239 lines
7.6 KiB
C
239 lines
7.6 KiB
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 (!OPENSSL_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;
|
|
int ret = 0;
|
|
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)
|
|
goto err;
|
|
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 (;;) {
|
|
if (!EVP_DigestInit_ex(&ctx, md_type, NULL)
|
|
|| !EVP_DigestUpdate(&ctx, D, v)
|
|
|| !EVP_DigestUpdate(&ctx, I, Ilen)
|
|
|| !EVP_DigestFinal_ex(&ctx, Ai, NULL))
|
|
goto err;
|
|
for (j = 1; j < iter; j++) {
|
|
if (!EVP_DigestInit_ex(&ctx, md_type, NULL)
|
|
|| !EVP_DigestUpdate(&ctx, Ai, u)
|
|
|| !EVP_DigestFinal_ex(&ctx, Ai, NULL))
|
|
goto err;
|
|
}
|
|
memcpy(out, Ai, min(n, u));
|
|
if (u >= n) {
|
|
#ifdef DEBUG_KEYGEN
|
|
fprintf(stderr, "Output KEY (length %d)\n", tmpn);
|
|
h__dump(tmpout, tmpn);
|
|
#endif
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
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 */
|
|
if (!BN_bin2bn(B, v, Bpl1))
|
|
goto err;
|
|
if (!BN_add_word(Bpl1, 1))
|
|
goto err;
|
|
for (j = 0; j < Ilen; j += v) {
|
|
if (!BN_bin2bn(I + j, v, Ij))
|
|
goto err;
|
|
if (!BN_add(Ij, Ij, Bpl1))
|
|
goto err;
|
|
if (!BN_bn2bin(Ij, B))
|
|
goto err;
|
|
Ijlen = BN_num_bytes(Ij);
|
|
/* If more than 2^(v*8) - 1 cut off MSB */
|
|
if (Ijlen > v) {
|
|
if (!BN_bn2bin(Ij, B))
|
|
goto err;
|
|
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);
|
|
if (!BN_bn2bin(Ij, I + j + v - Ijlen))
|
|
goto err;
|
|
#endif
|
|
} else if (!BN_bn2bin(Ij, I + j))
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
err:
|
|
PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_MALLOC_FAILURE);
|
|
|
|
end:
|
|
OPENSSL_free(Ai);
|
|
OPENSSL_free(B);
|
|
OPENSSL_free(D);
|
|
OPENSSL_free(I);
|
|
BN_free(Ij);
|
|
BN_free(Bpl1);
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef DEBUG_KEYGEN
|
|
void h__dump(unsigned char *p, int len)
|
|
{
|
|
for (; len--; p++)
|
|
fprintf(stderr, "%02X", *p);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
#endif
|