MatasanoCrypto/utils/common.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

unsigned long read_file_to_buffer(	const char* const filepath,
									char* obuff,
									int remove_new_line_chr)
{
	FILE* fh=0;
	size_t len=0;
	char* line=NULL;
	unsigned long total_len=0;

	if( (fh=fopen(filepath, "rb")) == 0 )
	{
		fprintf(stderr, "File %s doesn't exist. Exiting...\n", filepath);
		exit(1);
	}

	if(obuff=NULL)
	{
		//allocate
		fseek(fh, 0, SEEK_END);
		int pos = ftell(fh);
		fseek(fh, 0, SEEK_CUR);
		obuff = malloc(pos);
	}

	while( getline(&line, &len, fh) != -1 )
	{
		len = strlen(line);
		if(remove_new_line_chr)
			len--;

		strncpy(obuff+total_len, line, len);
		total_len+=len;
		free(line);
		line=NULL;
	}
	return total_len;
}

Result_t load_base64_to_hex(const char* const filepath, uint8_t* hex_buffer, size_t* len)
{
	uint8_t* base64_buff;
	*len = read_file_to_buffer(filepath, base64_buff, 1);
///	int base64_to_hex(const unsigned char* const i_string,
							//int i_string_len,
							//unsigned char* o_hex_array );
	base64_to_hex(base64_buff, *len, hex_buffer);


}

void check(int iFlag, const unsigned char* const msg)
{
	if(!iFlag)
	{
		fprintf(stderr, "ERROR: %s\n", msg);
		exit(1);
	}
}