-/* 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.
- * ====================================================================
+/*
+ * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#include "cryptlib.h"
+#include "internal/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];
+ unsigned long data[N_WORDS];
} aes_block_t;
-// XXX: probably some better way to do this
+/* XXX: probably some better way to do this */
#if defined(__i386__) || defined(__x86_64__)
-#define UNALIGNED_MEMOPS_ARE_FAST 1
+# define UNALIGNED_MEMOPS_ARE_FAST 1
+#else
+# define UNALIGNED_MEMOPS_ARE_FAST 0
#endif
-#ifdef 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)
+#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)
+# 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,
- const unsigned long length, const AES_KEY *key,
- unsigned char *ivec, const int enc)
- {
- unsigned long n;
- unsigned long len;
+ size_t length, const AES_KEY *key,
+ unsigned char *ivec, const int enc)
+{
+ size_t n;
+ size_t len = length;
+
+ if (length == 0)
+ return;
- OPENSSL_assert(in && out && key && ivec);
- OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
- OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
+ 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;
+ len = length / AES_BLOCK_SIZE;
- if (AES_ENCRYPT == enc)
- {
- if (in != out)
- {
- aes_block_t *ivp = (aes_block_t *)ivec;
- aes_block_t *iv2p = (aes_block_t *)(ivec + 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;
+ 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;
+ 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);
+ 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)
- {
- aes_block_t *ivp = (aes_block_t *)ivec;
- aes_block_t *iv2p = (aes_block_t *)(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;
+ 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;
+ 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);
+ 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);
- }
- }
- }
+ 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
/* 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,
- const unsigned long length, const AES_KEY *key,
- const AES_KEY *key2, const unsigned char *ivec,
- const int enc)
- {
- unsigned long n;
- unsigned long 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;
+ 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);
+ 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) */
+ 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;
- }
+ /* 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 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;
- }
- }
- }
+ /* 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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