/*

 * Copyright 2016-2019 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 <openssl/ssl.h>

#include <openssl/evp.h>

#ifdef __VMS

# pragma names save

# pragma names as_is,shortened

#endif

#include "../ssl/ssl_local.h"

#ifdef __VMS

# pragma names restore

#endif

#include "testutil.h"

#define IVLEN   12

#define KEYLEN  16

/*

 * Based on the test vectors available in:

 * https://tools.ietf.org/html/draft-ietf-tls-tls13-vectors-06

 */

static unsigned char hs_start_hash[] = {

0xc6, 0xc9, 0x18, 0xad, 0x2f, 0x41, 0x99, 0xd5, 0x59, 0x8e, 0xaf, 0x01, 0x16,

0xcb, 0x7a, 0x5c, 0x2c, 0x14, 0xcb, 0x54, 0x78, 0x12, 0x18, 0x88, 0x8d, 0xb7,

0x03, 0x0d, 0xd5, 0x0d, 0x5e, 0x6d

};

static unsigned char hs_full_hash[] = {

0xf8, 0xc1, 0x9e, 0x8c, 0x77, 0xc0, 0x38, 0x79, 0xbb, 0xc8, 0xeb, 0x6d, 0x56,

0xe0, 0x0d, 0xd5, 0xd8, 0x6e, 0xf5, 0x59, 0x27, 0xee, 0xfc, 0x08, 0xe1, 0xb0,

0x02, 0xb6, 0xec, 0xe0, 0x5d, 0xbf

};

static unsigned char early_secret[] = {

0x33, 0xad, 0x0a, 0x1c, 0x60, 0x7e, 0xc0, 0x3b, 0x09, 0xe6, 0xcd, 0x98, 0x93,

0x68, 0x0c, 0xe2, 0x10, 0xad, 0xf3, 0x00, 0xaa, 0x1f, 0x26, 0x60, 0xe1, 0xb2,

0x2e, 0x10, 0xf1, 0x70, 0xf9, 0x2a

};

static unsigned char ecdhe_secret[] = {

0x81, 0x51, 0xd1, 0x46, 0x4c, 0x1b, 0x55, 0x53, 0x36, 0x23, 0xb9, 0xc2, 0x24,

0x6a, 0x6a, 0x0e, 0x6e, 0x7e, 0x18, 0x50, 0x63, 0xe1, 0x4a, 0xfd, 0xaf, 0xf0,

0xb6, 0xe1, 0xc6, 0x1a, 0x86, 0x42

};

static unsigned char handshake_secret[] = {

0x5b, 0x4f, 0x96, 0x5d, 0xf0, 0x3c, 0x68, 0x2c, 0x46, 0xe6, 0xee, 0x86, 0xc3,

0x11, 0x63, 0x66, 0x15, 0xa1, 0xd2, 0xbb, 0xb2, 0x43, 0x45, 0xc2, 0x52, 0x05,

0x95, 0x3c, 0x87, 0x9e, 0x8d, 0x06

};

static const char *client_hts_label = "c hs traffic";

static unsigned char client_hts[] = {

0xe2, 0xe2, 0x32, 0x07, 0xbd, 0x93, 0xfb, 0x7f, 0xe4, 0xfc, 0x2e, 0x29, 0x7a,

0xfe, 0xab, 0x16, 0x0e, 0x52, 0x2b, 0x5a, 0xb7, 0x5d, 0x64, 0xa8, 0x6e, 0x75,

0xbc, 0xac, 0x3f, 0x3e, 0x51, 0x03

};

static unsigned char client_hts_key[] = {

0x26, 0x79, 0xa4, 0x3e, 0x1d, 0x76, 0x78, 0x40, 0x34, 0xea, 0x17, 0x97, 0xd5,

0xad, 0x26, 0x49

};

static unsigned char client_hts_iv[] = {

0x54, 0x82, 0x40, 0x52, 0x90, 0xdd, 0x0d, 0x2f, 0x81, 0xc0, 0xd9, 0x42

};

static const char *server_hts_label = "s hs traffic";

static unsigned char server_hts[] = {

0x3b, 0x7a, 0x83, 0x9c, 0x23, 0x9e, 0xf2, 0xbf, 0x0b, 0x73, 0x05, 0xa0, 0xe0,

0xc4, 0xe5, 0xa8, 0xc6, 0xc6, 0x93, 0x30, 0xa7, 0x53, 0xb3, 0x08, 0xf5, 0xe3,

0xa8, 0x3a, 0xa2, 0xef, 0x69, 0x79

};

static unsigned char server_hts_key[] = {

0xc6, 0x6c, 0xb1, 0xae, 0xc5, 0x19, 0xdf, 0x44, 0xc9, 0x1e, 0x10, 0x99, 0x55,

0x11, 0xac, 0x8b

};

static unsigned char server_hts_iv[] = {

0xf7, 0xf6, 0x88, 0x4c, 0x49, 0x81, 0x71, 0x6c, 0x2d, 0x0d, 0x29, 0xa4

};

static unsigned char master_secret[] = {

0x5c, 0x79, 0xd1, 0x69, 0x42, 0x4e, 0x26, 0x2b, 0x56, 0x32, 0x03, 0x62, 0x7b,

0xe4, 0xeb, 0x51, 0x03, 0x3f, 0x58, 0x8c, 0x43, 0xc9, 0xce, 0x03, 0x73, 0x37,

0x2d, 0xbc, 0xbc, 0x01, 0x85, 0xa7

};

static const char *client_ats_label = "c ap traffic";

static unsigned char client_ats[] = {

0xe2, 0xf0, 0xdb, 0x6a, 0x82, 0xe8, 0x82, 0x80, 0xfc, 0x26, 0xf7, 0x3c, 0x89,

0x85, 0x4e, 0xe8, 0x61, 0x5e, 0x25, 0xdf, 0x28, 0xb2, 0x20, 0x79, 0x62, 0xfa,

0x78, 0x22, 0x26, 0xb2, 0x36, 0x26

};

static unsigned char client_ats_key[] = {

0x88, 0xb9, 0x6a, 0xd6, 0x86, 0xc8, 0x4b, 0xe5, 0x5a, 0xce, 0x18, 0xa5, 0x9c,

0xce, 0x5c, 0x87

};

static unsigned char client_ats_iv[] = {

0xb9, 0x9d, 0xc5, 0x8c, 0xd5, 0xff, 0x5a, 0xb0, 0x82, 0xfd, 0xad, 0x19

};

static const char *server_ats_label = "s ap traffic";

static unsigned char server_ats[] = {

0x5b, 0x73, 0xb1, 0x08, 0xd9, 0xac, 0x1b, 0x9b, 0x0c, 0x82, 0x48, 0xca, 0x39,

0x26, 0xec, 0x6e, 0x7b, 0xc4, 0x7e, 0x41, 0x17, 0x06, 0x96, 0x39, 0x87, 0xec,

0x11, 0x43, 0x5d, 0x30, 0x57, 0x19

};

static unsigned char server_ats_key[] = {

0xa6, 0x88, 0xeb, 0xb5, 0xac, 0x82, 0x6d, 0x6f, 0x42, 0xd4, 0x5c, 0x0c, 0xc4,

0x4b, 0x9b, 0x7d

};

static unsigned char server_ats_iv[] = {

0xc1, 0xca, 0xd4, 0x42, 0x5a, 0x43, 0x8b, 0x5d, 0xe7, 0x14, 0x83, 0x0a

};

/* Mocked out implementations of various functions */

int ssl3_digest_cached_records(SSL *s, int keep)

{

    return 1;

}

static int full_hash = 0;

/* Give a hash of the currently set handshake */

int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,

                       size_t *hashlen)

{

    if (sizeof(hs_start_hash) > outlen

            || sizeof(hs_full_hash) != sizeof(hs_start_hash))

        return 0;

    if (full_hash) {

        memcpy(out, hs_full_hash, sizeof(hs_full_hash));

        *hashlen = sizeof(hs_full_hash);

    } else {

        memcpy(out, hs_start_hash, sizeof(hs_start_hash));

        *hashlen = sizeof(hs_start_hash);

    }

    return 1;

}

const EVP_MD *ssl_handshake_md(SSL *s)

{

    return EVP_sha256();

}

void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl)

{

}

void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl)

{

}

int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,

                       const EVP_MD **md, int *mac_pkey_type,

                       size_t *mac_secret_size, SSL_COMP **comp, int use_etm)

{

    return 0;

}

int tls1_alert_code(int code)

{

    return code;

}

int ssl_log_secret(SSL *ssl,

                   const char *label,

                   const uint8_t *secret,

                   size_t secret_len)

{

    return 1;

}

const EVP_MD *ssl_md(int idx)

{

    return EVP_sha256();

}

void ossl_statem_fatal(SSL *s, int al, int func, int reason, const char *file,

                           int line)

{

}

int ossl_statem_export_allowed(SSL *s)

{

    return 1;

}

int ossl_statem_export_early_allowed(SSL *s)

{

    return 1;

}

/* End of mocked out code */

static int test_secret(SSL *s, unsigned char *prk,

                       const unsigned char *label, size_t labellen,

                       const unsigned char *ref_secret,

                       const unsigned char *ref_key, const unsigned char *ref_iv)

{

    size_t hashsize;

    unsigned char gensecret[EVP_MAX_MD_SIZE];

    unsigned char hash[EVP_MAX_MD_SIZE];

    unsigned char key[KEYLEN];

    unsigned char iv[IVLEN];

    const EVP_MD *md = ssl_handshake_md(s);

    if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashsize)) {

        TEST_error("Failed to get hash");

        return 0;

    }

    if (!tls13_hkdf_expand(s, md, prk, label, labellen, hash, hashsize,

                           gensecret, hashsize, 1)) {

        TEST_error("Secret generation failed");

        return 0;

    }

    if (!TEST_mem_eq(gensecret, hashsize, ref_secret, hashsize))

        return 0;

    if (!tls13_derive_key(s, md, gensecret, key, KEYLEN)) {

        TEST_error("Key generation failed");

        return 0;

    }

    if (!TEST_mem_eq(key, KEYLEN, ref_key, KEYLEN))

        return 0;

    if (!tls13_derive_iv(s, md, gensecret, iv, IVLEN)) {

        TEST_error("IV generation failed");

        return 0;

    }

    if (!TEST_mem_eq(iv, IVLEN, ref_iv, IVLEN))

        return 0;

    return 1;

}

static int test_handshake_secrets(void)

{

    SSL_CTX *ctx = NULL;

    SSL *s = NULL;

    int ret = 0;

    size_t hashsize;

    unsigned char out_master_secret[EVP_MAX_MD_SIZE];

    size_t master_secret_length;

    ctx = SSL_CTX_new(TLS_method());

    if (!TEST_ptr(ctx))

        goto err;

    s = SSL_new(ctx);

    if (!TEST_ptr(s ))

        goto err;

    s->session = SSL_SESSION_new();

    if (!TEST_ptr(s->session))

        goto err;

    if (!TEST_true(tls13_generate_secret(s, ssl_handshake_md(s), NULL, NULL, 0,

                                         (unsigned char *)&s->early_secret))) {

        TEST_info("Early secret generation failed");

        goto err;

    }

    if (!TEST_mem_eq(s->early_secret, sizeof(early_secret),

                     early_secret, sizeof(early_secret))) {

        TEST_info("Early secret does not match");

        goto err;

    }

    if (!TEST_true(tls13_generate_handshake_secret(s, ecdhe_secret,

                                                   sizeof(ecdhe_secret)))) {

        TEST_info("Handshake secret generation failed");

        goto err;

    }

    if (!TEST_mem_eq(s->handshake_secret, sizeof(handshake_secret),

                     handshake_secret, sizeof(handshake_secret)))

        goto err;

    hashsize = EVP_MD_size(ssl_handshake_md(s));

    if (!TEST_size_t_eq(sizeof(client_hts), hashsize))

        goto err;

    if (!TEST_size_t_eq(sizeof(client_hts_key), KEYLEN))

        goto err;

    if (!TEST_size_t_eq(sizeof(client_hts_iv), IVLEN))

        goto err;

    if (!TEST_true(test_secret(s, s->handshake_secret,

                               (unsigned char *)client_hts_label,

                               strlen(client_hts_label), client_hts,

                               client_hts_key, client_hts_iv))) {

        TEST_info("Client handshake secret test failed");

        goto err;

    }

    if (!TEST_size_t_eq(sizeof(server_hts), hashsize))

        goto err;

    if (!TEST_size_t_eq(sizeof(server_hts_key), KEYLEN))

        goto err;

    if (!TEST_size_t_eq(sizeof(server_hts_iv), IVLEN))

        goto err;

    if (!TEST_true(test_secret(s, s->handshake_secret,

                               (unsigned char *)server_hts_label,

                               strlen(server_hts_label), server_hts,

                               server_hts_key, server_hts_iv))) {

        TEST_info("Server handshake secret test failed");

        goto err;

    }

    /*

     * Ensure the mocked out ssl_handshake_hash() returns the full handshake

     * hash.

     */

    full_hash = 1;

    if (!TEST_true(tls13_generate_master_secret(s, out_master_secret,

                                                s->handshake_secret, hashsize,

                                                &master_secret_length))) {

        TEST_info("Master secret generation failed");

        goto err;

    }

    if (!TEST_mem_eq(out_master_secret, master_secret_length,

                     master_secret, sizeof(master_secret))) {

        TEST_info("Master secret does not match");

        goto err;

    }

    if (!TEST_size_t_eq(sizeof(client_ats), hashsize))

        goto err;

    if (!TEST_size_t_eq(sizeof(client_ats_key), KEYLEN))

        goto err;

    if (!TEST_size_t_eq(sizeof(client_ats_iv), IVLEN))

        goto err;

    if (!TEST_true(test_secret(s, out_master_secret,

                               (unsigned char *)client_ats_label,

                               strlen(client_ats_label), client_ats,

                               client_ats_key, client_ats_iv))) {

        TEST_info("Client application data secret test failed");

        goto err;

    }

    if (!TEST_size_t_eq(sizeof(server_ats), hashsize))

        goto err;

    if (!TEST_size_t_eq(sizeof(server_ats_key), KEYLEN))

        goto err;

    if (!TEST_size_t_eq(sizeof(server_ats_iv), IVLEN))

        goto err;

    if (!TEST_true(test_secret(s, out_master_secret,

                               (unsigned char *)server_ats_label,

                               strlen(server_ats_label), server_ats,

                               server_ats_key, server_ats_iv))) {

        TEST_info("Server application data secret test failed");

        goto err;

    }

    ret = 1;

 err:

    SSL_free(s);

    SSL_CTX_free(ctx);

    return ret;

}

int setup_tests(void)

{

    ADD_TEST(test_handshake_secrets);

    return 1;

}