summaryrefslogtreecommitdiff
path: root/core/io/aes256.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'core/io/aes256.cpp')
-rw-r--r--core/io/aes256.cpp718
1 files changed, 359 insertions, 359 deletions
diff --git a/core/io/aes256.cpp b/core/io/aes256.cpp
index 69a5091f1d..e7f465dcc6 100644
--- a/core/io/aes256.cpp
+++ b/core/io/aes256.cpp
@@ -1,359 +1,359 @@
-/*
-* Byte-oriented AES-256 implementation.
-* All lookup tables replaced with 'on the fly' calculations.
-*
-* Copyright (c) 2007-2009 Ilya O. Levin, http://www.literatecode.com
-* Other contributors: Hal Finney
-*
-* Permission to use, copy, modify, and distribute this software for any
-* purpose with or without fee is hereby granted, provided that the above
-* copyright notice and this permission notice appear in all copies.
-*
-* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-#include "aes256.h"
-
-#define F(x) (((x)<<1) ^ ((((x)>>7) & 1) * 0x1b))
-#define FD(x) (((x) >> 1) ^ (((x) & 1) ? 0x8d : 0))
-
-// #define BACK_TO_TABLES
-#ifdef BACK_TO_TABLES
-
-const uint8_t sbox[256] = {
- 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
- 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
- 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
- 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
- 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
- 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
- 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
- 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
- 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
- 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
- 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
- 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
- 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
- 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
- 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
- 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
- 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
- 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
- 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
- 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
- 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
- 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
- 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
- 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
- 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
- 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
- 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
- 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
- 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
- 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
- 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
- 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
-};
-const uint8_t sboxinv[256] = {
- 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
- 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
- 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
- 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
- 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
- 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
- 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
- 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
- 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
- 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
- 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
- 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
- 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
- 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
- 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
- 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
- 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
- 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
- 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
- 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
- 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
- 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
- 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
- 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
- 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
- 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
- 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
- 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
- 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
- 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
- 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
- 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
-};
-
-#define rj_sbox(x) sbox[(x)]
-#define rj_sbox_inv(x) sboxinv[(x)]
-
-#else /* tableless subroutines */
-
-/* -------------------------------------------------------------------------- */
-uint8_t gf_alog(uint8_t x) // calculate anti-logarithm gen 3
-{
- uint8_t atb = 1, z;
-
- while (x--) {z = atb; atb <<= 1; if (z & 0x80) atb^= 0x1b; atb ^= z;}
-
- return atb;
-} /* gf_alog */
-
-/* -------------------------------------------------------------------------- */
-uint8_t gf_log(uint8_t x) // calculate logarithm gen 3
-{
- uint8_t atb = 1, i = 0, z;
-
- do {
- if (atb == x) break;
- z = atb; atb <<= 1; if (z & 0x80) atb^= 0x1b; atb ^= z;
- } while (++i > 0);
-
- return i;
-} /* gf_log */
-
-
-/* -------------------------------------------------------------------------- */
-uint8_t gf_mulinv(uint8_t x) // calculate multiplicative inverse
-{
- return (x) ? gf_alog(255 - gf_log(x)) : 0;
-} /* gf_mulinv */
-
-/* -------------------------------------------------------------------------- */
-uint8_t rj_sbox(uint8_t x)
-{
- uint8_t y, sb;
-
- sb = y = gf_mulinv(x);
- y = (y<<1)|(y>>7); sb ^= y; y = (y<<1)|(y>>7); sb ^= y;
- y = (y<<1)|(y>>7); sb ^= y; y = (y<<1)|(y>>7); sb ^= y;
-
- return (sb ^ 0x63);
-} /* rj_sbox */
-
-/* -------------------------------------------------------------------------- */
-uint8_t rj_sbox_inv(uint8_t x)
-{
- uint8_t y, sb;
-
- y = x ^ 0x63;
- sb = y = (y<<1)|(y>>7);
- y = (y<<2)|(y>>6); sb ^= y; y = (y<<3)|(y>>5); sb ^= y;
-
- return gf_mulinv(sb);
-} /* rj_sbox_inv */
-
-#endif
-
-/* -------------------------------------------------------------------------- */
-uint8_t rj_xtime(uint8_t x)
-{
- return (x & 0x80) ? ((x << 1) ^ 0x1b) : (x << 1);
-} /* rj_xtime */
-
-/* -------------------------------------------------------------------------- */
-void aes_subBytes(uint8_t *buf)
-{
- register uint8_t i = 16;
-
- while (i--) buf[i] = rj_sbox(buf[i]);
-} /* aes_subBytes */
-
-/* -------------------------------------------------------------------------- */
-void aes_subBytes_inv(uint8_t *buf)
-{
- register uint8_t i = 16;
-
- while (i--) buf[i] = rj_sbox_inv(buf[i]);
-} /* aes_subBytes_inv */
-
-/* -------------------------------------------------------------------------- */
-void aes_addRoundKey(uint8_t *buf, uint8_t *key)
-{
- register uint8_t i = 16;
-
- while (i--) buf[i] ^= key[i];
-} /* aes_addRoundKey */
-
-/* -------------------------------------------------------------------------- */
-void aes_addRoundKey_cpy(uint8_t *buf, uint8_t *key, uint8_t *cpk)
-{
- register uint8_t i = 16;
-
- while (i--) buf[i] ^= (cpk[i] = key[i]), cpk[16+i] = key[16 + i];
-} /* aes_addRoundKey_cpy */
-
-
-/* -------------------------------------------------------------------------- */
-void aes_shiftRows(uint8_t *buf)
-{
- register uint8_t i, j; /* to make it potentially parallelable :) */
-
- i = buf[1]; buf[1] = buf[5]; buf[5] = buf[9]; buf[9] = buf[13]; buf[13] = i;
- i = buf[10]; buf[10] = buf[2]; buf[2] = i;
- j = buf[3]; buf[3] = buf[15]; buf[15] = buf[11]; buf[11] = buf[7]; buf[7] = j;
- j = buf[14]; buf[14] = buf[6]; buf[6] = j;
-
-} /* aes_shiftRows */
-
-/* -------------------------------------------------------------------------- */
-void aes_shiftRows_inv(uint8_t *buf)
-{
- register uint8_t i, j; /* same as above :) */
-
- i = buf[1]; buf[1] = buf[13]; buf[13] = buf[9]; buf[9] = buf[5]; buf[5] = i;
- i = buf[2]; buf[2] = buf[10]; buf[10] = i;
- j = buf[3]; buf[3] = buf[7]; buf[7] = buf[11]; buf[11] = buf[15]; buf[15] = j;
- j = buf[6]; buf[6] = buf[14]; buf[14] = j;
-
-} /* aes_shiftRows_inv */
-
-/* -------------------------------------------------------------------------- */
-void aes_mixColumns(uint8_t *buf)
-{
- register uint8_t i, a, b, c, d, e;
-
- for (i = 0; i < 16; i += 4)
- {
- a = buf[i]; b = buf[i + 1]; c = buf[i + 2]; d = buf[i + 3];
- e = a ^ b ^ c ^ d;
- buf[i] ^= e ^ rj_xtime(a^b); buf[i+1] ^= e ^ rj_xtime(b^c);
- buf[i+2] ^= e ^ rj_xtime(c^d); buf[i+3] ^= e ^ rj_xtime(d^a);
- }
-} /* aes_mixColumns */
-
-/* -------------------------------------------------------------------------- */
-void aes_mixColumns_inv(uint8_t *buf)
-{
- register uint8_t i, a, b, c, d, e, x, y, z;
-
- for (i = 0; i < 16; i += 4)
- {
- a = buf[i]; b = buf[i + 1]; c = buf[i + 2]; d = buf[i + 3];
- e = a ^ b ^ c ^ d;
- z = rj_xtime(e);
- x = e ^ rj_xtime(rj_xtime(z^a^c)); y = e ^ rj_xtime(rj_xtime(z^b^d));
- buf[i] ^= x ^ rj_xtime(a^b); buf[i+1] ^= y ^ rj_xtime(b^c);
- buf[i+2] ^= x ^ rj_xtime(c^d); buf[i+3] ^= y ^ rj_xtime(d^a);
- }
-} /* aes_mixColumns_inv */
-
-/* -------------------------------------------------------------------------- */
-void aes_expandEncKey(uint8_t *k, uint8_t *rc)
-{
- register uint8_t i;
-
- k[0] ^= rj_sbox(k[29]) ^ (*rc);
- k[1] ^= rj_sbox(k[30]);
- k[2] ^= rj_sbox(k[31]);
- k[3] ^= rj_sbox(k[28]);
- *rc = F( *rc);
-
- for(i = 4; i < 16; i += 4) k[i] ^= k[i-4], k[i+1] ^= k[i-3],
- k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
- k[16] ^= rj_sbox(k[12]);
- k[17] ^= rj_sbox(k[13]);
- k[18] ^= rj_sbox(k[14]);
- k[19] ^= rj_sbox(k[15]);
-
- for(i = 20; i < 32; i += 4) k[i] ^= k[i-4], k[i+1] ^= k[i-3],
- k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
-
-} /* aes_expandEncKey */
-
-/* -------------------------------------------------------------------------- */
-void aes_expandDecKey(uint8_t *k, uint8_t *rc)
-{
- uint8_t i;
-
- for(i = 28; i > 16; i -= 4) k[i+0] ^= k[i-4], k[i+1] ^= k[i-3],
- k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
-
- k[16] ^= rj_sbox(k[12]);
- k[17] ^= rj_sbox(k[13]);
- k[18] ^= rj_sbox(k[14]);
- k[19] ^= rj_sbox(k[15]);
-
- for(i = 12; i > 0; i -= 4) k[i+0] ^= k[i-4], k[i+1] ^= k[i-3],
- k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
-
- *rc = FD(*rc);
- k[0] ^= rj_sbox(k[29]) ^ (*rc);
- k[1] ^= rj_sbox(k[30]);
- k[2] ^= rj_sbox(k[31]);
- k[3] ^= rj_sbox(k[28]);
-} /* aes_expandDecKey */
-
-
-/* -------------------------------------------------------------------------- */
-void aes256_init(aes256_context *ctx, uint8_t *k)
-{
- uint8_t rcon = 1;
- register uint8_t i;
-
- for (i = 0; i < sizeof(ctx->key); i++) ctx->enckey[i] = ctx->deckey[i] = k[i];
- for (i = 8;--i;) aes_expandEncKey(ctx->deckey, &rcon);
-} /* aes256_init */
-
-/* -------------------------------------------------------------------------- */
-void aes256_done(aes256_context *ctx)
-{
- register uint8_t i;
-
- for (i = 0; i < sizeof(ctx->key); i++)
- ctx->key[i] = ctx->enckey[i] = ctx->deckey[i] = 0;
-} /* aes256_done */
-
-/* -------------------------------------------------------------------------- */
-void aes256_encrypt_ecb(aes256_context *ctx, uint8_t *buf)
-{
- uint8_t i, rcon;
-
- aes_addRoundKey_cpy(buf, ctx->enckey, ctx->key);
- for(i = 1, rcon = 1; i < 14; ++i)
- {
- aes_subBytes(buf);
- aes_shiftRows(buf);
- aes_mixColumns(buf);
- if( i & 1 ) aes_addRoundKey( buf, &ctx->key[16]);
- else aes_expandEncKey(ctx->key, &rcon), aes_addRoundKey(buf, ctx->key);
- }
- aes_subBytes(buf);
- aes_shiftRows(buf);
- aes_expandEncKey(ctx->key, &rcon);
- aes_addRoundKey(buf, ctx->key);
-} /* aes256_encrypt */
-
-/* -------------------------------------------------------------------------- */
-void aes256_decrypt_ecb(aes256_context *ctx, uint8_t *buf)
-{
- uint8_t i, rcon;
-
- aes_addRoundKey_cpy(buf, ctx->deckey, ctx->key);
- aes_shiftRows_inv(buf);
- aes_subBytes_inv(buf);
-
- for (i = 14, rcon = 0x80; --i;)
- {
- if( ( i & 1 ) )
- {
- aes_expandDecKey(ctx->key, &rcon);
- aes_addRoundKey(buf, &ctx->key[16]);
- }
- else aes_addRoundKey(buf, ctx->key);
- aes_mixColumns_inv(buf);
- aes_shiftRows_inv(buf);
- aes_subBytes_inv(buf);
- }
- aes_addRoundKey( buf, ctx->key);
-} /* aes256_decrypt */
+/*
+* Byte-oriented AES-256 implementation.
+* All lookup tables replaced with 'on the fly' calculations.
+*
+* Copyright (c) 2007-2009 Ilya O. Levin, http://www.literatecode.com
+* Other contributors: Hal Finney
+*
+* Permission to use, copy, modify, and distribute this software for any
+* purpose with or without fee is hereby granted, provided that the above
+* copyright notice and this permission notice appear in all copies.
+*
+* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+#include "aes256.h"
+
+#define F(x) (((x)<<1) ^ ((((x)>>7) & 1) * 0x1b))
+#define FD(x) (((x) >> 1) ^ (((x) & 1) ? 0x8d : 0))
+
+// #define BACK_TO_TABLES
+#ifdef BACK_TO_TABLES
+
+const uint8_t sbox[256] = {
+ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
+ 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
+ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
+ 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
+ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
+ 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
+ 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
+ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
+ 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
+ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
+ 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
+ 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
+ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
+ 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
+ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
+ 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
+ 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
+ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
+ 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
+ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
+ 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
+ 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
+ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
+ 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
+ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
+ 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
+ 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
+};
+const uint8_t sboxinv[256] = {
+ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
+ 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
+ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
+ 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
+ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
+ 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
+ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
+ 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
+ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
+ 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
+ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
+ 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
+ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
+ 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
+ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
+ 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
+ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
+ 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
+ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
+ 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
+ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
+ 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
+ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
+ 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
+ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
+ 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
+ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
+ 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
+ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
+ 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
+ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
+ 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
+};
+
+#define rj_sbox(x) sbox[(x)]
+#define rj_sbox_inv(x) sboxinv[(x)]
+
+#else /* tableless subroutines */
+
+/* -------------------------------------------------------------------------- */
+uint8_t gf_alog(uint8_t x) // calculate anti-logarithm gen 3
+{
+ uint8_t atb = 1, z;
+
+ while (x--) {z = atb; atb <<= 1; if (z & 0x80) atb^= 0x1b; atb ^= z;}
+
+ return atb;
+} /* gf_alog */
+
+/* -------------------------------------------------------------------------- */
+uint8_t gf_log(uint8_t x) // calculate logarithm gen 3
+{
+ uint8_t atb = 1, i = 0, z;
+
+ do {
+ if (atb == x) break;
+ z = atb; atb <<= 1; if (z & 0x80) atb^= 0x1b; atb ^= z;
+ } while (++i > 0);
+
+ return i;
+} /* gf_log */
+
+
+/* -------------------------------------------------------------------------- */
+uint8_t gf_mulinv(uint8_t x) // calculate multiplicative inverse
+{
+ return (x) ? gf_alog(255 - gf_log(x)) : 0;
+} /* gf_mulinv */
+
+/* -------------------------------------------------------------------------- */
+uint8_t rj_sbox(uint8_t x)
+{
+ uint8_t y, sb;
+
+ sb = y = gf_mulinv(x);
+ y = (y<<1)|(y>>7); sb ^= y; y = (y<<1)|(y>>7); sb ^= y;
+ y = (y<<1)|(y>>7); sb ^= y; y = (y<<1)|(y>>7); sb ^= y;
+
+ return (sb ^ 0x63);
+} /* rj_sbox */
+
+/* -------------------------------------------------------------------------- */
+uint8_t rj_sbox_inv(uint8_t x)
+{
+ uint8_t y, sb;
+
+ y = x ^ 0x63;
+ sb = y = (y<<1)|(y>>7);
+ y = (y<<2)|(y>>6); sb ^= y; y = (y<<3)|(y>>5); sb ^= y;
+
+ return gf_mulinv(sb);
+} /* rj_sbox_inv */
+
+#endif
+
+/* -------------------------------------------------------------------------- */
+uint8_t rj_xtime(uint8_t x)
+{
+ return (x & 0x80) ? ((x << 1) ^ 0x1b) : (x << 1);
+} /* rj_xtime */
+
+/* -------------------------------------------------------------------------- */
+void aes_subBytes(uint8_t *buf)
+{
+ register uint8_t i = 16;
+
+ while (i--) buf[i] = rj_sbox(buf[i]);
+} /* aes_subBytes */
+
+/* -------------------------------------------------------------------------- */
+void aes_subBytes_inv(uint8_t *buf)
+{
+ register uint8_t i = 16;
+
+ while (i--) buf[i] = rj_sbox_inv(buf[i]);
+} /* aes_subBytes_inv */
+
+/* -------------------------------------------------------------------------- */
+void aes_addRoundKey(uint8_t *buf, uint8_t *key)
+{
+ register uint8_t i = 16;
+
+ while (i--) buf[i] ^= key[i];
+} /* aes_addRoundKey */
+
+/* -------------------------------------------------------------------------- */
+void aes_addRoundKey_cpy(uint8_t *buf, uint8_t *key, uint8_t *cpk)
+{
+ register uint8_t i = 16;
+
+ while (i--) buf[i] ^= (cpk[i] = key[i]), cpk[16+i] = key[16 + i];
+} /* aes_addRoundKey_cpy */
+
+
+/* -------------------------------------------------------------------------- */
+void aes_shiftRows(uint8_t *buf)
+{
+ register uint8_t i, j; /* to make it potentially parallelable :) */
+
+ i = buf[1]; buf[1] = buf[5]; buf[5] = buf[9]; buf[9] = buf[13]; buf[13] = i;
+ i = buf[10]; buf[10] = buf[2]; buf[2] = i;
+ j = buf[3]; buf[3] = buf[15]; buf[15] = buf[11]; buf[11] = buf[7]; buf[7] = j;
+ j = buf[14]; buf[14] = buf[6]; buf[6] = j;
+
+} /* aes_shiftRows */
+
+/* -------------------------------------------------------------------------- */
+void aes_shiftRows_inv(uint8_t *buf)
+{
+ register uint8_t i, j; /* same as above :) */
+
+ i = buf[1]; buf[1] = buf[13]; buf[13] = buf[9]; buf[9] = buf[5]; buf[5] = i;
+ i = buf[2]; buf[2] = buf[10]; buf[10] = i;
+ j = buf[3]; buf[3] = buf[7]; buf[7] = buf[11]; buf[11] = buf[15]; buf[15] = j;
+ j = buf[6]; buf[6] = buf[14]; buf[14] = j;
+
+} /* aes_shiftRows_inv */
+
+/* -------------------------------------------------------------------------- */
+void aes_mixColumns(uint8_t *buf)
+{
+ register uint8_t i, a, b, c, d, e;
+
+ for (i = 0; i < 16; i += 4)
+ {
+ a = buf[i]; b = buf[i + 1]; c = buf[i + 2]; d = buf[i + 3];
+ e = a ^ b ^ c ^ d;
+ buf[i] ^= e ^ rj_xtime(a^b); buf[i+1] ^= e ^ rj_xtime(b^c);
+ buf[i+2] ^= e ^ rj_xtime(c^d); buf[i+3] ^= e ^ rj_xtime(d^a);
+ }
+} /* aes_mixColumns */
+
+/* -------------------------------------------------------------------------- */
+void aes_mixColumns_inv(uint8_t *buf)
+{
+ register uint8_t i, a, b, c, d, e, x, y, z;
+
+ for (i = 0; i < 16; i += 4)
+ {
+ a = buf[i]; b = buf[i + 1]; c = buf[i + 2]; d = buf[i + 3];
+ e = a ^ b ^ c ^ d;
+ z = rj_xtime(e);
+ x = e ^ rj_xtime(rj_xtime(z^a^c)); y = e ^ rj_xtime(rj_xtime(z^b^d));
+ buf[i] ^= x ^ rj_xtime(a^b); buf[i+1] ^= y ^ rj_xtime(b^c);
+ buf[i+2] ^= x ^ rj_xtime(c^d); buf[i+3] ^= y ^ rj_xtime(d^a);
+ }
+} /* aes_mixColumns_inv */
+
+/* -------------------------------------------------------------------------- */
+void aes_expandEncKey(uint8_t *k, uint8_t *rc)
+{
+ register uint8_t i;
+
+ k[0] ^= rj_sbox(k[29]) ^ (*rc);
+ k[1] ^= rj_sbox(k[30]);
+ k[2] ^= rj_sbox(k[31]);
+ k[3] ^= rj_sbox(k[28]);
+ *rc = F( *rc);
+
+ for(i = 4; i < 16; i += 4) k[i] ^= k[i-4], k[i+1] ^= k[i-3],
+ k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
+ k[16] ^= rj_sbox(k[12]);
+ k[17] ^= rj_sbox(k[13]);
+ k[18] ^= rj_sbox(k[14]);
+ k[19] ^= rj_sbox(k[15]);
+
+ for(i = 20; i < 32; i += 4) k[i] ^= k[i-4], k[i+1] ^= k[i-3],
+ k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
+
+} /* aes_expandEncKey */
+
+/* -------------------------------------------------------------------------- */
+void aes_expandDecKey(uint8_t *k, uint8_t *rc)
+{
+ uint8_t i;
+
+ for(i = 28; i > 16; i -= 4) k[i+0] ^= k[i-4], k[i+1] ^= k[i-3],
+ k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
+
+ k[16] ^= rj_sbox(k[12]);
+ k[17] ^= rj_sbox(k[13]);
+ k[18] ^= rj_sbox(k[14]);
+ k[19] ^= rj_sbox(k[15]);
+
+ for(i = 12; i > 0; i -= 4) k[i+0] ^= k[i-4], k[i+1] ^= k[i-3],
+ k[i+2] ^= k[i-2], k[i+3] ^= k[i-1];
+
+ *rc = FD(*rc);
+ k[0] ^= rj_sbox(k[29]) ^ (*rc);
+ k[1] ^= rj_sbox(k[30]);
+ k[2] ^= rj_sbox(k[31]);
+ k[3] ^= rj_sbox(k[28]);
+} /* aes_expandDecKey */
+
+
+/* -------------------------------------------------------------------------- */
+void aes256_init(aes256_context *ctx, uint8_t *k)
+{
+ uint8_t rcon = 1;
+ register uint8_t i;
+
+ for (i = 0; i < sizeof(ctx->key); i++) ctx->enckey[i] = ctx->deckey[i] = k[i];
+ for (i = 8;--i;) aes_expandEncKey(ctx->deckey, &rcon);
+} /* aes256_init */
+
+/* -------------------------------------------------------------------------- */
+void aes256_done(aes256_context *ctx)
+{
+ register uint8_t i;
+
+ for (i = 0; i < sizeof(ctx->key); i++)
+ ctx->key[i] = ctx->enckey[i] = ctx->deckey[i] = 0;
+} /* aes256_done */
+
+/* -------------------------------------------------------------------------- */
+void aes256_encrypt_ecb(aes256_context *ctx, uint8_t *buf)
+{
+ uint8_t i, rcon;
+
+ aes_addRoundKey_cpy(buf, ctx->enckey, ctx->key);
+ for(i = 1, rcon = 1; i < 14; ++i)
+ {
+ aes_subBytes(buf);
+ aes_shiftRows(buf);
+ aes_mixColumns(buf);
+ if( i & 1 ) aes_addRoundKey( buf, &ctx->key[16]);
+ else aes_expandEncKey(ctx->key, &rcon), aes_addRoundKey(buf, ctx->key);
+ }
+ aes_subBytes(buf);
+ aes_shiftRows(buf);
+ aes_expandEncKey(ctx->key, &rcon);
+ aes_addRoundKey(buf, ctx->key);
+} /* aes256_encrypt */
+
+/* -------------------------------------------------------------------------- */
+void aes256_decrypt_ecb(aes256_context *ctx, uint8_t *buf)
+{
+ uint8_t i, rcon;
+
+ aes_addRoundKey_cpy(buf, ctx->deckey, ctx->key);
+ aes_shiftRows_inv(buf);
+ aes_subBytes_inv(buf);
+
+ for (i = 14, rcon = 0x80; --i;)
+ {
+ if( ( i & 1 ) )
+ {
+ aes_expandDecKey(ctx->key, &rcon);
+ aes_addRoundKey(buf, &ctx->key[16]);
+ }
+ else aes_addRoundKey(buf, ctx->key);
+ aes_mixColumns_inv(buf);
+ aes_shiftRows_inv(buf);
+ aes_subBytes_inv(buf);
+ }
+ aes_addRoundKey( buf, ctx->key);
+} /* aes256_decrypt */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 05:31:15 +0000