diff options
author | Parménides GV <parmegv@sdf.org> | 2014-04-09 16:03:55 +0200 |
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committer | Parménides GV <parmegv@sdf.org> | 2014-04-09 16:07:34 +0200 |
commit | 1684c8f398922065a97e7da4dac4ac6a33cc5218 (patch) | |
tree | 76a4b11ae0d7b217c088f3c2b8fc7e69a7b8ae0d /app/openssl/crypto/aes/aes_ige.c | |
parent | b9a2b085a8f508cd09e2639c70be845c992c4a3e (diff) |
Back to the standard "app" module.
This return to "app" instead of "bitmask_android" is due to this reading: https://developer.android.com/sdk/installing/studio-build.html#projectStructure
I'll have to tweak the final apk name in build.gradle.
Diffstat (limited to 'app/openssl/crypto/aes/aes_ige.c')
-rw-r--r-- | app/openssl/crypto/aes/aes_ige.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/app/openssl/crypto/aes/aes_ige.c b/app/openssl/crypto/aes/aes_ige.c new file mode 100644 index 00000000..c161351e --- /dev/null +++ b/app/openssl/crypto/aes/aes_ige.c @@ -0,0 +1,323 @@ +/* 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; + } + } + } |