On Fri, Aug 14, 2015 at 3:37 PM, Elia Pinto <gitter.spiros@xxxxxxxxx> wrote:
> Teach git about a new option, "http.sslVersion", which permits one to
> specify the SSL version to use when negotiating SSL connections. The
> setting can be overridden by the GIT_SSL_VERSION environment
> variable.
>
> Signed-off-by: Elia Pinto <gitter.spiros@xxxxxxxxx>
> ---
> This is the fifth version of the patch. Changes from the previous version:
>
> - Minor style changes (Eric)
Looks better. Thanks.
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index 315f271..b23b01a 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -1595,6 +1595,28 @@ http.saveCookies::
> If set, store cookies received during requests to the file specified by
> http.cookieFile. Has no effect if http.cookieFile is unset.
>
> +http.sslVersion::
> + The SSL version to use when negotiating an SSL connection, if you
> + want to force the default. The available and default version depend on
> + whether libcurl was built against NSS or OpenSSL and the particular configuration
> + of the crypto library in use. Internally this sets the 'CURLOPT_SSL_VERSION'
> + option; see the libcurl documentation for more details on the format
> + of this option and for the ssl version supported. Actually the possible values
> + of this option are:
> +
> + - sslv2
> + - sslv3
> + - tlsv1
> + - tlsv1.0
> + - tlsv1.1
> + - tlsv1.2
> +
> ++
> +Can be overridden by the 'GIT_SSL_VERSION' environment variable.
> +To force git to use libcurl's default ssl version and ignore any
> +explicit http.sslversion option, set 'GIT_SSL_VERSION' to the
> +empty string.
> +
> http.sslCipherList::
> A list of SSL ciphers to use when negotiating an SSL connection.
> The available ciphers depend on whether libcurl was built against
> diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
> index c97c648..6e9359c 100644
> --- a/contrib/completion/git-completion.bash
> +++ b/contrib/completion/git-completion.bash
> @@ -2118,6 +2118,7 @@ _git_config ()
> http.postBuffer
> http.proxy
> http.sslCipherList
> + http.sslVersion
> http.sslCAInfo
> http.sslCAPath
> http.sslCert
> diff --git a/http.c b/http.c
> index e9c6fdd..4c5a2e0 100644
> --- a/http.c
> +++ b/http.c
> @@ -37,6 +37,20 @@ static int curl_ssl_verify = -1;
> static int curl_ssl_try;
> static const char *ssl_cert;
> static const char *ssl_cipherlist;
> +static const char *ssl_version;
> +static struct {
> + const char *name;
> + long ssl_version;
> + } sslversions[] = {
> + { "sslv2", CURL_SSLVERSION_SSLv2 },
> + { "sslv3", CURL_SSLVERSION_TLSv1 },
> + { "tlsv1", CURL_SSLVERSION_TLSv1 },
> +#if LIBCURL_VERSION_NUM >= 0x072200
> + { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
> + { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
> + { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 }
> +#endif
> +};
> #if LIBCURL_VERSION_NUM >= 0x070903
> static const char *ssl_key;
> #endif
> @@ -190,6 +204,8 @@ static int http_options(const char *var, const char *value, void *cb)
> }
> if (!strcmp("http.sslcipherlist", var))
> return git_config_string(&ssl_cipherlist, var, value);
> + if (!strcmp("http.sslversion", var))
> + return git_config_string(&ssl_version, var, value);
> if (!strcmp("http.sslcert", var))
> return git_config_string(&ssl_cert, var, value);
> #if LIBCURL_VERSION_NUM >= 0x070903
> @@ -364,9 +380,23 @@ static CURL *get_curl_handle(void)
> if (http_proactive_auth)
> init_curl_http_auth(result);
>
> + if (getenv("GIT_SSL_VERSION"))
> + ssl_version = getenv("GIT_SSL_VERSION");
> + if (ssl_version && *ssl_version) {
> + int i;
> + for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
> + if (!strcmp(ssl_version, sslversions[i].name)) {
> + curl_easy_setopt(result, CURLOPT_SSLVERSION,
> + sslversions[i].ssl_version);
> + break;
> + }
> + }
> + if (i == ARRAY_SIZE(sslversions))
> + warning("unsupported ssl version %s: using default", ssl_version);
> + }
> +
> if (getenv("GIT_SSL_CIPHER_LIST"))
> ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
> -
> if (ssl_cipherlist != NULL && *ssl_cipherlist)
> curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
> ssl_cipherlist);
> --
> 2.5.0.235.gb9bd8dc
>
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