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-rw-r--r--src/global.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/global.c b/src/global.c
index 4a0b680ef..514b96ccb 100644
--- a/src/global.c
+++ b/src/global.c
@@ -71,7 +71,20 @@ static void init_ssl(void)
#ifdef GIT_SSL
SSL_load_error_strings();
OpenSSL_add_ssl_algorithms();
+ /*
+ * Load SSLv{2,3} and TLSv1 so that we can talk with servers
+ * which use the SSL hellos, which are often used for
+ * compatibility. We then disable SSL so we only allow OpenSSL
+ * to speak TLSv1 to perform the encryption itself.
+ */
git__ssl_ctx = SSL_CTX_new(SSLv23_method());
+ SSL_CTX_set_options(git__ssl_ctx,
+ SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3
+ /* Older OpenSSL and MacOS OpenSSL doesn't have this */
+# ifdef SSL_OP_NO_COMPRESSION
+ | SSL_OP_NO_COMPRESSION
+# endif
+ );
SSL_CTX_set_mode(git__ssl_ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_verify(git__ssl_ctx, SSL_VERIFY_NONE, NULL);
if (!SSL_CTX_set_default_verify_paths(git__ssl_ctx)) {