555 lines
14 KiB
C
555 lines
14 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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#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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static int fips_rsa_sign(int type, const unsigned char *x, unsigned int y,
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unsigned char *sigret, unsigned int *siglen, EVP_MD_SVCTX *sv)
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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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int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
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int rsa_pad_mode = 0;
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RSA *rsa = sv->key;
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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(sv->mctx, md, &m_len);
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if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
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{
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ret = rsa->meth->rsa_sign(type, md, m_len,
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sigret, siglen, rsa);
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goto done;
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}
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if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
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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(M_EVP_MD_CTX_type(sv->mctx));
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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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rsa_pad_mode = RSA_X931_PADDING;
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}
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else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
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{
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der = fips_digestinfo_encoding(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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rsa_pad_mode = RSA_PKCS1_PADDING;
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}
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else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
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{
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unsigned char *sbuf;
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int saltlen;
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i = RSA_size(rsa);
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sbuf = OPENSSL_malloc(RSA_size(rsa));
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saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
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if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
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saltlen = -1;
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else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
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saltlen = -2;
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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(rsa, sbuf, md,
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M_EVP_MD_CTX_md(sv->mctx), 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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static int fips_rsa_verify(int dtype,
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const unsigned char *x, unsigned int y,
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unsigned char *sigbuf, unsigned int siglen, EVP_MD_SVCTX *sv)
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{
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int i,ret=0;
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unsigned int dlen, diglen;
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int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
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int rsa_pad_mode = 0;
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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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RSA *rsa = sv->key;
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if (siglen != (unsigned int)RSA_size(sv->key))
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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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EVP_DigestFinal_ex(sv->mctx, dig, &diglen);
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if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
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{
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return rsa->meth->rsa_verify(dtype, dig, diglen,
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sigbuf, siglen, rsa);
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}
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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 (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
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rsa_pad_mode = RSA_X931_PADDING;
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else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
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rsa_pad_mode = RSA_PKCS1_PADDING;
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else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
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rsa_pad_mode = RSA_NO_PADDING;
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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_pad_mode);
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if (i <= 0) goto err;
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if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
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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(M_EVP_MD_CTX_type(sv->mctx));
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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 (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
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{
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der = fips_digestinfo_encoding(dtype, &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(dtype, &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 (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
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{
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int saltlen;
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saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
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if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
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saltlen = -1;
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else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
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saltlen = -2;
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ret = RSA_verify_PKCS1_PSS(rsa, dig, M_EVP_MD_CTX_md(sv->mctx),
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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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#define EVP_PKEY_RSA_fips_method \
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(evp_sign_method *)fips_rsa_sign, \
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(evp_verify_method *)fips_rsa_verify, \
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{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}
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static int init(EVP_MD_CTX *ctx)
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{ return SHA1_Init(ctx->md_data); }
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static int update(EVP_MD_CTX *ctx,const void *data,size_t count)
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{ return SHA1_Update(ctx->md_data,data,count); }
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static int final(EVP_MD_CTX *ctx,unsigned char *md)
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{ return SHA1_Final(md,ctx->md_data); }
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static const EVP_MD sha1_md=
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{
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NID_sha1,
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NID_sha1WithRSAEncryption,
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SHA_DIGEST_LENGTH,
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EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
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init,
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update,
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final,
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NULL,
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NULL,
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EVP_PKEY_RSA_fips_method,
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SHA_CBLOCK,
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sizeof(EVP_MD *)+sizeof(SHA_CTX),
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};
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const EVP_MD *EVP_sha1(void)
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{
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return(&sha1_md);
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}
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static int init224(EVP_MD_CTX *ctx)
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{ return SHA224_Init(ctx->md_data); }
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static int init256(EVP_MD_CTX *ctx)
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{ return SHA256_Init(ctx->md_data); }
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/*
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* Even though there're separate SHA224_[Update|Final], we call
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* SHA256 functions even in SHA224 context. This is what happens
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* there anyway, so we can spare few CPU cycles:-)
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*/
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static int update256(EVP_MD_CTX *ctx,const void *data,size_t count)
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{ return SHA256_Update(ctx->md_data,data,count); }
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static int final256(EVP_MD_CTX *ctx,unsigned char *md)
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{ return SHA256_Final(md,ctx->md_data); }
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static const EVP_MD sha224_md=
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{
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NID_sha224,
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NID_sha224WithRSAEncryption,
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SHA224_DIGEST_LENGTH,
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EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
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init224,
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update256,
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final256,
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NULL,
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|
NULL,
|
|
EVP_PKEY_RSA_fips_method,
|
|
SHA256_CBLOCK,
|
|
sizeof(EVP_MD *)+sizeof(SHA256_CTX),
|
|
};
|
|
|
|
const EVP_MD *EVP_sha224(void)
|
|
{ return(&sha224_md); }
|
|
|
|
static const EVP_MD sha256_md=
|
|
{
|
|
NID_sha256,
|
|
NID_sha256WithRSAEncryption,
|
|
SHA256_DIGEST_LENGTH,
|
|
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
|
|
init256,
|
|
update256,
|
|
final256,
|
|
NULL,
|
|
NULL,
|
|
EVP_PKEY_RSA_fips_method,
|
|
SHA256_CBLOCK,
|
|
sizeof(EVP_MD *)+sizeof(SHA256_CTX),
|
|
};
|
|
|
|
const EVP_MD *EVP_sha256(void)
|
|
{ return(&sha256_md); }
|
|
|
|
static int init384(EVP_MD_CTX *ctx)
|
|
{ return SHA384_Init(ctx->md_data); }
|
|
static int init512(EVP_MD_CTX *ctx)
|
|
{ return SHA512_Init(ctx->md_data); }
|
|
/* See comment in SHA224/256 section */
|
|
static int update512(EVP_MD_CTX *ctx,const void *data,size_t count)
|
|
{ return SHA512_Update(ctx->md_data,data,count); }
|
|
static int final512(EVP_MD_CTX *ctx,unsigned char *md)
|
|
{ return SHA512_Final(md,ctx->md_data); }
|
|
|
|
static const EVP_MD sha384_md=
|
|
{
|
|
NID_sha384,
|
|
NID_sha384WithRSAEncryption,
|
|
SHA384_DIGEST_LENGTH,
|
|
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
|
|
init384,
|
|
update512,
|
|
final512,
|
|
NULL,
|
|
NULL,
|
|
EVP_PKEY_RSA_fips_method,
|
|
SHA512_CBLOCK,
|
|
sizeof(EVP_MD *)+sizeof(SHA512_CTX),
|
|
};
|
|
|
|
const EVP_MD *EVP_sha384(void)
|
|
{ return(&sha384_md); }
|
|
|
|
static const EVP_MD sha512_md=
|
|
{
|
|
NID_sha512,
|
|
NID_sha512WithRSAEncryption,
|
|
SHA512_DIGEST_LENGTH,
|
|
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
|
|
init512,
|
|
update512,
|
|
final512,
|
|
NULL,
|
|
NULL,
|
|
EVP_PKEY_RSA_fips_method,
|
|
SHA512_CBLOCK,
|
|
sizeof(EVP_MD *)+sizeof(SHA512_CTX),
|
|
};
|
|
|
|
const EVP_MD *EVP_sha512(void)
|
|
{ return(&sha512_md); }
|
|
|
|
#endif
|