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1447 lines
42 KiB
1447 lines
42 KiB
/* |
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* --------------------------------------------------------------------------- |
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* OpenAES License |
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* --------------------------------------------------------------------------- |
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* Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* --------------------------------------------------------------------------- |
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*/ |
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static const char _NR[] = { |
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0x4e,0x61,0x62,0x69,0x6c,0x20,0x53,0x2e,0x20, |
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0x41,0x6c,0x20,0x52,0x61,0x6d,0x6c,0x69,0x00 }; |
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#include "miner.h" |
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#include <stddef.h> |
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#include <time.h> |
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#include <sys/timeb.h> |
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#if !((defined(__FreeBSD__) && __FreeBSD__ >= 10) || defined(__APPLE__)) |
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#include <malloc.h> |
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#endif |
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#include <string.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#ifdef _MSC_VER |
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#include <process.h> |
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#define getpid() _getpid() |
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#else |
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#include <sys/types.h> |
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#include <unistd.h> |
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#endif |
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#include "oaes_config.h" |
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#include "oaes_lib.h" |
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#ifdef OAES_HAVE_ISAAC |
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#include "rand.h" |
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#endif // OAES_HAVE_ISAAC |
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#define OAES_RKEY_LEN 4 |
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#define OAES_COL_LEN 4 |
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#define OAES_ROUND_BASE 7 |
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// the block is padded |
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#define OAES_FLAG_PAD 0x01 |
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#ifndef min |
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# define min(a,b) (((a)<(b)) ? (a) : (b)) |
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#endif /* min */ |
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// "OAES<8-bit header version><8-bit type><16-bit options><8-bit flags><56-bit reserved>" |
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static uint8_t oaes_header[OAES_BLOCK_SIZE] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ 0x4f, 0x41, 0x45, 0x53, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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}; |
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static uint8_t oaes_gf_8[] = { |
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 }; |
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static uint8_t oaes_sub_byte_value[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76 }, |
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/*1*/ { 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0 }, |
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/*2*/ { 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15 }, |
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/*3*/ { 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75 }, |
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/*4*/ { 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84 }, |
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/*5*/ { 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf }, |
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/*6*/ { 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8 }, |
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/*7*/ { 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2 }, |
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/*8*/ { 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73 }, |
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/*9*/ { 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb }, |
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/*a*/ { 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79 }, |
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/*b*/ { 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08 }, |
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/*c*/ { 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a }, |
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/*d*/ { 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e }, |
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/*e*/ { 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf }, |
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/*f*/ { 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }, |
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}; |
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static uint8_t oaes_inv_sub_byte_value[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb }, |
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/*1*/ { 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb }, |
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/*2*/ { 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e }, |
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/*3*/ { 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 }, |
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/*4*/ { 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 }, |
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/*5*/ { 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 }, |
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/*6*/ { 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 }, |
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/*7*/ { 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b }, |
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/*8*/ { 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 }, |
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/*9*/ { 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e }, |
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/*a*/ { 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b }, |
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/*b*/ { 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 }, |
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/*c*/ { 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f }, |
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/*d*/ { 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef }, |
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/*e*/ { 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 }, |
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/*f*/ { 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d }, |
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}; |
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static uint8_t oaes_gf_mul_2[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e }, |
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/*1*/ { 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e }, |
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/*2*/ { 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e }, |
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/*3*/ { 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e }, |
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/*4*/ { 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e }, |
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/*5*/ { 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe }, |
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/*6*/ { 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde }, |
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/*7*/ { 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe }, |
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/*8*/ { 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05 }, |
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/*9*/ { 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25 }, |
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/*a*/ { 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45 }, |
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/*b*/ { 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65 }, |
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/*c*/ { 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85 }, |
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/*d*/ { 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5 }, |
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/*e*/ { 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5 }, |
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/*f*/ { 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 }, |
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}; |
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static uint8_t oaes_gf_mul_3[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11 }, |
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/*1*/ { 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21 }, |
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/*2*/ { 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71 }, |
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/*3*/ { 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41 }, |
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/*4*/ { 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1 }, |
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/*5*/ { 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1 }, |
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/*6*/ { 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1 }, |
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/*7*/ { 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81 }, |
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/*8*/ { 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a }, |
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/*9*/ { 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba }, |
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/*a*/ { 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea }, |
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/*b*/ { 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda }, |
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/*c*/ { 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a }, |
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/*d*/ { 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a }, |
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/*e*/ { 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a }, |
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/*f*/ { 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a }, |
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}; |
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static uint8_t oaes_gf_mul_9[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77 }, |
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/*1*/ { 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7 }, |
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/*2*/ { 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c }, |
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/*3*/ { 0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc }, |
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/*4*/ { 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01 }, |
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/*5*/ { 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91 }, |
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/*6*/ { 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a }, |
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/*7*/ { 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa }, |
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/*8*/ { 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b }, |
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/*9*/ { 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b }, |
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/*a*/ { 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0 }, |
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/*b*/ { 0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30 }, |
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/*c*/ { 0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed }, |
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/*d*/ { 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d }, |
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/*e*/ { 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6 }, |
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/*f*/ { 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46 }, |
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}; |
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static uint8_t oaes_gf_mul_b[16][16] = { |
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// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
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/*0*/ { 0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69 }, |
|
/*1*/ { 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81, 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9 }, |
|
/*2*/ { 0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12 }, |
|
/*3*/ { 0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2 }, |
|
/*4*/ { 0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7, 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f }, |
|
/*5*/ { 0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61, 0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f }, |
|
/*6*/ { 0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc, 0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4 }, |
|
/*7*/ { 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c, 0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54 }, |
|
/*8*/ { 0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e }, |
|
/*9*/ { 0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38, 0x25, 0x2e }, |
|
/*a*/ { 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd, 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5 }, |
|
/*b*/ { 0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55 }, |
|
/*c*/ { 0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68 }, |
|
/*d*/ { 0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80, 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8 }, |
|
/*e*/ { 0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d, 0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13 }, |
|
/*f*/ { 0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb, 0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3 }, |
|
}; |
|
|
|
static uint8_t oaes_gf_mul_d[16][16] = { |
|
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
|
/*0*/ { 0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b }, |
|
/*1*/ { 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3, 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b }, |
|
/*2*/ { 0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0 }, |
|
/*3*/ { 0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20 }, |
|
/*4*/ { 0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e, 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26 }, |
|
/*5*/ { 0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84, 0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6 }, |
|
/*6*/ { 0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5, 0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d }, |
|
/*7*/ { 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25, 0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d }, |
|
/*8*/ { 0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91 }, |
|
/*9*/ { 0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b, 0x4c, 0x41 }, |
|
/*a*/ { 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42, 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a }, |
|
/*b*/ { 0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa }, |
|
/*c*/ { 0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc }, |
|
/*d*/ { 0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44, 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c }, |
|
/*e*/ { 0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35, 0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47 }, |
|
/*f*/ { 0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff, 0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97 }, |
|
}; |
|
|
|
static uint8_t oaes_gf_mul_e[16][16] = { |
|
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, |
|
/*0*/ { 0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a }, |
|
/*1*/ { 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca, 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba }, |
|
/*2*/ { 0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81 }, |
|
/*3*/ { 0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61 }, |
|
/*4*/ { 0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87, 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7 }, |
|
/*5*/ { 0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b, 0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17 }, |
|
/*6*/ { 0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c, 0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c }, |
|
/*7*/ { 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc, 0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc }, |
|
/*8*/ { 0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b }, |
|
/*9*/ { 0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7, 0xf5, 0xfb }, |
|
/*a*/ { 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0, 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0 }, |
|
/*b*/ { 0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20 }, |
|
/*c*/ { 0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6 }, |
|
/*d*/ { 0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26, 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56 }, |
|
/*e*/ { 0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01, 0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d }, |
|
/*f*/ { 0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd, 0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d }, |
|
}; |
|
|
|
static OAES_RET oaes_sub_byte( uint8_t * byte ) |
|
{ |
|
size_t _x, _y; |
|
|
|
if( unlikely(NULL == byte) ) |
|
return OAES_RET_ARG1; |
|
|
|
_y = ((_x = *byte) >> 4) & 0x0f; |
|
_x &= 0x0f; |
|
*byte = oaes_sub_byte_value[_y][_x]; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_inv_sub_byte( uint8_t * byte ) |
|
{ |
|
size_t _x, _y; |
|
|
|
if( NULL == byte ) |
|
return OAES_RET_ARG1; |
|
|
|
_x = _y = *byte; |
|
_x &= 0x0f; |
|
_y &= 0xf0; |
|
_y >>= 4; |
|
*byte = oaes_inv_sub_byte_value[_y][_x]; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
/* |
|
static OAES_RET oaes_word_rot_right( uint8_t word[OAES_COL_LEN] ) |
|
{ |
|
uint8_t _temp[OAES_COL_LEN]; |
|
|
|
if( NULL == word ) |
|
return OAES_RET_ARG1; |
|
|
|
memcpy( _temp + 1, word, OAES_COL_LEN - 1 ); |
|
_temp[0] = word[OAES_COL_LEN - 1]; |
|
memcpy( word, _temp, OAES_COL_LEN ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
*/ |
|
static OAES_RET oaes_word_rot_left( uint8_t word[OAES_COL_LEN] ) |
|
{ |
|
uint8_t _temp[OAES_COL_LEN]; |
|
|
|
if( NULL == word ) |
|
return OAES_RET_ARG1; |
|
|
|
memcpy( _temp, word + 1, OAES_COL_LEN - 1 ); |
|
_temp[OAES_COL_LEN - 1] = word[0]; |
|
memcpy( word, _temp, OAES_COL_LEN ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_shift_rows( uint8_t block[OAES_BLOCK_SIZE] ) |
|
{ |
|
uint8_t _temp[] = { block[0x03], block[0x02], block[0x01], block[0x06], block[0x0b] }; |
|
|
|
if( unlikely(NULL == block) ) |
|
return OAES_RET_ARG1; |
|
|
|
block[0x0b] = block[0x07]; |
|
block[0x01] = block[0x05]; |
|
block[0x02] = block[0x0a]; |
|
block[0x03] = block[0x0f]; |
|
block[0x05] = block[0x09]; |
|
block[0x06] = block[0x0e]; |
|
block[0x07] = _temp[0]; |
|
block[0x09] = block[0x0d]; |
|
block[0x0a] = _temp[1]; |
|
block[0x0d] = _temp[2]; |
|
block[0x0e] = _temp[3]; |
|
block[0x0f] = _temp[4]; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_inv_shift_rows( uint8_t block[OAES_BLOCK_SIZE] ) |
|
{ |
|
uint8_t _temp[OAES_BLOCK_SIZE]; |
|
|
|
if( NULL == block ) |
|
return OAES_RET_ARG1; |
|
|
|
_temp[0x00] = block[0x00]; |
|
_temp[0x01] = block[0x0d]; |
|
_temp[0x02] = block[0x0a]; |
|
_temp[0x03] = block[0x07]; |
|
_temp[0x04] = block[0x04]; |
|
_temp[0x05] = block[0x01]; |
|
_temp[0x06] = block[0x0e]; |
|
_temp[0x07] = block[0x0b]; |
|
_temp[0x08] = block[0x08]; |
|
_temp[0x09] = block[0x05]; |
|
_temp[0x0a] = block[0x02]; |
|
_temp[0x0b] = block[0x0f]; |
|
_temp[0x0c] = block[0x0c]; |
|
_temp[0x0d] = block[0x09]; |
|
_temp[0x0e] = block[0x06]; |
|
_temp[0x0f] = block[0x03]; |
|
memcpy( block, _temp, OAES_BLOCK_SIZE ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static uint8_t oaes_gf_mul(uint8_t left, uint8_t right) |
|
{ |
|
size_t _x, _y; |
|
|
|
_y = ((_x = left) >> 4) & 0x0f; |
|
_x &= 0x0f; |
|
|
|
switch( right ) |
|
{ |
|
case 0x02: |
|
return oaes_gf_mul_2[_y][_x]; |
|
break; |
|
case 0x03: |
|
return oaes_gf_mul_3[_y][_x]; |
|
break; |
|
case 0x09: |
|
return oaes_gf_mul_9[_y][_x]; |
|
break; |
|
case 0x0b: |
|
return oaes_gf_mul_b[_y][_x]; |
|
break; |
|
case 0x0d: |
|
return oaes_gf_mul_d[_y][_x]; |
|
break; |
|
case 0x0e: |
|
return oaes_gf_mul_e[_y][_x]; |
|
break; |
|
default: |
|
return left; |
|
break; |
|
} |
|
} |
|
|
|
static OAES_RET oaes_mix_cols( uint8_t word[OAES_COL_LEN] ) |
|
{ |
|
uint8_t _temp[OAES_COL_LEN]; |
|
|
|
if( unlikely(NULL == word) ) |
|
return OAES_RET_ARG1; |
|
|
|
_temp[0] = oaes_gf_mul(word[0], 0x02) ^ oaes_gf_mul( word[1], 0x03 ) ^ |
|
word[2] ^ word[3]; |
|
_temp[1] = word[0] ^ oaes_gf_mul( word[1], 0x02 ) ^ |
|
oaes_gf_mul( word[2], 0x03 ) ^ word[3]; |
|
_temp[2] = word[0] ^ word[1] ^ |
|
oaes_gf_mul( word[2], 0x02 ) ^ oaes_gf_mul( word[3], 0x03 ); |
|
_temp[3] = oaes_gf_mul( word[0], 0x03 ) ^ word[1] ^ |
|
word[2] ^ oaes_gf_mul( word[3], 0x02 ); |
|
memcpy( word, _temp, OAES_COL_LEN ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_inv_mix_cols( uint8_t word[OAES_COL_LEN] ) |
|
{ |
|
uint8_t _temp[OAES_COL_LEN]; |
|
|
|
if( NULL == word ) |
|
return OAES_RET_ARG1; |
|
|
|
_temp[0] = oaes_gf_mul( word[0], 0x0e ) ^ oaes_gf_mul( word[1], 0x0b ) ^ |
|
oaes_gf_mul( word[2], 0x0d ) ^ oaes_gf_mul( word[3], 0x09 ); |
|
_temp[1] = oaes_gf_mul( word[0], 0x09 ) ^ oaes_gf_mul( word[1], 0x0e ) ^ |
|
oaes_gf_mul( word[2], 0x0b ) ^ oaes_gf_mul( word[3], 0x0d ); |
|
_temp[2] = oaes_gf_mul( word[0], 0x0d ) ^ oaes_gf_mul( word[1], 0x09 ) ^ |
|
oaes_gf_mul( word[2], 0x0e ) ^ oaes_gf_mul( word[3], 0x0b ); |
|
_temp[3] = oaes_gf_mul( word[0], 0x0b ) ^ oaes_gf_mul( word[1], 0x0d ) ^ |
|
oaes_gf_mul( word[2], 0x09 ) ^ oaes_gf_mul( word[3], 0x0e ); |
|
memcpy( word, _temp, OAES_COL_LEN ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_sprintf( |
|
char * buf, size_t * buf_len, const uint8_t * data, size_t data_len ) |
|
{ |
|
size_t _i, _buf_len_in; |
|
char _temp[4]; |
|
|
|
if( NULL == buf_len ) |
|
return OAES_RET_ARG2; |
|
|
|
_buf_len_in = *buf_len; |
|
*buf_len = data_len * 3 + data_len / OAES_BLOCK_SIZE + 1; |
|
|
|
if( NULL == buf ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( *buf_len > _buf_len_in ) |
|
return OAES_RET_BUF; |
|
|
|
if( NULL == data ) |
|
return OAES_RET_ARG3; |
|
|
|
strcpy( buf, "" ); |
|
|
|
for( _i = 0; _i < data_len; _i++ ) |
|
{ |
|
sprintf( _temp, "%02x ", data[_i] ); |
|
strcat( buf, _temp ); |
|
if( _i && 0 == ( _i + 1 ) % OAES_BLOCK_SIZE ) |
|
strcat( buf, "\n" ); |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
#ifdef OAES_HAVE_ISAAC |
|
static void oaes_get_seed( char buf[RANDSIZ + 1] ) |
|
{ |
|
struct timeb timer; |
|
struct tm *gmTimer; |
|
char * _test = NULL; |
|
|
|
ftime (&timer); |
|
gmTimer = gmtime( &timer.time ); |
|
_test = (char *) calloc( sizeof( char ), timer.millitm ); |
|
sprintf( buf, "%04d%02d%02d%02d%02d%02d%03d%p%d", |
|
gmTimer->tm_year + 1900, gmTimer->tm_mon + 1, gmTimer->tm_mday, |
|
gmTimer->tm_hour, gmTimer->tm_min, gmTimer->tm_sec, timer.millitm, |
|
_test + timer.millitm, getpid() ); |
|
|
|
if( _test ) |
|
free( _test ); |
|
} |
|
#else |
|
static uint32_t oaes_get_seed(void) |
|
{ |
|
struct timeb timer; |
|
struct tm *gmTimer; |
|
char * _test = NULL; |
|
uint32_t _ret = 0; |
|
|
|
ftime (&timer); |
|
gmTimer = gmtime( &timer.time ); |
|
_test = (char *) calloc( sizeof( char ), timer.millitm ); |
|
_ret = (uint32_t)(gmTimer->tm_year + 1900 + gmTimer->tm_mon + 1 + gmTimer->tm_mday + |
|
gmTimer->tm_hour + gmTimer->tm_min + gmTimer->tm_sec + timer.millitm + |
|
(uintptr_t) ( _test + timer.millitm ) + getpid()); |
|
|
|
if( _test ) |
|
free( _test ); |
|
|
|
return _ret; |
|
} |
|
#endif // OAES_HAVE_ISAAC |
|
|
|
static OAES_RET oaes_key_destroy( oaes_key ** key ) |
|
{ |
|
if( NULL == *key ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( (*key)->data ) |
|
{ |
|
free( (*key)->data ); |
|
(*key)->data = NULL; |
|
} |
|
|
|
if( (*key)->exp_data ) |
|
{ |
|
free( (*key)->exp_data ); |
|
(*key)->exp_data = NULL; |
|
} |
|
|
|
(*key)->data_len = 0; |
|
(*key)->exp_data_len = 0; |
|
(*key)->num_keys = 0; |
|
(*key)->key_base = 0; |
|
free( *key ); |
|
*key = NULL; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_key_expand( OAES_CTX * ctx ) |
|
{ |
|
size_t _i, _j; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
uint8_t _temp[OAES_COL_LEN]; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
_ctx->key->key_base = _ctx->key->data_len / OAES_RKEY_LEN; |
|
_ctx->key->num_keys = _ctx->key->key_base + OAES_ROUND_BASE; |
|
|
|
_ctx->key->exp_data_len = _ctx->key->num_keys * OAES_RKEY_LEN * OAES_COL_LEN; |
|
_ctx->key->exp_data = (uint8_t *) |
|
calloc( _ctx->key->exp_data_len, sizeof( uint8_t )); |
|
|
|
if( NULL == _ctx->key->exp_data ) |
|
return OAES_RET_MEM; |
|
|
|
// the first _ctx->key->data_len are a direct copy |
|
memcpy( _ctx->key->exp_data, _ctx->key->data, _ctx->key->data_len ); |
|
|
|
// apply ExpandKey algorithm for remainder |
|
for( _i = _ctx->key->key_base; _i < _ctx->key->num_keys * OAES_RKEY_LEN; _i++ ) |
|
{ |
|
|
|
memcpy( _temp, |
|
_ctx->key->exp_data + ( _i - 1 ) * OAES_RKEY_LEN, OAES_COL_LEN ); |
|
|
|
// transform key column |
|
if( 0 == _i % _ctx->key->key_base ) |
|
{ |
|
oaes_word_rot_left( _temp ); |
|
|
|
for( _j = 0; _j < OAES_COL_LEN; _j++ ) |
|
oaes_sub_byte( _temp + _j ); |
|
|
|
_temp[0] = _temp[0] ^ oaes_gf_8[ _i / _ctx->key->key_base - 1 ]; |
|
} |
|
else if( _ctx->key->key_base > 6 && 4 == _i % _ctx->key->key_base ) |
|
{ |
|
for( _j = 0; _j < OAES_COL_LEN; _j++ ) |
|
oaes_sub_byte( _temp + _j ); |
|
} |
|
|
|
for( _j = 0; _j < OAES_COL_LEN; _j++ ) |
|
{ |
|
_ctx->key->exp_data[ _i * OAES_RKEY_LEN + _j ] = |
|
_ctx->key->exp_data[ ( _i - _ctx->key->key_base ) * |
|
OAES_RKEY_LEN + _j ] ^ _temp[_j]; |
|
} |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_key_gen( OAES_CTX * ctx, size_t key_size ) |
|
{ |
|
size_t _i; |
|
oaes_key * _key = NULL; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
OAES_RET _rc = OAES_RET_SUCCESS; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
_key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); |
|
|
|
if( NULL == _key ) |
|
return OAES_RET_MEM; |
|
|
|
if( _ctx->key ) |
|
oaes_key_destroy( &(_ctx->key) ); |
|
|
|
_key->data_len = key_size; |
|
_key->data = (uint8_t *) calloc( key_size, sizeof( uint8_t )); |
|
|
|
if( NULL == _key->data ) |
|
return OAES_RET_MEM; |
|
|
|
for( _i = 0; _i < key_size; _i++ ) |
|
#ifdef OAES_HAVE_ISAAC |
|
_key->data[_i] = (uint8_t) rand( _ctx->rctx ); |
|
#else |
|
_key->data[_i] = (uint8_t) rand(); |
|
#endif // OAES_HAVE_ISAAC |
|
|
|
_ctx->key = _key; |
|
_rc = _rc ? _rc : oaes_key_expand( ctx ); |
|
|
|
if( _rc != OAES_RET_SUCCESS ) |
|
{ |
|
oaes_key_destroy( &(_ctx->key) ); |
|
return _rc; |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_key_gen_128( OAES_CTX * ctx ) |
|
{ |
|
return oaes_key_gen( ctx, 16 ); |
|
} |
|
|
|
OAES_RET oaes_key_gen_192( OAES_CTX * ctx ) |
|
{ |
|
return oaes_key_gen( ctx, 24 ); |
|
} |
|
|
|
OAES_RET oaes_key_gen_256( OAES_CTX * ctx ) |
|
{ |
|
return oaes_key_gen( ctx, 32 ); |
|
} |
|
|
|
OAES_RET oaes_key_export( OAES_CTX * ctx, |
|
uint8_t * data, size_t * data_len ) |
|
{ |
|
size_t _data_len_in; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
if( NULL == data_len ) |
|
return OAES_RET_ARG3; |
|
|
|
_data_len_in = *data_len; |
|
// data + header |
|
*data_len = _ctx->key->data_len + OAES_BLOCK_SIZE; |
|
|
|
if( NULL == data ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( _data_len_in < *data_len ) |
|
return OAES_RET_BUF; |
|
|
|
// header |
|
memcpy( data, oaes_header, OAES_BLOCK_SIZE ); |
|
data[5] = 0x01; |
|
data[7] = (uint8_t)(_ctx->key->data_len); |
|
memcpy( data + OAES_BLOCK_SIZE, _ctx->key->data, _ctx->key->data_len ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_key_export_data( OAES_CTX * ctx, |
|
uint8_t * data, size_t * data_len ) |
|
{ |
|
size_t _data_len_in; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
if( NULL == data_len ) |
|
return OAES_RET_ARG3; |
|
|
|
_data_len_in = *data_len; |
|
*data_len = _ctx->key->data_len; |
|
|
|
if( NULL == data ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( _data_len_in < *data_len ) |
|
return OAES_RET_BUF; |
|
|
|
memcpy( data, _ctx->key->data, *data_len ); |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_key_import( OAES_CTX * ctx, |
|
const uint8_t * data, size_t data_len ) |
|
{ |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
OAES_RET _rc = OAES_RET_SUCCESS; |
|
int _key_length; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == data ) |
|
return OAES_RET_ARG2; |
|
|
|
switch( data_len ) |
|
{ |
|
case 16 + OAES_BLOCK_SIZE: |
|
case 24 + OAES_BLOCK_SIZE: |
|
case 32 + OAES_BLOCK_SIZE: |
|
break; |
|
default: |
|
return OAES_RET_ARG3; |
|
} |
|
|
|
// header |
|
if( 0 != memcmp( data, oaes_header, 4 ) ) |
|
return OAES_RET_HEADER; |
|
|
|
// header version |
|
switch( data[4] ) |
|
{ |
|
case 0x01: |
|
break; |
|
default: |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
// header type |
|
switch( data[5] ) |
|
{ |
|
case 0x01: |
|
break; |
|
default: |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
// options |
|
_key_length = data[7]; |
|
switch( _key_length ) |
|
{ |
|
case 16: |
|
case 24: |
|
case 32: |
|
break; |
|
default: |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
if( (int)data_len != _key_length + OAES_BLOCK_SIZE ) |
|
return OAES_RET_ARG3; |
|
|
|
if( _ctx->key ) |
|
oaes_key_destroy( &(_ctx->key) ); |
|
|
|
_ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_MEM; |
|
|
|
_ctx->key->data_len = _key_length; |
|
_ctx->key->data = (uint8_t *) |
|
calloc( _key_length, sizeof( uint8_t )); |
|
|
|
if( NULL == _ctx->key->data ) |
|
{ |
|
oaes_key_destroy( &(_ctx->key) ); |
|
return OAES_RET_MEM; |
|
} |
|
|
|
memcpy( _ctx->key->data, data + OAES_BLOCK_SIZE, _key_length ); |
|
_rc = _rc ? _rc : oaes_key_expand( ctx ); |
|
|
|
if( _rc != OAES_RET_SUCCESS ) |
|
{ |
|
oaes_key_destroy( &(_ctx->key) ); |
|
return _rc; |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_key_import_data( OAES_CTX * ctx, |
|
const uint8_t * data, size_t data_len ) |
|
{ |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
OAES_RET _rc = OAES_RET_SUCCESS; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == data ) |
|
return OAES_RET_ARG2; |
|
|
|
switch( data_len ) |
|
{ |
|
case 16: |
|
case 24: |
|
case 32: |
|
break; |
|
default: |
|
return OAES_RET_ARG3; |
|
} |
|
|
|
if( _ctx->key ) |
|
oaes_key_destroy( &(_ctx->key) ); |
|
|
|
_ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_MEM; |
|
|
|
_ctx->key->data_len = data_len; |
|
_ctx->key->data = (uint8_t *) |
|
calloc( data_len, sizeof( uint8_t )); |
|
|
|
if( NULL == _ctx->key->data ) |
|
{ |
|
oaes_key_destroy( &(_ctx->key) ); |
|
return OAES_RET_MEM; |
|
} |
|
|
|
memcpy( _ctx->key->data, data, data_len ); |
|
_rc = _rc ? _rc : oaes_key_expand( ctx ); |
|
|
|
if( _rc != OAES_RET_SUCCESS ) |
|
{ |
|
oaes_key_destroy( &(_ctx->key) ); |
|
return _rc; |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_CTX * oaes_alloc(void) |
|
{ |
|
oaes_ctx * _ctx = (oaes_ctx *) calloc(sizeof(oaes_ctx), 1); |
|
if(!_ctx) |
|
return NULL; |
|
|
|
#ifdef OAES_HAVE_ISAAC |
|
{ |
|
ub4 _i = 0; |
|
char _seed[RANDSIZ + 1]; |
|
|
|
_ctx->rctx = (randctx *) calloc(sizeof(randctx), 1); |
|
if(!_ctx->rctx) { |
|
free(_ctx); |
|
return NULL; |
|
} |
|
|
|
oaes_get_seed( _seed ); |
|
memset( _ctx->rctx->randrsl, 0, RANDSIZ ); |
|
memcpy( _ctx->rctx->randrsl, _seed, RANDSIZ ); |
|
randinit( _ctx->rctx, TRUE); |
|
} |
|
#else |
|
srand( oaes_get_seed() ); |
|
#endif // OAES_HAVE_ISAAC |
|
|
|
_ctx->key = NULL; |
|
oaes_set_option( _ctx, OAES_OPTION_CBC, NULL ); |
|
|
|
#ifdef OAES_DEBUG |
|
_ctx->step_cb = NULL; |
|
oaes_set_option( _ctx, OAES_OPTION_STEP_OFF, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
return (OAES_CTX *) _ctx; |
|
} |
|
|
|
OAES_RET oaes_free(OAES_CTX ** ctx) |
|
{ |
|
oaes_ctx ** _ctx = (oaes_ctx **) ctx; |
|
|
|
if(!_ctx) |
|
return OAES_RET_ARG1; |
|
|
|
if(!*_ctx) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( (*_ctx)->key ) |
|
oaes_key_destroy( &((*_ctx)->key) ); |
|
|
|
#ifdef OAES_HAVE_ISAAC |
|
if( (*_ctx)->rctx ) |
|
{ |
|
free( (*_ctx)->rctx ); |
|
(*_ctx)->rctx = NULL; |
|
} |
|
#endif // OAES_HAVE_ISAAC |
|
|
|
free( *_ctx ); |
|
*_ctx = NULL; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_set_option(OAES_CTX * ctx, OAES_OPTION option, const void * value) |
|
{ |
|
size_t _i; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
switch( option ) |
|
{ |
|
case OAES_OPTION_ECB: |
|
_ctx->options &= ~OAES_OPTION_CBC; |
|
memset( _ctx->iv, 0, OAES_BLOCK_SIZE ); |
|
break; |
|
|
|
case OAES_OPTION_CBC: |
|
_ctx->options &= ~OAES_OPTION_ECB; |
|
if( value ) |
|
memcpy( _ctx->iv, value, OAES_BLOCK_SIZE ); |
|
else |
|
{ |
|
for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ ) |
|
#ifdef OAES_HAVE_ISAAC |
|
_ctx->iv[_i] = (uint8_t) rand( _ctx->rctx ); |
|
#else |
|
_ctx->iv[_i] = (uint8_t) rand(); |
|
#endif // OAES_HAVE_ISAAC |
|
} |
|
break; |
|
|
|
#ifdef OAES_DEBUG |
|
|
|
case OAES_OPTION_STEP_ON: |
|
if( value ) |
|
{ |
|
_ctx->options &= ~OAES_OPTION_STEP_OFF; |
|
_ctx->step_cb = value; |
|
} |
|
else |
|
{ |
|
_ctx->options &= ~OAES_OPTION_STEP_ON; |
|
_ctx->options |= OAES_OPTION_STEP_OFF; |
|
_ctx->step_cb = NULL; |
|
return OAES_RET_ARG3; |
|
} |
|
break; |
|
|
|
case OAES_OPTION_STEP_OFF: |
|
_ctx->options &= ~OAES_OPTION_STEP_ON; |
|
_ctx->step_cb = NULL; |
|
break; |
|
|
|
#endif // OAES_DEBUG |
|
|
|
default: |
|
return OAES_RET_ARG2; |
|
} |
|
|
|
_ctx->options |= option; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_encrypt_block(OAES_CTX * ctx, uint8_t * c, size_t c_len) |
|
{ |
|
size_t _i, _j; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == c ) |
|
return OAES_RET_ARG2; |
|
|
|
if( c_len != OAES_BLOCK_SIZE ) |
|
return OAES_RET_ARG3; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "input", 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(State, K0) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
c[_i] = c[_i] ^ _ctx->key->exp_data[_i]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data, "k_sch", 1, NULL ); |
|
_ctx->step_cb( c, "k_add", 1, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
// for round = 1 step 1 to Nr–1 |
|
for( _i = 1; _i < _ctx->key->num_keys - 1; _i++ ) |
|
{ |
|
// SubBytes(state) |
|
for( _j = 0; _j < c_len; _j++ ) |
|
oaes_sub_byte( c + _j ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "s_box", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// ShiftRows(state) |
|
oaes_shift_rows( c ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "s_row", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// MixColumns(state) |
|
oaes_mix_cols( c ); |
|
oaes_mix_cols( c + 4 ); |
|
oaes_mix_cols( c + 8 ); |
|
oaes_mix_cols( c + 12 ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "m_col", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(state, w[round*Nb, (round+1)*Nb-1]) |
|
for( _j = 0; _j < c_len; _j++ ) |
|
c[_j] = c[_j] ^ |
|
_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN, |
|
"k_sch", _i, NULL ); |
|
_ctx->step_cb( c, "k_add", _i, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
} |
|
|
|
// SubBytes(state) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
oaes_sub_byte( c + _i ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "s_box", _ctx->key->num_keys - 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// ShiftRows(state) |
|
oaes_shift_rows( c ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "s_row", _ctx->key->num_keys - 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1]) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
c[_i] = c[_i] ^ _ctx->key->exp_data[ |
|
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data + |
|
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN, |
|
"k_sch", _ctx->key->num_keys - 1, NULL ); |
|
_ctx->step_cb( c, "output", _ctx->key->num_keys - 1, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
static OAES_RET oaes_decrypt_block(OAES_CTX * ctx, uint8_t * c, size_t c_len) |
|
{ |
|
size_t _i, _j; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == c ) |
|
return OAES_RET_ARG2; |
|
|
|
if( c_len != OAES_BLOCK_SIZE ) |
|
return OAES_RET_ARG3; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "iinput", _ctx->key->num_keys - 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1]) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
c[_i] = c[_i] ^ _ctx->key->exp_data[ |
|
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data + |
|
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN, |
|
"ik_sch", _ctx->key->num_keys - 1, NULL ); |
|
_ctx->step_cb( c, "ik_add", _ctx->key->num_keys - 1, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
for( _i = _ctx->key->num_keys - 2; _i > 0; _i-- ) |
|
{ |
|
// InvShiftRows(state) |
|
oaes_inv_shift_rows( c ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "is_row", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// InvSubBytes(state) |
|
for( _j = 0; _j < c_len; _j++ ) |
|
oaes_inv_sub_byte( c + _j ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "is_box", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(state, w[round*Nb, (round+1)*Nb-1]) |
|
for( _j = 0; _j < c_len; _j++ ) |
|
c[_j] = c[_j] ^ |
|
_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN, |
|
"ik_sch", _i, NULL ); |
|
_ctx->step_cb( c, "ik_add", _i, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
// InvMixColums(state) |
|
oaes_inv_mix_cols( c ); |
|
oaes_inv_mix_cols( c + 4 ); |
|
oaes_inv_mix_cols( c + 8 ); |
|
oaes_inv_mix_cols( c + 12 ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "im_col", _i, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
} |
|
|
|
// InvShiftRows(state) |
|
oaes_inv_shift_rows( c ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "is_row", 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// InvSubBytes(state) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
oaes_inv_sub_byte( c + _i ); |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
_ctx->step_cb( c, "is_box", 1, NULL ); |
|
#endif // OAES_DEBUG |
|
|
|
// AddRoundKey(state, w[0, Nb-1]) |
|
for( _i = 0; _i < c_len; _i++ ) |
|
c[_i] = c[_i] ^ _ctx->key->exp_data[_i]; |
|
|
|
#ifdef OAES_DEBUG |
|
if( _ctx->step_cb ) |
|
{ |
|
_ctx->step_cb( _ctx->key->exp_data, "ik_sch", 1, NULL ); |
|
_ctx->step_cb( c, "ioutput", 1, NULL ); |
|
} |
|
#endif // OAES_DEBUG |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_RET oaes_encrypt(OAES_CTX * ctx, const uint8_t * m, size_t m_len, uint8_t * c, size_t * c_len) |
|
{ |
|
size_t _i, _j, _c_len_in, _c_data_len; |
|
size_t _pad_len = m_len % OAES_BLOCK_SIZE == 0 ? |
|
0 : OAES_BLOCK_SIZE - m_len % OAES_BLOCK_SIZE; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
OAES_RET _rc = OAES_RET_SUCCESS; |
|
uint8_t _flags = _pad_len ? OAES_FLAG_PAD : 0; |
|
|
|
if( NULL == _ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == m ) |
|
return OAES_RET_ARG2; |
|
|
|
if( NULL == c_len ) |
|
return OAES_RET_ARG5; |
|
|
|
_c_len_in = *c_len; |
|
// data + pad |
|
_c_data_len = m_len + _pad_len; |
|
// header + iv + data + pad |
|
*c_len = 2 * OAES_BLOCK_SIZE + m_len + _pad_len; |
|
|
|
if( NULL == c ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( _c_len_in < *c_len ) |
|
return OAES_RET_BUF; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
// header |
|
memcpy(c, oaes_header, OAES_BLOCK_SIZE ); |
|
memcpy(c + 6, &_ctx->options, sizeof(_ctx->options)); |
|
memcpy(c + 8, &_flags, sizeof(_flags)); |
|
// iv |
|
memcpy(c + OAES_BLOCK_SIZE, _ctx->iv, OAES_BLOCK_SIZE ); |
|
// data |
|
memcpy(c + 2 * OAES_BLOCK_SIZE, m, m_len ); |
|
|
|
for( _i = 0; _i < _c_data_len; _i += OAES_BLOCK_SIZE ) |
|
{ |
|
uint8_t _block[OAES_BLOCK_SIZE]; |
|
size_t _block_size = min( m_len - _i, OAES_BLOCK_SIZE ); |
|
|
|
memcpy( _block, c + 2 * OAES_BLOCK_SIZE + _i, _block_size ); |
|
|
|
// insert pad |
|
for( _j = 0; _j < OAES_BLOCK_SIZE - _block_size; _j++ ) |
|
_block[ _block_size + _j ] = (uint8_t)_j + 1; |
|
|
|
// CBC |
|
if( _ctx->options & OAES_OPTION_CBC ) |
|
{ |
|
for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ ) |
|
_block[_j] = _block[_j] ^ _ctx->iv[_j]; |
|
} |
|
|
|
_rc = _rc ? _rc : |
|
oaes_encrypt_block( ctx, _block, OAES_BLOCK_SIZE ); |
|
memcpy( c + 2 * OAES_BLOCK_SIZE + _i, _block, OAES_BLOCK_SIZE ); |
|
|
|
if( _ctx->options & OAES_OPTION_CBC ) |
|
memcpy( _ctx->iv, _block, OAES_BLOCK_SIZE ); |
|
} |
|
|
|
return _rc; |
|
} |
|
|
|
OAES_RET oaes_decrypt(OAES_CTX * ctx, const uint8_t * c, size_t c_len, uint8_t * m, size_t * m_len) |
|
{ |
|
size_t _i, _j, _m_len_in; |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
OAES_RET _rc = OAES_RET_SUCCESS; |
|
uint8_t _iv[OAES_BLOCK_SIZE]; |
|
uint8_t _flags; |
|
OAES_OPTION _options; |
|
|
|
if( NULL == ctx ) |
|
return OAES_RET_ARG1; |
|
|
|
if( NULL == c ) |
|
return OAES_RET_ARG2; |
|
|
|
if( c_len % OAES_BLOCK_SIZE ) |
|
return OAES_RET_ARG3; |
|
|
|
if( NULL == m_len ) |
|
return OAES_RET_ARG5; |
|
|
|
_m_len_in = *m_len; |
|
*m_len = c_len - 2 * OAES_BLOCK_SIZE; |
|
|
|
if( NULL == m ) |
|
return OAES_RET_SUCCESS; |
|
|
|
if( _m_len_in < *m_len ) |
|
return OAES_RET_BUF; |
|
|
|
if( NULL == _ctx->key ) |
|
return OAES_RET_NOKEY; |
|
|
|
// header |
|
if( 0 != memcmp( c, oaes_header, 4 ) ) |
|
return OAES_RET_HEADER; |
|
|
|
// header version |
|
switch( c[4] ) |
|
{ |
|
case 0x01: |
|
break; |
|
default: |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
// header type |
|
switch( c[5] ) |
|
{ |
|
case 0x02: |
|
break; |
|
default: |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
// options |
|
memcpy(&_options, c + 6, sizeof(_options)); |
|
// validate that all options are valid |
|
if( _options & ~( |
|
OAES_OPTION_ECB |
|
| OAES_OPTION_CBC |
|
#ifdef OAES_DEBUG |
|
| OAES_OPTION_STEP_ON |
|
| OAES_OPTION_STEP_OFF |
|
#endif // OAES_DEBUG |
|
) ) |
|
return OAES_RET_HEADER; |
|
if( ( _options & OAES_OPTION_ECB ) && |
|
( _options & OAES_OPTION_CBC ) ) |
|
return OAES_RET_HEADER; |
|
if( _options == OAES_OPTION_NONE ) |
|
return OAES_RET_HEADER; |
|
|
|
// flags |
|
memcpy(&_flags, c + 8, sizeof(_flags)); |
|
// validate that all flags are valid |
|
if( _flags & ~( |
|
OAES_FLAG_PAD |
|
) ) |
|
return OAES_RET_HEADER; |
|
|
|
// iv |
|
memcpy( _iv, c + OAES_BLOCK_SIZE, OAES_BLOCK_SIZE); |
|
// data + pad |
|
memcpy( m, c + 2 * OAES_BLOCK_SIZE, *m_len ); |
|
|
|
for( _i = 0; _i < *m_len; _i += OAES_BLOCK_SIZE ) |
|
{ |
|
if( ( _options & OAES_OPTION_CBC ) && _i > 0 ) |
|
memcpy( _iv, c + OAES_BLOCK_SIZE + _i, OAES_BLOCK_SIZE ); |
|
|
|
_rc = _rc ? _rc : |
|
oaes_decrypt_block( ctx, m + _i, min( *m_len - _i, OAES_BLOCK_SIZE ) ); |
|
|
|
// CBC |
|
if( _options & OAES_OPTION_CBC ) |
|
{ |
|
for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ ) |
|
m[ _i + _j ] = m[ _i + _j ] ^ _iv[_j]; |
|
} |
|
} |
|
|
|
// remove pad |
|
if( _flags & OAES_FLAG_PAD ) |
|
{ |
|
int _is_pad = 1; |
|
size_t _temp = (size_t) m[*m_len - 1]; |
|
|
|
if( _temp <= 0x00 || _temp > 0x0f ) |
|
return OAES_RET_HEADER; |
|
for( _i = 0; _i < _temp; _i++ ) |
|
if( m[*m_len - 1 - _i] != _temp - _i ) |
|
_is_pad = 0; |
|
if( _is_pad ) |
|
{ |
|
memset( m + *m_len - _temp, 0, _temp ); |
|
*m_len -= _temp; |
|
} |
|
else |
|
return OAES_RET_HEADER; |
|
} |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_API OAES_RET oaes_encryption_round(const uint8_t * key, uint8_t * c) |
|
{ |
|
size_t _i; |
|
|
|
if(!key) |
|
return OAES_RET_ARG1; |
|
|
|
if(!c) |
|
return OAES_RET_ARG2; |
|
|
|
// SubBytes(state) |
|
for(_i = 0; _i < OAES_BLOCK_SIZE; _i++) |
|
oaes_sub_byte( c + _i ); |
|
|
|
// ShiftRows(state) |
|
oaes_shift_rows( c ); |
|
|
|
// MixColumns(state) |
|
oaes_mix_cols( c ); |
|
oaes_mix_cols( c + 4 ); |
|
oaes_mix_cols( c + 8 ); |
|
oaes_mix_cols( c + 12 ); |
|
|
|
// AddRoundKey(State, key) |
|
for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ ) |
|
c[_i] ^= key[_i]; |
|
|
|
return OAES_RET_SUCCESS; |
|
} |
|
|
|
OAES_API OAES_RET oaes_pseudo_encrypt_ecb(OAES_CTX * ctx, uint8_t * c) |
|
{ |
|
oaes_ctx * _ctx = (oaes_ctx *) ctx; |
|
size_t _i; |
|
|
|
if(!_ctx) |
|
return OAES_RET_ARG1; |
|
|
|
if(!c) |
|
return OAES_RET_ARG2; |
|
|
|
if(!_ctx->key) |
|
return OAES_RET_NOKEY; |
|
|
|
for (_i = 0; _i < 10; _i++) |
|
oaes_encryption_round(&_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN], c); |
|
|
|
return OAES_RET_SUCCESS; |
|
}
|
|
|