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ITS#7595 Add Elliptic Curve support for OpenSSL
Cherry-picked upstream e631ce808ed56119e61321463d06db7999ba5a08
Author: Howard Chu <hyc@openldap.org>
Date: Sat Sep 7 09:47:19 2013 -0700
diff --git a/doc/man/man5/slapd-config.5 b/doc/man/man5/slapd-config.5
index 9c72e8296..2311c3096 100644
--- a/doc/man/man5/slapd-config.5
+++ b/doc/man/man5/slapd-config.5
@@ -922,6 +922,13 @@ are not used.
When using Mozilla NSS these parameters are always generated randomly
so this directive is ignored.
.TP
+.B olcTLSECName: <name>
+Specify the name of a curve to use for Elliptic curve Diffie-Hellman
+ephemeral key exchange. This is required to enable ECDHE algorithms in
+OpenSSL. This option is not used with GnuTLS; the curves may be
+chosen in the GnuTLS ciphersuite specification. This option is also
+ignored for Mozilla NSS.
+.TP
.B olcTLSProtocolMin: <major>[.<minor>]
Specifies minimum SSL/TLS protocol version that will be negotiated.
If the server doesn't support at least that version,
diff --git a/doc/man/man5/slapd.conf.5 b/doc/man/man5/slapd.conf.5
index f504adcf9..ef03e0ad8 100644
--- a/doc/man/man5/slapd.conf.5
+++ b/doc/man/man5/slapd.conf.5
@@ -1153,6 +1153,13 @@ are not used.
When using Mozilla NSS these parameters are always generated randomly
so this directive is ignored.
.TP
+.B TLSECName <name>
+Specify the name of a curve to use for Elliptic curve Diffie-Hellman
+ephemeral key exchange. This is required to enable ECDHE algorithms in
+OpenSSL. This option is not used with GnuTLS; the curves may be
+chosen in the GnuTLS ciphersuite specification. This option is also
+ignored for Mozilla NSS.
+.TP
.B TLSProtocolMin <major>[.<minor>]
Specifies minimum SSL/TLS protocol version that will be negotiated.
If the server doesn't support at least that version,
diff --git a/include/ldap.h b/include/ldap.h
index c245651c2..0964a193e 100644
--- a/include/ldap.h
+++ b/include/ldap.h
@@ -158,6 +158,7 @@ LDAP_BEGIN_DECL
#define LDAP_OPT_X_TLS_NEWCTX 0x600f
#define LDAP_OPT_X_TLS_CRLFILE 0x6010 /* GNUtls only */
#define LDAP_OPT_X_TLS_PACKAGE 0x6011
+#define LDAP_OPT_X_TLS_ECNAME 0x6012
#define LDAP_OPT_X_TLS_NEVER 0
#define LDAP_OPT_X_TLS_HARD 1
diff --git a/libraries/libldap/ldap-int.h b/libraries/libldap/ldap-int.h
index 66e04ae80..db7193f4f 100644
--- a/libraries/libldap/ldap-int.h
+++ b/libraries/libldap/ldap-int.h
@@ -165,6 +165,7 @@ struct ldaptls {
char *lt_ciphersuite;
char *lt_crlfile;
char *lt_randfile; /* OpenSSL only */
+ char *lt_ecname; /* OpenSSL only */
int lt_protocol_min;
};
#endif
@@ -250,6 +251,7 @@ struct ldapoptions {
#define ldo_tls_certfile ldo_tls_info.lt_certfile
#define ldo_tls_keyfile ldo_tls_info.lt_keyfile
#define ldo_tls_dhfile ldo_tls_info.lt_dhfile
+#define ldo_tls_ecname ldo_tls_info.lt_ecname
#define ldo_tls_cacertfile ldo_tls_info.lt_cacertfile
#define ldo_tls_cacertdir ldo_tls_info.lt_cacertdir
#define ldo_tls_ciphersuite ldo_tls_info.lt_ciphersuite
diff --git a/libraries/libldap/tls2.c b/libraries/libldap/tls2.c
index d25c190ea..0451b01af 100644
--- a/libraries/libldap/tls2.c
+++ b/libraries/libldap/tls2.c
@@ -118,6 +118,10 @@ ldap_int_tls_destroy( struct ldapoptions *lo )
LDAP_FREE( lo->ldo_tls_dhfile );
lo->ldo_tls_dhfile = NULL;
}
+ if ( lo->ldo_tls_ecname ) {
+ LDAP_FREE( lo->ldo_tls_ecname );
+ lo->ldo_tls_ecname = NULL;
+ }
if ( lo->ldo_tls_cacertfile ) {
LDAP_FREE( lo->ldo_tls_cacertfile );
lo->ldo_tls_cacertfile = NULL;
@@ -232,6 +236,10 @@ ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
lts.lt_dhfile = LDAP_STRDUP( lts.lt_dhfile );
__atoe( lts.lt_dhfile );
}
+ if ( lts.lt_ecname ) {
+ lts.lt_ecname = LDAP_STRDUP( lts.lt_ecname );
+ __atoe( lts.lt_ecname );
+ }
#endif
lo->ldo_tls_ctx = ti->ti_ctx_new( lo );
if ( lo->ldo_tls_ctx == NULL ) {
@@ -257,6 +265,7 @@ error_exit:
LDAP_FREE( lts.lt_crlfile );
LDAP_FREE( lts.lt_cacertdir );
LDAP_FREE( lts.lt_dhfile );
+ LDAP_FREE( lts.lt_ecname );
#endif
return rc;
}
@@ -646,6 +655,10 @@ ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
*(char **)arg = lo->ldo_tls_dhfile ?
LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
break;
+ case LDAP_OPT_X_TLS_ECNAME:
+ *(char **)arg = lo->ldo_tls_ecname ?
+ LDAP_STRDUP( lo->ldo_tls_ecname ) : NULL;
+ break;
case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
*(char **)arg = lo->ldo_tls_crlfile ?
LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL;
@@ -765,6 +778,10 @@ ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
lo->ldo_tls_dhfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
+ case LDAP_OPT_X_TLS_ECNAME:
+ if ( lo->ldo_tls_ecname ) LDAP_FREE( lo->ldo_tls_ecname );
+ lo->ldo_tls_ecname = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile );
lo->ldo_tls_crlfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
diff --git a/libraries/libldap/tls_o.c b/libraries/libldap/tls_o.c
index f24060b7e..1370923af 100644
--- a/libraries/libldap/tls_o.c
+++ b/libraries/libldap/tls_o.c
@@ -373,10 +373,9 @@ tlso_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
return -1;
}
- if ( lo->ldo_tls_dhfile ) {
- DH *dh = NULL;
+ if ( is_server && lo->ldo_tls_dhfile ) {
+ DH *dh;
BIO *bio;
- SSL_CTX_set_options( ctx, SSL_OP_SINGLE_DH_USE );
if (( bio=BIO_new_file( lt->lt_dhfile,"r" )) == NULL ) {
Debug( LDAP_DEBUG_ANY,
@@ -395,7 +394,35 @@ tlso_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
}
BIO_free( bio );
SSL_CTX_set_tmp_dh( ctx, dh );
+ SSL_CTX_set_options( ctx, SSL_OP_SINGLE_DH_USE );
+ DH_free( dh );
+ }
+
+#ifdef SSL_OP_SINGLE_ECDH_USE
+ if ( is_server && lo->ldo_tls_ecname ) {
+ EC_KEY *ecdh;
+
+ int nid = OBJ_sn2nid( lt->lt_ecname );
+ if ( nid == NID_undef ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: could not use EC name `%s'.\n",
+ lo->ldo_tls_ecname,0,0);
+ tlso_report_error();
+ return -1;
+ }
+ ecdh = EC_KEY_new_by_curve_name( nid );
+ if ( ecdh == NULL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: could not generate key for EC name `%s'.\n",
+ lo->ldo_tls_ecname,0,0);
+ tlso_report_error();
+ return -1;
+ }
+ SSL_CTX_set_tmp_ecdh( ctx, ecdh );
+ SSL_CTX_set_options( ctx, SSL_OP_SINGLE_ECDH_USE );
+ EC_KEY_free( ecdh );
}
+#endif
if ( tlso_opt_trace ) {
SSL_CTX_set_info_callback( ctx, tlso_info_cb );
diff --git a/servers/slapd/bconfig.c b/servers/slapd/bconfig.c
index 250f14100..8b1e4e582 100644
--- a/servers/slapd/bconfig.c
+++ b/servers/slapd/bconfig.c
@@ -194,6 +194,7 @@ enum {
CFG_ACL_ADD,
CFG_SYNC_SUBENTRY,
CFG_LTHREADS,
+ CFG_TLS_ECNAME,
CFG_LAST
};
@@ -738,6 +739,14 @@ static ConfigTable config_back_cf_table[] = {
#endif
"( OLcfgGlAt:77 NAME 'olcTLSDHParamFile' "
"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
+ { "TLSECName", NULL, 2, 2, 0,
+#ifdef HAVE_TLS
+ CFG_TLS_ECNAME|ARG_STRING|ARG_MAGIC, &config_tls_option,
+#else
+ ARG_IGNORED, NULL,
+#endif
+ "( OLcfgGlAt:96 NAME 'olcTLSECName' "
+ "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
{ "TLSProtocolMin", NULL, 2, 2, 0,
#ifdef HAVE_TLS
CFG_TLS_PROTOCOL_MIN|ARG_STRING|ARG_MAGIC, &config_tls_config,
@@ -819,7 +828,7 @@ static ConfigOCs cf_ocs[] = {
"olcThreads $ olcTimeLimit $ olcTLSCACertificateFile $ "
"olcTLSCACertificatePath $ olcTLSCertificateFile $ "
"olcTLSCertificateKeyFile $ olcTLSCipherSuite $ olcTLSCRLCheck $ "
- "olcTLSRandFile $ olcTLSVerifyClient $ olcTLSDHParamFile $ "
+ "olcTLSRandFile $ olcTLSVerifyClient $ olcTLSDHParamFile $ olcTLSECName $ "
"olcTLSCRLFile $ olcTLSProtocolMin $ olcToolThreads $ olcWriteTimeout $ "
"olcObjectIdentifier $ olcAttributeTypes $ olcObjectClasses $ "
"olcDitContentRules $ olcLdapSyntaxes ) )", Cft_Global },
@@ -3824,6 +3833,7 @@ config_tls_option(ConfigArgs *c) {
case CFG_TLS_CA_PATH: flag = LDAP_OPT_X_TLS_CACERTDIR; break;
case CFG_TLS_CA_FILE: flag = LDAP_OPT_X_TLS_CACERTFILE; break;
case CFG_TLS_DH_FILE: flag = LDAP_OPT_X_TLS_DHFILE; break;
+ case CFG_TLS_ECNAME: flag = LDAP_OPT_X_TLS_ECNAME; break;
#ifdef HAVE_GNUTLS
case CFG_TLS_CRL_FILE: flag = LDAP_OPT_X_TLS_CRLFILE; break;
#endif
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