Remove SSL_get_server_tmp_key.

It's never used and is partially broken right now; EVP_PKEY_DH doesn't
work.

Change-Id: Id6262cd868153ef731e3f4d679b2ca308cfb12a3
Reviewed-on: https://boringssl-review.googlesource.com/5343
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/ssl.h

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 940d2cf..f01fee4 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1770,7 +1770,6 @@
 #define SSL_CTRL_BUILD_CERT_CHAIN 105
 #define SSL_CTRL_SET_VERIFY_CERT_STORE 106
 #define SSL_CTRL_SET_CHAIN_CERT_STORE 107
-#define SSL_CTRL_GET_SERVER_TMP_KEY 109
 #define SSL_CTRL_GET_EC_POINT_FORMATS 111
 
 #define SSL_CTRL_GET_CHAIN_CERTS 115
@@ -1956,9 +1955,6 @@
 #define SSL_set1_client_certificate_types(s, clist, clistlen) \
   SSL_ctrl(s, SSL_CTRL_SET_CLIENT_CERT_TYPES, clistlen, (char *)clist)
 
-#define SSL_get_server_tmp_key(s, pk) \
-  SSL_ctrl(s, SSL_CTRL_GET_SERVER_TMP_KEY, 0, pk)
-
 #define SSL_get0_ec_point_formats(s, plst) \
   SSL_ctrl(s, SSL_CTRL_GET_EC_POINT_FORMATS, 0, (char *)plst)
 

ssl/s3_lib.c

diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index 71234a9..edf0f81 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -452,34 +452,6 @@
     case SSL_CTRL_SET_CHAIN_CERT_STORE:
       return ssl_cert_set_cert_store(s->cert, parg, 1, larg);
 
-    case SSL_CTRL_GET_SERVER_TMP_KEY:
-      if (s->server || !s->session || !s->session->sess_cert) {
-        return 0;
-      } else {
-        SESS_CERT *sc;
-        EVP_PKEY *ptmp;
-        int rv = 0;
-        sc = s->session->sess_cert;
-        if (!sc->peer_dh_tmp && !sc->peer_ecdh_tmp) {
-          return 0;
-        }
-        ptmp = EVP_PKEY_new();
-        if (!ptmp) {
-          return 0;
-        }
-        if (sc->peer_dh_tmp) {
-          rv = EVP_PKEY_set1_DH(ptmp, sc->peer_dh_tmp);
-        } else if (sc->peer_ecdh_tmp) {
-          rv = EVP_PKEY_set1_EC_KEY(ptmp, sc->peer_ecdh_tmp);
-        }
-        if (rv) {
-          *(EVP_PKEY **)parg = ptmp;
-          return 1;
-        }
-        EVP_PKEY_free(ptmp);
-        return 0;
-      }
-
     case SSL_CTRL_GET_EC_POINT_FORMATS: {
       const uint8_t **pformat = parg;
       if (!s->s3->tmp.peer_ecpointformatlist) {