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Zeroize tmp buf in ctr_drbg_write_seed_file()

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This commit is contained in:
Andres Amaya Garcia 2017-07-12 10:56:39 +01:00
parent f4660aaf4c
commit c0dc5b5d3b
1 changed files with 7 additions and 3 deletions
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10
library/ctr_drbg.c
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@ -406,9 +406,9 @@ int ctr_drbg_write_seed_file( ctr_drbg_context *ctx, const char *path )
else else
ret = 0; ret = 0;
exit:
polarssl_zeroize( buf, sizeof( buf ) ); polarssl_zeroize( buf, sizeof( buf ) );
exit:
fclose( f ); fclose( f );
return( ret ); return( ret );
} }
@ -428,8 +428,12 @@ int ctr_drbg_update_seed_file( ctr_drbg_context *ctx, const char *path )
fseek( f, 0, SEEK_SET ); fseek( f, 0, SEEK_SET );
if( n > CTR_DRBG_MAX_INPUT ) if( n > CTR_DRBG_MAX_INPUT )
ret = POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG; {
else if( fread( buf, 1, n, f ) != n ) fclose( f );
return( POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG );
}
if( fread( buf, 1, n, f ) != n )
ret = POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR; ret = POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR;
else else
ctr_drbg_update( ctx, buf, n ); ctr_drbg_update( ctx, buf, n );