/*

 * Copyright (C) 2004-2015 Free Software Foundation, Inc.

 * Copyright (C) 2013 Adam Sampson <ats@offog.org>

 * Copyright (C) 2015 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * GnuTLS is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * GnuTLS is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GnuTLS; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

/* Tests whether memory input to ciphers are properly aligned */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#if defined(_WIN32)

/* socketpair isn't supported on Win32. */

int main(int argc, char **argv)

{

	exit(77);

}

#else

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#if !defined(_WIN32)

#include <sys/wait.h>

#endif

#include <unistd.h>

#include <gnutls/gnutls.h>

#include <gnutls/crypto.h>

#include <nettle/aes.h>

#include <nettle/cbc.h>

#include <nettle/gcm.h>

#include <assert.h>

#include "utils.h"

#include "ex-session-info.c"

#include "ex-x509-info.c"

pid_t child;

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,

		str);

}

/* A very basic TLS client, with anonymous authentication.

 */

#define MAX_BUF 1024

#define MSG "Hello TLS"

static unsigned char ca_pem[] =

    "-----BEGIN CERTIFICATE-----\n"

    "MIIB5zCCAVKgAwIBAgIERiYdJzALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"

    "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTExWhcNMDgwNDE3MTMyOTExWjAZMRcw\n"

    "FQYDVQQDEw5HbnVUTFMgdGVzdCBDQTCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA\n"

    "vuyYeh1vfmslnuggeEKgZAVmQ5ltSdUY7H25WGSygKMUYZ0KT74v8C780qtcNt9T\n"

    "7EPH/N6RvB4BprdssgcQLsthR3XKA84jbjjxNCcaGs33lvOz8A1nf8p3hD+cKfRi\n"

    "kfYSW2JazLrtCC4yRCas/SPOUxu78of+3HiTfFm/oXUCAwEAAaNDMEEwDwYDVR0T\n"

    "AQH/BAUwAwEB/zAPBgNVHQ8BAf8EBQMDBwQAMB0GA1UdDgQWBBTpPBz7rZJu5gak\n"

    "Viyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAiaIRqGfp1jPpNeVhABK60SU0KIAy\n"

    "njuu7kHq5peUgYn8Jd9zNzExBOEp1VOipGsf6G66oQAhDFp2o8zkz7ZH71zR4HEW\n"

    "KoX6n5Emn6DvcEH/9pAhnGxNHJAoS7czTKv/JDZJhkqHxyrE1fuLsg5Qv25DTw7+\n"

    "PfqUpIhz5Bbm7J4=\n" "-----END CERTIFICATE-----\n";

const gnutls_datum_t ca = { ca_pem, sizeof(ca_pem) };

static unsigned char cert_pem[] =

    "-----BEGIN CERTIFICATE-----\n"

    "MIICHjCCAYmgAwIBAgIERiYdNzALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"

    "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTI3WhcNMDgwNDE3MTMyOTI3WjAdMRsw\n"

    "GQYDVQQDExJHbnVUTFMgdGVzdCBjbGllbnQwgZwwCwYJKoZIhvcNAQEBA4GMADCB\n"

    "iAKBgLtmQ/Xyxde2jMzF3/WIO7HJS2oOoa0gUEAIgKFPXKPQ+GzP5jz37AR2ExeL\n"

    "ZIkiW8DdU3w77XwEu4C5KL6Om8aOoKUSy/VXHqLnu7czSZ/ju0quak1o/8kR4jKN\n"

    "zj2AC41179gAgY8oBAOgIo1hBAf6tjd9IQdJ0glhaZiQo1ipAgMBAAGjdjB0MAwG\n"

    "A1UdEwEB/wQCMAAwEwYDVR0lBAwwCgYIKwYBBQUHAwIwDwYDVR0PAQH/BAUDAweg\n"

    "ADAdBgNVHQ4EFgQUTLkKm/odNON+3svSBxX+odrLaJEwHwYDVR0jBBgwFoAU6Twc\n"

    "+62SbuYGpFYsouHAUyfI8pUwCwYJKoZIhvcNAQEFA4GBALujmBJVZnvaTXr9cFRJ\n"

    "jpfc/3X7sLUsMvumcDE01ls/cG5mIatmiyEU9qI3jbgUf82z23ON/acwJf875D3/\n"

    "U7jyOsBJ44SEQITbin2yUeJMIm1tievvdNXBDfW95AM507ShzP12sfiJkJfjjdhy\n"

    "dc8Siq5JojruiMizAf0pA7in\n" "-----END CERTIFICATE-----\n";

const gnutls_datum_t cert = { cert_pem, sizeof(cert_pem) };

static unsigned char key_pem[] =

    "-----BEGIN RSA PRIVATE KEY-----\n"

    "MIICXAIBAAKBgQC7ZkP18sXXtozMxd/1iDuxyUtqDqGtIFBACIChT1yj0Phsz+Y8\n"

    "9+wEdhMXi2SJIlvA3VN8O+18BLuAuSi+jpvGjqClEsv1Vx6i57u3M0mf47tKrmpN\n"

    "aP/JEeIyjc49gAuNde/YAIGPKAQDoCKNYQQH+rY3fSEHSdIJYWmYkKNYqQIDAQAB\n"

    "AoGADpmARG5CQxS+AesNkGmpauepiCz1JBF/JwnyiX6vEzUh0Ypd39SZztwrDxvF\n"

    "PJjQaKVljml1zkJpIDVsqvHdyVdse8M+Qn6hw4x2p5rogdvhhIL1mdWo7jWeVJTF\n"

    "RKB7zLdMPs3ySdtcIQaF9nUAQ2KJEvldkO3m/bRJFEp54k0CQQDYy+RlTmwRD6hy\n"

    "7UtMjR0H3CSZJeQ8svMCxHLmOluG9H1UKk55ZBYfRTsXniqUkJBZ5wuV1L+pR9EK\n"

    "ca89a+1VAkEA3UmBelwEv2u9cAU1QjKjmwju1JgXbrjEohK+3B5y0ESEXPAwNQT9\n"

    "TrDM1m9AyxYTWLxX93dI5QwNFJtmbtjeBQJARSCWXhsoaDRG8QZrCSjBxfzTCqZD\n"

    "ZXtl807ymCipgJm60LiAt0JLr4LiucAsMZz6+j+quQbSakbFCACB8SLV1QJBAKZQ\n"

    "YKf+EPNtnmta/rRKKvySsi3GQZZN+Dt3q0r094XgeTsAqrqujVNfPhTMeP4qEVBX\n"

    "/iVX2cmMTSh3w3z8MaECQEp0XJWDVKOwcTW6Ajp9SowtmiZ3YDYo1LF9igb4iaLv\n"

    "sWZGfbnU3ryjvkb6YuFjgtzbZDZHWQCo8/cOtOBmPdk=\n"

    "-----END RSA PRIVATE KEY-----\n";

const gnutls_datum_t key = { key_pem, sizeof(key_pem) };

struct myaes_ctx {

	struct aes_ctx aes;

	unsigned char iv[16];

	int enc;

};

static int

myaes_init(gnutls_cipher_algorithm_t algorithm, void **_ctx, int enc)

{

	/* we use key size to distinguish */

	if (algorithm != GNUTLS_CIPHER_AES_128_CBC

	    && algorithm != GNUTLS_CIPHER_AES_192_CBC

	    && algorithm != GNUTLS_CIPHER_AES_256_CBC)

		return GNUTLS_E_INVALID_REQUEST;

	*_ctx = calloc(1, sizeof(struct myaes_ctx));

	if (*_ctx == NULL) {

		return GNUTLS_E_MEMORY_ERROR;

	}

	((struct myaes_ctx *) (*_ctx))->enc = enc;

	return 0;

}

static int

myaes_setkey(void *_ctx, const void *userkey, size_t keysize)

{

	struct myaes_ctx *ctx = _ctx;

	if (ctx->enc)

		aes_set_encrypt_key(&ctx->aes, keysize, userkey);

	else

		aes_set_decrypt_key(&ctx->aes, keysize, userkey);

	return 0;

}

static int myaes_setiv(void *_ctx, const void *iv, size_t iv_size)

{

	struct myaes_ctx *ctx = _ctx;

	memcpy(ctx->iv, iv, 16);

	return 0;

}

static int

myaes_encrypt(void *_ctx, const void *src, size_t src_size,

	    void *dst, size_t dst_size)

{

	struct myaes_ctx *ctx = _ctx;

#if 0 /* this is under the control of the caller */

	if (((unsigned long)src)%16 != 0) {

		fail("encrypt: source is not 16-byte aligned: %lu\n", ((unsigned long)src)%16);

	}

#endif

	if (((unsigned long)dst)%16 != 0) {

		fail("encrypt: dest is not 16-byte aligned: %lu\n", ((unsigned long)dst)%16);

	}

	cbc_encrypt(&ctx->aes, (nettle_cipher_func*)aes_encrypt, 16, ctx->iv, src_size, dst, src);

	return 0;

}

static int

myaes_decrypt(void *_ctx, const void *src, size_t src_size,

	    void *dst, size_t dst_size)

{

	struct myaes_ctx *ctx = _ctx;

	if (((unsigned long)src)%16 != 0) {

		fail("decrypt: source is not 16-byte aligned: %lu\n", ((unsigned long)src)%16);

	}

#if 0 /* this is under the control of the caller */

	if (((unsigned long)dst)%16 != 0) {

		fail("decrypt: dest is not 16-byte aligned: %lu\n", ((unsigned long)dst)%16);

	}

#endif

	cbc_decrypt(&ctx->aes, (nettle_cipher_func*)aes_decrypt, 16, ctx->iv, src_size, dst, src);

	return 0;

}

static void myaes_deinit(void *_ctx)

{

	free(_ctx);

}

static void client(int sd, const char *prio)

{

	int ret, ii;

	gnutls_session_t session;

	char buffer[MAX_BUF + 1];

	gnutls_certificate_credentials_t xcred;

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(6);

	gnutls_certificate_allocate_credentials(&xcred);

	/* sets the trusted cas file

	 */

	gnutls_certificate_set_x509_trust_mem(xcred, &ca,

					      GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_x509_key_mem(xcred, &cert, &key,

					    GNUTLS_X509_FMT_PEM);

	/* Initialize TLS session

	 */

	gnutls_init(&session, GNUTLS_CLIENT);

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	/* put the x509 credentials to the current session

	 */

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);

	gnutls_transport_set_int(session, sd);

	/* Perform the TLS handshake

	 */

	ret = gnutls_handshake(session);

	if (ret < 0) {

		fail("client: Handshake failed\n");

		gnutls_perror(ret);

		goto end;

	} else if (debug) {

		success("client: Handshake was completed\n");

	}

	if (debug)

		success("client: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	/* see the Getting peer's information example */

	if (debug)

		print_info(session);

	ret = gnutls_record_send(session, MSG, strlen(MSG));

	if (ret == strlen(MSG)) {

		if (debug)

			success("client: sent record.\n");

	} else {

		fail("client: failed to send record.\n");

		gnutls_perror(ret);

		goto end;

	}

	ret = gnutls_record_recv(session, buffer, MAX_BUF);

	if (debug)

		success("client: recv returned %d.\n", ret);

	if (ret == GNUTLS_E_REHANDSHAKE) {

		if (debug)

			success("client: doing handshake!\n");

		ret = gnutls_handshake(session);

		if (ret == 0) {

			if (debug)

				success

				    ("client: handshake complete, reading again.\n");

			ret = gnutls_record_recv(session, buffer, MAX_BUF);

		} else {

			fail("client: handshake failed.\n");

		}

	}

	if (ret == 0) {

		if (debug)

			success

			    ("client: Peer has closed the TLS connection\n");

		goto end;

	} else if (ret < 0) {

		fail("client: Error: %s\n", gnutls_strerror(ret));

		goto end;

	}

	if (debug) {

		printf("- Received %d bytes: ", ret);

		for (ii = 0; ii < ret; ii++) {

			fputc(buffer[ii], stdout);

		}

		fputs("\n", stdout);

	}

	gnutls_bye(session, GNUTLS_SHUT_RDWR);

      end:

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(xcred);

}

/* This is a sample TLS 1.0 echo server, using X.509 authentication.

 */

#define MAX_BUF 1024

/* These are global */

static unsigned char server_cert_pem[] =

    "-----BEGIN CERTIFICATE-----\n"

    "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"

    "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"

    "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"

    "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"

    "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"

    "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"

    "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"

    "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"

    "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"

    "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"

    "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"

    "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"

    "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";

const gnutls_datum_t server_cert = { server_cert_pem,

	sizeof(server_cert_pem)

};

static unsigned char server_key_pem[] =

    "-----BEGIN RSA PRIVATE KEY-----\n"

    "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"

    "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"

    "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"

    "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"

    "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"

    "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"

    "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"

    "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"

    "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"

    "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"

    "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"

    "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"

    "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"

    "-----END RSA PRIVATE KEY-----\n";

const gnutls_datum_t server_key = { server_key_pem,

	sizeof(server_key_pem)

};

static void server(int sd, const char *prio)

{

	gnutls_certificate_credentials_t x509_cred;

	int ret;

	gnutls_session_t session;

	char buffer[MAX_BUF + 1];

	/* this must be called once in the program

	 */

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(6);

	gnutls_certificate_allocate_credentials(&x509_cred);

	gnutls_certificate_set_x509_trust_mem(x509_cred, &ca,

					      GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,

					    &server_key,

					    GNUTLS_X509_FMT_PEM);

	if (debug)

		success("Launched, generating DH parameters...\n");

	gnutls_init(&session, GNUTLS_SERVER);

	/* avoid calling all the priority functions, since the defaults

	 * are adequate.

	 */

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, sd);

	ret = gnutls_handshake(session);

	if (ret < 0) {

		close(sd);

		gnutls_deinit(session);

		fail("server: Handshake has failed (%s)\n\n",

		     gnutls_strerror(ret));

		return;

	}

	if (debug) {

		success("server: Handshake was completed\n");

		success("server: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	}

	/* see the Getting peer's information example */

	if (debug)

		print_info(session);

	for (;;) {

		memset(buffer, 0, MAX_BUF + 1);

		ret = gnutls_record_recv(session, buffer, MAX_BUF);

		if (ret == 0) {

			if (debug)

				success

				    ("server: Peer has closed the GnuTLS connection\n");

			break;

		} else if (ret < 0) {

			fail("server: Received corrupted data(%d). Closing...\n", ret);

			break;

		} else if (ret > 0) {

			/* echo data back to the client

			 */

			gnutls_record_send(session, buffer,

					   strlen(buffer));

		}

	}

	/* do not wait for the peer to close the connection.

	 */

	gnutls_bye(session, GNUTLS_SHUT_WR);

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	if (debug)

		success("server: finished\n");

}

static

void start(const char *prio)

{

	int sockets[2];

	int err;

	err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);

	if (err == -1) {

		perror("socketpair");

		fail("socketpair failed\n");

		return;

	}

	child = fork();

	if (child < 0) {

		perror("fork");

		fail("fork");

		return;

	}

	if (child) {

		int status;

		server(sockets[0], prio);

		wait(&status);

		check_wait_status(status);

	} else {

		client(sockets[1], prio);

		exit(0);

	}

}

void doit(void)

{

	int ret;

	global_init();

	ret = gnutls_crypto_register_cipher(GNUTLS_CIPHER_AES_128_CBC, 1,

		myaes_init,

		myaes_setkey,

		myaes_setiv,

		myaes_encrypt,

		myaes_decrypt,

		myaes_deinit);

	if (ret < 0) {

		fail("%d: cannot register cipher\n", __LINE__);

	}

	start("NORMAL:-CIPHER-ALL:+AES-128-CBC:-VERS-ALL:+VERS-TLS1.1");

	start("NORMAL:-CIPHER-ALL:+AES-128-CBC:-VERS-ALL:+VERS-TLS1.2");

	gnutls_global_deinit();

}

#endif				/* _WIN32 */