path: root/lib/libssl/t1_enc.c

/* ssl/t1_enc.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#include <stdio.h>
#include "ssl_locl.h"
#ifndef OPENSSL_NO_COMP
#include <openssl/comp.h>
#endif
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/md5.h>
#include <openssl/rand.h>
#ifdef KSSL_DEBUG
#include <openssl/des.h>
#endif

/* seed1 through seed5 are virtually concatenated */
static int
tls1_P_hash(const EVP_MD *md, const unsigned char *sec, int sec_len,
    const void *seed1, int seed1_len, const void *seed2, int seed2_len,
    const void *seed3, int seed3_len, const void *seed4, int seed4_len,
    const void *seed5, int seed5_len, unsigned char *out, int olen)
{
	int chunk;
	size_t j;
	EVP_MD_CTX ctx, ctx_tmp;
	EVP_PKEY *mac_key;
	unsigned char A1[EVP_MAX_MD_SIZE];
	size_t A1_len;
	int ret = 0;

	chunk = EVP_MD_size(md);
	OPENSSL_assert(chunk >= 0);

	EVP_MD_CTX_init(&ctx);
	EVP_MD_CTX_init(&ctx_tmp);
	EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
	EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
	mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
	if (!mac_key)
		goto err;
	if (!EVP_DigestSignInit(&ctx, NULL, md, NULL, mac_key))
		goto err;
	if (!EVP_DigestSignInit(&ctx_tmp, NULL, md, NULL, mac_key))
		goto err;
	if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
		goto err;
	if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
		goto err;
	if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
		goto err;
	if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
		goto err;
	if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
		goto err;
	if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
		goto err;

	for (;;) {
		/* Reinit mac contexts */
		if (!EVP_DigestSignInit(&ctx, NULL, md, NULL, mac_key))
			goto err;
		if (!EVP_DigestSignInit(&ctx_tmp, NULL, md, NULL, mac_key))
			goto err;
		if (!EVP_DigestSignUpdate(&ctx, A1, A1_len))
			goto err;
		if (!EVP_DigestSignUpdate(&ctx_tmp, A1, A1_len))
			goto err;
		if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
			goto err;
		if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
			goto err;
		if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
			goto err;
		if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
			goto err;
		if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
			goto err;

		if (olen > chunk) {
			if (!EVP_DigestSignFinal(&ctx, out, &j))
				goto err;
			out += j;
			olen -= j;
			/* calc the next A1 value */
			if (!EVP_DigestSignFinal(&ctx_tmp, A1, &A1_len))
				goto err;
		} else {
			/* last one */
			if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
				goto err;
			memcpy(out, A1, olen);
			break;
		}
	}
	ret = 1;

err:
	EVP_PKEY_free(mac_key);
	EVP_MD_CTX_cleanup(&ctx);
	EVP_MD_CTX_cleanup(&ctx_tmp);
	OPENSSL_cleanse(A1, sizeof(A1));
	return ret;
}

/* seed1 through seed5 are virtually concatenated */
static int
tls1_PRF(long digest_mask, const void *seed1, int seed1_len, const void *seed2,
    int seed2_len, const void *seed3, int seed3_len, const void *seed4,
    int seed4_len, const void *seed5, int seed5_len, const unsigned char *sec,
    int slen, unsigned char *out1, unsigned char *out2, int olen)
{
	int len, i, idx, count;
	const unsigned char *S1;
	long m;
	const EVP_MD *md;
	int ret = 0;

	/* Count number of digests and partition sec evenly */
	count = 0;
	for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
		if ((m << TLS1_PRF_DGST_SHIFT)
			& digest_mask) count++;
	}
	len = slen/count;
	if (count == 1)
		slen = 0;
	S1 = sec;
	memset(out1, 0, olen);
	for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
		if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) {
			if (!md) {
				SSLerr(SSL_F_TLS1_PRF,
				    SSL_R_UNSUPPORTED_DIGEST_TYPE);
				goto err;

			}
			if (!tls1_P_hash(md , S1, len + (slen&1), seed1,
			    seed1_len, seed2, seed2_len, seed3, seed3_len,
			    seed4, seed4_len, seed5, seed5_len, out2, olen))
				goto err;
			S1 += len;
			for (i = 0; i < olen; i++) {
				out1[i] ^= out2[i];
			}
		}
	}
	ret = 1;

err:
	return ret;
}

static int
tls1_generate_key_block(SSL *s, unsigned char *km, unsigned char *tmp, int num)
{
	int ret;

	ret = tls1_PRF(ssl_get_algorithm2(s),
	    TLS_MD_KEY_EXPANSION_CONST, TLS_MD_KEY_EXPANSION_CONST_SIZE,
	    s->s3->server_random, SSL3_RANDOM_SIZE,
	    s->s3->client_random, SSL3_RANDOM_SIZE,
	    NULL, 0, NULL, 0,
	    s->session->master_key, s->session->master_key_length,
	    km, tmp, num);
#ifdef KSSL_DEBUG
	printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
	    s->session->master_key_length);
	{
		int i;
		for (i = 0; i < s->session->master_key_length; i++) {
			printf("%02X", s->session->master_key[i]);
		}
		printf("\n");
	}
#endif    /* KSSL_DEBUG */
	return ret;
}

int
tls1_change_cipher_state(SSL *s, int which)
{
	static const unsigned char empty[]="";
	unsigned char *p, *mac_secret;
	unsigned char *exp_label;
	unsigned char tmp1[EVP_MAX_KEY_LENGTH];
	unsigned char tmp2[EVP_MAX_KEY_LENGTH];
	unsigned char iv1[EVP_MAX_IV_LENGTH*2];
	unsigned char iv2[EVP_MAX_IV_LENGTH*2];
	unsigned char *ms, *key, *iv;
	int client_write;
	EVP_CIPHER_CTX *dd;
	const EVP_CIPHER *c;
#ifndef OPENSSL_NO_COMP
	const SSL_COMP *comp;
#endif
	const EVP_MD *m;
	int mac_type;
	int *mac_secret_size;
	EVP_MD_CTX *mac_ctx;
	EVP_PKEY *mac_key;
	int is_export, n, i, j, k, exp_label_len, cl;
	int reuse_dd = 0;

	is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
	c = s->s3->tmp.new_sym_enc;
	m = s->s3->tmp.new_hash;
	mac_type = s->s3->tmp.new_mac_pkey_type;
#ifndef OPENSSL_NO_COMP
	comp = s->s3->tmp.new_compression;
#endif

#ifdef KSSL_DEBUG
	printf("tls1_change_cipher_state(which= %d) w/\n", which);
	printf("\talg= %ld/%ld, comp= %p\n",
	    s->s3->tmp.new_cipher->algorithm_mkey,
	    s->s3->tmp.new_cipher->algorithm_auth,
	    comp);
	printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
	printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
	    c->nid, c->block_size, c->key_len, c->iv_len);
	printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
	{
		int i;
		for (i = 0; i < s->s3->tmp.key_block_length; i++)
			printf("%02x", s->s3->tmp.key_block[i]);  printf("\n");
	}
#endif	/* KSSL_DEBUG */

	if (which & SSL3_CC_READ) {
		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
			s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
		else
			s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;

		if (s->enc_read_ctx != NULL)
			reuse_dd = 1;
		else if ((s->enc_read_ctx = malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
			goto err;
		else {
			/* make sure it's intialized in case we exit later with an error */
			EVP_CIPHER_CTX_init(s->enc_read_ctx);
		}
		dd = s->enc_read_ctx;
		mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
#ifndef OPENSSL_NO_COMP
		if (s->expand != NULL) {
			COMP_CTX_free(s->expand);
			s->expand = NULL;
		}
		if (comp != NULL) {
			s->expand = COMP_CTX_new(comp->method);
			if (s->expand == NULL) {
				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, SSL_R_COMPRESSION_LIBRARY_ERROR);
				goto err2;
			}
			if (s->s3->rrec.comp == NULL)
				s->s3->rrec.comp = malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
			if (s->s3->rrec.comp == NULL)
				goto err;
		}
#endif
		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
		if (s->version != DTLS1_VERSION)
			memset(&(s->s3->read_sequence[0]), 0, 8);
		mac_secret = &(s->s3->read_mac_secret[0]);
		mac_secret_size = &(s->s3->read_mac_secret_size);
	} else {
		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
			s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
		else
			s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
		if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
			reuse_dd = 1;
		else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
			goto err;
		dd = s->enc_write_ctx;
		if (SSL_IS_DTLS(s)) {
			mac_ctx = EVP_MD_CTX_create();
			if (!mac_ctx)
				goto err;
			s->write_hash = mac_ctx;
		} else
			mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
#ifndef OPENSSL_NO_COMP
		if (s->compress != NULL) {
			COMP_CTX_free(s->compress);
			s->compress = NULL;
		}
		if (comp != NULL) {
			s->compress = COMP_CTX_new(comp->method);
			if (s->compress == NULL) {
				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, SSL_R_COMPRESSION_LIBRARY_ERROR);
				goto err2;
			}
		}
#endif
		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
		if (s->version != DTLS1_VERSION)
			memset(&(s->s3->write_sequence[0]), 0, 8);
		mac_secret = &(s->s3->write_mac_secret[0]);
		mac_secret_size = &(s->s3->write_mac_secret_size);
	}

	if (reuse_dd)
		EVP_CIPHER_CTX_cleanup(dd);

	p = s->s3->tmp.key_block;
	i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;

	cl = EVP_CIPHER_key_length(c);
	j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
	    cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
	/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
	/* If GCM mode only part of IV comes from PRF */
	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
		k = EVP_GCM_TLS_FIXED_IV_LEN;
	else
		k = EVP_CIPHER_iv_length(c);
	if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
	    (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
		ms = &(p[0]);
		n = i + i;
		key = &(p[n]);
		n += j + j;
		iv = &(p[n]);
		n += k + k;
		exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
		exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
		client_write = 1;
	} else {
		n = i;
		ms = &(p[n]);
		n += i + j;
		key = &(p[n]);
		n += j + k;
		iv = &(p[n]);
		n += k;
		exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
		exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
		client_write = 0;
	}

	if (n > s->s3->tmp.key_block_length) {
		SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
		goto err2;
	}

	memcpy(mac_secret, ms, i);

	if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
		mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
		    mac_secret, *mac_secret_size);
		EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key);
		EVP_PKEY_free(mac_key);
	}
#ifdef TLS_DEBUG
	printf("which = %04X\nmac key=", which);
	{ int z; for (z = 0; z<i; z++) printf("%02X%c", ms[z],((z+1)%16)?' ':'\n'); }
#endif
	if (is_export) {
		/* In here I set both the read and write key/iv to the
		 * same value since only the correct one will be used :-).
		 */
		if (!tls1_PRF(ssl_get_algorithm2(s),
		    exp_label, exp_label_len,
		    s->s3->client_random, SSL3_RANDOM_SIZE,
		    s->s3->server_random, SSL3_RANDOM_SIZE,
		    NULL, 0, NULL, 0, key, j, tmp1, tmp2,
		    EVP_CIPHER_key_length(c)))
			goto err2;
		key = tmp1;

		if (k > 0) {
			if (!tls1_PRF(ssl_get_algorithm2(s),
			    TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE,
			    s->s3->client_random, SSL3_RANDOM_SIZE,
			    s->s3->server_random, SSL3_RANDOM_SIZE,
			    NULL, 0, NULL, 0, empty, 0, iv1, iv2, k*2))
				goto err2;
			if (client_write)
				iv = iv1;
			else
				iv = &(iv1[k]);
		}
	}

#ifdef KSSL_DEBUG
	{
		int i;
		printf("EVP_CipherInit_ex(dd, c, key=, iv=, which)\n");
		printf("\tkey= "); for (i = 0; i<c->key_len; i++) printf("%02x", key[i]);
		printf("\n");
		printf("\t iv= "); for (i = 0; i<c->iv_len; i++) printf("%02x", iv[i]);
		printf("\n");
	}
#endif	/* KSSL_DEBUG */

	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
		EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE));
		EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
	} else
		EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE));

	/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
	if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
		EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
		    *mac_secret_size, mac_secret);

#ifdef TLS_DEBUG
	printf("which = %04X\nkey=", which);
	{ int z; for (z = 0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c", key[z],((z+1)%16)?' ':'\n'); }
	printf("\niv=");
	{ int z; for (z = 0; z<k; z++) printf("%02X%c", iv[z],((z+1)%16)?' ':'\n'); }
	printf("\n");
#endif

	OPENSSL_cleanse(tmp1, sizeof(tmp1));
	OPENSSL_cleanse(tmp2, sizeof(tmp1));
	OPENSSL_cleanse(iv1, sizeof(iv1));
	OPENSSL_cleanse(iv2, sizeof(iv2));
	return (1);

err:
	SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
err2:
	return (0);
}

int
tls1_setup_key_block(SSL *s)
{
	unsigned char *p1, *p2 = NULL;
	const EVP_CIPHER *c;
	const EVP_MD *hash;
	int num;
	SSL_COMP *comp;
	int mac_type = NID_undef, mac_secret_size = 0;
	int ret = 0;

#ifdef KSSL_DEBUG
	printf ("tls1_setup_key_block()\n");
#endif	/* KSSL_DEBUG */

	if (s->s3->tmp.key_block_length != 0)
		return (1);

	if (!ssl_cipher_get_evp(s->session, &c, &hash, &mac_type, &mac_secret_size, &comp)) {
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
		return (0);
	}

	s->s3->tmp.new_sym_enc = c;
	s->s3->tmp.new_hash = hash;
	s->s3->tmp.new_mac_pkey_type = mac_type;
	s->s3->tmp.new_mac_secret_size = mac_secret_size;
	num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
	num *= 2;

	ssl3_cleanup_key_block(s);

	if ((p1 = malloc(num)) == NULL) {
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
		goto err;
	}

	s->s3->tmp.key_block_length = num;
	s->s3->tmp.key_block = p1;

	if ((p2 = malloc(num)) == NULL) {
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
		goto err;
	}

#ifdef TLS_DEBUG
	printf("client random\n");
	{ int z; for (z = 0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c", s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
	printf("server random\n");
	{ int z; for (z = 0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c", s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
	printf("pre-master\n");
	{ int z; for (z = 0; z<s->session->master_key_length; z++) printf("%02X%c", s->session->master_key[z],((z+1)%16)?' ':'\n'); }
#endif
	if (!tls1_generate_key_block(s, p1, p2, num))
		goto err;
#ifdef TLS_DEBUG
	printf("\nkey block\n");
	{ int z; for (z = 0; z<num; z++) printf("%02X%c", p1[z],((z+1)%16)?' ':'\n'); }
#endif

	if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) &&
	    s->method->version <= TLS1_VERSION) {
		/* enable vulnerability countermeasure for CBC ciphers with
		 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
		 */
		s->s3->need_empty_fragments = 1;

		if (s->session->cipher != NULL) {
			if (s->session->cipher->algorithm_enc == SSL_eNULL)
				s->s3->need_empty_fragments = 0;

#ifndef OPENSSL_NO_RC4
			if (s->session->cipher->algorithm_enc == SSL_RC4)
				s->s3->need_empty_fragments = 0;
#endif
		}
	}

	ret = 1;
err:
	if (p2) {
		OPENSSL_cleanse(p2, num);
		free(p2);
	}
	return (ret);
}

/* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
 *
 * Returns:
 *   0: (in non-constant time) if the record is publically invalid (i.e. too
 *       short etc).
 *   1: if the record's padding is valid / the encryption was successful.
 *   -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
 *       an internal error occured.
 */
int
tls1_enc(SSL *s, int send)
{
	SSL3_RECORD *rec;
	EVP_CIPHER_CTX *ds;
	unsigned long l;
	int bs, i, j, k, pad = 0, ret, mac_size = 0;
	const EVP_CIPHER *enc;

	if (send) {
		if (EVP_MD_CTX_md(s->write_hash)) {
			int n = EVP_MD_CTX_size(s->write_hash);
			OPENSSL_assert(n >= 0);
		}
		ds = s->enc_write_ctx;
		rec = &(s->s3->wrec);
		if (s->enc_write_ctx == NULL)
			enc = NULL;
		else {
			int ivlen;
			enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
			/* For TLSv1.1 and later explicit IV */
			if (s->version >= TLS1_1_VERSION &&
			    EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
				ivlen = EVP_CIPHER_iv_length(enc);
			else
				ivlen = 0;
			if (ivlen > 1) {
				if (rec->data != rec->input)
					/* we can't write into the input stream:
					 * Can this ever happen?? (steve)
					 */
					fprintf(stderr,
					    "%s:%d: rec->data != rec->input\n",
					    __FILE__, __LINE__);
				else if (RAND_bytes(rec->input, ivlen) <= 0)
					return -1;
			}
		}
	} else {
		if (EVP_MD_CTX_md(s->read_hash)) {
			int n = EVP_MD_CTX_size(s->read_hash);
			OPENSSL_assert(n >= 0);
		}
		ds = s->enc_read_ctx;
		rec = &(s->s3->rrec);
		if (s->enc_read_ctx == NULL)
			enc = NULL;
		else
			enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
	}

#ifdef KSSL_DEBUG
	printf("tls1_enc(%d)\n", send);
#endif    /* KSSL_DEBUG */

	if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
		memmove(rec->data, rec->input, rec->length);
		rec->input = rec->data;
		ret = 1;
	} else {
		l = rec->length;
		bs = EVP_CIPHER_block_size(ds->cipher);

		if (EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
			unsigned char buf[13], *seq;

			seq = send ? s->s3->write_sequence : s->s3->read_sequence;

			if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) {
				unsigned char dtlsseq[9], *p = dtlsseq;

				s2n(send ? s->d1->w_epoch : s->d1->r_epoch, p);
				memcpy(p, &seq[2], 6);
				memcpy(buf, dtlsseq, 8);
			} else {
				memcpy(buf, seq, 8);
				for (i = 7; i >= 0; i--) {	/* increment */
					++seq[i];
					if (seq[i] != 0)
						break;
				}
			}

			buf[8] = rec->type;
			buf[9] = (unsigned char)(s->version >> 8);
			buf[10] = (unsigned char)(s->version);
			buf[11] = rec->length >> 8;
			buf[12] = rec->length & 0xff;
			pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD, 13, buf);
			if (send) {
				l += pad;
				rec->length += pad;
			}
		} else if ((bs != 1) && send) {
			i = bs - ((int)l % bs);

			/* Add weird padding of upto 256 bytes */

			/* we need to add 'i' padding bytes of value j */
			j = i - 1;
			if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) {
				if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
					j++;
			}
			for (k = (int)l; k < (int)(l + i); k++)
				rec->input[k] = j;
			l += i;
			rec->length += i;
		}

#ifdef KSSL_DEBUG
		{
			unsigned long ui;
			printf("EVP_Cipher(ds=%p, rec->data=%p, rec->input=%p, l=%ld) ==>\n",
			    ds, rec->data, rec->input, l);
			printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
			    ds->buf_len, ds->cipher->key_len,
			    DES_KEY_SZ, DES_SCHEDULE_SZ,
			    ds->cipher->iv_len);
			printf("\t\tIV: ");
			for (i = 0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
				printf("\n");
			printf("\trec->input=");
			for (ui = 0; ui<l; ui++) printf(" %02x", rec->input[ui]);
				printf("\n");
		}
#endif	/* KSSL_DEBUG */

		if (!send) {
			if (l == 0 || l % bs != 0)
				return 0;
		}

		i = EVP_Cipher(ds, rec->data, rec->input, l);
		if ((EVP_CIPHER_flags(ds->cipher) &
		    EVP_CIPH_FLAG_CUSTOM_CIPHER) ? (i < 0) : (i == 0))
			return -1;	/* AEAD can fail to verify MAC */
		if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) {
			rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
			rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
			rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
		}

#ifdef KSSL_DEBUG
		{
			unsigned long i;
			printf("\trec->data=");
			for (i = 0; i < l; i++)
				printf(" %02x", rec->data[i]);  printf("\n");
		}
#endif	/* KSSL_DEBUG */

		ret = 1;
		if (EVP_MD_CTX_md(s->read_hash) != NULL)
			mac_size = EVP_MD_CTX_size(s->read_hash);
		if ((bs != 1) && !send)
			ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
		if (pad && !send)
			rec->length -= pad;
	}
	return ret;
}

int
tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
{
	unsigned int ret;
	EVP_MD_CTX ctx, *d = NULL;
	int i;

	if (s->s3->handshake_buffer)
		if (!ssl3_digest_cached_records(s))
			return 0;

	for (i = 0; i < SSL_MAX_DIGEST; i++) {
		if (s->s3->handshake_dgst[i] &&
		    EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) {
			d = s->s3->handshake_dgst[i];
			break;
		}
	}
	if (!d) {
		SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC, SSL_R_NO_REQUIRED_DIGEST);
		return 0;
	}

	EVP_MD_CTX_init(&ctx);
	EVP_MD_CTX_copy_ex(&ctx, d);
	EVP_DigestFinal_ex(&ctx, out, &ret);
	EVP_MD_CTX_cleanup(&ctx);
	return ((int)ret);
}

int
tls1_final_finish_mac(SSL *s, const char *str, int slen, unsigned char *out)
{
	unsigned int i;
	EVP_MD_CTX ctx;
	unsigned char buf[2*EVP_MAX_MD_SIZE];
	unsigned char *q, buf2[12];
	int idx;
	long mask;
	int err = 0;
	const EVP_MD *md;


	q = buf;

	if (s->s3->handshake_buffer)
		if (!ssl3_digest_cached_records(s))
			return 0;

	EVP_MD_CTX_init(&ctx);

	for (idx = 0; ssl_get_handshake_digest(idx, &mask, &md); idx++) {
		if (mask & ssl_get_algorithm2(s)) {
			int hashsize = EVP_MD_size(md);
			EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
			if (!hdgst || hashsize < 0 ||
			    hashsize > (int)(sizeof buf - (size_t)(q - buf))) {
				/* internal error: 'buf' is too small for this cipersuite! */
				err = 1;
			} else {
				if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
				    !EVP_DigestFinal_ex(&ctx, q, &i) ||
				    (i != (unsigned int)hashsize))
					err = 1;
				q += hashsize;
			}
		}
	}

	if (!tls1_PRF(ssl_get_algorithm2(s), str, slen, buf, (int)(q - buf),
	    NULL, 0, NULL, 0, NULL, 0,
	    s->session->master_key, s->session->master_key_length,
	    out, buf2, sizeof buf2))
		err = 1;
	EVP_MD_CTX_cleanup(&ctx);

	if (err)
		return 0;
	else
		return sizeof buf2;
}

int
tls1_mac(SSL *ssl, unsigned char *md, int send)
{
	SSL3_RECORD *rec;
	unsigned char *seq;
	EVP_MD_CTX *hash;
	size_t md_size, orig_len;
	int i;
	EVP_MD_CTX hmac, *mac_ctx;
	unsigned char header[13];
	int stream_mac = (send ?
	    (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM) :
	    (ssl->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM));
	int t;

	if (send) {
		rec = &(ssl->s3->wrec);
		seq = &(ssl->s3->write_sequence[0]);
		hash = ssl->write_hash;
	} else {
		rec = &(ssl->s3->rrec);
		seq = &(ssl->s3->read_sequence[0]);
		hash = ssl->read_hash;
	}

	t = EVP_MD_CTX_size(hash);
	OPENSSL_assert(t >= 0);
	md_size = t;

	/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
	if (stream_mac) {
		mac_ctx = hash;
	} else {
		if (!EVP_MD_CTX_copy(&hmac, hash))
			return -1;
		mac_ctx = &hmac;
	}

	if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) {
		unsigned char dtlsseq[8], *p = dtlsseq;

		s2n(send ? ssl->d1->w_epoch : ssl->d1->r_epoch, p);
		memcpy(p, &seq[2], 6);

		memcpy(header, dtlsseq, 8);
	} else
		memcpy(header, seq, 8);

	/* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
	orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8);
	rec->type &= 0xff;

	header[8] = rec->type;
	header[9] = (unsigned char)(ssl->version >> 8);
	header[10] = (unsigned char)(ssl->version);
	header[11] = (rec->length) >> 8;
	header[12] = (rec->length) & 0xff;

	if (!send &&
	    EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
	    ssl3_cbc_record_digest_supported(mac_ctx)) {
		/* This is a CBC-encrypted record. We must avoid leaking any
		 * timing-side channel information about how many blocks of
		 * data we are hashing because that gives an attacker a
		 * timing-oracle. */
		ssl3_cbc_digest_record(mac_ctx,
		    md, &md_size, header, rec->input,
		    rec->length + md_size, orig_len,
		    ssl->s3->read_mac_secret,
		    ssl->s3->read_mac_secret_size,
		    0 /* not SSLv3 */);
	} else {
		EVP_DigestSignUpdate(mac_ctx, header, sizeof(header));
		EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length);
		t = EVP_DigestSignFinal(mac_ctx, md, &md_size);
		OPENSSL_assert(t > 0);
	}

	if (!stream_mac)
		EVP_MD_CTX_cleanup(&hmac);
#ifdef TLS_DEBUG
	printf("sec=");
	{unsigned int z; for (z = 0; z<md_size; z++) printf("%02X ", mac_sec[z]); printf("\n"); }
	printf("seq=");
	{int z; for (z = 0; z<8; z++) printf("%02X ", seq[z]); printf("\n"); }
	printf("buf=");
	{int z; for (z = 0; z<5; z++) printf("%02X ", buf[z]); printf("\n"); }
	printf("rec=");
	{unsigned int z; for (z = 0; z<rec->length; z++) printf("%02X ", buf[z]); printf("\n"); }
#endif

	if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) {
		for (i = 7; i >= 0; i--) {
			++seq[i];
			if (seq[i] != 0)
				break;
		}
	}

#ifdef TLS_DEBUG
	{unsigned int z; for (z = 0; z<md_size; z++) printf("%02X ", md[z]); printf("\n"); }
#endif
	return (md_size);
}

int
tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
    int len)
{
	unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
	const void *co = NULL, *so = NULL;
	int col = 0, sol = 0;


#ifdef KSSL_DEBUG
	printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s, out, p, len);
#endif	/* KSSL_DEBUG */

#ifdef TLSEXT_TYPE_opaque_prf_input
	if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
	    s->s3->client_opaque_prf_input_len > 0 &&
	    s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) {
		co = s->s3->client_opaque_prf_input;
		col = s->s3->server_opaque_prf_input_len;
		so = s->s3->server_opaque_prf_input;
		sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
	}
#endif

	tls1_PRF(ssl_get_algorithm2(s),
	    TLS_MD_MASTER_SECRET_CONST, TLS_MD_MASTER_SECRET_CONST_SIZE,
	    s->s3->client_random, SSL3_RANDOM_SIZE,
	    co, col,
	    s->s3->server_random, SSL3_RANDOM_SIZE,
	    so, sol,
	    p, len,
	    s->session->master_key, buff, sizeof buff);
#ifdef SSL_DEBUG
	fprintf(stderr, "Premaster Secret:\n");
	BIO_dump_fp(stderr, (char *)p, len);
	fprintf(stderr, "Client Random:\n");
	BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
	fprintf(stderr, "Server Random:\n");
	BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
	fprintf(stderr, "Master Secret:\n");
	BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
#endif

#ifdef KSSL_DEBUG
	printf ("tls1_generate_master_secret() complete\n");
#endif	/* KSSL_DEBUG */
	return (SSL3_MASTER_SECRET_SIZE);
}

int
tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
    const char *label, size_t llen, const unsigned char *context,
    size_t contextlen, int use_context)
{
	unsigned char *buff;
	unsigned char *val = NULL;
	size_t vallen, currentvalpos;
	int rv;

#ifdef KSSL_DEBUG
	printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
#endif	/* KSSL_DEBUG */

	buff = malloc(olen);
	if (buff == NULL)
		goto err2;

	/* construct PRF arguments
	 * we construct the PRF argument ourself rather than passing separate
	 * values into the TLS PRF to ensure that the concatenation of values
	 * does not create a prohibited label.
	 */
	vallen = llen + SSL3_RANDOM_SIZE * 2;
	if (use_context) {
		vallen += 2 + contextlen;
	}

	val = malloc(vallen);
	if (val == NULL)
		goto err2;
	currentvalpos = 0;
	memcpy(val + currentvalpos, (unsigned char *) label, llen);
	currentvalpos += llen;
	memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
	currentvalpos += SSL3_RANDOM_SIZE;
	memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
	currentvalpos += SSL3_RANDOM_SIZE;

	if (use_context) {
		val[currentvalpos] = (contextlen >> 8) & 0xff;
		currentvalpos++;
		val[currentvalpos] = contextlen & 0xff;
		currentvalpos++;
		if ((contextlen > 0) || (context != NULL)) {
			memcpy(val + currentvalpos, context, contextlen);
		}
	}

	/* disallow prohibited labels
	 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
	 * 15, so size of val > max(prohibited label len) = 15 and the
	 * comparisons won't have buffer overflow
	 */
	if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
	    TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
		goto err1;
	if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
	    TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
		goto err1;
	if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
	    TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
		goto err1;
	if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
	    TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
		goto err1;

	rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
	    val, vallen, NULL, 0, NULL, 0, NULL, 0, NULL, 0,
	    s->session->master_key, s->session->master_key_length,
	    out, buff, olen);

#ifdef KSSL_DEBUG
	printf ("tls1_export_keying_material() complete\n");
#endif	/* KSSL_DEBUG */
	goto ret;
err1:
	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
	rv = 0;
	goto ret;
err2:
	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
	rv = 0;
ret:
	if (buff != NULL)
		free(buff);
	if (val != NULL)
		free(val);
	return (rv);
}

int
tls1_alert_code(int code)
{
	switch (code) {
	case SSL_AD_CLOSE_NOTIFY:
		return (SSL3_AD_CLOSE_NOTIFY);
	case SSL_AD_UNEXPECTED_MESSAGE:
		return (SSL3_AD_UNEXPECTED_MESSAGE);
	case SSL_AD_BAD_RECORD_MAC:
		return (SSL3_AD_BAD_RECORD_MAC);
	case SSL_AD_DECRYPTION_FAILED:
		return (TLS1_AD_DECRYPTION_FAILED);
	case SSL_AD_RECORD_OVERFLOW:
		return (TLS1_AD_RECORD_OVERFLOW);
	case SSL_AD_DECOMPRESSION_FAILURE:
		return (SSL3_AD_DECOMPRESSION_FAILURE);
	case SSL_AD_HANDSHAKE_FAILURE:
		return (SSL3_AD_HANDSHAKE_FAILURE);
	case SSL_AD_NO_CERTIFICATE:
		return (-1);
	case SSL_AD_BAD_CERTIFICATE:
		return (SSL3_AD_BAD_CERTIFICATE);
	case SSL_AD_UNSUPPORTED_CERTIFICATE:
		return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
	case SSL_AD_CERTIFICATE_REVOKED:
		return (SSL3_AD_CERTIFICATE_REVOKED);
	case SSL_AD_CERTIFICATE_EXPIRED:
		return (SSL3_AD_CERTIFICATE_EXPIRED);
	case SSL_AD_CERTIFICATE_UNKNOWN:
		return (SSL3_AD_CERTIFICATE_UNKNOWN);
	case SSL_AD_ILLEGAL_PARAMETER:
		return (SSL3_AD_ILLEGAL_PARAMETER);
	case SSL_AD_UNKNOWN_CA:
		return (TLS1_AD_UNKNOWN_CA);
	case SSL_AD_ACCESS_DENIED:
		return (TLS1_AD_ACCESS_DENIED);
	case SSL_AD_DECODE_ERROR:
		return (TLS1_AD_DECODE_ERROR);
	case SSL_AD_DECRYPT_ERROR:
		return (TLS1_AD_DECRYPT_ERROR);
	case SSL_AD_EXPORT_RESTRICTION:
		return (TLS1_AD_EXPORT_RESTRICTION);
	case SSL_AD_PROTOCOL_VERSION:
		return (TLS1_AD_PROTOCOL_VERSION);
	case SSL_AD_INSUFFICIENT_SECURITY:
		return (TLS1_AD_INSUFFICIENT_SECURITY);
	case SSL_AD_INTERNAL_ERROR:
		return (TLS1_AD_INTERNAL_ERROR);
	case SSL_AD_USER_CANCELLED:
		return (TLS1_AD_USER_CANCELLED);
	case SSL_AD_NO_RENEGOTIATION:
		return (TLS1_AD_NO_RENEGOTIATION);
	case SSL_AD_UNSUPPORTED_EXTENSION:
		return (TLS1_AD_UNSUPPORTED_EXTENSION);
	case SSL_AD_CERTIFICATE_UNOBTAINABLE:
		return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
	case SSL_AD_UNRECOGNIZED_NAME:
		return (TLS1_AD_UNRECOGNIZED_NAME);
	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
		return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
		return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
	case SSL_AD_UNKNOWN_PSK_IDENTITY:
		return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
#if 0 /* not appropriate for TLS, not used for DTLS */
	case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE : return
		(DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
#endif
	default:
		return (-1);
	}
}