http: allow use of TLS 1.3

Add a tlsv1.3 option to http.sslVersion in addition to the existing tlsv1.[012] options. libcurl has supported this since 7.52.0. This requires OpenSSL 1.1.1 with TLS 1.3 enabled or curl built with recent versions of NSS or BoringSSL as the TLS backend. Signed-off-by: Loganaden Velvindron <logan@hackers.mu> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Loganaden Velvindron committed Mar 29, 2018 at 14:14 UTC d81b651f56060038a1547f4beb949122533a8165
2 files changed +4
Documentation/config.txt
+1
@@ -1948,6 +1948,7 @@ http.sslVersion::
1948 - tlsv1.0
1949 - tlsv1.1
1950 - tlsv1.2
1951 + - tlsv1.3
1952
1953 +
1954 Can be overridden by the `GIT_SSL_VERSION` environment variable.
http.c
+3
@@ -62,6 +62,9 @@ static struct {
62 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
63 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
64 #endif
65 +#if LIBCURL_VERSION_NUM >= 0x073400
66 + { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
67 +#endif
68 };
69 #if LIBCURL_VERSION_NUM >= 0x070903
70 static const char *ssl_key;