| /* |
| * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include "internal/cryptlib.h" |
| #include <openssl/asn1t.h> |
| #include <openssl/pem.h> |
| #include <openssl/x509.h> |
| #include <openssl/x509v3.h> |
| #include <openssl/err.h> |
| #include <openssl/cms.h> |
| #include "cms_lcl.h" |
| #include "internal/asn1_int.h" |
| #include "internal/evp_int.h" |
| |
| /* CMS SignedData Utilities */ |
| |
| static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms) |
| { |
| if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) { |
| CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA); |
| return NULL; |
| } |
| return cms->d.signedData; |
| } |
| |
| static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms) |
| { |
| if (cms->d.other == NULL) { |
| cms->d.signedData = M_ASN1_new_of(CMS_SignedData); |
| if (!cms->d.signedData) { |
| CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| cms->d.signedData->version = 1; |
| cms->d.signedData->encapContentInfo->eContentType = |
| OBJ_nid2obj(NID_pkcs7_data); |
| cms->d.signedData->encapContentInfo->partial = 1; |
| ASN1_OBJECT_free(cms->contentType); |
| cms->contentType = OBJ_nid2obj(NID_pkcs7_signed); |
| return cms->d.signedData; |
| } |
| return cms_get0_signed(cms); |
| } |
| |
| /* Just initialise SignedData e.g. for certs only structure */ |
| |
| int CMS_SignedData_init(CMS_ContentInfo *cms) |
| { |
| if (cms_signed_data_init(cms)) |
| return 1; |
| else |
| return 0; |
| } |
| |
| /* Check structures and fixup version numbers (if necessary) */ |
| |
| static void cms_sd_set_version(CMS_SignedData *sd) |
| { |
| int i; |
| CMS_CertificateChoices *cch; |
| CMS_RevocationInfoChoice *rch; |
| CMS_SignerInfo *si; |
| |
| for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) { |
| cch = sk_CMS_CertificateChoices_value(sd->certificates, i); |
| if (cch->type == CMS_CERTCHOICE_OTHER) { |
| if (sd->version < 5) |
| sd->version = 5; |
| } else if (cch->type == CMS_CERTCHOICE_V2ACERT) { |
| if (sd->version < 4) |
| sd->version = 4; |
| } else if (cch->type == CMS_CERTCHOICE_V1ACERT) { |
| if (sd->version < 3) |
| sd->version = 3; |
| } |
| } |
| |
| for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) { |
| rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i); |
| if (rch->type == CMS_REVCHOICE_OTHER) { |
| if (sd->version < 5) |
| sd->version = 5; |
| } |
| } |
| |
| if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data) |
| && (sd->version < 3)) |
| sd->version = 3; |
| |
| for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) { |
| si = sk_CMS_SignerInfo_value(sd->signerInfos, i); |
| if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) { |
| if (si->version < 3) |
| si->version = 3; |
| if (sd->version < 3) |
| sd->version = 3; |
| } else if (si->version < 1) |
| si->version = 1; |
| } |
| |
| if (sd->version < 1) |
| sd->version = 1; |
| |
| } |
| |
| /* Copy an existing messageDigest value */ |
| |
| static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si) |
| { |
| STACK_OF(CMS_SignerInfo) *sinfos; |
| CMS_SignerInfo *sitmp; |
| int i; |
| sinfos = CMS_get0_SignerInfos(cms); |
| for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) { |
| ASN1_OCTET_STRING *messageDigest; |
| sitmp = sk_CMS_SignerInfo_value(sinfos, i); |
| if (sitmp == si) |
| continue; |
| if (CMS_signed_get_attr_count(sitmp) < 0) |
| continue; |
| if (OBJ_cmp(si->digestAlgorithm->algorithm, |
| sitmp->digestAlgorithm->algorithm)) |
| continue; |
| messageDigest = CMS_signed_get0_data_by_OBJ(sitmp, |
| OBJ_nid2obj |
| (NID_pkcs9_messageDigest), |
| -3, V_ASN1_OCTET_STRING); |
| if (!messageDigest) { |
| CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, |
| CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE); |
| return 0; |
| } |
| |
| if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest, |
| V_ASN1_OCTET_STRING, |
| messageDigest, -1)) |
| return 1; |
| else |
| return 0; |
| } |
| CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST); |
| return 0; |
| } |
| |
| int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type) |
| { |
| switch (type) { |
| case CMS_SIGNERINFO_ISSUER_SERIAL: |
| if (!cms_set1_ias(&sid->d.issuerAndSerialNumber, cert)) |
| return 0; |
| break; |
| |
| case CMS_SIGNERINFO_KEYIDENTIFIER: |
| if (!cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert)) |
| return 0; |
| break; |
| |
| default: |
| CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID); |
| return 0; |
| } |
| |
| sid->type = type; |
| |
| return 1; |
| } |
| |
| int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid, |
| ASN1_OCTET_STRING **keyid, |
| X509_NAME **issuer, |
| ASN1_INTEGER **sno) |
| { |
| if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) { |
| if (issuer) |
| *issuer = sid->d.issuerAndSerialNumber->issuer; |
| if (sno) |
| *sno = sid->d.issuerAndSerialNumber->serialNumber; |
| } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) { |
| if (keyid) |
| *keyid = sid->d.subjectKeyIdentifier; |
| } else |
| return 0; |
| return 1; |
| } |
| |
| int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert) |
| { |
| if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) |
| return cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert); |
| else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) |
| return cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert); |
| else |
| return -1; |
| } |
| |
| static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd) |
| { |
| EVP_PKEY *pkey = si->pkey; |
| int i; |
| if (!pkey->ameth || !pkey->ameth->pkey_ctrl) |
| return 1; |
| i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si); |
| if (i == -2) { |
| CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); |
| return 0; |
| } |
| if (i <= 0) { |
| CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE); |
| return 0; |
| } |
| return 1; |
| } |
| |
| CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms, |
| X509 *signer, EVP_PKEY *pk, const EVP_MD *md, |
| unsigned int flags) |
| { |
| CMS_SignedData *sd; |
| CMS_SignerInfo *si = NULL; |
| X509_ALGOR *alg; |
| int i, type; |
| if (!X509_check_private_key(signer, pk)) { |
| CMSerr(CMS_F_CMS_ADD1_SIGNER, |
| CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); |
| return NULL; |
| } |
| sd = cms_signed_data_init(cms); |
| if (!sd) |
| goto err; |
| si = M_ASN1_new_of(CMS_SignerInfo); |
| if (!si) |
| goto merr; |
| /* Call for side-effect of computing hash and caching extensions */ |
| X509_check_purpose(signer, -1, -1); |
| |
| X509_up_ref(signer); |
| EVP_PKEY_up_ref(pk); |
| |
| si->pkey = pk; |
| si->signer = signer; |
| si->mctx = EVP_MD_CTX_new(); |
| si->pctx = NULL; |
| |
| if (si->mctx == NULL) { |
| CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (flags & CMS_USE_KEYID) { |
| si->version = 3; |
| if (sd->version < 3) |
| sd->version = 3; |
| type = CMS_SIGNERINFO_KEYIDENTIFIER; |
| } else { |
| type = CMS_SIGNERINFO_ISSUER_SERIAL; |
| si->version = 1; |
| } |
| |
| if (!cms_set1_SignerIdentifier(si->sid, signer, type)) |
| goto err; |
| |
| if (md == NULL) { |
| int def_nid; |
| if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0) |
| goto err; |
| md = EVP_get_digestbynid(def_nid); |
| if (md == NULL) { |
| CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST); |
| goto err; |
| } |
| } |
| |
| if (!md) { |
| CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET); |
| goto err; |
| } |
| |
| X509_ALGOR_set_md(si->digestAlgorithm, md); |
| |
| /* See if digest is present in digestAlgorithms */ |
| for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) { |
| const ASN1_OBJECT *aoid; |
| alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i); |
| X509_ALGOR_get0(&aoid, NULL, NULL, alg); |
| if (OBJ_obj2nid(aoid) == EVP_MD_type(md)) |
| break; |
| } |
| |
| if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) { |
| alg = X509_ALGOR_new(); |
| if (alg == NULL) |
| goto merr; |
| X509_ALGOR_set_md(alg, md); |
| if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) { |
| X509_ALGOR_free(alg); |
| goto merr; |
| } |
| } |
| |
| if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0)) |
| goto err; |
| if (!(flags & CMS_NOATTR)) { |
| /* |
| * Initialize signed attributes structure so other attributes |
| * such as signing time etc are added later even if we add none here. |
| */ |
| if (!si->signedAttrs) { |
| si->signedAttrs = sk_X509_ATTRIBUTE_new_null(); |
| if (!si->signedAttrs) |
| goto merr; |
| } |
| |
| if (!(flags & CMS_NOSMIMECAP)) { |
| STACK_OF(X509_ALGOR) *smcap = NULL; |
| i = CMS_add_standard_smimecap(&smcap); |
| if (i) |
| i = CMS_add_smimecap(si, smcap); |
| sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); |
| if (!i) |
| goto merr; |
| } |
| if (flags & CMS_REUSE_DIGEST) { |
| if (!cms_copy_messageDigest(cms, si)) |
| goto err; |
| if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) && |
| !CMS_SignerInfo_sign(si)) |
| goto err; |
| } |
| } |
| |
| if (!(flags & CMS_NOCERTS)) { |
| /* NB ignore -1 return for duplicate cert */ |
| if (!CMS_add1_cert(cms, signer)) |
| goto merr; |
| } |
| |
| if (flags & CMS_KEY_PARAM) { |
| if (flags & CMS_NOATTR) { |
| si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL); |
| if (si->pctx == NULL) |
| goto err; |
| if (EVP_PKEY_sign_init(si->pctx) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0) |
| goto err; |
| } else if (EVP_DigestSignInit(si->mctx, &si->pctx, md, NULL, pk) <= |
| 0) |
| goto err; |
| } |
| |
| if (!sd->signerInfos) |
| sd->signerInfos = sk_CMS_SignerInfo_new_null(); |
| if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si)) |
| goto merr; |
| |
| return si; |
| |
| merr: |
| CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE); |
| err: |
| M_ASN1_free_of(si, CMS_SignerInfo); |
| return NULL; |
| |
| } |
| |
| static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t) |
| { |
| ASN1_TIME *tt; |
| int r = 0; |
| if (t) |
| tt = t; |
| else |
| tt = X509_gmtime_adj(NULL, 0); |
| |
| if (!tt) |
| goto merr; |
| |
| if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime, |
| tt->type, tt, -1) <= 0) |
| goto merr; |
| |
| r = 1; |
| |
| merr: |
| |
| if (!t) |
| ASN1_TIME_free(tt); |
| |
| if (!r) |
| CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE); |
| |
| return r; |
| |
| } |
| |
| EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si) |
| { |
| return si->pctx; |
| } |
| |
| EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si) |
| { |
| return si->mctx; |
| } |
| |
| STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms) |
| { |
| CMS_SignedData *sd; |
| sd = cms_get0_signed(cms); |
| if (!sd) |
| return NULL; |
| return sd->signerInfos; |
| } |
| |
| STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms) |
| { |
| STACK_OF(X509) *signers = NULL; |
| STACK_OF(CMS_SignerInfo) *sinfos; |
| CMS_SignerInfo *si; |
| int i; |
| sinfos = CMS_get0_SignerInfos(cms); |
| for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) { |
| si = sk_CMS_SignerInfo_value(sinfos, i); |
| if (si->signer) { |
| if (!signers) { |
| signers = sk_X509_new_null(); |
| if (!signers) |
| return NULL; |
| } |
| if (!sk_X509_push(signers, si->signer)) { |
| sk_X509_free(signers); |
| return NULL; |
| } |
| } |
| } |
| return signers; |
| } |
| |
| void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer) |
| { |
| if (signer) { |
| X509_up_ref(signer); |
| EVP_PKEY_free(si->pkey); |
| si->pkey = X509_get_pubkey(signer); |
| } |
| X509_free(si->signer); |
| si->signer = signer; |
| } |
| |
| int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, |
| ASN1_OCTET_STRING **keyid, |
| X509_NAME **issuer, ASN1_INTEGER **sno) |
| { |
| return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno); |
| } |
| |
| int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert) |
| { |
| return cms_SignerIdentifier_cert_cmp(si->sid, cert); |
| } |
| |
| int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts, |
| unsigned int flags) |
| { |
| CMS_SignedData *sd; |
| CMS_SignerInfo *si; |
| CMS_CertificateChoices *cch; |
| STACK_OF(CMS_CertificateChoices) *certs; |
| X509 *x; |
| int i, j; |
| int ret = 0; |
| sd = cms_get0_signed(cms); |
| if (!sd) |
| return -1; |
| certs = sd->certificates; |
| for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) { |
| si = sk_CMS_SignerInfo_value(sd->signerInfos, i); |
| if (si->signer) |
| continue; |
| |
| for (j = 0; j < sk_X509_num(scerts); j++) { |
| x = sk_X509_value(scerts, j); |
| if (CMS_SignerInfo_cert_cmp(si, x) == 0) { |
| CMS_SignerInfo_set1_signer_cert(si, x); |
| ret++; |
| break; |
| } |
| } |
| |
| if (si->signer || (flags & CMS_NOINTERN)) |
| continue; |
| |
| for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) { |
| cch = sk_CMS_CertificateChoices_value(certs, j); |
| if (cch->type != 0) |
| continue; |
| x = cch->d.certificate; |
| if (CMS_SignerInfo_cert_cmp(si, x) == 0) { |
| CMS_SignerInfo_set1_signer_cert(si, x); |
| ret++; |
| break; |
| } |
| } |
| } |
| return ret; |
| } |
| |
| void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, |
| X509 **signer, X509_ALGOR **pdig, |
| X509_ALGOR **psig) |
| { |
| if (pk) |
| *pk = si->pkey; |
| if (signer) |
| *signer = si->signer; |
| if (pdig) |
| *pdig = si->digestAlgorithm; |
| if (psig) |
| *psig = si->signatureAlgorithm; |
| } |
| |
| ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si) |
| { |
| return si->signature; |
| } |
| |
| static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms, |
| CMS_SignerInfo *si, BIO *chain) |
| { |
| EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
| int r = 0; |
| EVP_PKEY_CTX *pctx = NULL; |
| |
| if (mctx == NULL) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| |
| if (!si->pkey) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY); |
| goto err; |
| } |
| |
| if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm)) |
| goto err; |
| /* Set SignerInfo algorithm details if we used custom parameter */ |
| if (si->pctx && !cms_sd_asn1_ctrl(si, 0)) |
| goto err; |
| |
| /* |
| * If any signed attributes calculate and add messageDigest attribute |
| */ |
| |
| if (CMS_signed_get_attr_count(si) >= 0) { |
| ASN1_OBJECT *ctype = |
| cms->d.signedData->encapContentInfo->eContentType; |
| unsigned char md[EVP_MAX_MD_SIZE]; |
| unsigned int mdlen; |
| if (!EVP_DigestFinal_ex(mctx, md, &mdlen)) |
| goto err; |
| if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest, |
| V_ASN1_OCTET_STRING, md, mdlen)) |
| goto err; |
| /* Copy content type across */ |
| if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType, |
| V_ASN1_OBJECT, ctype, -1) <= 0) |
| goto err; |
| if (!CMS_SignerInfo_sign(si)) |
| goto err; |
| } else if (si->pctx) { |
| unsigned char *sig; |
| size_t siglen; |
| unsigned char md[EVP_MAX_MD_SIZE]; |
| unsigned int mdlen; |
| pctx = si->pctx; |
| if (!EVP_DigestFinal_ex(mctx, md, &mdlen)) |
| goto err; |
| siglen = EVP_PKEY_size(si->pkey); |
| sig = OPENSSL_malloc(siglen); |
| if (sig == NULL) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) { |
| OPENSSL_free(sig); |
| goto err; |
| } |
| ASN1_STRING_set0(si->signature, sig, siglen); |
| } else { |
| unsigned char *sig; |
| unsigned int siglen; |
| sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey)); |
| if (sig == NULL) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| if (!EVP_SignFinal(mctx, sig, &siglen, si->pkey)) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR); |
| OPENSSL_free(sig); |
| goto err; |
| } |
| ASN1_STRING_set0(si->signature, sig, siglen); |
| } |
| |
| r = 1; |
| |
| err: |
| EVP_MD_CTX_free(mctx); |
| EVP_PKEY_CTX_free(pctx); |
| return r; |
| |
| } |
| |
| int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain) |
| { |
| STACK_OF(CMS_SignerInfo) *sinfos; |
| CMS_SignerInfo *si; |
| int i; |
| sinfos = CMS_get0_SignerInfos(cms); |
| for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) { |
| si = sk_CMS_SignerInfo_value(sinfos, i); |
| if (!cms_SignerInfo_content_sign(cms, si, chain)) |
| return 0; |
| } |
| cms->d.signedData->encapContentInfo->partial = 0; |
| return 1; |
| } |
| |
| int CMS_SignerInfo_sign(CMS_SignerInfo *si) |
| { |
| EVP_MD_CTX *mctx = si->mctx; |
| EVP_PKEY_CTX *pctx = NULL; |
| unsigned char *abuf = NULL; |
| int alen; |
| size_t siglen; |
| const EVP_MD *md = NULL; |
| |
| md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm); |
| if (md == NULL) |
| return 0; |
| |
| if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) { |
| if (!cms_add1_signingTime(si, NULL)) |
| goto err; |
| } |
| |
| if (si->pctx) |
| pctx = si->pctx; |
| else { |
| EVP_MD_CTX_reset(mctx); |
| if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0) |
| goto err; |
| si->pctx = pctx; |
| } |
| |
| if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
| EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR); |
| goto err; |
| } |
| |
| alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf, |
| ASN1_ITEM_rptr(CMS_Attributes_Sign)); |
| if (!abuf) |
| goto err; |
| if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0) |
| goto err; |
| if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0) |
| goto err; |
| OPENSSL_free(abuf); |
| abuf = OPENSSL_malloc(siglen); |
| if (abuf == NULL) |
| goto err; |
| if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0) |
| goto err; |
| |
| if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
| EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR); |
| goto err; |
| } |
| |
| EVP_MD_CTX_reset(mctx); |
| |
| ASN1_STRING_set0(si->signature, abuf, siglen); |
| |
| return 1; |
| |
| err: |
| OPENSSL_free(abuf); |
| EVP_MD_CTX_reset(mctx); |
| return 0; |
| |
| } |
| |
| int CMS_SignerInfo_verify(CMS_SignerInfo *si) |
| { |
| EVP_MD_CTX *mctx = NULL; |
| unsigned char *abuf = NULL; |
| int alen, r = -1; |
| const EVP_MD *md = NULL; |
| |
| if (!si->pkey) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY); |
| return -1; |
| } |
| |
| md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm); |
| if (md == NULL) |
| return -1; |
| if (si->mctx == NULL && (si->mctx = EVP_MD_CTX_new()) == NULL) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| mctx = si->mctx; |
| if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0) |
| goto err; |
| |
| if (!cms_sd_asn1_ctrl(si, 1)) |
| goto err; |
| |
| alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf, |
| ASN1_ITEM_rptr(CMS_Attributes_Verify)); |
| if (!abuf) |
| goto err; |
| r = EVP_DigestVerifyUpdate(mctx, abuf, alen); |
| OPENSSL_free(abuf); |
| if (r <= 0) { |
| r = -1; |
| goto err; |
| } |
| r = EVP_DigestVerifyFinal(mctx, |
| si->signature->data, si->signature->length); |
| if (r <= 0) |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE); |
| err: |
| EVP_MD_CTX_reset(mctx); |
| return r; |
| } |
| |
| /* Create a chain of digest BIOs from a CMS ContentInfo */ |
| |
| BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms) |
| { |
| int i; |
| CMS_SignedData *sd; |
| BIO *chain = NULL; |
| sd = cms_get0_signed(cms); |
| if (!sd) |
| return NULL; |
| if (cms->d.signedData->encapContentInfo->partial) |
| cms_sd_set_version(sd); |
| for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) { |
| X509_ALGOR *digestAlgorithm; |
| BIO *mdbio; |
| digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i); |
| mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm); |
| if (!mdbio) |
| goto err; |
| if (chain) |
| BIO_push(chain, mdbio); |
| else |
| chain = mdbio; |
| } |
| return chain; |
| err: |
| BIO_free_all(chain); |
| return NULL; |
| } |
| |
| int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain) |
| { |
| ASN1_OCTET_STRING *os = NULL; |
| EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
| EVP_PKEY_CTX *pkctx = NULL; |
| int r = -1; |
| unsigned char mval[EVP_MAX_MD_SIZE]; |
| unsigned int mlen; |
| |
| if (mctx == NULL) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| /* If we have any signed attributes look for messageDigest value */ |
| if (CMS_signed_get_attr_count(si) >= 0) { |
| os = CMS_signed_get0_data_by_OBJ(si, |
| OBJ_nid2obj(NID_pkcs9_messageDigest), |
| -3, V_ASN1_OCTET_STRING); |
| if (!os) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, |
| CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE); |
| goto err; |
| } |
| } |
| |
| if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm)) |
| goto err; |
| |
| if (EVP_DigestFinal_ex(mctx, mval, &mlen) <= 0) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, |
| CMS_R_UNABLE_TO_FINALIZE_CONTEXT); |
| goto err; |
| } |
| |
| /* If messageDigest found compare it */ |
| |
| if (os) { |
| if (mlen != (unsigned int)os->length) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, |
| CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH); |
| goto err; |
| } |
| |
| if (memcmp(mval, os->data, mlen)) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, |
| CMS_R_VERIFICATION_FAILURE); |
| r = 0; |
| } else |
| r = 1; |
| } else { |
| const EVP_MD *md = EVP_MD_CTX_md(mctx); |
| pkctx = EVP_PKEY_CTX_new(si->pkey, NULL); |
| if (pkctx == NULL) |
| goto err; |
| if (EVP_PKEY_verify_init(pkctx) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0) |
| goto err; |
| si->pctx = pkctx; |
| if (!cms_sd_asn1_ctrl(si, 1)) |
| goto err; |
| r = EVP_PKEY_verify(pkctx, si->signature->data, |
| si->signature->length, mval, mlen); |
| if (r <= 0) { |
| CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, |
| CMS_R_VERIFICATION_FAILURE); |
| r = 0; |
| } |
| } |
| |
| err: |
| EVP_PKEY_CTX_free(pkctx); |
| EVP_MD_CTX_free(mctx); |
| return r; |
| |
| } |
| |
| int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs) |
| { |
| unsigned char *smder = NULL; |
| int smderlen, r; |
| smderlen = i2d_X509_ALGORS(algs, &smder); |
| if (smderlen <= 0) |
| return 0; |
| r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities, |
| V_ASN1_SEQUENCE, smder, smderlen); |
| OPENSSL_free(smder); |
| return r; |
| } |
| |
| int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs, |
| int algnid, int keysize) |
| { |
| X509_ALGOR *alg; |
| ASN1_INTEGER *key = NULL; |
| if (keysize > 0) { |
| key = ASN1_INTEGER_new(); |
| if (key == NULL || !ASN1_INTEGER_set(key, keysize)) |
| return 0; |
| } |
| alg = X509_ALGOR_new(); |
| if (alg == NULL) { |
| ASN1_INTEGER_free(key); |
| return 0; |
| } |
| |
| X509_ALGOR_set0(alg, OBJ_nid2obj(algnid), |
| key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key); |
| if (*algs == NULL) |
| *algs = sk_X509_ALGOR_new_null(); |
| if (*algs == NULL || !sk_X509_ALGOR_push(*algs, alg)) { |
| X509_ALGOR_free(alg); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Check to see if a cipher exists and if so add S/MIME capabilities */ |
| |
| static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg) |
| { |
| if (EVP_get_cipherbynid(nid)) |
| return CMS_add_simple_smimecap(sk, nid, arg); |
| return 1; |
| } |
| |
| static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg) |
| { |
| if (EVP_get_digestbynid(nid)) |
| return CMS_add_simple_smimecap(sk, nid, arg); |
| return 1; |
| } |
| |
| int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap) |
| { |
| if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1) |
| || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1) |
| || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1) |
| || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1) |
| || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) |
| || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1) |
| || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1) |
| || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) |
| || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128) |
| || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64) |
| || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1) |
| || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40)) |
| return 0; |
| return 1; |
| } |
