mirror of https://github.com/openssl/openssl.git
Add pss/x931 files.
This commit is contained in:
Dr. Stephen Henson
parent
499fca2db3
commit
429168e7ee
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@ -0,0 +1,220 @@
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/* rsa_pss.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2005.
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*/
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/* ====================================================================
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* Copyright (c) 2005 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 <stdio.h>
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#include "cryptlib.h"
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/rand.h>
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#include <openssl/sha.h>
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const static unsigned char zeroes[] = {0,0,0,0,0,0,0,0};
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int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,
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const EVP_MD *Hash, const unsigned char *EM, int sLen)
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{
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int i;
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int ret = 0;
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int hLen, maskedDBLen, emBits, emLen;
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const unsigned char *H;
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unsigned char *DB = NULL;
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EVP_MD_CTX ctx;
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unsigned char H_[EVP_MAX_MD_SIZE];
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emBits = BN_num_bits(rsa->n) - 1;
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emLen = (emBits + 7) >> 3;
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hLen = EVP_MD_size(Hash);
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if (emLen < (hLen + sLen + 2))
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_DATA_TOO_LARGE);
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goto err;
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}
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if (EM[emLen - 1] != 0xbc)
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_LAST_OCTET_INVALID);
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goto err;
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}
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if (EM[0] & (0xFF << (emBits & 0x7)))
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_FIRST_OCTET_INVALID);
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goto err;
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}
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maskedDBLen = emLen - hLen - 1;
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H = EM + maskedDBLen;
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DB = OPENSSL_malloc(maskedDBLen);
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if (!DB)
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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PKCS1_MGF1(DB, maskedDBLen, H, hLen, Hash);
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for (i = 0; i < maskedDBLen; i++)
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DB[i] ^= EM[i];
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DB[0] &= 0xFF >> (8 - (emBits & 0x7));
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for (i = 0; i < (emLen - hLen - sLen - 2); i++)
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{
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if (DB[i] != 0)
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS,
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RSA_R_ZERO_CHECK_FAILED);
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goto err;
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}
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}
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if (DB[i] != 0x1)
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_ONE_CHECK_FAILED);
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goto err;
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}
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EVP_MD_CTX_init(&ctx);
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EVP_DigestInit_ex(&ctx, Hash, NULL);
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EVP_DigestUpdate(&ctx, zeroes, sizeof zeroes);
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EVP_DigestUpdate(&ctx, mHash, hLen);
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if (sLen)
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EVP_DigestUpdate(&ctx, DB + maskedDBLen - sLen, sLen);
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EVP_DigestFinal(&ctx, H_, NULL);
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EVP_MD_CTX_cleanup(&ctx);
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if (memcmp(H_, H, hLen))
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{
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RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_BAD_SIGNATURE);
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ret = 0;
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}
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else
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ret = 1;
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err:
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if (DB)
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OPENSSL_free(DB);
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return ret;
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}
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int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,
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const unsigned char *mHash,
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const EVP_MD *Hash, int sLen)
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{
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int i;
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int ret = 0;
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int hLen, maskedDBLen, emBits, emLen;
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unsigned char *H, *salt = NULL, *p;
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EVP_MD_CTX ctx;
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emBits = BN_num_bits(rsa->n) - 1;
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emLen = (emBits + 7) >> 3;
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hLen = EVP_MD_size(Hash);
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if (sLen < 0)
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sLen = 0;
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if (emLen < (hLen + sLen + 2))
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{
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RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_PSS,
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RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
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goto err;
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}
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if (sLen > 0)
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{
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salt = OPENSSL_malloc(sLen);
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if (!salt)
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{
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RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_PSS,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!RAND_bytes(salt, sLen))
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goto err;
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}
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maskedDBLen = emLen - hLen - 1;
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H = EM + maskedDBLen;
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EVP_MD_CTX_init(&ctx);
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EVP_DigestInit_ex(&ctx, Hash, NULL);
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EVP_DigestUpdate(&ctx, zeroes, sizeof zeroes);
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EVP_DigestUpdate(&ctx, mHash, hLen);
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if (sLen)
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EVP_DigestUpdate(&ctx, salt, sLen);
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EVP_DigestFinal(&ctx, H, NULL);
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EVP_MD_CTX_cleanup(&ctx);
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/* Generate dbMask in place then perform XOR on it */
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PKCS1_MGF1(EM, maskedDBLen, H, hLen, Hash);
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p = EM;
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/* Initial PS XORs with all zeroes which is a NOP so just update
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* pointer. Note from a test above this value is guaranteed to
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* be non-negative.
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*/
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p += emLen - sLen - hLen - 2;
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*p++ ^= 0x1;
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if (sLen > 0)
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{
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for (i = 0; i < sLen; i++)
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*p++ ^= salt[i];
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}
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EM[0] &= 0xFF >> (8 - (emBits & 0x7));
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/* H is already in place so just set final 0xbc */
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EM[emLen - 1] = 0xbc;
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ret = 1;
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err:
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if (salt)
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OPENSSL_free(salt);
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return ret;
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}
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@ -0,0 +1,175 @@
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/* rsa_x931.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2005.
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*/
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/* ====================================================================
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* Copyright (c) 2005 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,
|
||||
* 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 <stdio.h>
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#include "cryptlib.h"
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <openssl/rand.h>
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#include <openssl/objects.h>
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int RSA_padding_add_X931(unsigned char *to, int tlen,
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const unsigned char *from, int flen)
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{
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int j;
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unsigned char *p;
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/* Absolute minimum amount of padding is 1 header nibble, 1 padding
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* nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
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*/
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j = tlen - flen - 2;
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if (j < 0)
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{
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RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
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return -1;
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}
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p=(unsigned char *)to;
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/* If no padding start and end nibbles are in one byte */
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if (j == 0)
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*p++ = 0x6A;
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else
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{
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*p++ = 0x6B;
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if (j > 1)
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{
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memset(p, 0xBB, j - 1);
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p += j - 1;
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}
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*p++ = 0xBA;
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}
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memcpy(p,from,(unsigned int)flen);
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p += flen;
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*p = 0xCC;
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return(1);
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}
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int RSA_padding_check_X931(unsigned char *to, int tlen,
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const unsigned char *from, int flen, int num)
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{
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int i,j;
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const unsigned char *p;
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p=from;
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if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B)))
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{
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RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER);
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return -1;
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}
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j=flen-3;
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if (*p++ == 0x6B)
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{
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for (i = 0; i < j; i++)
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{
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unsigned char c = *p++;
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if (c == 0xBA)
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break;
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if (c != 0xBB)
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{
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RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
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RSA_R_INVALID_PADDING);
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return -1;
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}
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}
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}
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j -= i;
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if (i == 0)
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{
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RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
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return -1;
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}
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if (p[j] != 0xCC)
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{
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RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
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return -1;
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}
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memcpy(to,p,(unsigned int)j);
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return(j);
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}
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/* Translate between X931 hash ids and NIDs */
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int RSA_X931_hash_id(int nid)
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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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return 0x33;
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case NID_sha256:
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return 0x34;
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case NID_sha384:
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return 0x36;
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case NID_sha512:
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return 0x35;
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}
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return -1;
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}
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