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Diffstat (limited to 'scripts/conf-w32brg/rijndael2.c')
| -rw-r--r-- | scripts/conf-w32brg/rijndael2.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/scripts/conf-w32brg/rijndael2.c b/scripts/conf-w32brg/rijndael2.c new file mode 100644 index 000000000..421f993b2 --- /dev/null +++ b/scripts/conf-w32brg/rijndael2.c @@ -0,0 +1,279 @@ +/* Rijndael (AES) for GnuPG + * Copyright (C) 2000, 2001 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * GnuPG is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + ******************************************************************* + A version of rijndael.c modified by Brian Gladman to use his AES code + */ + +#include <stdlib.h> +#include <string.h> /* for memcmp() */ + +#include "util.h" + +#include "aes.h" + +typedef struct +{ aes_encrypt_ctx ectx[1]; + aes_decrypt_ctx dctx[1]; + unsigned int klen; + unsigned int dkey; +} RIJNDAEL_context; + +static const char *selftest(void); +static int tested = 0; + +static void +burn_stack (int bytes) +{ + char buf[64]; + + wipememory(buf,sizeof buf); + bytes -= sizeof buf; + if (bytes > 0) + burn_stack (bytes); +} + +static int +rijndael_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen) +{ int rc; + + if(!tested) + { const char *tr; + tested = 1; + tr = selftest(); + if(tr) + { + fprintf(stderr, "%s\n", tr ); + return G10ERR_SELFTEST_FAILED; + } + } + + ctx->klen = keylen; + ctx->dkey = 0; + rc = 0; + if(keylen == 16 || keylen == 24 || keylen == 32) + aes_encrypt_key(key, keylen, ctx->ectx); + else + rc = 1; + burn_stack ( 100 + 16*sizeof(int)); + return rc; +} + +static void +rijndael_encrypt (const RIJNDAEL_context *ctx, byte *b, const byte *a) +{ + aes_encrypt(a, b, ctx->ectx); + burn_stack (16 + 2*sizeof(int)); +} + +static void +rijndael_decrypt (RIJNDAEL_context *ctx, byte *b, const byte *a) +{ + if(!(ctx->dkey)) + { + aes_decrypt_key((byte*)ctx->ectx, ctx->klen, ctx->dctx); + ctx->dkey = 1; + } + aes_decrypt(a, b, ctx->dctx); + burn_stack (16+2*sizeof(int)); +} + +/* Test a single encryption and decryption with each key size. */ + +static const char* +selftest (void) +{ + RIJNDAEL_context ctx; + byte scratch[16]; + + /* The test vectors are from the AES supplied ones; more or less + * randomly taken from ecb_tbl.txt (I=42,81,14) + */ + static const byte plaintext[16] = { + 0x01,0x4B,0xAF,0x22,0x78,0xA6,0x9D,0x33, + 0x1D,0x51,0x80,0x10,0x36,0x43,0xE9,0x9A + }; + static const byte key[16] = { + 0xE8,0xE9,0xEA,0xEB,0xED,0xEE,0xEF,0xF0, + 0xF2,0xF3,0xF4,0xF5,0xF7,0xF8,0xF9,0xFA + }; + static const byte ciphertext[16] = { + 0x67,0x43,0xC3,0xD1,0x51,0x9A,0xB4,0xF2, + 0xCD,0x9A,0x78,0xAB,0x09,0xA5,0x11,0xBD + }; + + static const byte plaintext_192[16] = { + 0x76,0x77,0x74,0x75,0xF1,0xF2,0xF3,0xF4, + 0xF8,0xF9,0xE6,0xE7,0x77,0x70,0x71,0x72 + }; + static const byte key_192[24] = { + 0x04,0x05,0x06,0x07,0x09,0x0A,0x0B,0x0C, + 0x0E,0x0F,0x10,0x11,0x13,0x14,0x15,0x16, + 0x18,0x19,0x1A,0x1B,0x1D,0x1E,0x1F,0x20 + }; + static const byte ciphertext_192[16] = { + 0x5D,0x1E,0xF2,0x0D,0xCE,0xD6,0xBC,0xBC, + 0x12,0x13,0x1A,0xC7,0xC5,0x47,0x88,0xAA + }; + + static const byte plaintext_256[16] = { + 0x06,0x9A,0x00,0x7F,0xC7,0x6A,0x45,0x9F, + 0x98,0xBA,0xF9,0x17,0xFE,0xDF,0x95,0x21 + }; + static const byte key_256[32] = { + 0x08,0x09,0x0A,0x0B,0x0D,0x0E,0x0F,0x10, + 0x12,0x13,0x14,0x15,0x17,0x18,0x19,0x1A, + 0x1C,0x1D,0x1E,0x1F,0x21,0x22,0x23,0x24, + 0x26,0x27,0x28,0x29,0x2B,0x2C,0x2D,0x2E + }; + static const byte ciphertext_256[16] = { + 0x08,0x0E,0x95,0x17,0xEB,0x16,0x77,0x71, + 0x9A,0xCF,0x72,0x80,0x86,0x04,0x0A,0xE3 + }; + + rijndael_setkey (&ctx, key, sizeof(key)); + rijndael_encrypt (&ctx, scratch, plaintext); + if (memcmp (scratch, ciphertext, sizeof (ciphertext))) + return "Rijndael-128 test encryption failed."; + rijndael_decrypt (&ctx, scratch, scratch); + if (memcmp (scratch, plaintext, sizeof (plaintext))) + return "Rijndael-128 test decryption failed."; + + rijndael_setkey (&ctx, key_192, sizeof(key_192)); + rijndael_encrypt (&ctx, scratch, plaintext_192); + if (memcmp (scratch, ciphertext_192, sizeof (ciphertext_192))) + return "Rijndael-192 test encryption failed."; + rijndael_decrypt (&ctx, scratch, scratch); + if (memcmp (scratch, plaintext_192, sizeof (plaintext_192))) + return "Rijndael-192 test decryption failed."; + + rijndael_setkey (&ctx, key_256, sizeof(key_256)); + rijndael_encrypt (&ctx, scratch, plaintext_256); + if (memcmp (scratch, ciphertext_256, sizeof (ciphertext_256))) + return "Rijndael-256 test encryption failed."; + rijndael_decrypt (&ctx, scratch, scratch); + if (memcmp (scratch, plaintext_256, sizeof (plaintext_256))) + return "Rijndael-256 test decryption failed."; + + return NULL; +} + +#ifdef IS_MODULE +static +#endif + const char * + rijndael_get_info (int algo, size_t *keylen, + size_t *blocksize, size_t *contextsize, + int (**r_setkey) (void *c, byte *key, unsigned keylen), + void (**r_encrypt) (void *c, byte *outbuf, byte *inbuf), + void (**r_decrypt) (void *c, byte *outbuf, byte *inbuf) + ) +{ + *keylen = algo==7? 128 : algo==8? 192 : 256; + *blocksize = 16; + *contextsize = sizeof (RIJNDAEL_context); + + *(int (**)(RIJNDAEL_context*, const byte*, const unsigned))r_setkey + = rijndael_setkey; + *(void (**)(const RIJNDAEL_context*, byte*, const byte*))r_encrypt + = rijndael_encrypt; + *(void (**)(RIJNDAEL_context*, byte*, const byte*))r_decrypt + = rijndael_decrypt; + + if( algo == 7 ) + return "AES"; + if (algo == 8) + return "AES192"; + if (algo == 9) + return "AES256"; + return NULL; +} + + +#ifdef IS_MODULE +static +const char * const gnupgext_version = "RIJNDAEL ($Revision$)"; + +static struct { + int class; + int version; + int value; + void (*func)(void); +} func_table[] = { + { 20, 1, 0, (void*)rijndael_get_info }, + { 21, 1, 7 }, + { 21, 1, 8 }, + { 21, 1, 9 }, +}; + + + +/**************** + * Enumerate the names of the functions together with information about + * this function. Set sequence to an integer with a initial value of 0 and + * do not change it. + * If what is 0 all kind of functions are returned. + * Return values: class := class of function: + * 10 = message digest algorithm info function + * 11 = integer with available md algorithms + * 20 = cipher algorithm info function + * 21 = integer with available cipher algorithms + * 30 = public key algorithm info function + * 31 = integer with available pubkey algorithms + * version = interface version of the function/pointer + * (currently this is 1 for all functions) + */ +static +void * +gnupgext_enum_func ( int what, int *sequence, int *class, int *vers ) +{ + void *ret; + int i = *sequence; + + do { + if ( i >= DIM(func_table) || i < 0 ) { + return NULL; + } + *class = func_table[i].class; + *vers = func_table[i].version; + switch( *class ) { + case 11: + case 21: + case 31: + ret = &func_table[i].value; + break; + default: + ret = func_table[i].func; + break; + } + i++; + } while ( what && what != *class ); + + *sequence = i; + return ret; +} +#endif + + + + + + + + + |