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=OPENSSL_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=(unsigned char *)
					OPENSSL_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)
			reuse_dd = 1;
		else if ((s->enc_write_ctx=OPENSSL_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_write_ctx);
		dd= s->enc_write_ctx;
		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); */
	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);
	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(s->s3->tmp.new_cipher->algorithm2,
				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(s->s3->tmp.new_cipher->algorithm2,
					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]);
			}
		}

	s->session->key_arg_length=0;
#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 */

	EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
#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_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	 

	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=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
			goto err;
		else
			 
			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=(unsigned char *)
					OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
			if (s->s3->rrec.comp == NULL)
				goto err;
			}
#endif
		 
 		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)
			reuse_dd = 1;
		else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
			goto err;
		else
			 
			EVP_CIPHER_CTX_init(s->enc_write_ctx);
		dd= s->enc_write_ctx;
		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
		 
 		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;
	 
	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);
	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)
		{
		 
		if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
				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(s->s3->tmp.new_cipher->algorithm2,
					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]);
			}
		}

	s->session->key_arg_length=0;
#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	 

	EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
#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);
	}