146b52edd1
continue with symmetric decryption process to avoid leaking timing information to an attacker. Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this issue. (CVE-2012-0884)
850 lines
19 KiB
C
850 lines
19 KiB
C
/* 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 "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"
|
|
|
|
static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
|
|
{
|
|
unsigned char buf[4096];
|
|
int r = 0, i;
|
|
BIO *tmpout = NULL;
|
|
|
|
if (out == NULL)
|
|
tmpout = BIO_new(BIO_s_null());
|
|
else if (flags & CMS_TEXT)
|
|
{
|
|
tmpout = BIO_new(BIO_s_mem());
|
|
BIO_set_mem_eof_return(tmpout, 0);
|
|
}
|
|
else
|
|
tmpout = out;
|
|
|
|
if(!tmpout)
|
|
{
|
|
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 && (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 != 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)
|
|
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;
|
|
|
|
if (!dcont && !check_content(cms))
|
|
return 0;
|
|
|
|
/* 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);
|
|
return 0;
|
|
}
|
|
}
|
|
else
|
|
tmpin = dcont;
|
|
|
|
|
|
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 (dcont && (tmpin == dcont))
|
|
do_free_upto(cmsbio, dcont);
|
|
else
|
|
BIO_free_all(cmsbio);
|
|
|
|
if (cms_certs)
|
|
sk_X509_pop_free(cms_certs, X509_free);
|
|
if (crls)
|
|
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 || !CMS_SignedData_init(cms))
|
|
goto merr;
|
|
|
|
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:
|
|
if (cms)
|
|
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:
|
|
if (rct_cont)
|
|
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:
|
|
if (cms)
|
|
CMS_ContentInfo_free(cms);
|
|
return NULL;
|
|
}
|
|
|
|
int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
|
|
{
|
|
STACK_OF(CMS_RecipientInfo) *ris;
|
|
CMS_RecipientInfo *ri;
|
|
int i, r;
|
|
int debug = 0;
|
|
ris = CMS_get0_RecipientInfos(cms);
|
|
if (ris)
|
|
debug = cms->d.envelopedData->encryptedContentInfo->debug;
|
|
for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
|
|
{
|
|
ri = sk_CMS_RecipientInfo_value(ris, i);
|
|
if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
|
|
continue;
|
|
/* If we have a cert try matching RecipientInfo
|
|
* otherwise try them all.
|
|
*/
|
|
if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
|
|
{
|
|
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 (!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)))
|
|
{
|
|
CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
|
|
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
|