diff options
Diffstat (limited to 'openssl/crypto/aes/aes_wrap.c')
| -rw-r--r-- | openssl/crypto/aes/aes_wrap.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/openssl/crypto/aes/aes_wrap.c b/openssl/crypto/aes/aes_wrap.c new file mode 100644 index 000000000..9feacd65d --- /dev/null +++ b/openssl/crypto/aes/aes_wrap.c @@ -0,0 +1,259 @@ +/* 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 |