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Add hmac_drbg_{write,update}_seed_file()

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Manuel Pégourié-Gonnard 2014-01-30 21:11:16 +01:00
parent fef0f8f55a
commit 48bc3e81da
7 changed files with 157 additions and 0 deletions
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26
include/polarssl/hmac_drbg.h
View file

@ -221,6 +221,32 @@ int hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len );
*/
void hmac_drbg_free( hmac_drbg_context *ctx );
#if defined(POLARSSL_FS_IO)
/**
* \brief Write a seed file
*
* \param ctx HMAC_DRBG context
* \param path Name of the file
*
* \return 0 if successful, 1 on file error, or
* POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
*/
int hmac_drbg_write_seed_file( hmac_drbg_context *ctx, const char *path );
/**
* \brief Read and update a seed file. Seed is added to this
* instance
*
* \param ctx HMAC_DRBG context
* \param path Name of the file
*
* \return 0 if successful, 1 on file error,
* POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED or
* POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG
*/
int hmac_drbg_update_seed_file( hmac_drbg_context *ctx, const char *path );
#endif
#if defined(POLARSSL_SELF_TEST)
/**

63
library/hmac_drbg.c
View file

@ -35,6 +35,10 @@
#include "polarssl/hmac_drbg.h"
#if defined(POLARSSL_FS_IO)
#include <stdio.h>
#endif
/*
* HMAC_DRBG update, using optional additional data (10.1.2.2)
*/
@ -284,6 +288,65 @@ void hmac_drbg_free( hmac_drbg_context *ctx )
memset( ctx, 0, sizeof( hmac_drbg_context ) );
}
#if defined(POLARSSL_FS_IO)
int hmac_drbg_write_seed_file( hmac_drbg_context *ctx, const char *path )
{
int ret = POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR;
FILE *f;
unsigned char buf[ POLARSSL_HMAC_DRBG_MAX_INPUT ];
if( ( f = fopen( path, "wb" ) ) == NULL )
return( POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR );
if( ( ret = hmac_drbg_random( ctx, buf, sizeof( buf ) ) ) != 0 )
goto exit;
if( fwrite( buf, 1, sizeof( buf ), f ) != sizeof( buf ) )
{
ret = POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR;
goto exit;
}
ret = 0;
exit:
fclose( f );
return( ret );
}
int hmac_drbg_update_seed_file( hmac_drbg_context *ctx, const char *path )
{
FILE *f;
size_t n;
unsigned char buf[ POLARSSL_HMAC_DRBG_MAX_INPUT ];
if( ( f = fopen( path, "rb" ) ) == NULL )
return( POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR );
fseek( f, 0, SEEK_END );
n = (size_t) ftell( f );
fseek( f, 0, SEEK_SET );
if( n > POLARSSL_HMAC_DRBG_MAX_INPUT )
{
fclose( f );
return( POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG );
}
if( fread( buf, 1, n, f ) != n )
{
fclose( f );
return( POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR );
}
fclose( f );
hmac_drbg_update( ctx, buf, n );
return( hmac_drbg_write_seed_file( ctx, path ) );
}
#endif /* POLARSSL_FS_IO */
#if defined(POLARSSL_SELF_TEST)

1
tests/.gitignore vendored
View file

@ -1,2 +1,3 @@
/test_suite*
data_files/mpi_write
data_files/hmac_drbg_seed

1
tests/CMakeLists.txt
View file

@ -63,6 +63,7 @@ add_test_suite(gcm gcm.aes128_de)
add_test_suite(gcm gcm.aes192_de)
add_test_suite(gcm gcm.aes256_de)
add_test_suite(gcm gcm.camellia)
add_test_suite(hmac_drbg hmac_drbg.misc)
add_test_suite(hmac_drbg hmac_drbg.no_reseed)
add_test_suite(hmac_shax)
add_test_suite(md)

9
tests/Makefile
View file

@ -44,6 +44,7 @@ APPS = test_suite_aes.ecb test_suite_aes.cbc \
test_suite_gcm.aes192_en \
test_suite_gcm.aes256_en \
test_suite_gcm.camellia test_suite_hmac_shax \
test_suite_hmac_drbg.misc \
test_suite_hmac_drbg.no_reseed \
test_suite_md test_suite_mdx \
test_suite_mpi test_suite_pbkdf2 \
@ -134,6 +135,10 @@ test_suite_gcm.camellia.c : suites/test_suite_gcm.function suites/test_suite_gcm
echo " Generate $@"
scripts/generate_code.pl suites test_suite_gcm test_suite_gcm.camellia
test_suite_hmac_drbg.misc.c : suites/test_suite_hmac_drbg.function suites/test_suite_hmac_drbg.misc.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
echo " Generate $@"
scripts/generate_code.pl suites test_suite_hmac_drbg test_suite_hmac_drbg.misc
test_suite_hmac_drbg.no_reseed.c : suites/test_suite_hmac_drbg.function suites/test_suite_hmac_drbg.no_reseed.data scripts/generate_code.pl suites/helpers.function suites/main_test.function
echo " Generate $@"
scripts/generate_code.pl suites test_suite_hmac_drbg test_suite_hmac_drbg.no_reseed
@ -262,6 +267,10 @@ test_suite_gcm.camellia: test_suite_gcm.camellia.c ../library/libpolarssl.a
echo " CC $@.c"
$(CC) $(CFLAGS) $(OFLAGS) $@.c $(LDFLAGS) -o $@
test_suite_hmac_drbg.misc: test_suite_hmac_drbg.misc.c ../library/libpolarssl.a
echo " CC $@.c"
$(CC) $(CFLAGS) $(OFLAGS) $@.c $(LDFLAGS) -o $@
test_suite_hmac_drbg.no_reseed: test_suite_hmac_drbg.no_reseed.c ../library/libpolarssl.a
echo " CC $@.c"
$(CC) $(CFLAGS) $(OFLAGS) $@.c $(LDFLAGS) -o $@

17
tests/suites/test_suite_hmac_drbg.function
View file

@ -28,6 +28,23 @@ int entropy_func( void *data, unsigned char *buf, size_t len )
* END_DEPENDENCIES
*/
/* BEGIN_CASE depends_on:POLARSSL_FS_IO */
void hmac_drbg_seed_file( int md_alg, char *path, int ret )
{
const md_info_t *md_info;
hmac_drbg_context ctx;
TEST_ASSERT( ( md_info = md_info_from_type( md_alg ) ) != NULL );
TEST_ASSERT( hmac_drbg_init( &ctx, md_info, rnd_std_rand, NULL,
NULL, 0 ) == 0 );
TEST_ASSERT( hmac_drbg_write_seed_file( &ctx, path ) == ret );
TEST_ASSERT( hmac_drbg_update_seed_file( &ctx, path ) == ret );
hmac_drbg_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE */
void hmac_drbg_no_reseed( int md_alg,
char *entropy_hex, char *custom_hex,

40
tests/suites/test_suite_hmac_drbg.misc.data Normal file
View file

@ -0,0 +1,40 @@
HMAC_DRBG write/update seed file SHA-1
depends_on:POLARSSL_SHA1_C
hmac_drbg_seed_file:POLARSSL_MD_SHA1:"data_files/hmac_drbg_seed":0
HMAC_DRBG write/update seed file SHA-1
depends_on:POLARSSL_SHA1_C
hmac_drbg_seed_file:POLARSSL_MD_SHA1:"no_such_dir/file":POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR
HMAC_DRBG write/update seed file SHA-224
depends_on:POLARSSL_SHA256_C
hmac_drbg_seed_file:POLARSSL_MD_SHA224:"data_files/hmac_drbg_seed":0
HMAC_DRBG write/update seed file SHA-224
depends_on:POLARSSL_SHA256_C
hmac_drbg_seed_file:POLARSSL_MD_SHA224:"no_such_dir/file":POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR
HMAC_DRBG write/update seed file SHA-256
depends_on:POLARSSL_SHA256_C
hmac_drbg_seed_file:POLARSSL_MD_SHA256:"data_files/hmac_drbg_seed":0
HMAC_DRBG write/update seed file SHA-256
depends_on:POLARSSL_SHA256_C
hmac_drbg_seed_file:POLARSSL_MD_SHA256:"no_such_dir/file":POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR
HMAC_DRBG write/update seed file SHA-384
depends_on:POLARSSL_SHA512_C
hmac_drbg_seed_file:POLARSSL_MD_SHA384:"data_files/hmac_drbg_seed":0
HMAC_DRBG write/update seed file SHA-384
depends_on:POLARSSL_SHA512_C
hmac_drbg_seed_file:POLARSSL_MD_SHA384:"no_such_dir/file":POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR
HMAC_DRBG write/update seed file SHA-512
depends_on:POLARSSL_SHA512_C
hmac_drbg_seed_file:POLARSSL_MD_SHA512:"data_files/hmac_drbg_seed":0
HMAC_DRBG write/update seed file SHA-512
depends_on:POLARSSL_SHA512_C
hmac_drbg_seed_file:POLARSSL_MD_SHA512:"no_such_dir/file":POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR