Support safari_ecdhe_ecdsa_bug for openssl_options

3 files changed, 21 insertions, 1 deletions

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 56ce0693b..29214e3e1 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -14742,6 +14742,8 @@ Possible options may include:
 .next
 &`no_tlsv1_2`&
 .next
+&`safari_ecdhe_ecdsa_bug`&
+.next
 &`single_dh_use`&
 .next
 &`single_ecdh_use`&
@@ -14757,6 +14759,15 @@ Possible options may include:
 &`tls_rollback_bug`&
 .endlist
 
+.new
+As an aside, the &`safari_ecdhe_ecdsa_bug`& item is a misnomer and affects
+all clients connecting using the MacOS SecureTransport TLS facility prior
+to MacOS 10.8.4, including email clients.  If you see old MacOS clients failing
+to negotiate TLS then this option value might help, provided that your OpenSSL
+release is new enough to contain this work-around.  This may be a situation
+where you have to upgrade OpenSSL to get buggy clients working.
+.wen
+
 
 .option oracle_servers main "string list" unset
 .cindex "Oracle" "server list"
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index d84e2aa5d..f9a376779 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -205,6 +205,10 @@ PP/21 Fix eximon continuous updating with timestamped log-files.
 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
       Report from Prashanth Katuri.
 
+PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
+      It's SecureTransport, so affects any MacOS clients which use the
+      system-integrated TLS libraries, including email clients.
+
 
 Exim version 4.80.1
 -------------------
diff --git a/src/src/tls-openssl.c b/src/src/tls-openssl.c
index 6f2646f03..b273fff75 100644
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -2061,7 +2061,9 @@ all options unless explicitly for DTLS, let the administrator choose which
 to apply.
 
 This list is current as of:
-  ==>  1.0.1b  <==  */
+  ==>  1.0.1b  <==
+Plus SSL_OP_SAFARI_ECDHE_ECDSA_BUG from 2013-June patch/discussion on openssl-dev
+*/
 static struct exim_openssl_option exim_openssl_options[] = {
 /* KEEP SORTED ALPHABETICALLY! */
 #ifdef SSL_OP_ALL
@@ -2126,6 +2128,9 @@ static struct exim_openssl_option exim_openssl_options[] = {
 #ifdef SSL_OP_NO_TLSv1_2
   { US"no_tlsv1_2", SSL_OP_NO_TLSv1_2 },
 #endif
+#ifdef SSL_OP_SAFARI_ECDHE_ECDSA_BUG
+  { US"safari_ecdhe_ecdsa_bug", SSL_OP_SAFARI_ECDHE_ECDSA_BUG },
+#endif
 #ifdef SSL_OP_SINGLE_DH_USE
   { US"single_dh_use", SSL_OP_SINGLE_DH_USE },
 #endif