Add pss/x931 files.

crypto/rsa/rsa_pss.c

+/* rsa_pss.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+#include <openssl/sha.h>
+
+const static unsigned char zeroes[] = {0,0,0,0,0,0,0,0};
+
+int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,
+			const EVP_MD *Hash, const unsigned char *EM, int sLen)
+	{
+	int i;
+	int ret = 0;
+	int hLen, maskedDBLen, emBits, emLen;
+	const unsigned char *H;
+	unsigned char *DB = NULL;
+	EVP_MD_CTX ctx;
+	unsigned char H_[EVP_MAX_MD_SIZE];
+	emBits = BN_num_bits(rsa->n) - 1;
+	emLen = (emBits + 7) >> 3;
+	hLen = EVP_MD_size(Hash);
+	if (emLen < (hLen + sLen + 2))
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_DATA_TOO_LARGE);
+		goto err;
+		}
+	if (EM[emLen - 1] != 0xbc)
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_LAST_OCTET_INVALID);
+		goto err;
+		}
+	if (EM[0] & (0xFF << (emBits & 0x7)))
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_FIRST_OCTET_INVALID);
+		goto err;
+		}
+	maskedDBLen = emLen - hLen - 1;
+	H = EM + maskedDBLen;
+	DB = OPENSSL_malloc(maskedDBLen);
+	if (!DB)
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+	PKCS1_MGF1(DB, maskedDBLen, H, hLen, Hash);
+	for (i = 0; i < maskedDBLen; i++)
+		DB[i] ^= EM[i];
+	DB[0] &= 0xFF >> (8 - (emBits & 0x7));
+	for (i = 0; i < (emLen - hLen - sLen - 2); i++)
+		{
+		if (DB[i] != 0)	
+			{
+			RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS,
+						RSA_R_ZERO_CHECK_FAILED);
+			goto err;
+			}
+		}
+	if (DB[i] != 0x1)
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_ONE_CHECK_FAILED);
+		goto err;
+		}
+	EVP_MD_CTX_init(&ctx);
+	EVP_DigestInit_ex(&ctx, Hash, NULL);
+	EVP_DigestUpdate(&ctx, zeroes, sizeof zeroes);
+	EVP_DigestUpdate(&ctx, mHash, hLen);
+	if (sLen)
+		EVP_DigestUpdate(&ctx, DB + maskedDBLen - sLen, sLen);
+	EVP_DigestFinal(&ctx, H_, NULL);
+	EVP_MD_CTX_cleanup(&ctx);
+	if (memcmp(H_, H, hLen))
+		{
+		RSAerr(RSA_F_RSA_VERIFY_PKCS1_PSS, RSA_R_BAD_SIGNATURE);
+		ret = 0;
+		}
+	else 
+		ret = 1;
+
+	err:
+	if (DB)
+		OPENSSL_free(DB);
+
+	return ret;
+
+	}
+
+int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,
+			const unsigned char *mHash,
+			const EVP_MD *Hash, int sLen)
+	{
+	int i;
+	int ret = 0;
+	int hLen, maskedDBLen, emBits, emLen;
+	unsigned char *H, *salt = NULL, *p;
+	EVP_MD_CTX ctx;
+	emBits = BN_num_bits(rsa->n) - 1;
+	emLen = (emBits + 7) >> 3;
+	hLen = EVP_MD_size(Hash);
+	if (sLen < 0)
+		sLen = 0;
+	if (emLen < (hLen + sLen + 2))
+		{
+		RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_PSS,
+		   RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+		goto err;
+		}
+	if (sLen > 0)
+		{
+		salt = OPENSSL_malloc(sLen);
+		if (!salt)
+			{
+			RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_PSS,
+		   		ERR_R_MALLOC_FAILURE);
+			goto err;
+			}
+		if (!RAND_bytes(salt, sLen))
+			goto err;
+		}
+	maskedDBLen = emLen - hLen - 1;
+	H = EM + maskedDBLen;
+	EVP_MD_CTX_init(&ctx);
+	EVP_DigestInit_ex(&ctx, Hash, NULL);
+	EVP_DigestUpdate(&ctx, zeroes, sizeof zeroes);
+	EVP_DigestUpdate(&ctx, mHash, hLen);
+	if (sLen)
+		EVP_DigestUpdate(&ctx, salt, sLen);
+	EVP_DigestFinal(&ctx, H, NULL);
+	EVP_MD_CTX_cleanup(&ctx);
+
+	/* Generate dbMask in place then perform XOR on it */
+	PKCS1_MGF1(EM, maskedDBLen, H, hLen, Hash);
+
+	p = EM;
+
+	/* Initial PS XORs with all zeroes which is a NOP so just update
+	 * pointer. Note from a test above this value is guaranteed to
+	 * be non-negative.
+	 */
+	p += emLen - sLen - hLen - 2;
+	*p++ ^= 0x1;
+	if (sLen > 0)
+		{
+		for (i = 0; i < sLen; i++)
+			*p++ ^= salt[i];
+		}
+	EM[0] &= 0xFF >> (8 - (emBits & 0x7));
+
+	/* H is already in place so just set final 0xbc */
+
+	EM[emLen - 1] = 0xbc;
+
+	ret = 1;
+
+	err:
+	if (salt)
+		OPENSSL_free(salt);
+
+	return ret;
+
+	}

crypto/rsa/rsa_x931.c

+/* rsa_x931.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+
+int RSA_padding_add_X931(unsigned char *to, int tlen,
+	     const unsigned char *from, int flen)
+	{
+	int j;
+	unsigned char *p;
+
+	/* Absolute minimum amount of padding is 1 header nibble, 1 padding
+	 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
+	 */
+
+	j = tlen - flen - 2;
+
+	if (j < 0)
+		{
+		RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+		return -1;
+		}
+	
+	p=(unsigned char *)to;
+
+	/* If no padding start and end nibbles are in one byte */
+	if (j == 0)
+		*p++ = 0x6A;
+	else
+		{
+		*p++ = 0x6B;
+		if (j > 1)
+			{
+			memset(p, 0xBB, j - 1);
+			p += j - 1;
+			}
+		*p++ = 0xBA;
+		}
+	memcpy(p,from,(unsigned int)flen);
+	p += flen;
+	*p = 0xCC;
+	return(1);
+	}
+
+int RSA_padding_check_X931(unsigned char *to, int tlen,
+	     const unsigned char *from, int flen, int num)
+	{
+	int i,j;
+	const unsigned char *p;
+
+	p=from;
+	if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B)))
+		{
+		RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER);
+		return -1;
+		}
+
+	j=flen-3;
+	if (*p++ == 0x6B)
+		{
+		for (i = 0; i < j; i++)
+			{
+			unsigned char c = *p++;
+			if (c == 0xBA)
+				break;
+			if (c != 0xBB)
+				{
+				RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
+					RSA_R_INVALID_PADDING);
+				return -1;
+				}
+			}
+		}
+
+	j -= i;
+
+	if (i == 0)
+		{
+		RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
+		return -1;
+		}
+
+	if (p[j] != 0xCC)
+		{
+		RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
+		return -1;
+		}
+
+	memcpy(to,p,(unsigned int)j);
+
+	return(j);
+	}
+
+/* Translate between X931 hash ids and NIDs */
+
+int RSA_X931_hash_id(int nid)
+	{
+	switch (nid)
+		{
+		case NID_sha1:
+		return 0x33;
+
+		case NID_sha256:
+		return 0x34;
+
+		case NID_sha384:
+		return 0x36;
+
+		case NID_sha512:
+		return 0x35;
+
+		}
+	return -1;
+	}
+