/*
 * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include "../ssl/packet_locl.h"

#define BUF_LEN 255

static int test_PACKET_remaining(unsigned char buf[BUF_LEN])
{
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            ||  PACKET_remaining(&pkt) != BUF_LEN
            || !PACKET_forward(&pkt, BUF_LEN - 1)
            ||  PACKET_remaining(&pkt) != 1
            || !PACKET_forward(&pkt, 1)
            ||  PACKET_remaining(&pkt) != 0) {
        fprintf(stderr, "test_PACKET_remaining() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_end(unsigned char buf[BUF_LEN])
{
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            ||  PACKET_remaining(&pkt) != BUF_LEN
            ||  PACKET_end(&pkt) != buf + BUF_LEN
            || !PACKET_forward(&pkt, BUF_LEN - 1)
            || PACKET_end(&pkt) != buf + BUF_LEN
            || !PACKET_forward(&pkt, 1)
            || PACKET_end(&pkt) != buf + BUF_LEN) {
        fprintf(stderr, "test_PACKET_end() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_1(unsigned char buf[BUF_LEN])
{
    unsigned int i;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_1(&pkt, &i)
            ||  i != 0x02
            || !PACKET_forward(&pkt, BUF_LEN - 2)
            || !PACKET_get_1(&pkt, &i)
            ||  i != 0xfe
            ||  PACKET_get_1(&pkt, &i)) {
        fprintf(stderr, "test_PACKET_get_1() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_4(unsigned char buf[BUF_LEN])
{
    unsigned long i;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_4(&pkt, &i)
            ||  i != 0x08060402UL
            || !PACKET_forward(&pkt, BUF_LEN - 8)
            || !PACKET_get_4(&pkt, &i)
            ||  i != 0xfefcfaf8UL
            ||  PACKET_get_4(&pkt, &i)) {
        fprintf(stderr, "test_PACKET_get_4() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_net_2(unsigned char buf[BUF_LEN])
{
    unsigned int i;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_net_2(&pkt, &i)
            ||  i != 0x0204
            || !PACKET_forward(&pkt, BUF_LEN - 4)
            || !PACKET_get_net_2(&pkt, &i)
            ||  i != 0xfcfe
            ||  PACKET_get_net_2(&pkt, &i)) {
        fprintf(stderr, "test_PACKET_get_net_2() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_net_3(unsigned char buf[BUF_LEN])
{
    unsigned long i;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_net_3(&pkt, &i)
            ||  i != 0x020406UL
            || !PACKET_forward(&pkt, BUF_LEN - 6)
            || !PACKET_get_net_3(&pkt, &i)
            ||  i != 0xfafcfeUL
            ||  PACKET_get_net_3(&pkt, &i)) {
        fprintf(stderr, "test_PACKET_get_net_3() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_net_4(unsigned char buf[BUF_LEN])
{
    unsigned long i;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_net_4(&pkt, &i)
            ||  i != 0x02040608UL
            || !PACKET_forward(&pkt, BUF_LEN - 8)
            || !PACKET_get_net_4(&pkt, &i)
            ||  i != 0xf8fafcfeUL
            ||  PACKET_get_net_4(&pkt, &i)) {
        fprintf(stderr, "test_PACKET_get_net_4() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_sub_packet(unsigned char buf[BUF_LEN])
{
    PACKET pkt, subpkt;
    unsigned long i;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_sub_packet(&pkt, &subpkt, 4)
            || !PACKET_get_net_4(&subpkt, &i)
            ||  i != 0x02040608UL
            ||  PACKET_remaining(&subpkt)
            || !PACKET_forward(&pkt, BUF_LEN - 8)
            || !PACKET_get_sub_packet(&pkt, &subpkt, 4)
            || !PACKET_get_net_4(&subpkt, &i)
            ||  i != 0xf8fafcfeUL
            ||  PACKET_remaining(&subpkt)
            ||  PACKET_get_sub_packet(&pkt, &subpkt, 4)) {
        fprintf(stderr, "test_PACKET_get_sub_packet() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_bytes(unsigned char buf[BUF_LEN])
{
    const unsigned char *bytes;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_get_bytes(&pkt, &bytes, 4)
            ||  bytes[0] != 2 || bytes[1] != 4
            ||  bytes[2] != 6 || bytes[3] != 8
            ||  PACKET_remaining(&pkt) != BUF_LEN -4
            || !PACKET_forward(&pkt, BUF_LEN - 8)
            || !PACKET_get_bytes(&pkt, &bytes, 4)
            ||  bytes[0] != 0xf8 || bytes[1] != 0xfa
            ||  bytes[2] != 0xfc || bytes[3] != 0xfe
            ||  PACKET_remaining(&pkt)) {
        fprintf(stderr, "test_PACKET_get_bytes() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_copy_bytes(unsigned char buf[BUF_LEN])
{
    unsigned char bytes[4];
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_copy_bytes(&pkt, bytes, 4)
            ||  bytes[0] != 2 || bytes[1] != 4
            ||  bytes[2] != 6 || bytes[3] != 8
            ||  PACKET_remaining(&pkt) != BUF_LEN - 4
            || !PACKET_forward(&pkt, BUF_LEN - 8)
            || !PACKET_copy_bytes(&pkt, bytes, 4)
            ||  bytes[0] != 0xf8 || bytes[1] != 0xfa
            ||  bytes[2] != 0xfc || bytes[3] != 0xfe
            ||  PACKET_remaining(&pkt)) {
        fprintf(stderr, "test_PACKET_copy_bytes() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_copy_all(unsigned char buf[BUF_LEN])
{
    unsigned char tmp[BUF_LEN];
    PACKET pkt;
    size_t len;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
               || !PACKET_copy_all(&pkt, tmp, BUF_LEN, &len)
               || len != BUF_LEN
               || memcmp(buf, tmp, BUF_LEN) != 0
               || PACKET_remaining(&pkt) != BUF_LEN
               || PACKET_copy_all(&pkt, tmp, BUF_LEN - 1, &len)) {
        fprintf(stderr, "test_PACKET_copy_bytes() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_memdup(unsigned char buf[BUF_LEN])
{
    unsigned char *data = NULL;
    size_t len;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_memdup(&pkt, &data, &len)
            ||  len != BUF_LEN
            ||  memcmp(data, PACKET_data(&pkt), len)
            || !PACKET_forward(&pkt, 10)
            || !PACKET_memdup(&pkt, &data, &len)
            ||  len != BUF_LEN - 10
            ||  memcmp(data, PACKET_data(&pkt), len)) {
        fprintf(stderr, "test_PACKET_memdup() failed\n");
        OPENSSL_free(data);
        return 0;
    }

    OPENSSL_free(data);
    return 1;
}

static int test_PACKET_strndup()
{
    char buf[10], buf2[10];
    char *data = NULL;
    PACKET pkt;

    memset(buf, 'x', 10);
    memset(buf2, 'y', 10);
    buf2[5] = '\0';

    if (       !PACKET_buf_init(&pkt, (unsigned char*)buf, 10)
            || !PACKET_strndup(&pkt, &data)
            ||  strlen(data) != 10
            ||  strncmp(data, buf, 10)
            || !PACKET_buf_init(&pkt, (unsigned char*)buf2, 10)
            || !PACKET_strndup(&pkt, &data)
            ||  strlen(data) != 5
            ||  strcmp(data, buf2)) {
        fprintf(stderr, "test_PACKET_strndup failed\n");
        OPENSSL_free(data);
        return 0;
    }

    OPENSSL_free(data);
    return 1;
}

static int test_PACKET_contains_zero_byte()
{
    char buf[10], buf2[10];
    PACKET pkt;

    memset(buf, 'x', 10);
    memset(buf2, 'y', 10);
    buf2[5] = '\0';

    if (       !PACKET_buf_init(&pkt, (unsigned char*)buf, 10)
            ||  PACKET_contains_zero_byte(&pkt)
            || !PACKET_buf_init(&pkt, (unsigned char*)buf2, 10)
            || !PACKET_contains_zero_byte(&pkt)) {
        fprintf(stderr, "test_PACKET_contains_zero_byte failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_forward(unsigned char buf[BUF_LEN])
{
    const unsigned char *byte;
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_forward(&pkt, 1)
            || !PACKET_get_bytes(&pkt, &byte, 1)
            ||  byte[0] != 4
            || !PACKET_forward(&pkt, BUF_LEN - 3)
            || !PACKET_get_bytes(&pkt, &byte, 1)
            ||  byte[0] != 0xfe) {
        fprintf(stderr, "test_PACKET_forward() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_buf_init()
{
    unsigned char buf[BUF_LEN];
    PACKET pkt;

    /* Also tests PACKET_remaining() */
    if (       !PACKET_buf_init(&pkt, buf, 4)
            ||  PACKET_remaining(&pkt) != 4
            || !PACKET_buf_init(&pkt, buf, BUF_LEN)
            ||  PACKET_remaining(&pkt) != BUF_LEN
            ||  PACKET_buf_init(&pkt, buf, -1)) {
        fprintf(stderr, "test_PACKET_buf_init() failed\n");
        return 0;
        }

    return 1;
}

static int test_PACKET_null_init()
{
    PACKET pkt;

    PACKET_null_init(&pkt);
    if (       PACKET_remaining(&pkt) != 0
            || PACKET_forward(&pkt, 1)) {
        fprintf(stderr, "test_PACKET_null_init() failed\n");
        return 0;
        }

    return 1;
}

static int test_PACKET_equal(unsigned char buf[BUF_LEN])
{
    PACKET pkt;

    if (       !PACKET_buf_init(&pkt, buf, 4)
            || !PACKET_equal(&pkt, buf, 4)
            ||  PACKET_equal(&pkt, buf + 1, 4)
            || !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_equal(&pkt, buf, BUF_LEN)
            ||  PACKET_equal(&pkt, buf, BUF_LEN - 1)
            ||  PACKET_equal(&pkt, buf, BUF_LEN + 1)
            ||  PACKET_equal(&pkt, buf, 0)) {
        fprintf(stderr, "test_PACKET_equal() failed\n");
        return 0;
        }

    return 1;
}

static int test_PACKET_get_length_prefixed_1()
{
    unsigned char buf[BUF_LEN];
    const size_t len = 16;
    unsigned int i;
    PACKET pkt, short_pkt, subpkt;

    buf[0] = len;
    for (i = 1; i < BUF_LEN; i++) {
        buf[i] = (i * 2) & 0xff;
    }

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_buf_init(&short_pkt, buf, len)
            || !PACKET_get_length_prefixed_1(&pkt, &subpkt)
            ||  PACKET_remaining(&subpkt) != len
            || !PACKET_get_net_2(&subpkt, &i)
            ||  i != 0x0204
            ||  PACKET_get_length_prefixed_1(&short_pkt, &subpkt)
            ||  PACKET_remaining(&short_pkt) != len) {
        fprintf(stderr, "test_PACKET_get_length_prefixed_1() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_length_prefixed_2()
{
    unsigned char buf[1024];
    const size_t len = 516;  /* 0x0204 */
    unsigned int i;
    PACKET pkt, short_pkt, subpkt;

    for (i = 1; i <= 1024; i++) {
        buf[i-1] = (i * 2) & 0xff;
    }

    if (       !PACKET_buf_init(&pkt, buf, 1024)
            || !PACKET_buf_init(&short_pkt, buf, len)
            || !PACKET_get_length_prefixed_2(&pkt, &subpkt)
            ||  PACKET_remaining(&subpkt) != len
            || !PACKET_get_net_2(&subpkt, &i)
            ||  i != 0x0608
            ||  PACKET_get_length_prefixed_2(&short_pkt, &subpkt)
            ||  PACKET_remaining(&short_pkt) != len) {
        fprintf(stderr, "test_PACKET_get_length_prefixed_2() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_get_length_prefixed_3()
{
    unsigned char buf[1024];
    const size_t len = 516;  /* 0x000204 */
    unsigned int i;
    PACKET pkt, short_pkt, subpkt;

    for (i = 0; i < 1024; i++) {
        buf[i] = (i * 2) & 0xff;
    }

    if (       !PACKET_buf_init(&pkt, buf, 1024)
            || !PACKET_buf_init(&short_pkt, buf, len)
            || !PACKET_get_length_prefixed_3(&pkt, &subpkt)
            ||  PACKET_remaining(&subpkt) != len
            || !PACKET_get_net_2(&subpkt, &i)
            ||  i != 0x0608
            ||  PACKET_get_length_prefixed_3(&short_pkt, &subpkt)
            ||  PACKET_remaining(&short_pkt) != len) {
        fprintf(stderr, "test_PACKET_get_length_prefixed_3() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_as_length_prefixed_1()
{
    unsigned char buf[BUF_LEN];
    const size_t len = 16;
    unsigned int i;
    PACKET pkt, exact_pkt, subpkt;

    buf[0] = len;
    for (i = 1; i < BUF_LEN; i++) {
        buf[i] = (i * 2) & 0xff;
    }

    if (       !PACKET_buf_init(&pkt, buf, BUF_LEN)
            || !PACKET_buf_init(&exact_pkt, buf, len + 1)
            ||  PACKET_as_length_prefixed_1(&pkt, &subpkt)
            ||  PACKET_remaining(&pkt) != BUF_LEN
            || !PACKET_as_length_prefixed_1(&exact_pkt, &subpkt)
            ||  PACKET_remaining(&exact_pkt) != 0
            ||  PACKET_remaining(&subpkt) != len) {
        fprintf(stderr, "test_PACKET_as_length_prefixed_1() failed\n");
        return 0;
    }

    return 1;
}

static int test_PACKET_as_length_prefixed_2()
{
    unsigned char buf[1024];
    const size_t len = 516;  /* 0x0204 */
    unsigned int i;
    PACKET pkt, exact_pkt, subpkt;

    for (i = 1; i <= 1024; i++) {
        buf[i-1] = (i * 2) & 0xff;
    }

    if (       !PACKET_buf_init(&pkt, buf, 1024)
            || !PACKET_buf_init(&exact_pkt, buf, len + 2)
            ||  PACKET_as_length_prefixed_2(&pkt, &subpkt)
            ||  PACKET_remaining(&pkt) != 1024
            || !PACKET_as_length_prefixed_2(&exact_pkt, &subpkt)
            ||  PACKET_remaining(&exact_pkt) != 0
            ||  PACKET_remaining(&subpkt) != len) {
        fprintf(stderr, "test_PACKET_as_length_prefixed_2() failed\n");
        return 0;
    }

    return 1;
}

int main(int argc, char **argv)
{
    unsigned char buf[BUF_LEN];
    unsigned int i;

    for (i=1; i<=BUF_LEN; i++) {
        buf[i-1] = (i * 2) & 0xff;
    }
    i = 0;

    if (       !test_PACKET_buf_init()
            || !test_PACKET_null_init()
            || !test_PACKET_remaining(buf)
            || !test_PACKET_end(buf)
            || !test_PACKET_equal(buf)
            || !test_PACKET_get_1(buf)
            || !test_PACKET_get_4(buf)
            || !test_PACKET_get_net_2(buf)
            || !test_PACKET_get_net_3(buf)
            || !test_PACKET_get_net_4(buf)
            || !test_PACKET_get_sub_packet(buf)
            || !test_PACKET_get_bytes(buf)
            || !test_PACKET_copy_bytes(buf)
            || !test_PACKET_copy_all(buf)
            || !test_PACKET_memdup(buf)
            || !test_PACKET_strndup()
            || !test_PACKET_contains_zero_byte()
            || !test_PACKET_forward(buf)
            || !test_PACKET_get_length_prefixed_1()
            || !test_PACKET_get_length_prefixed_2()
            || !test_PACKET_get_length_prefixed_3()
            || !test_PACKET_as_length_prefixed_1()
            || !test_PACKET_as_length_prefixed_2()) {
        return 1;
    }
    printf("PASS\n");
    return 0;
}