[thirdparty/openssl.git] / crypto / pkcs12 / p12_key.c

/* p12_key.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 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/pkcs12.h>
#include <openssl/bn.h>

/* Uncomment out this line to get debugging info about key generation */
/*#define DEBUG_KEYGEN*/
#ifdef DEBUG_KEYGEN
#include <openssl/bio.h>
extern BIO *bio_err;
void h__dump (unsigned char *p, int len);
#endif

/* PKCS12 compatible key/IV generation */
#ifndef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#endif

int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
	     int saltlen, int id, int iter, int n, unsigned char *out,
	     const EVP_MD *md_type)
{
	int ret;
	unsigned char *unipass;
	int uniplen;

	if(!pass) {
		unipass = NULL;
		uniplen = 0;
	} else if (!asc2uni(pass, passlen, &unipass, &uniplen)) {
		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);
		return 0;
	}
	ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
						 id, iter, n, out, md_type);
	if (ret <= 0)
	    return 0;
	if(unipass) {
		OPENSSL_cleanse(unipass, uniplen);	/* Clear password from memory */
		OPENSSL_free(unipass);
	}
	return ret;
}

int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,
	     int saltlen, int id, int iter, int n, unsigned char *out,
	     const EVP_MD *md_type)
{
	unsigned char *B, *D, *I, *p, *Ai;
	int Slen, Plen, Ilen, Ijlen;
	int i, j, u, v;
	BIGNUM *Ij, *Bpl1;	/* These hold Ij and B + 1 */
	EVP_MD_CTX ctx;
#ifdef  DEBUG_KEYGEN
	unsigned char *tmpout = out;
	int tmpn = n;
#endif

#if 0
	if (!pass) {
		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
#endif

	EVP_MD_CTX_init(&ctx);
#ifdef  DEBUG_KEYGEN
	fprintf(stderr, "KEYGEN DEBUG\n");
	fprintf(stderr, "ID %d, ITER %d\n", id, iter);
	fprintf(stderr, "Password (length %d):\n", passlen);
	h__dump(pass, passlen);
	fprintf(stderr, "Salt (length %d):\n", saltlen);
	h__dump(salt, saltlen);
#endif
	v = EVP_MD_block_size (md_type);
	u = EVP_MD_size (md_type);
	if (u < 0)
	    return 0;
	D = OPENSSL_malloc (v);
	Ai = OPENSSL_malloc (u);
	B = OPENSSL_malloc (v + 1);
	Slen = v * ((saltlen+v-1)/v);
	if(passlen) Plen = v * ((passlen+v-1)/v);
	else Plen = 0;
	Ilen = Slen + Plen;
	I = OPENSSL_malloc (Ilen);
	Ij = BN_new();
	Bpl1 = BN_new();
	if (!D || !Ai || !B || !I || !Ij || !Bpl1) {
		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE);
		return 0;
	}
	for (i = 0; i < v; i++) D[i] = id;
	p = I;
	for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];
	for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];
	for (;;) {
		EVP_DigestInit_ex(&ctx, md_type, NULL);
		EVP_DigestUpdate(&ctx, D, v);
		EVP_DigestUpdate(&ctx, I, Ilen);
		EVP_DigestFinal_ex(&ctx, Ai, NULL);
		for (j = 1; j < iter; j++) {
			EVP_DigestInit_ex(&ctx, md_type, NULL);
			EVP_DigestUpdate(&ctx, Ai, u);
			EVP_DigestFinal_ex(&ctx, Ai, NULL);
		}
		memcpy (out, Ai, min (n, u));
		if (u >= n) {
			OPENSSL_free (Ai);
			OPENSSL_free (B);
			OPENSSL_free (D);
			OPENSSL_free (I);
			BN_free (Ij);
			BN_free (Bpl1);
			EVP_MD_CTX_cleanup(&ctx);
#ifdef DEBUG_KEYGEN
			fprintf(stderr, "Output KEY (length %d)\n", tmpn);
			h__dump(tmpout, tmpn);
#endif
			return 1;	
		}
		n -= u;
		out += u;
		for (j = 0; j < v; j++) B[j] = Ai[j % u];
		/* Work out B + 1 first then can use B as tmp space */
		BN_bin2bn (B, v, Bpl1);
		BN_add_word (Bpl1, 1);
		for (j = 0; j < Ilen ; j+=v) {
			BN_bin2bn (I + j, v, Ij);
			BN_add (Ij, Ij, Bpl1);
			BN_bn2bin (Ij, B);
			Ijlen = BN_num_bytes (Ij);
			/* If more than 2^(v*8) - 1 cut off MSB */
			if (Ijlen > v) {
				BN_bn2bin (Ij, B);
				memcpy (I + j, B + 1, v);
#ifndef PKCS12_BROKEN_KEYGEN
			/* If less than v bytes pad with zeroes */
			} else if (Ijlen < v) {
				memset(I + j, 0, v - Ijlen);
				BN_bn2bin(Ij, I + j + v - Ijlen); 
#endif
			} else BN_bn2bin (Ij, I + j);
		}
	}
}
#ifdef DEBUG_KEYGEN
void h__dump (unsigned char *p, int len)
{
	for (; len --; p++) fprintf(stderr, "%02X", *p);
	fprintf(stderr, "\n");	
}
#endif
Commit	Line	Data
8d8c7266	1	/* p12_key.c */
2e597528	2	/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
8d8c7266 DSH	3	* project 1999.
	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*
	53	* This product includes cryptographic software written by Eric Young
	54	* (eay@cryptsoft.com). This product includes software written by Tim
	55	* Hudson (tjh@cryptsoft.com).
	56	*
	57	*/
	58
	59	#include <stdio.h>
ee0508d4	60	#include "cryptlib.h"
ec577822	61	#include <openssl/pkcs12.h>
0f814687	62	#include <openssl/bn.h>
8d8c7266 DSH	63
	64	/* Uncomment out this line to get debugging info about key generation */
	65	/#define DEBUG_KEYGEN/
	66	#ifdef DEBUG_KEYGEN
b05eaeb5	67	#include <openssl/bio.h>
8d8c7266 DSH	68	extern BIO *bio_err;
	69	void h__dump (unsigned char *p, int len);
	70	#endif
	71
	72	/* PKCS12 compatible key/IV generation */
	73	#ifndef min
	74	#define min(a,b) ((a) < (b) ? (a) : (b))
	75	#endif
	76
a331a305	77	int PKCS12_key_gen_asc(const char pass, int passlen, unsigned char salt,
6b691a5c UM	78	int saltlen, int id, int iter, int n, unsigned char *out,
6b691a5c UM	79	const EVP_MD *md_type)
8d8c7266 DSH	80	{
	81	int ret;
	82	unsigned char *unipass;
	83	int uniplen;
0eab41fb	84
a331a305 DSH	85	if(!pass) {
	86	unipass = NULL;
	87	uniplen = 0;
6308af19	88	} else if (!asc2uni(pass, passlen, &unipass, &uniplen)) {
8d8c7266 DSH	89	PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);
	90	return 0;
	91	}
a331a305	92	ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
8d8c7266	93	id, iter, n, out, md_type);
0eab41fb BL	94	if (ret <= 0)
0eab41fb BL	95	return 0;
a331a305	96	if(unipass) {
4579924b	97	OPENSSL_cleanse(unipass, uniplen); /* Clear password from memory */
26a3a48d	98	OPENSSL_free(unipass);
a331a305	99	}
8d8c7266 DSH	100	return ret;
	101	}
	102
a331a305	103	int PKCS12_key_gen_uni(unsigned char pass, int passlen, unsigned char salt,
6b691a5c UM	104	int saltlen, int id, int iter, int n, unsigned char *out,
6b691a5c UM	105	const EVP_MD *md_type)
8d8c7266 DSH	106	{
8d8c7266 DSH	107	unsigned char B, D, I, p, *Ai;
02ee8626	108	int Slen, Plen, Ilen, Ijlen;
8d8c7266 DSH	109	int i, j, u, v;
	110	BIGNUM Ij, Bpl1; /* These hold Ij and B + 1 */
	111	EVP_MD_CTX ctx;
	112	#ifdef DEBUG_KEYGEN
	113	unsigned char *tmpout = out;
	114	int tmpn = n;
3bf7ef53 RL	115	#endif
3bf7ef53 RL	116
a331a305	117	#if 0
3bf7ef53 RL	118	if (!pass) {
	119	PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER);
	120	return 0;
	121	}
a331a305	122	#endif
3bf7ef53	123
dbad1690	124	EVP_MD_CTX_init(&ctx);
3bf7ef53	125	#ifdef DEBUG_KEYGEN
18879884 DSH	126	fprintf(stderr, "KEYGEN DEBUG\n");
	127	fprintf(stderr, "ID %d, ITER %d\n", id, iter);
	128	fprintf(stderr, "Password (length %d):\n", passlen);
	129	h__dump(pass, passlen);
	130	fprintf(stderr, "Salt (length %d):\n", saltlen);
	131	h__dump(salt, saltlen);
8d8c7266 DSH	132	#endif
	133	v = EVP_MD_block_size (md_type);
	134	u = EVP_MD_size (md_type);
0eab41fb BL	135	if (u < 0)
0eab41fb BL	136	return 0;
26a3a48d RL	137	D = OPENSSL_malloc (v);
	138	Ai = OPENSSL_malloc (u);
	139	B = OPENSSL_malloc (v + 1);
8d8c7266	140	Slen = v * ((saltlen+v-1)/v);
a331a305 DSH	141	if(passlen) Plen = v * ((passlen+v-1)/v);
a331a305 DSH	142	else Plen = 0;
8d8c7266	143	Ilen = Slen + Plen;
26a3a48d	144	I = OPENSSL_malloc (Ilen);
8d8c7266 DSH	145	Ij = BN_new();
	146	Bpl1 = BN_new();
	147	if (!D \|\| !Ai \|\| !B \|\| !I \|\| !Ij \|\| !Bpl1) {
	148	PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE);
	149	return 0;
	150	}
	151	for (i = 0; i < v; i++) D[i] = id;
	152	p = I;
	153	for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];
	154	for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];
	155	for (;;) {
20d2186c DSH	156	EVP_DigestInit_ex(&ctx, md_type, NULL);
	157	EVP_DigestUpdate(&ctx, D, v);
	158	EVP_DigestUpdate(&ctx, I, Ilen);
	159	EVP_DigestFinal_ex(&ctx, Ai, NULL);
8d8c7266	160	for (j = 1; j < iter; j++) {
20d2186c DSH	161	EVP_DigestInit_ex(&ctx, md_type, NULL);
	162	EVP_DigestUpdate(&ctx, Ai, u);
	163	EVP_DigestFinal_ex(&ctx, Ai, NULL);
8d8c7266 DSH	164	}
	165	memcpy (out, Ai, min (n, u));
	166	if (u >= n) {
26a3a48d RL	167	OPENSSL_free (Ai);
	168	OPENSSL_free (B);
	169	OPENSSL_free (D);
	170	OPENSSL_free (I);
8d8c7266 DSH	171	BN_free (Ij);
8d8c7266 DSH	172	BN_free (Bpl1);
3a3619b4	173	EVP_MD_CTX_cleanup(&ctx);
8d8c7266	174	#ifdef DEBUG_KEYGEN
18879884 DSH	175	fprintf(stderr, "Output KEY (length %d)\n", tmpn);
18879884 DSH	176	h__dump(tmpout, tmpn);
8d8c7266 DSH	177	#endif
	178	return 1;
	179	}
	180	n -= u;
	181	out += u;
	182	for (j = 0; j < v; j++) B[j] = Ai[j % u];
	183	/* Work out B + 1 first then can use B as tmp space */
	184	BN_bin2bn (B, v, Bpl1);
	185	BN_add_word (Bpl1, 1);
	186	for (j = 0; j < Ilen ; j+=v) {
	187	BN_bin2bn (I + j, v, Ij);
	188	BN_add (Ij, Ij, Bpl1);
	189	BN_bn2bin (Ij, B);
02ee8626	190	Ijlen = BN_num_bytes (Ij);
8d8c7266	191	/* If more than 2^(v8) - 1 cut off MSB /
02ee8626	192	if (Ijlen > v) {
8d8c7266 DSH	193	BN_bn2bin (Ij, B);
8d8c7266 DSH	194	memcpy (I + j, B + 1, v);
02ee8626 DSH	195	#ifndef PKCS12_BROKEN_KEYGEN
	196	/* If less than v bytes pad with zeroes */
	197	} else if (Ijlen < v) {
	198	memset(I + j, 0, v - Ijlen);
	199	BN_bn2bin(Ij, I + j + v - Ijlen);
	200	#endif
8d8c7266 DSH	201	} else BN_bn2bin (Ij, I + j);
	202	}
	203	}
8d8c7266 DSH	204	}
8d8c7266 DSH	205	#ifdef DEBUG_KEYGEN
6b691a5c	206	void h__dump (unsigned char *p, int len)
8d8c7266	207	{
18879884 DSH	208	for (; len --; p++) fprintf(stderr, "%02X", *p);
18879884 DSH	209	fprintf(stderr, "\n");
8d8c7266 DSH	210	}
8d8c7266 DSH	211	#endif