From 416ad90afc50d9cbcb50ba4ab28f88d260774f6d Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 1 Jul 2016 13:32:31 +0200
Subject: [PATCH] TLS: switch off SSL session id when client cert is used

CVE-2016-5419
Bug: https://curl.haxx.se/docs/adv_20160803A.html
Reported-by: Bru Rom
Contributions-by: Eric Rescorla and Ray Satiro
---
 lib/url.c       |  1 +
 lib/urldata.h   |  1 +
 lib/vtls/vtls.c | 10 ++++++++++
 3 files changed, 12 insertions(+)

diff --git a/lib/url.c b/lib/url.c
index 258a286..e547e5c 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -6121,10 +6121,11 @@ static CURLcode create_conn(struct Curl_easy *data,
   data->set.ssl.CRLfile = data->set.str[STRING_SSL_CRLFILE];
   data->set.ssl.issuercert = data->set.str[STRING_SSL_ISSUERCERT];
   data->set.ssl.random_file = data->set.str[STRING_SSL_RANDOM_FILE];
   data->set.ssl.egdsocket = data->set.str[STRING_SSL_EGDSOCKET];
   data->set.ssl.cipher_list = data->set.str[STRING_SSL_CIPHER_LIST];
+  data->set.ssl.clientcert = data->set.str[STRING_CERT];
 #ifdef USE_TLS_SRP
   data->set.ssl.username = data->set.str[STRING_TLSAUTH_USERNAME];
   data->set.ssl.password = data->set.str[STRING_TLSAUTH_PASSWORD];
 #endif
 
diff --git a/lib/urldata.h b/lib/urldata.h
index 611c5a7..3cf7ed9 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -349,10 +349,11 @@ struct ssl_config_data {
   bool verifystatus;     /* set TRUE if certificate status must be checked */
   char *CApath;          /* certificate dir (doesn't work on windows) */
   char *CAfile;          /* certificate to verify peer against */
   const char *CRLfile;   /* CRL to check certificate revocation */
   const char *issuercert;/* optional issuer certificate filename */
+  char *clientcert;
   char *random_file;     /* path to file containing "random" data */
   char *egdsocket;       /* path to file containing the EGD daemon socket */
   char *cipher_list;     /* list of ciphers to use */
   size_t max_ssl_sessions; /* SSL session id cache size */
   curl_ssl_ctx_callback fsslctx; /* function to initialize ssl ctx */
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index d3e41cd..33e209d 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -154,20 +154,30 @@ Curl_clone_ssl_config(struct ssl_config_data *source,
       return FALSE;
   }
   else
     dest->random_file = NULL;
 
+  if(source->clientcert) {
+    dest->clientcert = strdup(source->clientcert);
+    if(!dest->clientcert)
+      return FALSE;
+    dest->sessionid = FALSE;
+  }
+  else
+    dest->clientcert = NULL;
+
   return TRUE;
 }
 
 void Curl_free_ssl_config(struct ssl_config_data* sslc)
 {
   Curl_safefree(sslc->CAfile);
   Curl_safefree(sslc->CApath);
   Curl_safefree(sslc->cipher_list);
   Curl_safefree(sslc->egdsocket);
   Curl_safefree(sslc->random_file);
+  Curl_safefree(sslc->clientcert);
 }
 
 
 /*
  * Curl_rand() returns a random unsigned integer, 32bit.
-- 
2.8.1