mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-12 03:48:25 -05:00
935 lines
21 KiB
C
935 lines
21 KiB
C
|
/* $OpenBSD: cms_smime.c,v 1.24 2019/10/04 18:03:56 tb Exp $ */
|
||
|
/*
|
||
|
* 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"
|
||
|
#include "asn1/asn1_locl.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) {
|
||
|
CMSerror(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)) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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)
|
||
|
{
|
||
|
X509_STORE_CTX *ctx = X509_STORE_CTX_new();
|
||
|
X509 *signer;
|
||
|
int i, j, r = 0;
|
||
|
|
||
|
if (ctx == NULL) {
|
||
|
CMSerror(ERR_R_MALLOC_FAILURE);
|
||
|
goto err;
|
||
|
}
|
||
|
CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
|
||
|
if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
|
||
|
CMSerror(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);
|
||
|
CMSerror(CMS_R_CERTIFICATE_VERIFY_ERROR);
|
||
|
ERR_asprintf_error_data("Verify error: %s",
|
||
|
X509_verify_cert_error_string(j));
|
||
|
goto err;
|
||
|
}
|
||
|
r = 1;
|
||
|
|
||
|
err:
|
||
|
X509_STORE_CTX_free(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) {
|
||
|
CMSerror(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)) {
|
||
|
CMSerror(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))
|
||
|
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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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)) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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)) {
|
||
|
CMSerror(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:
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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)) {
|
||
|
CMSerror(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:
|
||
|
CMSerror(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);
|
||
|
for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
|
||
|
int rv;
|
||
|
|
||
|
rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
|
||
|
if (cert != NULL && 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 cert == NULL ? 0 : -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) {
|
||
|
CMSerror(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)) {
|
||
|
EVP_PKEY_up_ref(pk);
|
||
|
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;
|
||
|
CMSerror(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, key transport and not debugging always return success */
|
||
|
if (cert == NULL && ri_type == CMS_RECIPINFO_TRANS && match_ri && !debug) {
|
||
|
ERR_clear_error();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
CMSerror(CMS_R_NO_MATCHING_RECIPIENT);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
CMS_decrypt_set1_key(CMS_ContentInfo *cms, unsigned char *key, size_t keylen,
|
||
|
const 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) {
|
||
|
CMSerror(CMS_R_DECRYPT_ERROR);
|
||
|
return 0;
|
||
|
}
|
||
|
ERR_clear_error();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
CMSerror(CMS_R_NO_MATCHING_RECIPIENT);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
CMS_decrypt_set1_password(CMS_ContentInfo *cms, unsigned char *pass,
|
||
|
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;
|
||
|
}
|
||
|
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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 (!cert)
|
||
|
cms->d.envelopedData->encryptedContentInfo->havenocert = 1;
|
||
|
else
|
||
|
cms->d.envelopedData->encryptedContentInfo->havenocert = 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) {
|
||
|
CMSerror(CMS_R_CMS_LIB);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
SMIME_crlf_copy(data, cmsbio, flags);
|
||
|
|
||
|
(void)BIO_flush(cmsbio);
|
||
|
|
||
|
if (!CMS_dataFinal(cms, cmsbio)) {
|
||
|
CMSerror(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) {
|
||
|
CMSerror(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)
|
||
|
{
|
||
|
CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
CMS_ContentInfo *
|
||
|
CMS_compress(BIO *in, int comp_nid, unsigned int flags)
|
||
|
{
|
||
|
CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
#endif
|