base64-test.c

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

#include <event.h>

#include <openssl/sha.h>

#include "base64.h"

#define VALUE_SIZE 65536

static const char hex_digits[] = "0123456789abcdef";

static const char *__sha1_string(const void *buf, size_t len, char *string)
{
	char *ptr = string;
	unsigned char digest[SHA_DIGEST_LENGTH];
	int i;

	SHA1(buf, len, digest);

	for (i = 0; i < SHA_DIGEST_LENGTH; i ++) {
		*ptr++ = hex_digits[digest[i] & 0xf];
		*ptr++ = hex_digits[(digest[i] >> 4) & 0xf];
	}
	*ptr++ = 0;

	return string;
}

#define sha1_string(buf, len) \
	__sha1_string(buf, len, alloca(SHA_DIGEST_LENGTH * 2 + 1))

int main(int argc, char **argv)
{
	struct evbuffer *buf;
	unsigned char value[VALUE_SIZE];
	unsigned char *value_decoded;
	size_t i, size;

	for (i = 0; i < VALUE_SIZE; i ++)
		value[i] = random();

	printf("%zu %s\n", i, sha1_string(value, VALUE_SIZE));

	buf = evbuffer_new();
	base64_encode_evbuf(buf, value, VALUE_SIZE);
	evbuffer_add(buf, (u_char *)"\0", 1);

	size = base64_size(EVBUFFER_LENGTH(buf));
	value_decoded = malloc(size);
	assert(value_decoded != NULL);

	if (EVBUFFER_LENGTH(buf) < 160) {
		printf("%*s\n", (int)EVBUFFER_LENGTH(buf),
				(char *)EVBUFFER_DATA(buf));
	}

	size = base64_decode((const char *)EVBUFFER_DATA(buf), value_decoded,
			size);

	printf("%zu %s\n", size, sha1_string(value_decoded, VALUE_SIZE));

	return 0;
}