--- /dev/null
+/* 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/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:
+ sid->d.issuerAndSerialNumber =
+ M_ASN1_new_of(CMS_IssuerAndSerialNumber);
+ if (!sid->d.issuerAndSerialNumber)
+ goto merr;
+ if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
+ X509_get_issuer_name(cert)))
+ goto merr;
+ if (!ASN1_STRING_copy(
+ sid->d.issuerAndSerialNumber->serialNumber,
+ X509_get_serialNumber(cert)))
+ goto merr;
+ break;
+
+ case CMS_SIGNERINFO_KEYIDENTIFIER:
+ if (!cert->skid)
+ {
+ CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
+ CMS_R_CERTIFICATE_HAS_NO_KEYID);
+ return 0;
+ }
+ sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid);
+ if (!sid->d.subjectKeyIdentifier)
+ goto merr;
+ break;
+
+ default:
+ CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
+ return 0;
+ }
+
+ sid->type = type;
+
+ return 1;
+
+ merr:
+ CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE);
+ return 0;
+
+ }
+
+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)
+ {
+ int ret;
+ if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
+ {
+ ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer,
+ X509_get_issuer_name(cert));
+ if (ret)
+ return ret;
+ return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber,
+ X509_get_serialNumber(cert));
+ }
+ else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
+ {
+ X509_check_purpose(cert, -1, -1);
+ if (!cert->skid)
+ return -1;
+ return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier,
+ cert->skid);
+ }
+ else
+ 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;
+
+ 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 (pk->ameth && pk->ameth->pkey_ctrl)
+ {
+ i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_SIGN,
+ 0, si);
+ if (i == -2)
+ {
+ CMSerr(CMS_F_CMS_ADD1_SIGNER,
+ CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+ goto err;
+ }
+ if (i <= 0)
+ {
+ CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_CTRL_FAILURE);
+ 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_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 (!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;
+
+ }
+
+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;
+ }
+
+static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
+ CMS_SignerInfo *si, BIO *chain)
+ {
+ EVP_MD_CTX mctx;
+ int r = 0;
+ 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;
+
+ /* 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
+ {
+ 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);
+ 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;
+ 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;
+
+ EVP_MD_CTX_init(&mctx);
+
+ if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
+ {
+ if (!cms_add1_signingTime(si, NULL))
+ goto err;
+ }
+
+ 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;
+ EVP_PKEY_CTX *pctx;
+ 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, &pctx, md, NULL, si->pkey) <= 0)
+ 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;
+ int r = -1;
+ 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 messageDigest found compare it */
+
+ if (os)
+ {
+ unsigned char mval[EVP_MAX_MD_SIZE];
+ unsigned int mlen;
+ if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
+ {
+ CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
+ CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
+ goto err;
+ }
+ 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
+ {
+ r = EVP_VerifyFinal(&mctx, si->signature->data,
+ si->signature->length, si->pkey);
+ if (r <= 0)
+ {
+ CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
+ CMS_R_VERIFICATION_FAILURE);
+ r = 0;
+ }
+ }
+
+ err:
+ 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;
+ }
projects / cassiopeia.git / blobdiff