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- Added a generic entropy accumulator that provides support for adding custom entropy sources and added some generic and platform dependent entropy sources

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This commit is contained in:
Paul Bakker 2011-12-03 21:45:14 +00:00
parent 1bc9efc00a
commit 6083fd252d
17 changed files with 771 additions and 20 deletions
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3
ChangeLog
View File

@ -11,6 +11,9 @@ Features
* Added cipher_get_cipher_mode() and cipher_get_cipher_operation()
introspection functions (Closes ticket #40)
* Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator
* Added a generic entropy accumulator that provides support for adding
custom entropy sources and added some generic and platform dependent
entropy sources
Changes
* Documentation for AES and Camellia in modes CTR and CFB128 clarified.

9
doxygen/input/doc_rng.h
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@ -7,7 +7,14 @@
* @addtogroup rng_module Random number generator (RNG) module
*
* The Random number generator (RNG) module provides random number
* generation, see \c havege_rand(). It uses the HAVEGE (HArdware Volatile
* generation, see \c ctr_dbrg_random() or \c havege_random().
*
* The former uses the block-cipher counter-mode based deterministic random
* bit generator (CTR_DBRG) as specified in NIST SP800-90. It needs an external
* source of entropy. For these purposes \c entropy_func() can be used. This is
* an implementation based on a simple entropy accumulator design.
*
* The latter random number generator uses the HAVEGE (HArdware Volatile
* Entropy Gathering and Expansion) software heuristic which is claimed
* to be an unpredictable or empirically strong* random number generation.
*

28
include/polarssl/config.h
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@ -154,6 +154,17 @@
*/
#define POLARSSL_FS_IO
/**
* \def POLARSSL_NO_PLATFORM_ENTROPY
*
* Do not use built-in platform entropy functions.
* This is useful if your platform does not support
* standards like the /dev/urandom or Windows CryptoAPI.
*
* Uncomment this macro to disable the built-in platform entropy functions.
#define POLARSSL_NO_PLATFORM_ENTROPY
*/
/**
* \def POLARSSL_PKCS1_V21
*
@ -208,6 +219,7 @@
* Module: library/aes.c
* Caller: library/ssl_tls.c
* library/pem.c
* library/ctr_drbg.c
*
* This module enables the following ciphersuites:
* SSL_RSA_AES_128_SHA
@ -314,6 +326,8 @@
* Module: library/ctr_drbg.c
* Caller:
*
* Requires: POLARSSL_AES_C
*
* This module provides the CTR_DRBG AES-256 random number generator.
*/
#define POLARSSL_CTR_DRBG_C
@ -362,6 +376,20 @@
*/
#define POLARSSL_DHM_C
/**
* \def POLARSSL_ENTROPY_C
*
* Enable the platform-specific entropy code.
*
* Module: library/entropy.c
* Caller:
*
* Requires: POLARSSL_SHA4_C
*
* This module provides a generic entropy pool
*/
#define POLARSSL_ENTROPY_C
/**
* \def POLARSSL_ERROR_C
*

129
include/polarssl/entropy.h Normal file
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@ -0,0 +1,129 @@
/**
* \file entropy.h
*
* \brief Entropy accumulator implementation
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#ifndef POLARSSL_ENTROPY_H
#define POLARSSL_ENTROPY_H
#include <string.h>
#include "sha4.h"
#define POLARSSL_ERR_ENTROPY_SOURCE_FAILED -0x003A /**< Critical entropy source failure. */
#define POLARSSL_ERR_ENTROPY_MAX_SOURCES -0x003C /**< No more sources can be added. */
#define ENTROPY_MIN_POOL 128 /**< Minimum amount of pool entropy needed for release */
#define ENTROPY_MAX_SOURCES 20 /**< Maximum number of sources supported */
#define ENTROPY_MAX_GATHER 128 /**< Maximum amount requested from entropy sources */
#define ENTROPY_BLOCK_SIZE 64 /**< Block size of entropy accumulator (SHA-512) */
#define ENTROPY_SOURCE_MANUAL ENTROPY_MAX_SOURCES
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Entropy poll callback pointer
*
* \param data Callback-specific data pointer
* \param output Data to fill
* \param len Maximum size to provide
* \param olen The actual amount of bytes put into the buffer (Can be 0)
*
* \return 0 if no critical failures occurred,
* POLARSSL_ERR_ENTROPY_SOURCE_FAILED otherwise
*/
typedef int (*f_source_ptr)(void *, unsigned char *, size_t, size_t *);
/**
* \brief Entropy context structure
*/
typedef struct
{
sha4_context accumulator;
size_t size;
int source_count;
f_source_ptr f_source[ENTROPY_MAX_SOURCES];
void * p_source[ENTROPY_MAX_SOURCES];
}
entropy_context;
/**
* \brief Initialize the context
*
* \param ctx Entropy context to initialize
*/
void entropy_init( entropy_context *ctx );
/**
* \brief Adds an entropy source to poll
*
* \param ctx Entropy context
* \param f_source Entropy function
* \param p_source Function data
*
* \return 0 is successful or POLARSSL_ERR_ENTROPY_MAX_SOURCES
*/
int entropy_add_source( entropy_context *ctx,
f_source_ptr f_source, void *p_source );
/**
* \brief Trigger an extra gather poll for the accumulator
*
* \param ctx Entropy context
*
* \return 0 if successful, or POLARSSL_ERR_ENTROPY_SOURCE_FAILED
*/
int entropy_gather( entropy_context *ctx );
/**
* \brief Retrieve entropy from the accumulator (Max ENTROPY_BLOCK_SIZE)
*
* \param data Entropy context
* \param output Buffer to fill
* \param len Length of buffer
*
* \return 0 if successful, or POLARSSL_ERR_ENTROPY_SOURCE_FAILED
*/
int entropy_func( void *data, unsigned char *output, size_t len );
/**
* \brief Add data to the accumulator manually
*
* \param ctx Entropy context
* \param data Data to add
* \param len Length of data
*
* \return 0 if successful
*/
int entropy_update_manual( entropy_context *ctx,
const unsigned char *data, size_t len );
#ifdef __cplusplus
}
#endif
#endif /* entropy.h */

68
include/polarssl/entropy_poll.h Normal file
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@ -0,0 +1,68 @@
/**
* \file entropy_poll.h
*
* \brief Platform-specific and custom entropy polling functions
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#ifndef POLARSSL_ENTROPY_POLL_H
#define POLARSSL_ENTROPY_POLL_H
#include <string.h>
#include "config.h"
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
/**
* \brief Platform-specific entropy poll callback
*/
int platform_entropy_poll( void *data,
unsigned char *output, size_t len, size_t *olen );
#endif
#if defined(POLARSSL_HAVEGE_C)
/**
* \brief HAVEGE based entropy poll callback
*
* Requires an HAVEGE state as its data pointer.
*/
int havege_poll( void *data,
unsigned char *output, size_t len, size_t *olen );
#endif
#if defined(POLARSSL_TIMING_C)
/**
* \brief hardclock-based entropy poll callback
*/
int hardclock_poll( void *data,
unsigned char *output, size_t len, size_t *olen );
#endif
#ifdef __cplusplus
}
#endif
#endif /* entropy_poll.h */

1
include/polarssl/error.h
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@ -58,6 +58,7 @@
* DES 1 0x0032-0x0032
* NET 11 0x0040-0x0054
* CTR_DBRG 3 0x0034-0x0038
* ENTROPY 2 0x003A-0x003C
*
* High-level module nr (3 bits - 0x1...-0x8...)
* Name ID Nr of Errors

2
library/CMakeLists.txt
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@ -14,6 +14,8 @@ set(src
debug.c
des.c
dhm.c
entropy.c
entropy_poll.c
error.c
havege.c
md.c

22
library/Makefile
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@ -22,18 +22,18 @@ DLEXT=so
# Windows shared library extension:
# DLEXT=dll
OBJS= aes.o arc4.o asn1parse.o \
base64.o bignum.o camellia.o \
OBJS= aes.o arc4.o asn1parse.o \
base64.o bignum.o camellia.o \
certs.o cipher.o cipher_wrap.o \
ctr_drbg.o debug.o \
des.o dhm.o havege.o \
error.o \
md.o md_wrap.o md2.o \
md4.o md5.o net.o \
padlock.o pem.o pkcs11.o \
rsa.o sha1.o sha2.o \
sha4.o ssl_cli.o ssl_srv.o \
ssl_tls.o timing.o version.o \
ctr_drbg.o debug.o des.o \
dhm.o entropy.o entropy_poll.o \
error.o havege.o \
md.o md_wrap.o md2.o \
md4.o md5.o net.o \
padlock.o pem.o pkcs11.o \
rsa.o sha1.o sha2.o \
sha4.o ssl_cli.o ssl_srv.o \
ssl_tls.o timing.o version.o \
x509parse.o xtea.o

173
library/entropy.c Normal file
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@ -0,0 +1,173 @@
/*
* Entropy accumulator implementation
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_ENTROPY_C)
#include "polarssl/entropy.h"
#include "polarssl/entropy_poll.h"
#define ENTROPY_MAX_LOOP 256 /**< Maximum amount to loop before error */
void entropy_init( entropy_context *ctx )
{
memset( ctx, 0, sizeof(entropy_context) );
sha4_starts( &ctx->accumulator, 0 );
#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
entropy_add_source( ctx, platform_entropy_poll, NULL );
#endif
#if defined(POLARSSL_TIMING_C)
entropy_add_source( ctx, hardclock_poll, NULL );
#endif
}
int entropy_add_source( entropy_context *ctx,
f_source_ptr f_source, void *p_source )
{
if( ctx->source_count >= ENTROPY_MAX_SOURCES )
return( POLARSSL_ERR_ENTROPY_MAX_SOURCES );
ctx->f_source[ctx->source_count] = f_source;
ctx->p_source[ctx->source_count] = p_source;
ctx->source_count++;
return( 0 );
}
/*
* Entropy accumulator update
*/
int entropy_update( entropy_context *ctx, unsigned char source_id,
const unsigned char *data, size_t len )
{
unsigned char header[2];
unsigned char tmp[ENTROPY_BLOCK_SIZE];
size_t use_len = len;
const unsigned char *p = data;
if( use_len > ENTROPY_BLOCK_SIZE )
{
sha4( data, len, tmp, 0 );
p = tmp;
use_len = ENTROPY_BLOCK_SIZE;
}
header[0] = source_id;
header[1] = use_len & 0xFF;
sha4_update( &ctx->accumulator, header, 2 );
sha4_update( &ctx->accumulator, p, use_len );
ctx->size += use_len;
return( 0 );
}
int entropy_update_manual( entropy_context *ctx,
const unsigned char *data, size_t len )
{
return entropy_update( ctx, ENTROPY_SOURCE_MANUAL, data, len );
}
/*
* Run through the different sources to add entropy to our accumulator
*/
int entropy_gather( entropy_context *ctx )
{
int ret, i;
unsigned char buf[ENTROPY_MAX_GATHER];
size_t olen;
/*
* Run through our entropy sources
*/
for( i = 0; i < ctx->source_count; i++ )
{
olen = 0;
if ( ( ret = ctx->f_source[i]( ctx->p_source[i],
buf, ENTROPY_MAX_GATHER, &olen ) ) != 0 )
{
return( ret );
}
/*
* Add if we actually gathered something
*/
if( olen > 0 )
entropy_update( ctx, (unsigned char) i, buf, olen );
}
return( 0 );
}
int entropy_func( void *data, unsigned char *output, size_t len )
{
int ret, count = 0;
entropy_context *ctx = (entropy_context *) data;
unsigned char buf[ENTROPY_BLOCK_SIZE];
if( len > ENTROPY_BLOCK_SIZE )
return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
/*
* Always gather extra entropy before a call
*/
do
{
if( count++ > ENTROPY_MAX_LOOP )
return( POLARSSL_ERR_ENTROPY_SOURCE_FAILED );
if( ( ret = entropy_gather( ctx ) ) != 0 )
return( ret );
}
while( ctx->size < ENTROPY_MIN_POOL );
memset( buf, 0, ENTROPY_BLOCK_SIZE );
sha4_finish( &ctx->accumulator, buf );
/*
* Perform second SHA-512 on entropy
*/
sha4( buf, ENTROPY_BLOCK_SIZE, buf, 0 );
/*
* Reset accumulator
*/
memset( &ctx->accumulator, 0, sizeof( sha4_context ) );
sha4_starts( &ctx->accumulator, 0 );
ctx->size = 0;
memcpy( output, buf, len );
return( 0 );
}
#endif

135
library/entropy_poll.c Normal file
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@ -0,0 +1,135 @@
/*
* Platform-specific and custom entropy polling functions
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_ENTROPY_C)
#include "polarssl/entropy.h"
#include "polarssl/entropy_poll.h"
#if defined(POLARSSL_TIMING_C)
#include "polarssl/timing.h"
#endif
#if defined(POLARSSL_HAVEGE_C)
#include "polarssl/havege.h"
#endif
#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
#if defined(_WIN32)
#include <windows.h>
#if !defined(_WIN32_WINNT)
#define _WIN32_WINNT 0x0400
#endif
#include <wincrypt.h>
int platform_entropy_poll( void *data, unsigned char *output, size_t len,
size_t *olen )
{
HCRYPTPROV provider;
*olen = 0;
if( CryptAcquireContext( &provider, NULL, NULL,
PROV_RSA_FULL, CRYPT_VERIFYCONTEXT ) == FALSE )
{
return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
}
if( CryptGenRandom( provider, len, output ) == FALSE )
return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
CryptReleaseContext( provider, 0 );
*olen = len;
return( 0 );
}
#else
#include <stdio.h>
int platform_entropy_poll( void *data,
unsigned char *output, size_t len, size_t *olen )
{
FILE *file;
size_t ret;
((void) data);
*olen = 0;
file = fopen( "/dev/urandom", "rb" );
if( file == NULL )
return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
ret = fread( output, 1, len, file );
if( ret != len )
{
fclose( file );
return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
}
fclose( file );
*olen = len;
return( 0 );
}
#endif
#endif
#if defined(POLARSSL_TIMING_C)
int hardclock_poll( void *data,
unsigned char *output, size_t len, size_t *olen )
{
unsigned long timer = hardclock();
((void) data);
*olen = 0;
if( len < sizeof(unsigned long) )
return( 0 );
memcpy( output, &timer, sizeof(unsigned long) );
*olen = sizeof(unsigned long);
return( 0 );
}
#endif
#if defined(POLARSSL_HAVEGE_C)
int havege_poll( void *data,
unsigned char *output, size_t len, size_t *olen )
{
havege_state *hs = (havege_state *) data;
*olen = 0;
if( havege_random( hs, output, len ) != 0 )
return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
*olen = len;
return( 0 );
}
#endif
#endif /* POLARSSL_ENTROPY_C */

11
library/error.c
View File

@ -59,6 +59,10 @@
#include "polarssl/dhm.h"
#endif
#if defined(POLARSSL_ENTROPY_C)
#include "polarssl/entropy.h"
#endif
#if defined(POLARSSL_MD_C)
#include "polarssl/md.h"
#endif
@ -391,6 +395,13 @@ void error_strerror( int ret, char *buf, size_t buflen )
snprintf( buf, buflen, "DES - The data input has an invalid length" );
#endif /* POLARSSL_DES_C */
#if defined(POLARSSL_ENTROPY_C)
if( use_ret == -(POLARSSL_ERR_ENTROPY_SOURCE_FAILED) )
snprintf( buf, buflen, "ENTROPY - Critical entropy source failure" );
if( use_ret == -(POLARSSL_ERR_ENTROPY_MAX_SOURCES) )
snprintf( buf, buflen, "ENTROPY - No more sources can be added" );
#endif /* POLARSSL_ENTROPY_C */
#if defined(POLARSSL_NET_C)
if( use_ret == -(POLARSSL_ERR_NET_UNKNOWN_HOST) )
snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );

18
programs/Makefile
View File

@ -19,7 +19,9 @@ APPS = aes/aescrypt2 aes/crypt_and_hash \
pkey/rsa_sign_pss pkey/rsa_verify_pss \
ssl/ssl_client1 ssl/ssl_client2 \
ssl/ssl_server ssl/ssl_fork_server \
ssl/ssl_mail_client random/gen_random \
ssl/ssl_mail_client random/gen_entropy \
random/gen_random_havege \
random/gen_random_ctr_drbg \
test/ssl_cert_test test/benchmark \
test/selftest test/ssl_test \
x509/cert_app x509/crl_app
@ -104,9 +106,17 @@ pkey/rsa_encrypt: pkey/rsa_encrypt.c ../library/libpolarssl.a
echo " CC pkey/rsa_encrypt.c"
$(CC) $(CFLAGS) $(OFLAGS) pkey/rsa_encrypt.c $(LDFLAGS) -o $@
random/gen_random: random/gen_random.c ../library/libpolarssl.a
echo " CC random/gen_random.c"
$(CC) $(CFLAGS) $(OFLAGS) random/gen_random.c $(LDFLAGS) -o $@
random/gen_entropy: random/gen_entropy.c ../library/libpolarssl.a
echo " CC random/gen_entropy.c"
$(CC) $(CFLAGS) $(OFLAGS) random/gen_entropy.c $(LDFLAGS) -o $@
random/gen_random_havege: random/gen_random_havege.c ../library/libpolarssl.a
echo " CC random/gen_random_havege.c"
$(CC) $(CFLAGS) $(OFLAGS) random/gen_random_havege.c $(LDFLAGS) -o $@
random/gen_random_ctr_drbg: random/gen_random_ctr_drbg.c ../library/libpolarssl.a
echo " CC random/gen_random_ctr_drbg.c"
$(CC) $(CFLAGS) $(OFLAGS) random/gen_random_ctr_drbg.c $(LDFLAGS) -o $@
ssl/ssl_client1: ssl/ssl_client1.c ../library/libpolarssl.a
echo " CC ssl/ssl_client1.c"

12
programs/random/CMakeLists.txt
View File

@ -1,6 +1,12 @@
add_executable(gen_random gen_random.c)
target_link_libraries(gen_random polarssl)
add_executable(gen_random_havege gen_random.c)
target_link_libraries(gen_random_havege polarssl)
INSTALL(TARGETS gen_random
add_executable(gen_random_ctr_drbg gen_random_ctr_drbg.c)
target_link_libraries(gen_random_ctr_drbg polarssl)
add_executable(gen_entropy gen_entropy.c)
target_link_libraries(gen_entropy polarssl)
INSTALL(TARGETS gen_random_havege gen_random_ctr_drbg gen_entropy
DESTINATION "bin"
PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

87
programs/random/gen_entropy.c Normal file
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@ -0,0 +1,87 @@
/**
* \brief Use and generate multiple entropies calls into a file
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#include "polarssl/config.h"
#include "polarssl/entropy.h"
#include <stdio.h>
#if !defined(POLARSSL_ENTROPY_C)
int main( int argc, char *argv[] )
{
((void) argc);
((void) argv);
printf("POLARSSL_ENTROPY_C not defined.\n");
return( 0 );
}
#else
int main( int argc, char *argv[] )
{
FILE *f;
int i, k, ret;
entropy_context entropy;
unsigned char buf[ENTROPY_BLOCK_SIZE];
if( argc < 2 )
{
fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
return( 1 );
}
if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
{
printf( "failed to open '%s' for writing.\n", argv[0] );
return( 1 );
}
entropy_init( &entropy );
for( i = 0, k = 768; i < k; i++ )
{
ret = entropy_func( &entropy, buf, sizeof( buf ) );
if( ret != 0 )
{
printf("failed!\n");
goto cleanup;
}
fwrite( buf, 1, sizeof( buf ), f );
printf( "Generating 32Mb of data in file '%s'... %04.1f" \
"%% done\r", argv[1], (100 * (float) (i + 1)) / k );
fflush( stdout );
}
ret = 0;
cleanup:
fclose( f );
return( ret );
}
#endif /* POLARSSL_ENTROPY_C */

91
programs/random/gen_random_ctr_drbg.c Normal file
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@ -0,0 +1,91 @@
/**
* \brief Use and generate random data into a file via the CTR_DBRG based on AES
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* 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.
*/
#include "polarssl/config.h"
#include "polarssl/entropy.h"
#include "polarssl/ctr_drbg.h"
#include <stdio.h>
#if !defined(POLARSSL_CTR_DRBG_C) || !defined(POLARSSL_ENTROPY_C)
int main( int argc, char *argv[] )
{
((void) argc);
((void) argv);
printf("POLARSSL_CTR_DRBG_C or POLARSSL_ENTROPY_C not defined.\n");
return( 0 );
}
#else
int main( int argc, char *argv[] )
{
FILE *f;
int i, k, ret;
ctr_drbg_context ctr_drbg;
entropy_context entropy;
unsigned char buf[1024];
if( argc < 2 )
{
fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
return( 1 );
}
if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
{
printf( "failed to open '%s' for writing.\n", argv[0] );
return( 1 );
}
entropy_init( &entropy );
ctr_drbg_init( &ctr_drbg, entropy_func, &entropy, (unsigned char *) "RANDOM_GEN", 10 );
ctr_drbg_set_prediction_resistance( &ctr_drbg, CTR_DRBG_PR_OFF );
for( i = 0, k = 768; i < k; i++ )
{
ret = ctr_drbg_random( &ctr_drbg, buf, sizeof( buf ) );
if( ret != 0 )
{
printf("failed!\n");
goto cleanup;
}
fwrite( buf, 1, sizeof( buf ), f );
printf( "Generating 32Mb of data in file '%s'... %04.1f" \
"%% done\r", argv[1], (100 * (float) (i + 1)) / k );
fflush( stdout );
}
ret = 0;
cleanup:
fclose( f );
return( ret );
}
#endif /* POLARSSL_HAVEGE_C && POLARSSL_ENTROPY_C */

0
programs/random/gen_random.c → programs/random/gen_random_havege.c
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2
scripts/generate_errors.pl
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@ -9,7 +9,7 @@ my $error_file = shift or die "Missing destination file";
my $error_format_file = $data_dir.'/error.fmt';
my @low_level_modules = ( "AES", "ASN1", "CAMELLIA", "BIGNUM", "BASE64", "XTEA",
"PADLOCK", "DES", "NET", "CTR_DRBG" );
"PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY" );
my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "MD", "CIPHER", "SSL" );
my $line_separator = $/;