diff options
Diffstat (limited to 'thirdparty/openssl/crypto/cms/cms_sd.c')
| -rw-r--r-- | thirdparty/openssl/crypto/cms/cms_sd.c | 957 |
1 files changed, 957 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/cms/cms_sd.c b/thirdparty/openssl/crypto/cms/cms_sd.c new file mode 100644 index 0000000000..a41aca8e12 --- /dev/null +++ b/thirdparty/openssl/crypto/cms/cms_sd.c @@ -0,0 +1,957 @@ +/* crypto/cms/cms_sd.c */ +/* + * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 2008 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + */ + +#include "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 "asn1_locl.h" + +/* CMS SignedData Utilities */ + +DECLARE_ASN1_ITEM(CMS_SignedData) + +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 initialize 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; + X509_check_purpose(signer, -1, -1); + + CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY); + CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509); + + si->pkey = pk; + si->signer = signer; + EVP_MD_CTX_init(&si->mctx); + si->pctx = NULL; + + 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; + } + + cms_DigestAlgorithm_set(si->digestAlgorithm, md); + + /* See if digest is present in digestAlgorithms */ + for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) { + 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) + goto merr; + cms_DigestAlgorithm_set(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)) { + /* + * Initialialize signed attributes strutucture 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) + 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: + if (si) + 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) { + CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509); + if (si->pkey) + EVP_PKEY_free(si->pkey); + si->pkey = X509_get_pubkey(signer); + } + if (si->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; + int r = 0; + EVP_PKEY_CTX *pctx = NULL; + EVP_MD_CTX_init(&mctx); + + if (!si->pkey) { + CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY); + return 0; + } + + if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm)) + goto err; + /* Set SignerInfo algortihm details if we used custom parametsr */ + 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) { + CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) + 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) { + 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_cleanup(&mctx); + if (pctx) + 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; + 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_init(mctx); + if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0) + goto err; + } + + 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) + 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_cleanup(mctx); + + ASN1_STRING_set0(si->signature, abuf, siglen); + + return 1; + + err: + if (abuf) + OPENSSL_free(abuf); + EVP_MD_CTX_cleanup(mctx); + return 0; + +} + +int CMS_SignerInfo_verify(CMS_SignerInfo *si) +{ + EVP_MD_CTX *mctx = &si->mctx; + 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; + EVP_MD_CTX_init(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_cleanup(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: + if (chain) + 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_PKEY_CTX *pkctx = NULL; + int r = -1; + unsigned char mval[EVP_MAX_MD_SIZE]; + unsigned int mlen; + EVP_MD_CTX_init(&mctx); + /* 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: + if (pkctx) + EVP_PKEY_CTX_free(pkctx); + EVP_MD_CTX_cleanup(&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 || !ASN1_INTEGER_set(key, keysize)) + return 0; + } + alg = X509_ALGOR_new(); + if (!alg) { + if (key) + ASN1_INTEGER_free(key); + return 0; + } + + X509_ALGOR_set0(alg, OBJ_nid2obj(algnid), + key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key); + if (!*algs) + *algs = sk_X509_ALGOR_new_null(); + if (!*algs || !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_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; +} |