Commit 5d58f1bb authored by Andy Polyakov's avatar Andy Polyakov
Browse files

Prohibit RC4 in DTLS.

parent fcd1cb66

ssl/d1_lib.c

+20 −0
Original line number Diff line number Diff line
@@ -167,3 +167,23 @@ void dtls1_clear(SSL *s) 
	ssl3_clear(s);

	s->version=DTLS1_VERSION;

	}



/*

 * As it's impossible to use stream ciphers in "datagram" mode, this

 * simple filter is designed to disengage them in DTLS. Unfortunately

 * there is no universal way to identify stream SSL_CIPHER, so we have

 * to explicitly list their SSL_* codes. Currently RC4 is the only one

 * available, but if new ones emerge, they will have to be added...

 */

SSL_CIPHER *dtls1_get_cipher(unsigned int u)

	{

	SSL_CIPHER *ciph = ssl3_get_cipher(u);



	if (ciph != NULL)

		{

		if (ciph->algorithm_enc == SSL_RC4)

			return NULL;

		}



	return ciph;

	}

ssl/ssl_locl.h

+2 −1
Original line number Diff line number Diff line
@@ -746,7 +746,7 @@ const SSL_METHOD *func_name(void) \ 
		ssl3_put_cipher_by_char, \

		ssl3_pending, \

		ssl3_num_ciphers, \

		ssl3_get_cipher, \

		dtls1_get_cipher, \

		s_get_meth, \

		dtls1_default_timeout, \

		&DTLSv1_enc_data, \
@@ -915,6 +915,7 @@ void dtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr) 
void dtls1_get_ccs_header(unsigned char *data, struct ccs_header_st *ccs_hdr);

void dtls1_reset_seq_numbers(SSL *s, int rw);

long dtls1_default_timeout(void);

SSL_CIPHER *dtls1_get_cipher(unsigned int u);





/* some client-only functions */