Up min size of DHM params to 1024 bits

This commit is contained in:
Manuel Pégourié-Gonnard 2015-06-26 18:20:34 +02:00
parent 7b209579c6
commit 5324d411da
5 changed files with 15 additions and 2 deletions

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@ -1,5 +1,15 @@
PolarSSL ChangeLog
= Version 1.2.15 released 2015-mm-dd
Security
* Increase the minimum size of Diffie-Hellman parameters accepted by the
lient to 1024 bits, to protect against Logjam attack.
Changes
* Add SSL_MIN_DHM_BYTES configuration parameter in config.h to choose the
minimum size of Diffie-Hellman parameters accepted by the client.
= Version 1.2.14 released 2015-06-26
Security

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@ -1017,6 +1017,7 @@
// SSL options
//
#define SSL_MAX_CONTENT_LEN 16384 /**< Size of the input / output buffer */
#define SSL_MIN_DHM_BYTES 128 /**< Min size of the Diffie-Hellman prime */
// X509 options
//

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@ -130,6 +130,7 @@
*/
#if !defined(POLARSSL_CONFIG_OPTIONS)
#define SSL_MAX_CONTENT_LEN 16384 /**< Size of the input / output buffer */
#define SSL_MIN_DHM_BYTES 128 /**< Min size of the Diffie-Hellman prime */
#endif /* !POLARSSL_CONFIG_OPTIONS */
/*

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@ -778,7 +778,8 @@ static int ssl_parse_server_key_exchange( ssl_context *ssl )
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
if( ssl->handshake->dhm_ctx.len < 64 || ssl->handshake->dhm_ctx.len > 512 )
if( ssl->handshake->dhm_ctx.len < SSL_MIN_DHM_BYTES ||
ssl->handshake->dhm_ctx.len > 512 )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );

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@ -12,7 +12,7 @@ if [ "X$VERIFY" = "XYES" ];
then
P_SERVER_ARGS="auth_mode=required crt_file=data_files/server1.crt key_file=data_files/server1.key ca_file=data_files/test-ca.crt"
P_CLIENT_ARGS="crt_file=data_files/server2.crt key_file=data_files/server2.key ca_file=data_files/test-ca.crt"
O_SERVER_ARGS="-verify 10 -CAfile data_files/test-ca.crt -cert data_files/server1.crt -key data_files/server1.key"
O_SERVER_ARGS="-verify 10 -CAfile data_files/test-ca.crt -cert data_files/server1.crt -key data_files/server1.key -dhparam data_files/dhparams.pem"
O_CLIENT_ARGS="-cert data_files/server2.crt -key data_files/server2.key -CAfile data_files/test-ca.crt"
fi