support ssl verify (built on atop of 1135)

gix-transport/src/client/blocking_io/http/curl/remote.rs

@@ -157,6 +157,7 @@ pub fn new() -> (
                     verbose,
                     ssl_ca_info,
                     ssl_version,
+                    ssl_verify,
                     http_version,
                     backend,
                 },
@@ -194,6 +195,9 @@ pub fn new() -> (
                 }
             }
 
+            handle.ssl_verify_peer(ssl_verify)?;
+            handle.ssl_verify_host(ssl_verify)?;
+
             if let Some(http_version) = http_version {
                 let version = match http_version {
                     HttpVersion::V1_1 => curl::easy::HttpVersion::V11,

gix-transport/src/client/blocking_io/http/mod.rs

@@ -120,7 +120,7 @@ pub mod options {
 
 /// Options to configure http requests.
 // TODO: testing most of these fields requires a lot of effort, unless special flags to introspect ongoing requests are added.
-#[derive(Default, Clone)]
+#[derive(Clone)]
 pub struct Options {
     /// Headers to be added to every request.
     /// They are applied unconditionally and are expected to be valid as they occur in an HTTP request, like `header: value`, without newlines.
@@ -179,12 +179,39 @@ pub struct Options {
     pub ssl_ca_info: Option<PathBuf>,
     /// The SSL version or version range to use, or `None` to let the TLS backend determine which versions are acceptable.
     pub ssl_version: Option<SslVersionRangeInclusive>,
+    /// Controls whether to perform SSL identity verification or not. Turning this off is not recommended and can lead to
+    /// various security risks. An example where this may be needed is when an internal git server uses a self-signed
+    /// certificate and the user accepts the associated security risks.
+    pub ssl_verify: bool,
     /// The HTTP version to enforce. If unset, it is implementation defined.
     pub http_version: Option<HttpVersion>,
     /// Backend specific options, if available.
     pub backend: Option<Arc<Mutex<dyn Any + Send + Sync + 'static>>>,
 }
 
+impl Default for Options {
+    fn default() -> Self {
+        Options {
+            extra_headers: vec![],
+            follow_redirects: Default::default(),
+            low_speed_limit_bytes_per_second: 0,
+            low_speed_time_seconds: 0,
+            proxy: None,
+            no_proxy: None,
+            proxy_auth_method: Default::default(),
+            proxy_authenticate: None,
+            user_agent: None,
+            connect_timeout: None,
+            verbose: false,
+            ssl_ca_info: None,
+            ssl_version: None,
+            ssl_verify: true,
+            http_version: None,
+            backend: None,
+        }
+    }
+}
+
 /// The actual http client implementation, using curl
 #[cfg(feature = "http-client-curl")]
 pub type Impl = curl::Curl;

gix/src/config/cache/init.rs

@@ -390,6 +390,15 @@ fn apply_environment_overrides(
                 },
             ],
         ),
+        (
+            "gitoxide",
+            Some(Cow::Borrowed("http".into())),
+            git_prefix,
+            &[{
+                let key = &gitoxide::Http::SSL_NO_VERIFY;
+                (env(key), key.name)
+            }],
+        ),
         (
             "gitoxide",
             Some(Cow::Borrowed("credentials".into())),

gix/src/config/tree/sections/gitoxide.rs

@@ -179,6 +179,14 @@ mod subsections {
             http::SslVersion::new_ssl_version("sslVersionMax", &Gitoxide::HTTP).with_note(
                 "entirely new to set the upper bound for the allowed ssl version range. Overwrites the max bound of `http.sslVersion` if set. Min and Max must be set to become effective.",
             );
+        /// The `gitoxide.http.sslNoVerify` key.
+        ///
+        /// If set, disable SSL verification. Using this is discouraged as it can lead to
+        /// various security risks. An example where this may be needed is when an internal
+        /// git server uses a self-signed certificate and the user accepts the associated security risks.
+        pub const SSL_NO_VERIFY: keys::Boolean = keys::Boolean::new_boolean("sslNoVerify", &Gitoxide::HTTP)
+            .with_environment_override("GIT_SSL_NO_VERIFY")
+            .with_note("used to disable SSL verification. When this is enabled it takes priority over http.sslVerify");
         /// The `gitoxide.http.proxyAuthMethod` key.
         pub const PROXY_AUTH_METHOD: http::ProxyAuthMethod =
             http::ProxyAuthMethod::new_proxy_auth_method("proxyAuthMethod", &Gitoxide::HTTP)
@@ -199,6 +207,7 @@ mod subsections {
                 &Self::CONNECT_TIMEOUT,
                 &Self::SSL_VERSION_MIN,
                 &Self::SSL_VERSION_MAX,
+                &Self::SSL_NO_VERIFY,
                 &Self::PROXY_AUTH_METHOD,
             ]
         }

gix/src/config/tree/sections/http.rs

@@ -10,6 +10,9 @@ impl Http {
         .with_deviation(
             "accepts the new 'default' value which means to use the curl default just like the empty string does",
         );
+    /// The `http.sslVerify` key.
+    pub const SSL_VERIFY: keys::Boolean = keys::Boolean::new_boolean("sslVerify", &config::Tree::HTTP)
+        .with_note("also see the `gitoxide.http.sslNoVerify` key");
     /// The `http.proxy` key.
     pub const PROXY: keys::String =
         keys::String::new_string("proxy", &config::Tree::HTTP).with_deviation("fails on strings with illformed UTF-8");
@@ -58,6 +61,7 @@ impl Section for Http {
     fn keys(&self) -> &[&dyn Key] {
         &[
             &Self::SSL_VERSION,
+            &Self::SSL_VERIFY,
             &Self::PROXY,
             &Self::PROXY_AUTH_METHOD,
             &Self::VERSION,

gix/src/repository/config/transport.rs

@@ -405,6 +405,30 @@ impl crate::Repository {
                         }
                     }
 
+                    {
+                        let key = "gitoxide.http.sslNoVerify";
+                        let ssl_no_verify = config
+                            .boolean_filter_by_key(key, &mut trusted_only)
+                            .map(|value| config::tree::gitoxide::Http::SSL_NO_VERIFY.enrich_error(value))
+                            .transpose()
+                            .with_leniency(lenient)
+                            .map_err(config::transport::http::Error::from)?
+                            .unwrap_or_default();
+
+                        if ssl_no_verify {
+                            opts.ssl_verify = false;
+                        } else {
+                            let key = "http.sslVerify";
+                            opts.ssl_verify = config
+                                .boolean_filter_by_key(key, &mut trusted_only)
+                                .map(|value| config::tree::Http::SSL_VERIFY.enrich_error(value))
+                                .transpose()
+                                .with_leniency(lenient)
+                                .map_err(config::transport::http::Error::from)?
+                                .unwrap_or(true);
+                        }
+                    }
+
                     #[cfg(feature = "blocking-http-transport-curl")]
                     {
                         let key = "http.schannelCheckRevoke";

gix/tests/fixtures/make_config_repos.sh

@@ -164,3 +164,14 @@ mkdir not-a-repo-with-files;
 (cd not-a-repo-with-files
   touch this that
 )
+
+git init ssl-verify-disabled
+(cd ssl-verify-disabled
+  git config http.sslVerify false
+)
+
+git init ssl-no-verify-enabled
+(cd ssl-no-verify-enabled
+  git config http.sslVerify true
+  git config gitoxide.http.sslNoVerify true
+)

gix/tests/gix-init.rs

@@ -19,6 +19,7 @@ mod with_overrides {
             .set("GIT_HTTP_LOW_SPEED_LIMIT", "1")
             .set("GIT_HTTP_LOW_SPEED_TIME", "1")
             .set("GIT_HTTP_PROXY_AUTHMETHOD", "proxy-auth-method-env")
+            .set("GIT_SSL_NO_VERIFY", "true")
             .set("GIT_CURL_VERBOSE", "true")
             .set("https_proxy", "https-lower-override")
             .set("HTTPS_PROXY", "https-upper")
@@ -231,6 +232,7 @@ mod with_overrides {
             ]
         );
         for (key, expected) in [
+            ("gitoxide.http.sslNoVerify", "true"),
             ("gitoxide.http.verbose", "true"),
             ("gitoxide.allow.protocolFromUser", "file-allowed"),
             ("core.useReplaceRefs", "no-replace"),

gix/tests/repository/config/transport_options.rs

@@ -55,6 +55,7 @@ mod http {
             verbose,
             ssl_ca_info,
             ssl_version,
+            ssl_verify,
             http_version,
             backend,
         } = http_options(&repo, None, "https://example.com/does/not/matter");
@@ -106,6 +107,8 @@ mod http {
                 max: version
             })
         );
+
+        assert!(ssl_verify, "SSL verification is enabled by default if not configured");
         assert_eq!(http_version, Some(HttpVersion::V1_1));
     }
 
@@ -314,4 +317,23 @@ mod http {
         assert_eq!(opts.proxy.as_deref(), Some("http://localhost:9090"));
         assert_eq!(opts.follow_redirects, FollowRedirects::Initial);
     }
+
+    #[test]
+    fn ssl_verify_disabled() {
+        let repo = repo("ssl-verify-disabled");
+
+        let opts = http_options(&repo, None, "https://example.com/does/not/matter");
+        assert!(!opts.ssl_verify);
+    }
+
+    #[test]
+    fn ssl_no_verify_takes_precedence() {
+        let repo = repo("ssl-no-verify-enabled");
+
+        let opts = http_options(&repo, None, "https://example.com/does/not/matter");
+        assert!(
+            !opts.ssl_verify,
+            "even with `http.sslVerify` enabled, `gitoxide.http.sslNoVerify` takes precedence`"
+        );
+    }
 }

src/plumbing/progress.rs

@@ -408,10 +408,6 @@ static GIT_CONFIG: &[Record] = &[
         config: "http.sslCipherList",
         usage: NotPlanned { reason: "on demand" }
     },
-    Record {
-        config: "http.sslVerify",
-        usage: NotPlanned { reason: "on demand" }
-    },
     Record {
         config: "http.sslCert",
         usage: NotPlanned { reason: "on demand" }