diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2013-07-17 14:05:19 +0100 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 2013-10-01 14:01:17 +0100 |
commit | c6f338657758d5f83c25912bed94ab4fd5058168 (patch) | |
tree | f83ac90f8af6bc5b872939e4042b2dd631384189 /crypto/modes | |
parent | cf65a07256c420e58dfbfe22bd6ba47ba955113d (diff) |
EVP support for wrapping algorithms.
Add support for key wrap algorithms via EVP interface.
Generalise AES wrap algorithm and add to modes, making existing
AES wrap algorithm a special case.
Move test code to evptests.txt
(cherry picked from commit 97cf1f6c2854a3a955fd7dd3a1f113deba00c9ef)
Conflicts:
CHANGES
Diffstat (limited to 'crypto/modes')
-rw-r--r-- | crypto/modes/Makefile | 4 | ||||
-rw-r--r-- | crypto/modes/modes.h | 8 | ||||
-rw-r--r-- | crypto/modes/wrap128.c | 140 |
3 files changed, 150 insertions, 2 deletions
diff --git a/crypto/modes/Makefile b/crypto/modes/Makefile index fde2ac1c97..ffbf019d18 100644 --- a/crypto/modes/Makefile +++ b/crypto/modes/Makefile @@ -22,9 +22,9 @@ APPS= LIB=$(TOP)/libcrypto.a LIBSRC= cbc128.c ctr128.c cts128.c cfb128.c ofb128.c gcm128.c \ - ccm128.c xts128.c + ccm128.c xts128.c wrap128.c LIBOBJ= cbc128.o ctr128.o cts128.o cfb128.o ofb128.o gcm128.o \ - ccm128.o xts128.o $(MODES_ASM_OBJ) + ccm128.o xts128.o wrap128.o $(MODES_ASM_OBJ) SRC= $(LIBSRC) diff --git a/crypto/modes/modes.h b/crypto/modes/modes.h index f18215bb2b..9912550a21 100644 --- a/crypto/modes/modes.h +++ b/crypto/modes/modes.h @@ -133,3 +133,11 @@ typedef struct xts128_context XTS128_CONTEXT; int CRYPTO_xts128_encrypt(const XTS128_CONTEXT *ctx, const unsigned char iv[16], const unsigned char *inp, unsigned char *out, size_t len, int enc); + +size_t CRYPTO_128_wrap(void *key, const unsigned char *iv, + unsigned char *out, + const unsigned char *in, size_t inlen, block128_f block); + +size_t CRYPTO_128_unwrap(void *key, const unsigned char *iv, + unsigned char *out, + const unsigned char *in, size_t inlen, block128_f block); diff --git a/crypto/modes/wrap128.c b/crypto/modes/wrap128.c new file mode 100644 index 0000000000..18785320f2 --- /dev/null +++ b/crypto/modes/wrap128.c @@ -0,0 +1,140 @@ +/* crypto/modes/wrap128.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 2013 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/modes.h> + +static const unsigned char default_iv[] = { + 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, +}; +/* Input size limit: lower than maximum of standards but far larger than + * anything that will be used in practice. + */ +#define CRYPTO128_WRAP_MAX (1UL << 31) + +size_t CRYPTO_128_wrap(void *key, const unsigned char *iv, + unsigned char *out, + const unsigned char *in, size_t inlen, block128_f block) + { + unsigned char *A, B[16], *R; + size_t i, j, t; + if ((inlen & 0x7) || (inlen < 8) || (inlen > CRYPTO128_WRAP_MAX)) + return 0; + 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); + block(B, B, key); + A[7] ^= (unsigned char)(t & 0xff); + if (t > 0xff) + { + A[6] ^= (unsigned char)((t >> 8) & 0xff); + A[5] ^= (unsigned char)((t >> 16) & 0xff); + A[4] ^= (unsigned char)((t >> 24) & 0xff); + } + memcpy(R, B + 8, 8); + } + } + memcpy(out, A, 8); + return inlen + 8; + } + +size_t CRYPTO_128_unwrap(void *key, const unsigned char *iv, + unsigned char *out, + const unsigned char *in, size_t inlen, block128_f block) + { + unsigned char *A, B[16], *R; + size_t i, j, t; + inlen -= 8; + if ((inlen & 0x7) || (inlen < 8) || (inlen > CRYPTO128_WRAP_MAX)) + return 0; + 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 >> 8) & 0xff); + A[5] ^= (unsigned char)((t >> 16) & 0xff); + A[4] ^= (unsigned char)((t >> 24) & 0xff); + } + memcpy(B + 8, R, 8); + block(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; + } |