nss/disableSSL2libssl.patch

--- ./lib/ssl/config.mk.disableSSL2libssl	2016-03-05 09:20:12.712130884 -0800
+++ ./lib/ssl/config.mk	2016-03-05 09:24:22.748518581 -0800
@@ -2,16 +2,20 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 ifdef NISCC_TEST
 DEFINES += -DNISCC_TEST
 endif
 
+ifdef NSS_NO_SSL2_NO_EXPORT
+DEFINES += -DNSS_NO_SSL2_NO_EXPORT
+endif
+
 ifdef NSS_NO_PKCS11_BYPASS
 DEFINES += -DNO_PKCS11_BYPASS
 else
 CRYPTOLIB=$(SOFTOKEN_LIB_DIR)/$(LIB_PREFIX)freebl.$(LIB_SUFFIX)
 
 EXTRA_LIBS += \
 	$(CRYPTOLIB) \
 	$(NULL)
--- ./lib/ssl/sslsock.c.disableSSL2libssl	2016-03-05 09:20:12.713130866 -0800
+++ ./lib/ssl/sslsock.c	2016-03-05 09:32:55.060592007 -0800
@@ -707,16 +707,22 @@
             if (ss->cipherSpecs) {
                 PORT_Free(ss->cipherSpecs);
                 ss->cipherSpecs = NULL;
                 ss->sizeCipherSpecs = 0;
             }
             break;
 
         case SSL_ENABLE_SSL2:
+#ifdef NSS_NO_SSL2_NO_EXPORT
+            if (on) {
+                PORT_SetError(SSL_ERROR_SSL2_DISABLED);
+                rv = SECFailure; /* not allowed */
+            }
+#else
             if (IS_DTLS(ss)) {
                 if (on) {
                     PORT_SetError(SEC_ERROR_INVALID_ARGS);
                     rv = SECFailure; /* not allowed */
                 }
                 break;
             }
             if (on) {
@@ -731,52 +737,67 @@
                 ss->opt.v2CompatibleHello = on;
             }
             ss->preferredCipher = NULL;
             if (ss->cipherSpecs) {
                 PORT_Free(ss->cipherSpecs);
                 ss->cipherSpecs = NULL;
                 ss->sizeCipherSpecs = 0;
             }
+#endif /* NSS_NO_SSL2_NO_EXPORT */
             break;
 
         case SSL_NO_CACHE:
             ss->opt.noCache = on;
             break;
 
         case SSL_ENABLE_FDX:
             if (on && ss->opt.noLocks) {
                 PORT_SetError(SEC_ERROR_INVALID_ARGS);
                 rv = SECFailure;
             }
             ss->opt.fdx = on;
             break;
 
         case SSL_V2_COMPATIBLE_HELLO:
+#ifdef NSS_NO_SSL2_NO_EXPORT
+            if (on) {
+                PORT_SetError(SSL_ERROR_SSL2_DISABLED);
+                rv = SECFailure; /* not allowed */
+            }
+#else
             if (IS_DTLS(ss)) {
                 if (on) {
                     PORT_SetError(SEC_ERROR_INVALID_ARGS);
                     rv = SECFailure; /* not allowed */
                 }
                 break;
             }
             ss->opt.v2CompatibleHello = on;
             if (!on) {
                 ss->opt.enableSSL2 = on;
             }
+#endif /* NSS_NO_SSL2_NO_EXPORT */
             break;
 
         case SSL_ROLLBACK_DETECTION:
             ss->opt.detectRollBack = on;
             break;
 
         case SSL_NO_STEP_DOWN:
+#ifdef NSS_NO_SSL2_NO_EXPORT
+            if (!on) {
+                PORT_SetError(SSL_ERROR_SSL2_DISABLED);
+                rv = SECFailure; /* not allowed */
+            }
+#else
             ss->opt.noStepDown = on;
             if (on)
                 SSL_DisableExportCipherSuites(fd);
+#endif /* NSS_NO_SSL2_NO_EXPORT */
             break;
 
         case SSL_BYPASS_PKCS11:
             if (ss->handshakeBegun) {
                 PORT_SetError(PR_INVALID_STATE_ERROR);
                 rv = SECFailure;
             } else {
                 if (PR_FALSE != on) {
@@ -1324,16 +1345,32 @@
     }
     return SECSuccess;
 }
 
 /* function tells us if the cipher suite is one that we no longer support. */
 static PRBool
 ssl_IsRemovedCipherSuite(PRInt32 suite)
 {
+#ifdef NSS_NO_SSL2_NO_EXPORT
+    /* both ssl2 and export cipher suites disabled */
+    if (SSL_IS_SSL2_CIPHER(suite))
+        return PR_TRUE;
+    if (SSL_IsExportCipherSuite(suite)) {
+        SSLCipherSuiteInfo csdef;
+        if (SSL_GetCipherSuiteInfo(suite, &csdef, sizeof(csdef)) != SECSuccess) {
+            /* failure to retrieve info, disable */
+            return PR_TRUE;
+        }
+        if (csdef.symCipher != ssl_calg_null) {
+            /* disable all except NULL ciphersuites */
+            return PR_TRUE;
+        }
+    }
+#endif /* NSS_NO_SSL2_NO_EXPORT */
     switch (suite) {
         case SSL_FORTEZZA_DMS_WITH_NULL_SHA:
         case SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA:
         case SSL_FORTEZZA_DMS_WITH_RC4_128_SHA:
             return PR_TRUE;
         default:
             return PR_FALSE;
     }