utils.c

//
// Created by Urs Gerber on 08.03.18.
//

#include "utils.h"
#include <wolfssl/options.h>
#include <wolfssl/wolfcrypt/types.h>

void phex(byte* ary, size_t len) {
    for (unsigned int i = 0; i < len; i++) {
        printf("%02x", ary[i]);
    }
    printf("\n");
}

size_t buffer_to_hexstring(char **string, byte *buffer, size_t buf_len) {
    size_t out_len = 2*buf_len + 1;
    char* block = malloc(out_len);
    char* p = block;

    for (int i = 0; i < buf_len; i++) {
        p += sprintf(p, "%02x", buffer[i]);
    }
    block[out_len-1] = 0;

    *string = block;
    return out_len;
}

size_t hexstring_to_buffer(byte **buffer, char *string, size_t string_len) {
    size_t out_length = string_len / 2;
    byte* block = malloc(out_length);

    for (unsigned int i = 0; i < out_length; i++) {
        char buf[3] = {string[2*i], string[2*i+1], 0};
        block[i] = (byte) strtol(buf, 0, 16);
    }

    *buffer = block;
    return out_length;
}