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better handling of failed calloc

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This commit is contained in:
Brian Murray 2016-05-23 20:17:04 -07:00 committed by Simon Butcher
parent 57863ad7ed
commit 2cfa5072ed
1 changed files with 10 additions and 6 deletions
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16
library/cmac.c
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@ -173,12 +173,6 @@ int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx,
if( cipher_info == NULL ) if( cipher_info == NULL )
return( MBEDTLS_ERR_CMAC_BAD_INPUT ); return( MBEDTLS_ERR_CMAC_BAD_INPUT );
ctx->K1 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) );
ctx->K2 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) );
if(ctx->K1 == NULL || ctx->K2 == NULL )
return MBEDTLS_ERR_CMAC_ALLOC_FAILED;
mbedtls_cipher_free( &ctx->cipher_ctx ); mbedtls_cipher_free( &ctx->cipher_ctx );
if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 ) if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
@ -190,6 +184,16 @@ int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx,
return( ret ); return( ret );
} }
ctx->K1 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) );
ctx->K2 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) );
if( ctx->K1 == NULL || ctx->K2 == NULL )
{
mbedtls_free(ctx->K1);
mbedtls_free(ctx->K2);
return( MBEDTLS_ERR_CMAC_ALLOC_FAILED );
}
return( cmac_generate_subkeys( ctx ) ); return( cmac_generate_subkeys( ctx ) );
} }