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/*
* Copyright (c) 2023 Egor Tensin <egor@tensin.name>
* This file is part of the "cimple" project.
* For details, see https://github.com/egor-tensin/cimple.
* Distributed under the MIT License.
*/
#include "base64.h"
#include "log.h"
#include <sodium.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
static const int base64_variant = sodium_base64_VARIANT_ORIGINAL;
int base64_encode(const unsigned char *src, size_t src_len, char **_dst)
{
const size_t dst_len = sodium_base64_encoded_len(src_len, base64_variant);
char *dst = calloc(dst_len, 1);
if (!dst) {
log_errno("calloc");
return -1;
}
sodium_bin2base64(dst, dst_len, src, src_len, base64_variant);
*_dst = dst;
return 0;
}
int base64_decode(const char *src, unsigned char **_dst, size_t *_dst_len)
{
const size_t src_len = strlen(src);
const size_t dst_max_len = src_len / 4 * 3;
size_t dst_len = 0;
unsigned char *dst = calloc(dst_max_len, 1);
if (!dst) {
log_errno("calloc");
return -1;
}
int ret =
sodium_base642bin(dst, dst_max_len, src, src_len, NULL, &dst_len, NULL, base64_variant);
if (ret < 0) {
log_err("Couldn't parse base64-encoded string\n");
goto free;
}
*_dst = dst;
*_dst_len = dst_len;
return ret;
free:
free(dst);
return ret;
}
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