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