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#include "config.h"

#define LIBSSH_STATIC

#include "torture.h"
#include "libssh/libssh.h"
#include "libssh/session.h"
#include "libssh/crypto.h"
#include "libssh/buffer.h"
#include "libssh/socket.h"
#include "libssh/callbacks.h"
#include <sys/types.h>
#include <sys/socket.h>
#include "socket.c"

uint8_t test_data[]="AThis is test data. Use it to check the validity of packet functions";
uint8_t key[]="iekaeshoa7ooCie2shai8shahngee3ONsee3xoishooj0ojei6aeChieth1iraPh";
uint8_t iv[]="eixaxughoomah4ui7Aew3ohxuolaifuu";
uint8_t mac[]="thook2Jai0ahmahyae7ChuuruoPhee8Y";

static uint8_t *copy_data(uint8_t *data, size_t len){
    uint8_t *ret = malloc(len);
    assert_non_null(ret);
    memcpy(ret, data, len);
    return ret;
}

static SSH_PACKET_CALLBACK(copy_packet_data){
    uint8_t *response = user;
    size_t len = ssh_buffer_get_len(packet);
    (void)type;
    (void)session;

    if(len > 1024){
        len = 1024;
    }
    ssh_buffer_get_data(packet, response, len);

    return 0;
}

static void torture_packet(const char *cipher,
        const char *mac_type, size_t payload_len) {

    ssh_session session = ssh_new();
    int verbosity = torture_libssh_verbosity();
    struct ssh_crypto_struct *crypto;
    int rc;
    int sockets[2];
    uint8_t buffer[1024];
    uint8_t response[1024];
    size_t encrypted_packet_len;
    ssh_packet_callback callbacks[]={copy_packet_data};
    struct ssh_packet_callbacks_struct cb = {
            .start='A',
            .n_callbacks=1,
            .callbacks=callbacks,
            .user=response
    };

    assert_non_null(session);
    ssh_options_set(session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
    crypto = session->next_crypto;

    rc = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
    assert_int_equal(rc, 0);

    session->version = 2;
    crypto->kex_methods[SSH_KEX] = strdup("curve25519-sha256@libssh.org");
    crypto->kex_methods[SSH_HOSTKEYS] = strdup("ssh-rsa");
    crypto->kex_methods[SSH_CRYPT_C_S] = strdup(cipher);
    crypto->kex_methods[SSH_CRYPT_S_C] = strdup(cipher);
    crypto->kex_methods[SSH_MAC_C_S] = strdup(mac_type);
    crypto->kex_methods[SSH_MAC_S_C] = strdup(mac_type);
    crypto->kex_methods[SSH_COMP_C_S] = strdup("none");
    crypto->kex_methods[SSH_COMP_S_C] = strdup("none");
    crypto->kex_methods[SSH_LANG_C_S] = strdup("none");
    crypto->kex_methods[SSH_LANG_S_C] = strdup("none");
    rc = crypt_set_algorithms(session, 0);
    assert_int_equal(rc, SSH_OK);
    session->current_crypto = session->next_crypto;
    session->next_crypto = crypto_new();
    crypto->encryptkey = copy_data(key, sizeof(key));
    crypto->decryptkey = copy_data(key, sizeof(key));
    crypto->encryptIV = copy_data(iv, sizeof(iv));
    crypto->decryptIV = copy_data(iv, sizeof(iv));
    crypto->encryptMAC = copy_data(mac, sizeof(mac));
    crypto->decryptMAC = copy_data(mac, sizeof(mac));

    assert_non_null(session->out_buffer);
    ssh_buffer_add_data(session->out_buffer, test_data, payload_len);
    session->socket->fd_out = sockets[0];
    session->socket->fd_in = -2;
    session->socket->write_wontblock = 1;
    rc = ssh_packet_send(session);
    assert_int_equal(rc, SSH_OK);

    rc = recv(sockets[1], buffer, sizeof(buffer), 0);
    assert_true(rc > 0);
    encrypted_packet_len = rc;
    assert_in_range(encrypted_packet_len, payload_len + 4, payload_len + (32 * 3));
    rc = send(sockets[0], buffer, encrypted_packet_len, 0);
    assert_int_equal(rc, encrypted_packet_len);

    ssh_packet_set_callbacks(session, &cb);
    explicit_bzero(response, sizeof(response));
    rc = ssh_packet_socket_callback(buffer, encrypted_packet_len, session);
    assert_int_not_equal(rc, SSH_ERROR);
    if(payload_len > 0){
        assert_memory_equal(response, test_data+1, payload_len-1);
    }
    close(sockets[0]);
    close(sockets[1]);
    session->socket->fd_in = SSH_INVALID_SOCKET;
    session->socket->fd_out = SSH_INVALID_SOCKET;
    ssh_free(session);
}

static void torture_packet_aes128_ctr() {
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes128-ctr","hmac-sha1",i);
    }
}

static void torture_packet_aes192_ctr(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes192-ctr","hmac-sha1",i);
    }
}

static void torture_packet_aes256_ctr(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes256-ctr","hmac-sha1",i);
    }
}

static void torture_packet_aes128_cbc() {
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes128-cbc","hmac-sha1",i);
    }
}

static void torture_packet_aes192_cbc(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes192-cbc","hmac-sha1",i);
    }
}

static void torture_packet_aes256_cbc(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("aes256-cbc","hmac-sha1",i);
    }
}

static void torture_packet_3des_cbc(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("3des-cbc","hmac-sha1",i);
    }
}

static void torture_packet_chacha20(){
    int i;
    for (i=1;i<256;++i){
        torture_packet("chacha20-poly1305@openssh.com","none",i);
    }
}

int torture_run_tests(void) {
    int rc;
    struct CMUnitTest tests[] = {
        cmocka_unit_test(torture_packet_aes128_ctr),
        cmocka_unit_test(torture_packet_aes192_ctr),
        cmocka_unit_test(torture_packet_aes256_ctr),
        cmocka_unit_test(torture_packet_aes128_cbc),
        cmocka_unit_test(torture_packet_aes192_cbc),
        cmocka_unit_test(torture_packet_aes256_cbc),
        cmocka_unit_test(torture_packet_3des_cbc),
        cmocka_unit_test(torture_packet_chacha20)
    };

    ssh_init();
    torture_filter_tests(tests);
    rc = cmocka_run_group_tests(tests, NULL, NULL);
    ssh_finalize();
    return rc;
}