASN1_SEQUENCE, smder, smderlen);
1127     OPENSSL_free(smder);
1128     return r;
1129 }
1130 
CMS_add_simple_smimecap(STACK_OF (X509_ALGOR)** algs,int algnid,int keysize)1131 int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
1132                             int algnid, int keysize)
1133 {
1134     X509_ALGOR *alg;
1135     ASN1_INTEGER *key = NULL;
1136 
1137     if (keysize > 0) {
1138         key = ASN1_INTEGER_new();
1139         if (key == NULL || !ASN1_INTEGER_set(key, keysize)) {
1140             ASN1_INTEGER_free(key);
1141             return 0;
1142         }
1143     }
1144     alg = ossl_X509_ALGOR_from_nid(algnid, key != NULL ? V_ASN1_INTEGER :
1145                                    V_ASN1_UNDEF, key);
1146     if (alg == NULL) {
1147         ASN1_INTEGER_free(key);
1148         return 0;
1149     }
1150 
1151     if (*algs == NULL)
1152         *algs = sk_X509_ALGOR_new_null();
1153     if (*algs == NULL || !sk_X509_ALGOR_push(*algs, alg)) {
1154         X509_ALGOR_free(alg);
1155         return 0;
1156     }
1157     return 1;
1158 }
1159 
1160 /* Check to see if a cipher exists and if so add S/MIME capabilities */
cms_add_cipher_smcap(STACK_OF (X509_ALGOR)** sk,int nid,int arg)1161 static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1162 {
1163     if (EVP_get_cipherbynid(nid))
1164         return CMS_add_simple_smimecap(sk, nid, arg);
1165     return 1;
1166 }
1167 
cms_add_digest_smcap(STACK_OF (X509_ALGOR)** sk,int nid,int arg)1168 static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1169 {
1170     if (EVP_get_digestbynid(nid))
1171         return CMS_add_simple_smimecap(sk, nid, arg);
1172     return 1;
1173 }
1174 
CMS_add_standard_smimecap(STACK_OF (X509_ALGOR)** smcap)1175 int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
1176 {
1177     if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
1178         || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
1179         || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
1180         || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
1181         || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
1182         || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
1183         || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
1184         || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
1185         || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
1186         || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
1187         || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
1188         || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
1189         return 0;
1190     return 1;
1191 }
1192