From 682f23e7bb4a52bedf46eff5c4859e1308eda124 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Tue, 25 Aug 2015 19:56:24 +0200 Subject: Update build ref --- polarssl/src/library/ctr_drbg.c | 562 ---------------------------------------- 1 file changed, 562 deletions(-) delete mode 100644 polarssl/src/library/ctr_drbg.c (limited to 'polarssl/src/library/ctr_drbg.c') diff --git a/polarssl/src/library/ctr_drbg.c b/polarssl/src/library/ctr_drbg.c deleted file mode 100644 index 1de7f05..0000000 --- a/polarssl/src/library/ctr_drbg.c +++ /dev/null @@ -1,562 +0,0 @@ -/* - * CTR_DRBG implementation based on AES-256 (NIST SP 800-90) - * - * Copyright (C) 2006-2011, Brainspark B.V. - * - * This file is part of PolarSSL (http://www.polarssl.org) - * Lead Maintainer: Paul Bakker - * - * All rights reserved. - * - * This program 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. - * - * This program 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., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ -/* - * The NIST SP 800-90 DRBGs are described in the following publucation. - * - * http://csrc.nist.gov/publications/nistpubs/800-90/SP800-90revised_March2007.pdf - */ - -#include "polarssl/config.h" - -#if defined(POLARSSL_CTR_DRBG_C) - -#include "polarssl/ctr_drbg.h" - -#if defined(POLARSSL_FS_IO) -#include -#endif - -/* - * Non-public function wrapped by ctr_crbg_init(). Necessary to allow NIST - * tests to succeed (which require known length fixed entropy) - */ -int ctr_drbg_init_entropy_len( - ctr_drbg_context *ctx, - int (*f_entropy)(void *, unsigned char *, size_t), - void *p_entropy, - const unsigned char *custom, - size_t len, - size_t entropy_len ) -{ - int ret; - unsigned char key[CTR_DRBG_KEYSIZE]; - - memset( ctx, 0, sizeof(ctr_drbg_context) ); - memset( key, 0, CTR_DRBG_KEYSIZE ); - - ctx->f_entropy = f_entropy; - ctx->p_entropy = p_entropy; - - ctx->entropy_len = entropy_len; - ctx->reseed_interval = CTR_DRBG_RESEED_INTERVAL; - - /* - * Initialize with an empty key - */ - aes_setkey_enc( &ctx->aes_ctx, key, CTR_DRBG_KEYBITS ); - - if( ( ret = ctr_drbg_reseed( ctx, custom, len ) ) != 0 ) - return( ret ); - - return( 0 ); -} - -int ctr_drbg_init( ctr_drbg_context *ctx, - int (*f_entropy)(void *, unsigned char *, size_t), - void *p_entropy, - const unsigned char *custom, - size_t len ) -{ - return( ctr_drbg_init_entropy_len( ctx, f_entropy, p_entropy, custom, len, - CTR_DRBG_ENTROPY_LEN ) ); -} - -void ctr_drbg_set_prediction_resistance( ctr_drbg_context *ctx, int resistance ) -{ - ctx->prediction_resistance = resistance; -} - -void ctr_drbg_set_entropy_len( ctr_drbg_context *ctx, size_t len ) -{ - ctx->entropy_len = len; -} - -void ctr_drbg_set_reseed_interval( ctr_drbg_context *ctx, int interval ) -{ - ctx->reseed_interval = interval; -} - -int block_cipher_df( unsigned char *output, - const unsigned char *data, size_t data_len ) -{ - unsigned char buf[CTR_DRBG_MAX_SEED_INPUT + CTR_DRBG_BLOCKSIZE + 16]; - unsigned char tmp[CTR_DRBG_SEEDLEN]; - unsigned char key[CTR_DRBG_KEYSIZE]; - unsigned char chain[CTR_DRBG_BLOCKSIZE]; - unsigned char *p = buf, *iv; - aes_context aes_ctx; - - int i, j, buf_len, use_len; - - memset( buf, 0, CTR_DRBG_MAX_SEED_INPUT + CTR_DRBG_BLOCKSIZE + 16 ); - - /* - * Construct IV (16 bytes) and S in buffer - * IV = Counter (in 32-bits) padded to 16 with zeroes - * S = Length input string (in 32-bits) || Length of output (in 32-bits) || - * data || 0x80 - * (Total is padded to a multiple of 16-bytes with zeroes) - */ - p = buf + CTR_DRBG_BLOCKSIZE; - *p++ = ( data_len >> 24 ) & 0xff; - *p++ = ( data_len >> 16 ) & 0xff; - *p++ = ( data_len >> 8 ) & 0xff; - *p++ = ( data_len ) & 0xff; - p += 3; - *p++ = CTR_DRBG_SEEDLEN; - memcpy( p, data, data_len ); - p[data_len] = 0x80; - - buf_len = CTR_DRBG_BLOCKSIZE + 8 + data_len + 1; - - for( i = 0; i < CTR_DRBG_KEYSIZE; i++ ) - key[i] = i; - - aes_setkey_enc( &aes_ctx, key, CTR_DRBG_KEYBITS ); - - /* - * Reduce data to POLARSSL_CTR_DRBG_SEEDLEN bytes of data - */ - for( j = 0; j < CTR_DRBG_SEEDLEN; j += CTR_DRBG_BLOCKSIZE ) - { - p = buf; - memset( chain, 0, CTR_DRBG_BLOCKSIZE ); - use_len = buf_len; - - while( use_len > 0 ) - { - for( i = 0; i < CTR_DRBG_BLOCKSIZE; i++ ) - chain[i] ^= p[i]; - p += CTR_DRBG_BLOCKSIZE; - use_len -= CTR_DRBG_BLOCKSIZE; - - aes_crypt_ecb( &aes_ctx, AES_ENCRYPT, chain, chain ); - } - - memcpy( tmp + j, chain, CTR_DRBG_BLOCKSIZE ); - - /* - * Update IV - */ - buf[3]++; - } - - /* - * Do final encryption with reduced data - */ - aes_setkey_enc( &aes_ctx, tmp, CTR_DRBG_KEYBITS ); - iv = tmp + CTR_DRBG_KEYSIZE; - p = output; - - for( j = 0; j < CTR_DRBG_SEEDLEN; j += CTR_DRBG_BLOCKSIZE ) - { - aes_crypt_ecb( &aes_ctx, AES_ENCRYPT, iv, iv ); - memcpy( p, iv, CTR_DRBG_BLOCKSIZE ); - p += CTR_DRBG_BLOCKSIZE; - } - - return( 0 ); -} - -int ctr_drbg_update_internal( ctr_drbg_context *ctx, - const unsigned char data[CTR_DRBG_SEEDLEN] ) -{ - unsigned char tmp[CTR_DRBG_SEEDLEN]; - unsigned char *p = tmp; - int i, j; - - memset( tmp, 0, CTR_DRBG_SEEDLEN ); - - for( j = 0; j < CTR_DRBG_SEEDLEN; j += CTR_DRBG_BLOCKSIZE ) - { - /* - * Increase counter - */ - for( i = CTR_DRBG_BLOCKSIZE; i >= 0; i-- ) - if( ++ctx->counter[i - 1] != 0 ) - break; - - /* - * Crypt counter block - */ - aes_crypt_ecb( &ctx->aes_ctx, AES_ENCRYPT, ctx->counter, p ); - - p += CTR_DRBG_BLOCKSIZE; - } - - for( i = 0; i < CTR_DRBG_SEEDLEN; i++ ) - tmp[i] ^= data[i]; - - /* - * Update key and counter - */ - aes_setkey_enc( &ctx->aes_ctx, tmp, CTR_DRBG_KEYBITS ); - memcpy( ctx->counter, tmp + CTR_DRBG_KEYSIZE, CTR_DRBG_BLOCKSIZE ); - - return( 0 ); -} - -void ctr_drbg_update( ctr_drbg_context *ctx, - const unsigned char *additional, size_t add_len ) -{ - unsigned char add_input[CTR_DRBG_SEEDLEN]; - - if( add_len > 0 ) - { - block_cipher_df( add_input, additional, add_len ); - ctr_drbg_update_internal( ctx, add_input ); - } -} - -int ctr_drbg_reseed( ctr_drbg_context *ctx, - const unsigned char *additional, size_t len ) -{ - unsigned char seed[CTR_DRBG_MAX_SEED_INPUT]; - size_t seedlen = 0; - - if( ctx->entropy_len + len > CTR_DRBG_MAX_SEED_INPUT ) - return( POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG ); - - memset( seed, 0, CTR_DRBG_MAX_SEED_INPUT ); - - /* - * Gather enropy_len bytes of entropy to seed state - */ - if( 0 != ctx->f_entropy( ctx->p_entropy, seed, - ctx->entropy_len ) ) - { - return( POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED ); - } - - seedlen += ctx->entropy_len; - - /* - * Add additional data - */ - if( additional && len ) - { - memcpy( seed + seedlen, additional, len ); - seedlen += len; - } - - /* - * Reduce to 384 bits - */ - block_cipher_df( seed, seed, seedlen ); - - /* - * Update state - */ - ctr_drbg_update_internal( ctx, seed ); - ctx->reseed_counter = 1; - - return( 0 ); -} - -int ctr_drbg_random_with_add( void *p_rng, - unsigned char *output, size_t output_len, - const unsigned char *additional, size_t add_len ) -{ - int ret = 0; - ctr_drbg_context *ctx = (ctr_drbg_context *) p_rng; - unsigned char add_input[CTR_DRBG_SEEDLEN]; - unsigned char *p = output; - unsigned char tmp[CTR_DRBG_BLOCKSIZE]; - int i; - size_t use_len; - - if( output_len > CTR_DRBG_MAX_REQUEST ) - return( POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG ); - - if( add_len > CTR_DRBG_MAX_INPUT ) - return( POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG ); - - memset( add_input, 0, CTR_DRBG_SEEDLEN ); - - if( ctx->reseed_counter > ctx->reseed_interval || - ctx->prediction_resistance ) - { - if( ( ret = ctr_drbg_reseed( ctx, additional, add_len ) ) != 0 ) - return( ret ); - - add_len = 0; - } - - if( add_len > 0 ) - { - block_cipher_df( add_input, additional, add_len ); - ctr_drbg_update_internal( ctx, add_input ); - } - - while( output_len > 0 ) - { - /* - * Increase counter - */ - for( i = CTR_DRBG_BLOCKSIZE; i > 0; i-- ) - if( ++ctx->counter[i - 1] != 0 ) - break; - - /* - * Crypt counter block - */ - aes_crypt_ecb( &ctx->aes_ctx, AES_ENCRYPT, ctx->counter, tmp ); - - use_len = (output_len > CTR_DRBG_BLOCKSIZE ) ? CTR_DRBG_BLOCKSIZE : output_len; - /* - * Copy random block to destination - */ - memcpy( p, tmp, use_len ); - p += use_len; - output_len -= use_len; - } - - ctr_drbg_update_internal( ctx, add_input ); - - ctx->reseed_counter++; - - return( 0 ); -} - -int ctr_drbg_random( void *p_rng, unsigned char *output, size_t output_len ) -{ - return ctr_drbg_random_with_add( p_rng, output, output_len, NULL, 0 ); -} - -#if defined(POLARSSL_FS_IO) -int ctr_drbg_write_seed_file( ctr_drbg_context *ctx, const char *path ) -{ - int ret; - FILE *f; - unsigned char buf[ CTR_DRBG_MAX_INPUT ]; - - if( ( f = fopen( path, "wb" ) ) == NULL ) - return( POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR ); - - if( ( ret = ctr_drbg_random( ctx, buf, CTR_DRBG_MAX_INPUT ) ) != 0 ) - return( ret ); - - if( fwrite( buf, 1, CTR_DRBG_MAX_INPUT, f ) != CTR_DRBG_MAX_INPUT ) - { - fclose( f ); - return( POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR ); - } - - fclose( f ); - return( 0 ); -} - -int ctr_drbg_update_seed_file( ctr_drbg_context *ctx, const char *path ) -{ - FILE *f; - size_t n; - unsigned char buf[ CTR_DRBG_MAX_INPUT ]; - - if( ( f = fopen( path, "rb" ) ) == NULL ) - return( POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR ); - - fseek( f, 0, SEEK_END ); - n = (size_t) ftell( f ); - fseek( f, 0, SEEK_SET ); - - if( n > CTR_DRBG_MAX_INPUT ) - return( POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG ); - - if( fread( buf, 1, n, f ) != n ) - { - fclose( f ); - return( POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR ); - } - - ctr_drbg_update( ctx, buf, n ); - - fclose( f ); - - return( ctr_drbg_write_seed_file( ctx, path ) ); -} -#endif /* POLARSSL_FS_IO */ - -#if defined(POLARSSL_SELF_TEST) - -#include - -unsigned char entropy_source_pr[96] = - { 0xc1, 0x80, 0x81, 0xa6, 0x5d, 0x44, 0x02, 0x16, - 0x19, 0xb3, 0xf1, 0x80, 0xb1, 0xc9, 0x20, 0x02, - 0x6a, 0x54, 0x6f, 0x0c, 0x70, 0x81, 0x49, 0x8b, - 0x6e, 0xa6, 0x62, 0x52, 0x6d, 0x51, 0xb1, 0xcb, - 0x58, 0x3b, 0xfa, 0xd5, 0x37, 0x5f, 0xfb, 0xc9, - 0xff, 0x46, 0xd2, 0x19, 0xc7, 0x22, 0x3e, 0x95, - 0x45, 0x9d, 0x82, 0xe1, 0xe7, 0x22, 0x9f, 0x63, - 0x31, 0x69, 0xd2, 0x6b, 0x57, 0x47, 0x4f, 0xa3, - 0x37, 0xc9, 0x98, 0x1c, 0x0b, 0xfb, 0x91, 0x31, - 0x4d, 0x55, 0xb9, 0xe9, 0x1c, 0x5a, 0x5e, 0xe4, - 0x93, 0x92, 0xcf, 0xc5, 0x23, 0x12, 0xd5, 0x56, - 0x2c, 0x4a, 0x6e, 0xff, 0xdc, 0x10, 0xd0, 0x68 }; - -unsigned char entropy_source_nopr[64] = - { 0x5a, 0x19, 0x4d, 0x5e, 0x2b, 0x31, 0x58, 0x14, - 0x54, 0xde, 0xf6, 0x75, 0xfb, 0x79, 0x58, 0xfe, - 0xc7, 0xdb, 0x87, 0x3e, 0x56, 0x89, 0xfc, 0x9d, - 0x03, 0x21, 0x7c, 0x68, 0xd8, 0x03, 0x38, 0x20, - 0xf9, 0xe6, 0x5e, 0x04, 0xd8, 0x56, 0xf3, 0xa9, - 0xc4, 0x4a, 0x4c, 0xbd, 0xc1, 0xd0, 0x08, 0x46, - 0xf5, 0x98, 0x3d, 0x77, 0x1c, 0x1b, 0x13, 0x7e, - 0x4e, 0x0f, 0x9d, 0x8e, 0xf4, 0x09, 0xf9, 0x2e }; - -unsigned char nonce_pers_pr[16] = - { 0xd2, 0x54, 0xfc, 0xff, 0x02, 0x1e, 0x69, 0xd2, - 0x29, 0xc9, 0xcf, 0xad, 0x85, 0xfa, 0x48, 0x6c }; - -unsigned char nonce_pers_nopr[16] = - { 0x1b, 0x54, 0xb8, 0xff, 0x06, 0x42, 0xbf, 0xf5, - 0x21, 0xf1, 0x5c, 0x1c, 0x0b, 0x66, 0x5f, 0x3f }; - -unsigned char result_pr[16] = - { 0x34, 0x01, 0x16, 0x56, 0xb4, 0x29, 0x00, 0x8f, - 0x35, 0x63, 0xec, 0xb5, 0xf2, 0x59, 0x07, 0x23 }; - -unsigned char result_nopr[16] = - { 0xa0, 0x54, 0x30, 0x3d, 0x8a, 0x7e, 0xa9, 0x88, - 0x9d, 0x90, 0x3e, 0x07, 0x7c, 0x6f, 0x21, 0x8f }; - -int test_offset; -int ctr_drbg_self_test_entropy( void *data, unsigned char *buf, size_t len ) -{ - unsigned char *p = data; - memcpy( buf, p + test_offset, len ); - test_offset += 32; - return( 0 ); -} - -/* - * Checkup routine - */ -int ctr_drbg_self_test( int verbose ) -{ - ctr_drbg_context ctx; - unsigned char buf[16]; - - /* - * Based on a NIST CTR_DRBG test vector (PR = True) - */ - if( verbose != 0 ) - printf( " CTR_DRBG (PR = TRUE) : " ); - - test_offset = 0; - if( ctr_drbg_init_entropy_len( &ctx, ctr_drbg_self_test_entropy, entropy_source_pr, nonce_pers_pr, 16, 32 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - ctr_drbg_set_prediction_resistance( &ctx, CTR_DRBG_PR_ON ); - - if( ctr_drbg_random( &ctx, buf, CTR_DRBG_BLOCKSIZE ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( ctr_drbg_random( &ctx, buf, CTR_DRBG_BLOCKSIZE ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( memcmp( buf, result_pr, CTR_DRBG_BLOCKSIZE ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - printf( "passed\n" ); - - /* - * Based on a NIST CTR_DRBG test vector (PR = FALSE) - */ - if( verbose != 0 ) - printf( " CTR_DRBG (PR = FALSE): " ); - - test_offset = 0; - if( ctr_drbg_init_entropy_len( &ctx, ctr_drbg_self_test_entropy, entropy_source_nopr, nonce_pers_nopr, 16, 32 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( ctr_drbg_random( &ctx, buf, 16 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( ctr_drbg_reseed( &ctx, NULL, 0 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( ctr_drbg_random( &ctx, buf, 16 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( memcmp( buf, result_nopr, 16 ) != 0 ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - printf( "passed\n" ); - - if( verbose != 0 ) - printf( "\n" ); - - return( 0 ); -} -#endif - -#endif -- cgit v1.2.3