6e3bc4f073
Generalise RecipientInfo and enveloped data handling so applications can add their own key lookup routines as well as using the standard ones.
259 lines
7.5 KiB
C
259 lines
7.5 KiB
C
/* crypto/aes/aes_wrap.c */
|
|
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
|
|
* project.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 2008 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.
|
|
* ====================================================================
|
|
*/
|
|
|
|
#include "cryptlib.h"
|
|
#include <openssl/aes.h>
|
|
#include <openssl/bio.h>
|
|
|
|
static const unsigned char default_iv[] = {
|
|
0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
|
|
};
|
|
|
|
int AES_wrap_key(AES_KEY *key, const unsigned char *iv,
|
|
unsigned char *out,
|
|
const unsigned char *in, unsigned int inlen)
|
|
{
|
|
unsigned char *A, B[16], *R;
|
|
unsigned int i, j, t;
|
|
if ((inlen & 0x7) || (inlen < 8))
|
|
return -1;
|
|
A = B;
|
|
t = 1;
|
|
memcpy(out + 8, in, inlen);
|
|
if (!iv)
|
|
iv = default_iv;
|
|
|
|
memcpy(A, iv, 8);
|
|
|
|
for (j = 0; j < 6; j++)
|
|
{
|
|
R = out + 8;
|
|
for (i = 0; i < inlen; i += 8, t++, R += 8)
|
|
{
|
|
memcpy(B + 8, R, 8);
|
|
AES_encrypt(B, B, key);
|
|
A[7] ^= (unsigned char)(t & 0xff);
|
|
if (t > 0xff)
|
|
{
|
|
A[6] ^= (unsigned char)((t & 0xff) >> 8);
|
|
A[5] ^= (unsigned char)((t & 0xff) >> 16);
|
|
A[4] ^= (unsigned char)((t & 0xff) >> 24);
|
|
}
|
|
memcpy(R, B + 8, 8);
|
|
}
|
|
}
|
|
memcpy(out, A, 8);
|
|
return inlen + 8;
|
|
}
|
|
|
|
int AES_unwrap_key(AES_KEY *key, const unsigned char *iv,
|
|
unsigned char *out,
|
|
const unsigned char *in, unsigned int inlen)
|
|
{
|
|
unsigned char *A, B[16], *R;
|
|
unsigned int i, j, t;
|
|
inlen -= 8;
|
|
if (inlen & 0x7)
|
|
return -1;
|
|
if (inlen < 8)
|
|
return -1;
|
|
A = B;
|
|
t = 6 * (inlen >> 3);
|
|
memcpy(A, in, 8);
|
|
memcpy(out, in + 8, inlen);
|
|
for (j = 0; j < 6; j++)
|
|
{
|
|
R = out + inlen - 8;
|
|
for (i = 0; i < inlen; i += 8, t--, R -= 8)
|
|
{
|
|
A[7] ^= (unsigned char)(t & 0xff);
|
|
if (t > 0xff)
|
|
{
|
|
A[6] ^= (unsigned char)((t & 0xff) >> 8);
|
|
A[5] ^= (unsigned char)((t & 0xff) >> 16);
|
|
A[4] ^= (unsigned char)((t & 0xff) >> 24);
|
|
}
|
|
memcpy(B + 8, R, 8);
|
|
AES_decrypt(B, B, key);
|
|
memcpy(R, B + 8, 8);
|
|
}
|
|
}
|
|
if (!iv)
|
|
iv = default_iv;
|
|
if (memcmp(A, iv, 8))
|
|
{
|
|
OPENSSL_cleanse(out, inlen);
|
|
return 0;
|
|
}
|
|
return inlen;
|
|
}
|
|
|
|
#ifdef AES_WRAP_TEST
|
|
|
|
int AES_wrap_unwrap_test(const unsigned char *kek, int keybits,
|
|
const unsigned char *iv,
|
|
const unsigned char *eout,
|
|
const unsigned char *key, int keylen)
|
|
{
|
|
unsigned char *otmp = NULL, *ptmp = NULL;
|
|
int r, ret = 0;
|
|
AES_KEY wctx;
|
|
otmp = OPENSSL_malloc(keylen + 8);
|
|
ptmp = OPENSSL_malloc(keylen);
|
|
if (!otmp || !ptmp)
|
|
return 0;
|
|
if (AES_set_encrypt_key(kek, keybits, &wctx))
|
|
goto err;
|
|
r = AES_wrap_key(&wctx, iv, otmp, key, keylen);
|
|
if (r <= 0)
|
|
goto err;
|
|
|
|
if (eout && memcmp(eout, otmp, keylen))
|
|
goto err;
|
|
|
|
if (AES_set_decrypt_key(kek, keybits, &wctx))
|
|
goto err;
|
|
r = AES_unwrap_key(&wctx, iv, ptmp, otmp, r);
|
|
|
|
if (memcmp(key, ptmp, keylen))
|
|
goto err;
|
|
|
|
ret = 1;
|
|
|
|
err:
|
|
if (otmp)
|
|
OPENSSL_free(otmp);
|
|
if (ptmp)
|
|
OPENSSL_free(ptmp);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
|
|
static const unsigned char kek[] = {
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
|
|
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
|
|
};
|
|
|
|
static const unsigned char key[] = {
|
|
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
|
|
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
|
|
};
|
|
|
|
static const unsigned char e1[] = {
|
|
0x1f, 0xa6, 0x8b, 0x0a, 0x81, 0x12, 0xb4, 0x47,
|
|
0xae, 0xf3, 0x4b, 0xd8, 0xfb, 0x5a, 0x7b, 0x82,
|
|
0x9d, 0x3e, 0x86, 0x23, 0x71, 0xd2, 0xcf, 0xe5
|
|
};
|
|
|
|
static const unsigned char e2[] = {
|
|
0x96, 0x77, 0x8b, 0x25, 0xae, 0x6c, 0xa4, 0x35,
|
|
0xf9, 0x2b, 0x5b, 0x97, 0xc0, 0x50, 0xae, 0xd2,
|
|
0x46, 0x8a, 0xb8, 0xa1, 0x7a, 0xd8, 0x4e, 0x5d
|
|
};
|
|
|
|
static const unsigned char e3[] = {
|
|
0x64, 0xe8, 0xc3, 0xf9, 0xce, 0x0f, 0x5b, 0xa2,
|
|
0x63, 0xe9, 0x77, 0x79, 0x05, 0x81, 0x8a, 0x2a,
|
|
0x93, 0xc8, 0x19, 0x1e, 0x7d, 0x6e, 0x8a, 0xe7
|
|
};
|
|
|
|
static const unsigned char e4[] = {
|
|
0x03, 0x1d, 0x33, 0x26, 0x4e, 0x15, 0xd3, 0x32,
|
|
0x68, 0xf2, 0x4e, 0xc2, 0x60, 0x74, 0x3e, 0xdc,
|
|
0xe1, 0xc6, 0xc7, 0xdd, 0xee, 0x72, 0x5a, 0x93,
|
|
0x6b, 0xa8, 0x14, 0x91, 0x5c, 0x67, 0x62, 0xd2
|
|
};
|
|
|
|
static const unsigned char e5[] = {
|
|
0xa8, 0xf9, 0xbc, 0x16, 0x12, 0xc6, 0x8b, 0x3f,
|
|
0xf6, 0xe6, 0xf4, 0xfb, 0xe3, 0x0e, 0x71, 0xe4,
|
|
0x76, 0x9c, 0x8b, 0x80, 0xa3, 0x2c, 0xb8, 0x95,
|
|
0x8c, 0xd5, 0xd1, 0x7d, 0x6b, 0x25, 0x4d, 0xa1
|
|
};
|
|
|
|
static const unsigned char e6[] = {
|
|
0x28, 0xc9, 0xf4, 0x04, 0xc4, 0xb8, 0x10, 0xf4,
|
|
0xcb, 0xcc, 0xb3, 0x5c, 0xfb, 0x87, 0xf8, 0x26,
|
|
0x3f, 0x57, 0x86, 0xe2, 0xd8, 0x0e, 0xd3, 0x26,
|
|
0xcb, 0xc7, 0xf0, 0xe7, 0x1a, 0x99, 0xf4, 0x3b,
|
|
0xfb, 0x98, 0x8b, 0x9b, 0x7a, 0x02, 0xdd, 0x21
|
|
};
|
|
|
|
AES_KEY wctx, xctx;
|
|
int ret;
|
|
ret = AES_wrap_unwrap_test(kek, 128, NULL, e1, key, 16);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
ret = AES_wrap_unwrap_test(kek, 192, NULL, e2, key, 16);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
ret = AES_wrap_unwrap_test(kek, 256, NULL, e3, key, 16);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
ret = AES_wrap_unwrap_test(kek, 192, NULL, e4, key, 24);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
ret = AES_wrap_unwrap_test(kek, 256, NULL, e5, key, 24);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
ret = AES_wrap_unwrap_test(kek, 256, NULL, e6, key, 32);
|
|
fprintf(stderr, "Key test result %d\n", ret);
|
|
}
|
|
|
|
|
|
#endif
|