#include "config.h"
#include "unity.h"

#ifdef OPENSSL
# include "openssl/err.h"
# include "openssl/rand.h"
# include "openssl/evp.h"
#endif
#include "ntp.h"
#include "ntp_stdlib.h"

u_long current_time = 4;


/*
 * Example packet with MD5 hash calculated manually.
 */
const int keytype = KEY_TYPE_MD5;
const u_char *key = (const u_char*)"abcdefgh";
const u_short keyLength = 8;
const u_char *packet = (const u_char*)"ijklmnopqrstuvwx";
#define packetLength 16
#define keyIdLength  4
#define digestLength 16
#define totalLength (packetLength + keyIdLength + digestLength)
union {
	u_char		u8 [totalLength];
	uint32_t	u32[1];
} expectedPacket = {
	"ijklmnopqrstuvwx\0\0\0\0\x0c\x0e\x84\xcf\x0b\xb7\xa8\x68\x8e\x52\x38\xdb\xbc\x1c\x39\x53"
};
union {
	u_char		u8 [totalLength];
	uint32_t	u32[1];
} invalidPacket = {
	"ijklmnopqrstuvwx\0\0\0\0\x0c\x0e\x84\xcf\x0b\xb7\xa8\x68\x8e\x52\x38\xdb\xbc\x1c\x39\x54"
};


void test_Encrypt(void);
void test_DecryptValid(void);
void test_DecryptInvalid(void);
void test_IPv4AddressToRefId(void);
void test_IPv6AddressToRefId(void);


void
test_Encrypt(void) {
	u_int32 *packetPtr;
	int length;

	packetPtr = emalloc(totalLength * sizeof(*packetPtr));

	memset(packetPtr + packetLength, 0, keyIdLength);
	memcpy(packetPtr, packet, packetLength);

	cache_secretsize = keyLength;

	length = MD5authencrypt(keytype, key, packetPtr, packetLength);

	TEST_ASSERT_TRUE(MD5authdecrypt(keytype, key, packetPtr, packetLength, length));

	TEST_ASSERT_EQUAL(20, length);
	TEST_ASSERT_EQUAL_MEMORY(expectedPacket.u8, packetPtr, totalLength);

	free(packetPtr);
}

void
test_DecryptValid(void) {
	cache_secretsize = keyLength;
	TEST_ASSERT_TRUE(MD5authdecrypt(keytype, key, expectedPacket.u32, packetLength, 20));
}

void
test_DecryptInvalid(void) {
	cache_secretsize = keyLength;
	TEST_ASSERT_FALSE(MD5authdecrypt(keytype, key, invalidPacket.u32, packetLength, 20));
}

void
test_IPv4AddressToRefId(void) {
	sockaddr_u addr;
	addr.sa4.sin_family = AF_INET;
	u_int32 address;

	addr.sa4.sin_port = htons(80);

	address = inet_addr("192.0.2.1");
	addr.sa4.sin_addr.s_addr = address;

	TEST_ASSERT_EQUAL(address, addr2refid(&addr));
}

void
test_IPv6AddressToRefId(void) {
	const int expected = 0x75cffd52;
	const struct in6_addr address = { { {
		0x20, 0x01, 0x0d, 0xb8,
		0x85, 0xa3, 0x08, 0xd3,
		0x13, 0x19, 0x8a, 0x2e,
		0x03, 0x70, 0x73, 0x34
	} } };
	sockaddr_u addr;

	addr.sa6.sin6_family = AF_INET6;

	addr.sa6.sin6_addr = address;


#if 0
	TEST_ASSERT_EQUAL(expected, addr2refid(&addr));
#else
	(void)expected;
	TEST_IGNORE_MESSAGE("Skipping because of big endian problem?");
#endif
}