7c8ced94c3
to EVP any more. Move locking #define into fips.h. Set FIPS locking callbacks at same time as OpenSSL locking callbacks.
399 lines
10 KiB
C
399 lines
10 KiB
C
/* fips_rsa_sign.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 2007.
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*/
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/* ====================================================================
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* Copyright (c) 2007 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#define OPENSSL_FIPSAPI
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#include <string.h>
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#include <openssl/evp.h>
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#include <openssl/rsa.h>
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#include <openssl/err.h>
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#include <openssl/sha.h>
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#ifdef OPENSSL_FIPS
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/* FIPS versions of RSA_sign() and RSA_verify().
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* These will only have to deal with SHA* signatures and by including
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* pregenerated encodings all ASN1 dependencies can be avoided
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*/
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/* Standard encodings including NULL parameter */
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static const unsigned char sha1_bin[] = {
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0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
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0x00, 0x04, 0x14
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};
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static const unsigned char sha224_bin[] = {
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0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c
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};
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static const unsigned char sha256_bin[] = {
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0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
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};
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static const unsigned char sha384_bin[] = {
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0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30
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};
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static const unsigned char sha512_bin[] = {
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0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40
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};
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/* Alternate encodings with absent parameters. We don't generate signature
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* using this format but do tolerate received signatures of this form.
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*/
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static unsigned char sha1_nn_bin[] = {
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0x30, 0x1f, 0x30, 0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04,
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0x14
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};
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static unsigned char sha224_nn_bin[] = {
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0x30, 0x2b, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x04, 0x04, 0x1c
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};
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static unsigned char sha256_nn_bin[] = {
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0x30, 0x2f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x01, 0x04, 0x20
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};
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static unsigned char sha384_nn_bin[] = {
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0x30, 0x3f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x02, 0x04, 0x30
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};
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static unsigned char sha512_nn_bin[] = {
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0x30, 0x4f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x03, 0x04, 0x40
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};
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static const unsigned char *fips_digestinfo_encoding(int nid, unsigned int *len)
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{
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switch (nid)
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{
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case NID_sha1:
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*len = sizeof(sha1_bin);
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return sha1_bin;
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case NID_sha224:
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*len = sizeof(sha224_bin);
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return sha224_bin;
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case NID_sha256:
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*len = sizeof(sha256_bin);
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return sha256_bin;
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case NID_sha384:
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*len = sizeof(sha384_bin);
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return sha384_bin;
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case NID_sha512:
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*len = sizeof(sha512_bin);
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return sha512_bin;
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default:
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return NULL;
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}
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}
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static const unsigned char *fips_digestinfo_nn_encoding(int nid, unsigned int *len)
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{
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switch (nid)
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{
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case NID_sha1:
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*len = sizeof(sha1_nn_bin);
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return sha1_nn_bin;
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case NID_sha224:
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*len = sizeof(sha224_nn_bin);
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return sha224_nn_bin;
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case NID_sha256:
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*len = sizeof(sha256_nn_bin);
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return sha256_nn_bin;
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case NID_sha384:
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*len = sizeof(sha384_nn_bin);
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return sha384_nn_bin;
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case NID_sha512:
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*len = sizeof(sha512_nn_bin);
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return sha512_nn_bin;
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default:
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return NULL;
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}
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}
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int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
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int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
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unsigned char *sigret, unsigned int *siglen)
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{
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int i=0,j,ret=0;
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unsigned int dlen;
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const unsigned char *der;
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unsigned int m_len;
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const EVP_MD *mhash;
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int md_type;
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/* Largest DigestInfo: 19 (max encoding) + max MD */
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unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
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unsigned char md[EVP_MAX_MD_SIZE + 1];
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EVP_DigestFinal_ex(ctx, md, &m_len);
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mhash = M_EVP_MD_CTX_md(ctx);
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md_type = M_EVP_MD_type(mhash);
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if (rsa_pad_mode == RSA_X931_PADDING)
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{
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int hash_id;
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memcpy(tmpdinfo, md, m_len);
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hash_id = RSA_X931_hash_id(md_type);
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if (hash_id == -1)
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{
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RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
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return 0;
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}
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tmpdinfo[m_len] = (unsigned char)hash_id;
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i = m_len + 1;
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}
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else if (rsa_pad_mode == RSA_PKCS1_PADDING)
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{
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der = fips_digestinfo_encoding(md_type, &dlen);
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if (!der)
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{
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RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
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return 0;
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}
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memcpy(tmpdinfo, der, dlen);
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memcpy(tmpdinfo + dlen, md, m_len);
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i = dlen + m_len;
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}
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else if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
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{
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unsigned char *sbuf;
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i = RSA_size(rsa);
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sbuf = OPENSSL_malloc(RSA_size(rsa));
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if (!sbuf)
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{
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RSAerr(RSA_F_FIPS_RSA_SIGN,ERR_R_MALLOC_FAILURE);
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goto psserr;
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}
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if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa, sbuf, md, mhash,
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mgf1Hash, saltlen))
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goto psserr;
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j=rsa->meth->rsa_priv_enc(i,sbuf,sigret,rsa,RSA_NO_PADDING);
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if (j > 0)
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{
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ret=1;
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*siglen=j;
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}
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psserr:
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OPENSSL_cleanse(md,m_len);
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OPENSSL_cleanse(sbuf, i);
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OPENSSL_free(sbuf);
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return ret;
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}
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j=RSA_size(rsa);
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if (i > (j-RSA_PKCS1_PADDING_SIZE))
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{
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RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
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goto done;
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}
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/* NB: call underlying method directly to avoid FIPS blocking */
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j=rsa->meth->rsa_priv_enc(i,tmpdinfo,sigret,rsa,rsa_pad_mode);
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if (j > 0)
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{
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ret=1;
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*siglen=j;
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}
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done:
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OPENSSL_cleanse(tmpdinfo,i);
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OPENSSL_cleanse(md,m_len);
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return ret;
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}
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int FIPS_rsa_verify_ctx(RSA *rsa, EVP_MD_CTX *ctx,
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int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
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unsigned char *sigbuf, unsigned int siglen)
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{
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int i,ret=0;
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unsigned int dlen, diglen;
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unsigned char *s;
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const unsigned char *der;
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unsigned char dig[EVP_MAX_MD_SIZE];
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const EVP_MD *mhash;
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int md_type;
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int rsa_dec_pad_mode;
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if (siglen != (unsigned int)RSA_size(rsa))
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
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return(0);
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}
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mhash = M_EVP_MD_CTX_md(ctx);
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md_type = M_EVP_MD_type(mhash);
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EVP_DigestFinal_ex(ctx, dig, &diglen);
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s= OPENSSL_malloc((unsigned int)siglen);
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if (s == NULL)
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
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rsa_dec_pad_mode = RSA_NO_PADDING;
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else
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rsa_dec_pad_mode = rsa_pad_mode;
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/* NB: call underlying method directly to avoid FIPS blocking */
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i=rsa->meth->rsa_pub_dec((int)siglen,sigbuf,s, rsa, rsa_dec_pad_mode);
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if (i <= 0) goto err;
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if (rsa_pad_mode == RSA_X931_PADDING)
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{
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int hash_id;
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if (i != (int)(diglen + 1))
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
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goto err;
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}
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hash_id = RSA_X931_hash_id(md_type);
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if (hash_id == -1)
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
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goto err;
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}
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if (s[diglen] != (unsigned char)hash_id)
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
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goto err;
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}
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if (memcmp(s, dig, diglen))
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
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goto err;
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}
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ret = 1;
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}
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else if (rsa_pad_mode == RSA_PKCS1_PADDING)
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{
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der = fips_digestinfo_encoding(md_type, &dlen);
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if (!der)
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
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return(0);
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}
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/* Compare, DigestInfo length, DigestInfo header and finally
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* digest value itself
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*/
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/* If length mismatch try alternate encoding */
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if (i != (int)(dlen + diglen))
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der = fips_digestinfo_nn_encoding(md_type, &dlen);
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if ((i != (int)(dlen + diglen)) || memcmp(der, s, dlen)
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|| memcmp(s + dlen, dig, diglen))
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{
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RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
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goto err;
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}
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ret = 1;
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}
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else if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
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{
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ret = RSA_verify_PKCS1_PSS_mgf1(rsa, dig, mhash, mgf1Hash,
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s, saltlen);
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if (ret < 0)
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ret = 0;
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}
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err:
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if (s != NULL)
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{
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OPENSSL_cleanse(s, siglen);
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OPENSSL_free(s);
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}
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return(ret);
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}
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#endif
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