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Diffstat (limited to 'openssl/crypto/aes/aes_ige.c')
-rw-r--r--openssl/crypto/aes/aes_ige.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/openssl/crypto/aes/aes_ige.c b/openssl/crypto/aes/aes_ige.c
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index c161351e..00000000
--- a/openssl/crypto/aes/aes_ige.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/* crypto/aes/aes_ige.c -*- mode:C; c-file-style: "eay" -*- */
-/* ====================================================================
- * Copyright (c) 2006 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
- * openssl-core@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 "aes_locl.h"
-
-#define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long))
-typedef struct {
- unsigned long data[N_WORDS];
-} aes_block_t;
-
-/* XXX: probably some better way to do this */
-#if defined(__i386__) || defined(__x86_64__)
-#define UNALIGNED_MEMOPS_ARE_FAST 1
-#else
-#define UNALIGNED_MEMOPS_ARE_FAST 0
-#endif
-
-#if UNALIGNED_MEMOPS_ARE_FAST
-#define load_block(d, s) (d) = *(const aes_block_t *)(s)
-#define store_block(d, s) *(aes_block_t *)(d) = (s)
-#else
-#define load_block(d, s) memcpy((d).data, (s), AES_BLOCK_SIZE)
-#define store_block(d, s) memcpy((d), (s).data, AES_BLOCK_SIZE)
-#endif
-
-/* N.B. The IV for this mode is _twice_ the block size */
-
-void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
- size_t length, const AES_KEY *key,
- unsigned char *ivec, const int enc)
- {
- size_t n;
- size_t len = length;
-
- OPENSSL_assert(in && out && key && ivec);
- OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
- OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
-
- len = length / AES_BLOCK_SIZE;
-
- if (AES_ENCRYPT == enc)
- {
- if (in != out &&
- (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0))
- {
- aes_block_t *ivp = (aes_block_t *)ivec;
- aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
-
- while (len)
- {
- aes_block_t *inp = (aes_block_t *)in;
- aes_block_t *outp = (aes_block_t *)out;
-
- for(n=0 ; n < N_WORDS; ++n)
- outp->data[n] = inp->data[n] ^ ivp->data[n];
- AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key);
- for(n=0 ; n < N_WORDS; ++n)
- outp->data[n] ^= iv2p->data[n];
- ivp = outp;
- iv2p = inp;
- --len;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
- memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
- }
- else
- {
- aes_block_t tmp, tmp2;
- aes_block_t iv;
- aes_block_t iv2;
-
- load_block(iv, ivec);
- load_block(iv2, ivec + AES_BLOCK_SIZE);
-
- while (len)
- {
- load_block(tmp, in);
- for(n=0 ; n < N_WORDS; ++n)
- tmp2.data[n] = tmp.data[n] ^ iv.data[n];
- AES_encrypt((unsigned char *)tmp2.data, (unsigned char *)tmp2.data, key);
- for(n=0 ; n < N_WORDS; ++n)
- tmp2.data[n] ^= iv2.data[n];
- store_block(out, tmp2);
- iv = tmp2;
- iv2 = tmp;
- --len;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- memcpy(ivec, iv.data, AES_BLOCK_SIZE);
- memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
- }
- }
- else
- {
- if (in != out &&
- (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0))
- {
- aes_block_t *ivp = (aes_block_t *)ivec;
- aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
-
- while (len)
- {
- aes_block_t tmp;
- aes_block_t *inp = (aes_block_t *)in;
- aes_block_t *outp = (aes_block_t *)out;
-
- for(n=0 ; n < N_WORDS; ++n)
- tmp.data[n] = inp->data[n] ^ iv2p->data[n];
- AES_decrypt((unsigned char *)tmp.data, (unsigned char *)outp->data, key);
- for(n=0 ; n < N_WORDS; ++n)
- outp->data[n] ^= ivp->data[n];
- ivp = inp;
- iv2p = outp;
- --len;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
- memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
- }
- else
- {
- aes_block_t tmp, tmp2;
- aes_block_t iv;
- aes_block_t iv2;
-
- load_block(iv, ivec);
- load_block(iv2, ivec + AES_BLOCK_SIZE);
-
- while (len)
- {
- load_block(tmp, in);
- tmp2 = tmp;
- for(n=0 ; n < N_WORDS; ++n)
- tmp.data[n] ^= iv2.data[n];
- AES_decrypt((unsigned char *)tmp.data, (unsigned char *)tmp.data, key);
- for(n=0 ; n < N_WORDS; ++n)
- tmp.data[n] ^= iv.data[n];
- store_block(out, tmp);
- iv = tmp2;
- iv2 = tmp;
- --len;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- memcpy(ivec, iv.data, AES_BLOCK_SIZE);
- memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
- }
- }
- }
-
-/*
- * Note that its effectively impossible to do biIGE in anything other
- * than a single pass, so no provision is made for chaining.
- */
-
-/* N.B. The IV for this mode is _four times_ the block size */
-
-void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
- size_t length, const AES_KEY *key,
- const AES_KEY *key2, const unsigned char *ivec,
- const int enc)
- {
- size_t n;
- size_t len = length;
- unsigned char tmp[AES_BLOCK_SIZE];
- unsigned char tmp2[AES_BLOCK_SIZE];
- unsigned char tmp3[AES_BLOCK_SIZE];
- unsigned char prev[AES_BLOCK_SIZE];
- const unsigned char *iv;
- const unsigned char *iv2;
-
- OPENSSL_assert(in && out && key && ivec);
- OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
- OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
-
- if (AES_ENCRYPT == enc)
- {
- /* XXX: Do a separate case for when in != out (strictly should
- check for overlap, too) */
-
- /* First the forward pass */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- while (len >= AES_BLOCK_SIZE)
- {
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] = in[n] ^ iv[n];
- AES_encrypt(out, out, key);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] ^= iv2[n];
- iv = out;
- memcpy(prev, in, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
-
- /* And now backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- len = length;
- while(len >= AES_BLOCK_SIZE)
- {
- out -= AES_BLOCK_SIZE;
- /* XXX: reduce copies by alternating between buffers */
- memcpy(tmp, out, AES_BLOCK_SIZE);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] ^= iv[n];
- /* hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); */
- AES_encrypt(out, out, key);
- /* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
- /* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] ^= iv2[n];
- /* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
- iv = out;
- memcpy(prev, tmp, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- }
- }
- else
- {
- /* First backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- in += length;
- out += length;
- while (len >= AES_BLOCK_SIZE)
- {
- in -= AES_BLOCK_SIZE;
- out -= AES_BLOCK_SIZE;
- memcpy(tmp, in, AES_BLOCK_SIZE);
- memcpy(tmp2, in, AES_BLOCK_SIZE);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- }
-
- /* And now forwards */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- len = length;
- while (len >= AES_BLOCK_SIZE)
- {
- memcpy(tmp, out, AES_BLOCK_SIZE);
- memcpy(tmp2, out, AES_BLOCK_SIZE);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- }
- }
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