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openssl/crypto/cms/cms_smime.c
Matt Caswell 90945fa31a Continue standardising malloc style for libcrypto 
Continuing from previous commit ensure our style is consistent for malloc
return checks.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2015-11-09 22:48:41 +00:00

886 lines
25 KiB
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/* crypto/cms/cms_smime.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 "internal/cryptlib.h"
#include <openssl/asn1t.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"
static BIO *cms_get_text_bio(BIO *out, unsigned int flags)
{
BIO *rbio;
if (out == NULL)
rbio = BIO_new(BIO_s_null());
else if (flags & CMS_TEXT) {
rbio = BIO_new(BIO_s_mem());
BIO_set_mem_eof_return(rbio, 0);
} else
rbio = out;
return rbio;
}
static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
{
unsigned char buf[4096];
int r = 0, i;
BIO *tmpout;
tmpout = cms_get_text_bio(out, flags);
if (tmpout == NULL) {
CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
goto err;
}
/* Read all content through chain to process digest, decrypt etc */
for (;;) {
i = BIO_read(in, buf, sizeof(buf));
if (i <= 0) {
if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
if (!BIO_get_cipher_status(in))
goto err;
}
if (i < 0)
goto err;
break;
}
if (tmpout && (BIO_write(tmpout, buf, i) != i))
goto err;
}
if (flags & CMS_TEXT) {
if (!SMIME_text(tmpout, out)) {
CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
goto err;
}
}
r = 1;
err:
if (tmpout != out)
BIO_free(tmpout);
return r;
}
static int check_content(CMS_ContentInfo *cms)
{
ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
if (!pos || !*pos) {
CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
return 0;
}
return 1;
}
static void do_free_upto(BIO *f, BIO *upto)
{
if (upto) {
BIO *tbio;
do {
tbio = BIO_pop(f);
BIO_free(f);
f = tbio;
}
while (f && f != upto);
} else
BIO_free_all(f);
}
int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
{
BIO *cont;
int r;
if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
return 0;
}
cont = CMS_dataInit(cms, NULL);
if (!cont)
return 0;
r = cms_copy_content(out, cont, flags);
BIO_free_all(cont);
return r;
}
CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
{
CMS_ContentInfo *cms;
cms = cms_Data_create();
if (!cms)
return NULL;
if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
return cms;
CMS_ContentInfo_free(cms);
return NULL;
}
int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
unsigned int flags)
{
BIO *cont;
int r;
if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
return 0;
}
if (!dcont && !check_content(cms))
return 0;
cont = CMS_dataInit(cms, dcont);
if (!cont)
return 0;
r = cms_copy_content(out, cont, flags);
if (r)
r = cms_DigestedData_do_final(cms, cont, 1);
do_free_upto(cont, dcont);
return r;
}
CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
unsigned int flags)
{
CMS_ContentInfo *cms;
if (!md)
md = EVP_sha1();
cms = cms_DigestedData_create(md);
if (!cms)
return NULL;
if (!(flags & CMS_DETACHED))
CMS_set_detached(cms, 0);
if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
return cms;
CMS_ContentInfo_free(cms);
return NULL;
}
int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
const unsigned char *key, size_t keylen,
BIO *dcont, BIO *out, unsigned int flags)
{
BIO *cont;
int r;
if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
CMS_R_TYPE_NOT_ENCRYPTED_DATA);
return 0;
}
if (!dcont && !check_content(cms))
return 0;
if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
return 0;
cont = CMS_dataInit(cms, dcont);
if (!cont)
return 0;
r = cms_copy_content(out, cont, flags);
do_free_upto(cont, dcont);
return r;
}
CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
const unsigned char *key,
size_t keylen, unsigned int flags)
{
CMS_ContentInfo *cms;
if (!cipher) {
CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
return NULL;
}
cms = CMS_ContentInfo_new();
if (cms == NULL)
return NULL;
if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
return NULL;
if (!(flags & CMS_DETACHED))
CMS_set_detached(cms, 0);
if ((flags & (CMS_STREAM | CMS_PARTIAL))
|| CMS_final(cms, in, NULL, flags))
return cms;
CMS_ContentInfo_free(cms);
return NULL;
}
static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
X509_STORE *store,
STACK_OF(X509) *certs,
STACK_OF(X509_CRL) *crls,
unsigned int flags)
{
X509_STORE_CTX ctx;
X509 *signer;
int i, j, r = 0;
CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) {
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
goto err;
}
X509_STORE_CTX_set_default(&ctx, "smime_sign");
if (crls)
X509_STORE_CTX_set0_crls(&ctx, crls);
i = X509_verify_cert(&ctx);
if (i <= 0) {
j = X509_STORE_CTX_get_error(&ctx);
CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
CMS_R_CERTIFICATE_VERIFY_ERROR);
ERR_add_error_data(2, "Verify error:",
X509_verify_cert_error_string(j));
goto err;
}
r = 1;
err:
X509_STORE_CTX_cleanup(&ctx);
return r;
}
int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
{
CMS_SignerInfo *si;
STACK_OF(CMS_SignerInfo) *sinfos;
STACK_OF(X509) *cms_certs = NULL;
STACK_OF(X509_CRL) *crls = NULL;
X509 *signer;
int i, scount = 0, ret = 0;
BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
if (!dcont && !check_content(cms))
return 0;
if (dcont && !(flags & CMS_BINARY)) {
const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
flags |= CMS_ASCIICRLF;
}
/* Attempt to find all signer certificates */
sinfos = CMS_get0_SignerInfos(cms);
if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
goto err;
}
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
si = sk_CMS_SignerInfo_value(sinfos, i);
CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
if (signer)
scount++;
}
if (scount != sk_CMS_SignerInfo_num(sinfos))
scount += CMS_set1_signers_certs(cms, certs, flags);
if (scount != sk_CMS_SignerInfo_num(sinfos)) {
CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
goto err;
}
/* Attempt to verify all signers certs */
if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
cms_certs = CMS_get1_certs(cms);
if (!(flags & CMS_NOCRL))
crls = CMS_get1_crls(cms);
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
si = sk_CMS_SignerInfo_value(sinfos, i);
if (!cms_signerinfo_verify_cert(si, store,
cms_certs, crls, flags))
goto err;
}
}
/* Attempt to verify all SignerInfo signed attribute signatures */
if (!(flags & CMS_NO_ATTR_VERIFY)) {
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
si = sk_CMS_SignerInfo_value(sinfos, i);
if (CMS_signed_get_attr_count(si) < 0)
continue;
if (CMS_SignerInfo_verify(si) <= 0)
goto err;
}
}
/*
* Performance optimization: if the content is a memory BIO then store
* its contents in a temporary read only memory BIO. This avoids
* potentially large numbers of slow copies of data which will occur when
* reading from a read write memory BIO when signatures are calculated.
*/
if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
char *ptr;
long len;
len = BIO_get_mem_data(dcont, &ptr);
tmpin = BIO_new_mem_buf(ptr, len);
if (tmpin == NULL) {
CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
goto err2;
}
} else
tmpin = dcont;
/*
* If not binary mode and detached generate digests by *writing* through
* the BIO. That makes it possible to canonicalise the input.
*/
if (!(flags & SMIME_BINARY) && dcont) {
/*
* Create output BIO so we can either handle text or to ensure
* included content doesn't override detached content.
*/
tmpout = cms_get_text_bio(out, flags);
if (!tmpout) {
CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
goto err;
}
cmsbio = CMS_dataInit(cms, tmpout);
if (!cmsbio)
goto err;
/*
* Don't use SMIME_TEXT for verify: it adds headers and we want to
* remove them.
*/
SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
if (flags & CMS_TEXT) {
if (!SMIME_text(tmpout, out)) {
CMSerr(CMS_F_CMS_VERIFY, CMS_R_SMIME_TEXT_ERROR);
goto err;
}
}
} else {
cmsbio = CMS_dataInit(cms, tmpin);
if (!cmsbio)
goto err;
if (!cms_copy_content(out, cmsbio, flags))
goto err;
}
if (!(flags & CMS_NO_CONTENT_VERIFY)) {
for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
si = sk_CMS_SignerInfo_value(sinfos, i);
if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
goto err;
}
}
}
ret = 1;
err:
if (!(flags & SMIME_BINARY) && dcont) {
do_free_upto(cmsbio, tmpout);
if (tmpin != dcont)
BIO_free(tmpin);
} else {
if (dcont && (tmpin == dcont))
do_free_upto(cmsbio, dcont);
else
BIO_free_all(cmsbio);
}
if (out != tmpout)
BIO_free_all(tmpout);
err2:
sk_X509_pop_free(cms_certs, X509_free);
sk_X509_CRL_pop_free(crls, X509_CRL_free);
return ret;
}
int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
STACK_OF(X509) *certs,
X509_STORE *store, unsigned int flags)
{
int r;
flags &= ~(CMS_DETACHED | CMS_TEXT);
r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
if (r <= 0)
return r;
return cms_Receipt_verify(rcms, ocms);
}
CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
STACK_OF(X509) *certs, BIO *data,
unsigned int flags)
{
CMS_ContentInfo *cms;
int i;
cms = CMS_ContentInfo_new();
if (cms == NULL || !CMS_SignedData_init(cms))
goto merr;
if (flags & CMS_ASCIICRLF
&& !CMS_set1_eContentType(cms,
OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
goto err;
if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
goto err;
}
for (i = 0; i < sk_X509_num(certs); i++) {
X509 *x = sk_X509_value(certs, i);
if (!CMS_add1_cert(cms, x))
goto merr;
}
if (!(flags & CMS_DETACHED))
CMS_set_detached(cms, 0);
if ((flags & (CMS_STREAM | CMS_PARTIAL))
|| CMS_final(cms, data, NULL, flags))
return cms;
else
goto err;
merr:
CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
err:
CMS_ContentInfo_free(cms);
return NULL;
}
CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
X509 *signcert, EVP_PKEY *pkey,
STACK_OF(X509) *certs, unsigned int flags)
{
CMS_SignerInfo *rct_si;
CMS_ContentInfo *cms = NULL;
ASN1_OCTET_STRING **pos, *os;
BIO *rct_cont = NULL;
int r = 0;
flags &= ~(CMS_STREAM | CMS_TEXT);
/* Not really detached but avoids content being allocated */
flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
if (!pkey || !signcert) {
CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
return NULL;
}
/* Initialize signed data */
cms = CMS_sign(NULL, NULL, certs, NULL, flags);
if (!cms)
goto err;
/* Set inner content type to signed receipt */
if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
goto err;
rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
if (!rct_si) {
CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
goto err;
}
os = cms_encode_Receipt(si);
if (!os)
goto err;
/* Set content to digest */
rct_cont = BIO_new_mem_buf(os->data, os->length);
if (!rct_cont)
goto err;
/* Add msgSigDigest attribute */
if (!cms_msgSigDigest_add1(rct_si, si))
goto err;
/* Finalize structure */
if (!CMS_final(cms, rct_cont, NULL, flags))
goto err;
/* Set embedded content */
pos = CMS_get0_content(cms);
*pos = os;
r = 1;
err:
BIO_free(rct_cont);
if (r)
return cms;
CMS_ContentInfo_free(cms);
return NULL;
}
CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
const EVP_CIPHER *cipher, unsigned int flags)
{
CMS_ContentInfo *cms;
int i;
X509 *recip;
cms = CMS_EnvelopedData_create(cipher);
if (!cms)
goto merr;
for (i = 0; i < sk_X509_num(certs); i++) {
recip = sk_X509_value(certs, i);
if (!CMS_add1_recipient_cert(cms, recip, flags)) {
CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
goto err;
}
}
if (!(flags & CMS_DETACHED))
CMS_set_detached(cms, 0);
if ((flags & (CMS_STREAM | CMS_PARTIAL))
|| CMS_final(cms, data, NULL, flags))
return cms;
else
goto err;
merr:
CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
err:
CMS_ContentInfo_free(cms);
return NULL;
}
static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
EVP_PKEY *pk, X509 *cert)
{
int i;
STACK_OF(CMS_RecipientEncryptedKey) *reks;
CMS_RecipientEncryptedKey *rek;
reks = CMS_RecipientInfo_kari_get0_reks(ri);
if (!cert)
return 0;
for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
int rv;
rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
continue;
CMS_RecipientInfo_kari_set0_pkey(ri, pk);
rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
if (rv > 0)
return 1;
return -1;
}
return 0;
}
int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
{
STACK_OF(CMS_RecipientInfo) *ris;
CMS_RecipientInfo *ri;
int i, r, ri_type;
int debug = 0, match_ri = 0;
ris = CMS_get0_RecipientInfos(cms);
if (ris)
debug = cms->d.envelopedData->encryptedContentInfo->debug;
ri_type = cms_pkey_get_ri_type(pk);
if (ri_type == CMS_RECIPINFO_NONE) {
CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
return 0;
}
for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
ri = sk_CMS_RecipientInfo_value(ris, i);
if (CMS_RecipientInfo_type(ri) != ri_type)
continue;
match_ri = 1;
if (ri_type == CMS_RECIPINFO_AGREE) {
r = cms_kari_set1_pkey(cms, ri, pk, cert);
if (r > 0)
return 1;
if (r < 0)
return 0;
}
/*
* If we have a cert try matching RecipientInfo otherwise try them
* all.
*/
else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
CMS_RecipientInfo_set0_pkey(ri, pk);
r = CMS_RecipientInfo_decrypt(cms, ri);
CMS_RecipientInfo_set0_pkey(ri, NULL);
if (cert) {
/*
* If not debugging clear any error and return success to
* avoid leaking of information useful to MMA
*/
if (!debug) {
ERR_clear_error();
return 1;
}
if (r > 0)
return 1;
CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
return 0;
}
/*
* If no cert and not debugging don't leave loop after first
* successful decrypt. Always attempt to decrypt all recipients
* to avoid leaking timing of a successful decrypt.
*/
else if (r > 0 && debug)
return 1;
}
}
/* If no cert and not debugging always return success */
if (match_ri && !cert && !debug) {
ERR_clear_error();
return 1;
}
CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
return 0;
}
int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
unsigned char *key, size_t keylen,
unsigned char *id, size_t idlen)
{
STACK_OF(CMS_RecipientInfo) *ris;
CMS_RecipientInfo *ri;
int i, r;
ris = CMS_get0_RecipientInfos(cms);
for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
ri = sk_CMS_RecipientInfo_value(ris, i);
if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
continue;
/*
* If we have an id try matching RecipientInfo otherwise try them
* all.
*/
if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
CMS_RecipientInfo_set0_key(ri, key, keylen);
r = CMS_RecipientInfo_decrypt(cms, ri);
CMS_RecipientInfo_set0_key(ri, NULL, 0);
if (r > 0)
return 1;
if (id) {
CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
return 0;
}
ERR_clear_error();
}
}
CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
return 0;
}
int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
unsigned char *pass, ossl_ssize_t passlen)
{
STACK_OF(CMS_RecipientInfo) *ris;
CMS_RecipientInfo *ri;
int i, r;
ris = CMS_get0_RecipientInfos(cms);
for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
ri = sk_CMS_RecipientInfo_value(ris, i);
if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
continue;
CMS_RecipientInfo_set0_password(ri, pass, passlen);
r = CMS_RecipientInfo_decrypt(cms, ri);
CMS_RecipientInfo_set0_password(ri, NULL, 0);
if (r > 0)
return 1;
}
CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
return 0;
}
int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
BIO *dcont, BIO *out, unsigned int flags)
{
int r;
BIO *cont;
if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
return 0;
}
if (!dcont && !check_content(cms))
return 0;
if (flags & CMS_DEBUG_DECRYPT)
cms->d.envelopedData->encryptedContentInfo->debug = 1;
else
cms->d.envelopedData->encryptedContentInfo->debug = 0;
if (!pk && !cert && !dcont && !out)
return 1;
if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
return 0;
cont = CMS_dataInit(cms, dcont);
if (!cont)
return 0;
r = cms_copy_content(out, cont, flags);
do_free_upto(cont, dcont);
return r;
}
int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
{
BIO *cmsbio;
int ret = 0;
if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_LIB);
return 0;
}
SMIME_crlf_copy(data, cmsbio, flags);
(void)BIO_flush(cmsbio);
if (!CMS_dataFinal(cms, cmsbio)) {
CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
goto err;
}
ret = 1;
err:
do_free_upto(cmsbio, dcont);
return ret;
}
#ifdef ZLIB
int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
unsigned int flags)
{
BIO *cont;
int r;
if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
return 0;
}
if (!dcont && !check_content(cms))
return 0;
cont = CMS_dataInit(cms, dcont);
if (!cont)
return 0;
r = cms_copy_content(out, cont, flags);
do_free_upto(cont, dcont);
return r;
}
CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
{
CMS_ContentInfo *cms;
if (comp_nid <= 0)
comp_nid = NID_zlib_compression;
cms = cms_CompressedData_create(comp_nid);
if (!cms)
return NULL;
if (!(flags & CMS_DETACHED))
CMS_set_detached(cms, 0);
if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
return cms;
CMS_ContentInfo_free(cms);
return NULL;
}
#else
int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
unsigned int flags)
{
CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
return 0;
}
CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
{
CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
return NULL;
}
#endif
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