diff options
Diffstat (limited to 'openaes/src')
| -rw-r--r-- | openaes/src/ftime.c | 52 | ||||
| -rw-r--r-- | openaes/src/ftime.h | 37 | ||||
| -rw-r--r-- | openaes/src/isaac/rand.c | 137 | ||||
| -rw-r--r-- | openaes/src/isaac/rand.h | 56 | ||||
| -rw-r--r-- | openaes/src/isaac/standard.h | 57 | ||||
| -rw-r--r-- | openaes/src/oaes.c | 317 | ||||
| -rw-r--r-- | openaes/src/oaes_lib.c | 1431 |
7 files changed, 2087 insertions, 0 deletions
diff --git a/openaes/src/ftime.c b/openaes/src/ftime.c new file mode 100644 index 000000000..d918209da --- /dev/null +++ b/openaes/src/ftime.c @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2013 The Android Open Source 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: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS 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 + * COPYRIGHT OWNER OR 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 <time.h> +#include "ftime.h" + +// This was removed from POSIX 2008. +int ftime(struct timeb* tb) { + struct timeval tv; + struct timezone tz; + + if (gettimeofday(&tv, &tz) < 0) + return -1; + + tb->time = tv.tv_sec; + tb->millitm = (tv.tv_usec + 500) / 1000; + + if (tb->millitm == 1000) { + ++tb->time; + tb->millitm = 0; + } + + tb->timezone = tz.tz_minuteswest; + tb->dstflag = tz.tz_dsttime; + + return 0; +} diff --git a/openaes/src/ftime.h b/openaes/src/ftime.h new file mode 100644 index 000000000..80fbab769 --- /dev/null +++ b/openaes/src/ftime.h @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2013 The Android Open Source 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: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS 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 + * COPYRIGHT OWNER OR 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. + */ + +// Only used by ftime, which was removed from POSIX 2008. +struct timeb { + time_t time; + unsigned short millitm; + short timezone; + short dstflag; +}; + +int ftime(struct timeb* tb); diff --git a/openaes/src/isaac/rand.c b/openaes/src/isaac/rand.c new file mode 100644 index 000000000..63babc721 --- /dev/null +++ b/openaes/src/isaac/rand.c @@ -0,0 +1,137 @@ +/* +------------------------------------------------------------------------------ +rand.c: By Bob Jenkins. My random number generator, ISAAC. Public Domain. +MODIFIED: + 960327: Creation (addition of randinit, really) + 970719: use context, not global variables, for internal state + 980324: added main (ifdef'ed out), also rearranged randinit() + 010626: Note that this is public domain +------------------------------------------------------------------------------ +*/ +#ifndef STANDARD +#include "standard.h" +#endif +#ifndef RAND +#include "rand.h" +#endif + + +#define ind(mm,x) (*(ub4 *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<2)))) +#define rngstep(mix,a,b,mm,m,m2,r,x) \ +{ \ + x = *m; \ + a = (a^(mix)) + *(m2++); \ + *(m++) = y = ind(mm,x) + a + b; \ + *(r++) = b = ind(mm,y>>RANDSIZL) + x; \ +} + +void isaac(ctx) +randctx *ctx; +{ + register ub4 a,b,x,y,*m,*mm,*m2,*r,*mend; + mm=ctx->randmem; r=ctx->randrsl; + a = ctx->randa; b = ctx->randb + (++ctx->randc); + for (m = mm, mend = m2 = m+(RANDSIZ/2); m<mend; ) + { + rngstep( a<<13, a, b, mm, m, m2, r, x); + rngstep( a>>6 , a, b, mm, m, m2, r, x); + rngstep( a<<2 , a, b, mm, m, m2, r, x); + rngstep( a>>16, a, b, mm, m, m2, r, x); + } + for (m2 = mm; m2<mend; ) + { + rngstep( a<<13, a, b, mm, m, m2, r, x); + rngstep( a>>6 , a, b, mm, m, m2, r, x); + rngstep( a<<2 , a, b, mm, m, m2, r, x); + rngstep( a>>16, a, b, mm, m, m2, r, x); + } + ctx->randb = b; ctx->randa = a; +} + + +#define mix(a,b,c,d,e,f,g,h) \ +{ \ + a^=b<<11; d+=a; b+=c; \ + b^=c>>2; e+=b; c+=d; \ + c^=d<<8; f+=c; d+=e; \ + d^=e>>16; g+=d; e+=f; \ + e^=f<<10; h+=e; f+=g; \ + f^=g>>4; a+=f; g+=h; \ + g^=h<<8; b+=g; h+=a; \ + h^=a>>9; c+=h; a+=b; \ +} + +/* if (flag==TRUE), then use the contents of randrsl[] to initialize mm[]. */ +void randinit(ctx, flag) +randctx *ctx; +word flag; +{ + word i; + ub4 a,b,c,d,e,f,g,h; + ub4 *m,*r; + ctx->randa = ctx->randb = ctx->randc = 0; + m=ctx->randmem; + r=ctx->randrsl; + a=b=c=d=e=f=g=h=0x9e3779b9; /* the golden ratio */ + + for (i=0; i<4; ++i) /* scramble it */ + { + mix(a,b,c,d,e,f,g,h); + } + + if (flag) + { + /* initialize using the contents of r[] as the seed */ + for (i=0; i<RANDSIZ; i+=8) + { + a+=r[i ]; b+=r[i+1]; c+=r[i+2]; d+=r[i+3]; + e+=r[i+4]; f+=r[i+5]; g+=r[i+6]; h+=r[i+7]; + mix(a,b,c,d,e,f,g,h); + m[i ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d; + m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h; + } + /* do a second pass to make all of the seed affect all of m */ + for (i=0; i<RANDSIZ; i+=8) + { + a+=m[i ]; b+=m[i+1]; c+=m[i+2]; d+=m[i+3]; + e+=m[i+4]; f+=m[i+5]; g+=m[i+6]; h+=m[i+7]; + mix(a,b,c,d,e,f,g,h); + m[i ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d; + m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h; + } + } + else + { + /* fill in m[] with messy stuff */ + for (i=0; i<RANDSIZ; i+=8) + { + mix(a,b,c,d,e,f,g,h); + m[i ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d; + m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h; + } + } + + isaac(ctx); /* fill in the first set of results */ + ctx->randcnt=RANDSIZ; /* prepare to use the first set of results */ +} + + +#ifdef NEVER +int main() +{ + ub4 i,j; + randctx ctx; + ctx.randa=ctx.randb=ctx.randc=(ub4)0; + for (i=0; i<256; ++i) ctx.randrsl[i]=(ub4)0; + randinit(&ctx, TRUE); + for (i=0; i<2; ++i) + { + isaac(&ctx); + for (j=0; j<256; ++j) + { + printf("%.8lx",ctx.randrsl[j]); + if ((j&7)==7) printf("\n"); + } + } +} +#endif diff --git a/openaes/src/isaac/rand.h b/openaes/src/isaac/rand.h new file mode 100644 index 000000000..73f6e3e44 --- /dev/null +++ b/openaes/src/isaac/rand.h @@ -0,0 +1,56 @@ +/* +------------------------------------------------------------------------------ +rand.h: definitions for a random number generator +By Bob Jenkins, 1996, Public Domain +MODIFIED: + 960327: Creation (addition of randinit, really) + 970719: use context, not global variables, for internal state + 980324: renamed seed to flag + 980605: recommend RANDSIZL=4 for noncryptography. + 010626: note this is public domain +------------------------------------------------------------------------------ +*/ +#ifndef STANDARD +#include "standard.h" +#endif + +#ifndef RAND +#define RAND +#define RANDSIZL (8) +#define RANDSIZ (1<<RANDSIZL) + +/* context of random number generator */ +struct randctx +{ + ub4 randcnt; + ub4 randrsl[RANDSIZ]; + ub4 randmem[RANDSIZ]; + ub4 randa; + ub4 randb; + ub4 randc; +}; +typedef struct randctx randctx; + +/* +------------------------------------------------------------------------------ + If (flag==TRUE), then use the contents of randrsl[0..RANDSIZ-1] as the seed. +------------------------------------------------------------------------------ +*/ +void randinit(/*_ randctx *r, word flag _*/); + +void isaac(/*_ randctx *r _*/); + + +/* +------------------------------------------------------------------------------ + Call rand(/o_ randctx *r _o/) to retrieve a single 32-bit random value +------------------------------------------------------------------------------ +*/ +#define rand(r) \ + (!(r)->randcnt-- ? \ + (isaac(r), (r)->randcnt=RANDSIZ-1, (r)->randrsl[(r)->randcnt]) : \ + (r)->randrsl[(r)->randcnt]) + +#endif /* RAND */ + + diff --git a/openaes/src/isaac/standard.h b/openaes/src/isaac/standard.h new file mode 100644 index 000000000..202a5d658 --- /dev/null +++ b/openaes/src/isaac/standard.h @@ -0,0 +1,57 @@ +/* +------------------------------------------------------------------------------ +Standard definitions and types, Bob Jenkins +------------------------------------------------------------------------------ +*/ +#ifndef STANDARD +# define STANDARD +# ifndef STDIO +# include <stdio.h> +# define STDIO +# endif +# ifndef STDDEF +# include <stddef.h> +# define STDDEF +# endif +typedef unsigned long long ub8; +#define UB8MAXVAL 0xffffffffffffffffLL +#define UB8BITS 64 +typedef signed long long sb8; +#define SB8MAXVAL 0x7fffffffffffffffLL +typedef unsigned long int ub4; /* unsigned 4-byte quantities */ +#define UB4MAXVAL 0xffffffff +typedef signed long int sb4; +#define UB4BITS 32 +#define SB4MAXVAL 0x7fffffff +typedef unsigned short int ub2; +#define UB2MAXVAL 0xffff +#define UB2BITS 16 +typedef signed short int sb2; +#define SB2MAXVAL 0x7fff +typedef unsigned char ub1; +#define UB1MAXVAL 0xff +#define UB1BITS 8 +typedef signed char sb1; /* signed 1-byte quantities */ +#define SB1MAXVAL 0x7f +typedef int word; /* fastest type available */ + +#define bis(target,mask) ((target) |= (mask)) +#define bic(target,mask) ((target) &= ~(mask)) +#define bit(target,mask) ((target) & (mask)) +#ifndef min +# define min(a,b) (((a)<(b)) ? (a) : (b)) +#endif /* min */ +#ifndef max +# define max(a,b) (((a)<(b)) ? (b) : (a)) +#endif /* max */ +#ifndef align +# define align(a) (((ub4)a+(sizeof(void *)-1))&(~(sizeof(void *)-1))) +#endif /* align */ +#ifndef abs +# define abs(a) (((a)>0) ? (a) : -(a)) +#endif +#define TRUE 1 +#define FALSE 0 +#define SUCCESS 0 /* 1 on VAX */ + +#endif /* STANDARD */ diff --git a/openaes/src/oaes.c b/openaes/src/oaes.c new file mode 100644 index 000000000..9a5d26849 --- /dev/null +++ b/openaes/src/oaes.c @@ -0,0 +1,317 @@ +/* + * --------------------------------------------------------------------------- + * OpenAES License + * --------------------------------------------------------------------------- + * Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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 <stdio.h> +#include <stdlib.h> +#include <string.h> + +#define OAES_DEBUG 1 +#include "../inc/oaes_lib.h" + +#if defined(_WIN32) && !defined(__SYMBIAN32__) +#include <io.h> +#else +__inline static int setmode(int a, int b) +{ + return 0; +} +#endif + +#ifndef __max + #define __max(a,b) (((a) > (b)) ? (a) : (b)) +#endif // __max + +#ifndef __min + #define __min(a,b) (((a) < (b)) ? (a) : (b)) +#endif // __min + +#define OAES_BUF_LEN_ENC 4096 - 2 * OAES_BLOCK_SIZE +#define OAES_BUF_LEN_DEC 4096 + +static void usage( const char * exe_name ) +{ + if( NULL == exe_name ) + return; + + fprintf( stderr, + "Usage:\n" + " %s <command> --key <key_data> [options]\n" + "\n" + " command:\n" + " enc: encrypt\n" + " dec: decrypt\n" + "\n" + " options:\n" + " --ecb: use ecb mode instead of cbc\n" + " --in <path_in>\n" + " --out <path_out>\n" + "\n", + exe_name + ); +} + +int main(int argc, char** argv) +{ + size_t _i = 0, _j = 0; + OAES_CTX * ctx = NULL; + uint8_t _buf_in[OAES_BUF_LEN_DEC]; + uint8_t *_buf_out = NULL, _key_data[32] = ""; + size_t _buf_in_len = 0, _buf_out_len = 0, _read_len = 0; + size_t _key_data_len = 0; + short _is_ecb = 0; + char *_file_in = NULL, *_file_out = NULL; + int _op = 0; + FILE *_f_in = stdin, *_f_out = stdout; + + fprintf( stderr, "\n" + "*******************************************************************************\n" + "* OpenAES %-10s *\n" + "* Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com *\n" + "*******************************************************************************\n\n", + OAES_VERSION ); + + // pad the key + for( _j = 0; _j < 32; _j++ ) + _key_data[_j] = _j + 1; + + if( argc < 2 ) + { + usage( argv[0] ); + return EXIT_FAILURE; + } + + if( 0 == strcmp( argv[1], "enc" ) ) + { + _op = 0; + _read_len = OAES_BUF_LEN_ENC; + } + else if( 0 == strcmp( argv[1], "dec" ) ) + { + _op = 1; + _read_len = OAES_BUF_LEN_DEC; + } + else + { + fprintf(stderr, "Error: Unknown command '%s'.", argv[1]); + usage( argv[0] ); + return EXIT_FAILURE; + } + + for( _i = 2; _i < argc; _i++ ) + { + int _found = 0; + + if( 0 == strcmp( argv[_i], "--ecb" ) ) + { + _found = 1; + _is_ecb = 1; + } + + if( 0 == strcmp( argv[_i], "--key" ) ) + { + _found = 1; + _i++; // key_data + if( _i >= argc ) + { + fprintf(stderr, "Error: No value specified for '%s'.\n", + "--key"); + usage( argv[0] ); + return EXIT_FAILURE; + } + _key_data_len = strlen(argv[_i]); + if( 16 >= _key_data_len ) + _key_data_len = 16; + else if( 24 >= _key_data_len ) + _key_data_len = 24; + else + _key_data_len = 32; + memcpy(_key_data, argv[_i], __min(32, strlen(argv[_i]))); + } + + if( 0 == strcmp( argv[_i], "--in" ) ) + { + _found = 1; + _i++; // path_in + if( _i >= argc ) + { + fprintf(stderr, "Error: No value specified for '%s'.\n", + "--in"); + usage( argv[0] ); + return EXIT_FAILURE; + } + _file_in = argv[_i]; + } + + if( 0 == strcmp( argv[_i], "--out" ) ) + { + _found = 1; + _i++; // path_out + if( _i >= argc ) + { + fprintf(stderr, "Error: No value specified for '%s'.\n", + "--out"); + usage( argv[0] ); + return EXIT_FAILURE; + } + _file_out = argv[_i]; + } + + if( 0 == _found ) + { + fprintf(stderr, "Error: Invalid option '%s'.\n", argv[_i]); + usage( argv[0] ); + return EXIT_FAILURE; + } + } + + if( 0 == _key_data_len ) + { + fprintf(stderr, "Error: --key must be specified.\n"); + return EXIT_FAILURE; + } + + if( _file_in ) + { + _f_in = fopen(_file_in, "rb"); + if( NULL == _f_in ) + { + fprintf(stderr, + "Error: Failed to open '-%s' for reading.\n", _file_in); + return EXIT_FAILURE; + } + } + else + { + if( setmode(fileno(stdin), 0x8000) < 0 ) + fprintf(stderr,"Error: Failed in setmode().\n"); + _f_in = stdin; + } + + if( _file_out ) + { + _f_out = fopen(_file_out, "wb"); + if( NULL == _f_out ) + { + fprintf(stderr, + "Error: Failed to open '-%s' for writing.\n", _file_out); + if( _file_in ) + fclose(_f_in); + return EXIT_FAILURE; + } + } + else + { + if( setmode(fileno(stdout), 0x8000) < 0 ) + fprintf(stderr, "Error: Failed in setmode().\n"); + _f_out = stdout; + } + + ctx = oaes_alloc(); + if( NULL == ctx ) + { + fprintf(stderr, "Error: Failed to initialize OAES.\n"); + if( _file_in ) + fclose(_f_in); + if( _file_out ) + fclose(_f_out); + return EXIT_FAILURE; + } + if( _is_ecb ) + if( OAES_RET_SUCCESS != oaes_set_option( ctx, OAES_OPTION_ECB, NULL ) ) + fprintf(stderr, "Error: Failed to set OAES options.\n"); + + oaes_key_import_data( ctx, _key_data, _key_data_len ); + + while( _buf_in_len = + fread(_buf_in, sizeof(uint8_t), _read_len, _f_in) ) + { + switch(_op) + { + case 0: + if( OAES_RET_SUCCESS != oaes_encrypt( ctx, + _buf_in, _buf_in_len, NULL, &_buf_out_len ) ) + fprintf( stderr, + "Error: Failed to retrieve required buffer size for " + "encryption.\n" ); + _buf_out = (uint8_t *) calloc( _buf_out_len, sizeof( char ) ); + if( NULL == _buf_out ) + { + fprintf(stderr, "Error: Failed to allocate memory.\n" ); + if( _file_in ) + fclose(_f_in); + if( _file_out ) + fclose(_f_out); + return EXIT_FAILURE; + } + if( OAES_RET_SUCCESS != oaes_encrypt( ctx, + _buf_in, _buf_in_len, _buf_out, &_buf_out_len ) ) + fprintf(stderr, "Error: Encryption failed.\n"); + fwrite(_buf_out, sizeof(uint8_t), _buf_out_len, _f_out); + free(_buf_out); + break; + case 1: + if( OAES_RET_SUCCESS != oaes_decrypt( ctx, + _buf_in, _buf_in_len, NULL, &_buf_out_len ) ) + fprintf( stderr, + "Error: Failed to retrieve required buffer size for " + "encryption.\n" ); + _buf_out = (uint8_t *) calloc( _buf_out_len, sizeof( char ) ); + if( NULL == _buf_out ) + { + fprintf(stderr, "Error: Failed to allocate memory.\n" ); + free( _buf_out ); + if( _file_in ) + fclose(_f_in); + if( _file_out ) + fclose(_f_out); + return EXIT_FAILURE; + } + if( OAES_RET_SUCCESS != oaes_decrypt( ctx, + _buf_in, _buf_in_len, _buf_out, &_buf_out_len ) ) + fprintf(stderr, "Error: Decryption failed.\n"); + fwrite(_buf_out, sizeof(uint8_t), _buf_out_len, _f_out); + free(_buf_out); + break; + default: + break; + } + } + + + if( OAES_RET_SUCCESS != oaes_free( &ctx ) ) + fprintf(stderr, "Error: Failed to uninitialize OAES.\n"); + + if( _file_in ) + fclose(_f_in); + if( _file_out ) + fclose(_f_out); + + return (EXIT_SUCCESS); +} diff --git a/openaes/src/oaes_lib.c b/openaes/src/oaes_lib.c new file mode 100644 index 000000000..0cc03946e --- /dev/null +++ b/openaes/src/oaes_lib.c @@ -0,0 +1,1431 @@ +/* + * --------------------------------------------------------------------------- + * OpenAES License + * --------------------------------------------------------------------------- + * Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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. + * --------------------------------------------------------------------------- + */ +static const char _NR[] = { + 0x4e,0x61,0x62,0x69,0x6c,0x20,0x53,0x2e,0x20, + 0x41,0x6c,0x20,0x52,0x61,0x6d,0x6c,0x69,0x00 }; + +#include <stddef.h> +#include <time.h> +//#include <sys/timeb.h> +#include "ftime.h" +#include <malloc.h> +#include <string.h> +#include <unistd.h> + +#ifdef WIN32 +#include <process.h> +#endif + +#include "oaes_config.h" +#include "oaes_lib.h" + +#ifdef OAES_HAVE_ISAAC +#include "rand.h" +#endif // OAES_HAVE_ISAAC + +#define OAES_RKEY_LEN 4 +#define OAES_COL_LEN 4 +#define OAES_ROUND_BASE 7 + +// the block is padded +#define OAES_FLAG_PAD 0x01 + +#ifndef min +# define min(a,b) (((a)<(b)) ? (a) : (b)) +#endif /* min */ + +typedef struct _oaes_key +{ + size_t data_len; + uint8_t *data; + size_t exp_data_len; + uint8_t *exp_data; + size_t num_keys; + size_t key_base; +} oaes_key; + +typedef struct _oaes_ctx +{ +#ifdef OAES_HAVE_ISAAC + randctx * rctx; +#endif // OAES_HAVE_ISAAC + +#ifdef OAES_DEBUG + oaes_step_cb step_cb; +#endif // OAES_DEBUG + + oaes_key * key; + OAES_OPTION options; + uint8_t iv[OAES_BLOCK_SIZE]; +} oaes_ctx; + +// "OAES<8-bit header version><8-bit type><16-bit options><8-bit flags><56-bit reserved>" +static uint8_t oaes_header[OAES_BLOCK_SIZE] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x4f, 0x41, 0x45, 0x53, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; +static uint8_t oaes_gf_8[] = { + 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 }; + +static uint8_t oaes_sub_byte_value[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, + /*1*/ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, + /*2*/ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, + /*3*/ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, + /*4*/ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, + /*5*/ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, + /*6*/ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, + /*7*/ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, + /*8*/ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, + /*9*/ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, + /*a*/ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, + /*b*/ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, + /*c*/ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, + /*d*/ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, + /*e*/ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, + /*f*/ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16, +}; + +static uint8_t oaes_inv_sub_byte_value[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, + /*1*/ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, + /*2*/ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, + /*3*/ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, + /*4*/ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, + /*5*/ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, + /*6*/ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, + /*7*/ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, + /*8*/ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, + /*9*/ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, + /*a*/ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, + /*b*/ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, + /*c*/ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, + /*d*/ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, + /*e*/ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, + /*f*/ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d, +}; + +static uint8_t oaes_gf_mul_2[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, + /*1*/ 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, + /*2*/ 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, + /*3*/ 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e, + /*4*/ 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, + /*5*/ 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe, + /*6*/ 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde, + /*7*/ 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, + /*8*/ 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05, + /*9*/ 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25, + /*a*/ 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45, + /*b*/ 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65, + /*c*/ 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85, + /*d*/ 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5, + /*e*/ 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5, + /*f*/ 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5, +}; + +static uint8_t oaes_gf_mul_3[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11, + /*1*/ 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21, + /*2*/ 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71, + /*3*/ 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41, + /*4*/ 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, + /*5*/ 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1, + /*6*/ 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1, + /*7*/ 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81, + /*8*/ 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a, + /*9*/ 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba, + /*a*/ 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea, + /*b*/ 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda, + /*c*/ 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a, + /*d*/ 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a, + /*e*/ 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a, + /*f*/ 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a, +}; + +static uint8_t oaes_gf_mul_9[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*0*/ 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77, + /*1*/ 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7, + /*2*/ 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c, + /*3*/ 0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc, + /*4*/ 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01, + /*5*/ 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91, + /*6*/ 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a, + /*7*/ 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa, + /*8*/ 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b, + /*9*/ 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b, + /*a*/ 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0, + /*b*/ 0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30, + /*c*/ 0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed, + /*d*/ 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d, + /*e*/ 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6, + /*f*/ 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46, +}; + +static uint8_t oaes_gf_mul_b[16][16] = { + // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, + /*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( NULL == byte ) + return OAES_RET_ARG1; + + _x = _y = *byte; + _x &= 0x0f; + _y &= 0xf0; + _y >>= 4; + *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[OAES_BLOCK_SIZE]; + + if( NULL == block ) + return OAES_RET_ARG1; + + _temp[0x00] = block[0x00]; + _temp[0x01] = block[0x05]; + _temp[0x02] = block[0x0a]; + _temp[0x03] = block[0x0f]; + _temp[0x04] = block[0x04]; + _temp[0x05] = block[0x09]; + _temp[0x06] = block[0x0e]; + _temp[0x07] = block[0x03]; + _temp[0x08] = block[0x08]; + _temp[0x09] = block[0x0d]; + _temp[0x0a] = block[0x02]; + _temp[0x0b] = block[0x07]; + _temp[0x0c] = block[0x0c]; + _temp[0x0d] = block[0x01]; + _temp[0x0e] = block[0x06]; + _temp[0x0f] = block[0x0b]; + memcpy( block, _temp, OAES_BLOCK_SIZE ); + + 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; + + _x = _y = left; + _x &= 0x0f; + _y &= 0xf0; + _y >>= 4; + + 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( 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() +{ + 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 = gmTimer->tm_year + 1900 + gmTimer->tm_mon + 1 + gmTimer->tm_mday + + gmTimer->tm_hour + gmTimer->tm_min + gmTimer->tm_sec + timer.millitm + + (uint32_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; + + 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++ ) + { + uint8_t _temp[OAES_COL_LEN]; + + 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 || 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] = _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( 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 || 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 || oaes_key_expand( ctx ); + + if( _rc != OAES_RET_SUCCESS ) + { + oaes_key_destroy( &(_ctx->key) ); + return _rc; + } + + return OAES_RET_SUCCESS; +} + +OAES_CTX * oaes_alloc() +{ + oaes_ctx * _ctx = (oaes_ctx *) calloc( sizeof( oaes_ctx ), 1 ); + + if( NULL == _ctx ) + return NULL; + +#ifdef OAES_HAVE_ISAAC + { + ub4 _i = 0; + char _seed[RANDSIZ + 1]; + + _ctx->rctx = (randctx *) calloc( sizeof( randctx ), 1 ); + + if( NULL == _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( NULL == _ctx ) + return OAES_RET_ARG1; + + if( NULL == *_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 ] = _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 || + 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 || + 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; +} |