gnu: Add rust-rcgen-0.8.

* gnu/packages/crates-io.scm (rust-rcgen-0.8): New variable.

gnu/packages/crates-io.scm

@@ -47441,6 +47441,47 @@ (define-public rust-rayon-core-1
     (description "This package provides core APIs for Rayon.")
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-rcgen-0.8
+  (package
+    (name "rust-rcgen")
+    (version "0.8.14")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "rcgen" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32 "19qvlcz8kl046q85xa40p3xg7l78jganj83hdbawjhs17x0d24ar"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  ;; Don't use a vendored botan.
+                  (substitute* "Cargo.toml"
+                    ((".*vendored.*") ""))))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-chrono" ,rust-chrono-0.4)
+        ("rust-pem" ,rust-pem-1)
+        ("rust-ring" ,rust-ring-0.16)
+        ("rust-x509-parser" ,rust-x509-parser-0.12)
+        ("rust-yasna" ,rust-yasna-0.4)
+        ("rust-zeroize" ,rust-zeroize-1))
+       #:cargo-development-inputs
+       (("rust-botan" ,rust-botan-0.8)
+        ("rust-openssl" ,rust-openssl-0.10)
+        ("rust-rand" ,rust-rand-0.8)
+        ("rust-rsa" ,rust-rsa-0.5)
+        ("rust-webpki" ,rust-webpki-0.22)
+        ("rust-x509-parser" ,rust-x509-parser-0.12))))
+    (native-inputs
+     (list pkg-config))
+    (inputs
+     (list botan openssl))
+    (home-page "https://github.com/est31/rcgen")
+    (synopsis "Rust X.509 certificate generator")
+    (description "Rust X.509 certificate generator")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-rctree-0.4
   (package
     (name "rust-rctree")