gnu: Add rust-sequoia-autocrypt-0.23.

* gnu/packages/sequoia.scm (rust-sequoia-autocrypt-0.23): New variable.

gnu/packages/sequoia.scm

@@ -39,6 +39,37 @@
   #:use-module (gnu packages sqlite)
   #:use-module (gnu packages tls))
 
+(define-public rust-sequoia-autocrypt-0.23
+  (package
+    (name "rust-sequoia-autocrypt")
+    (version "0.23.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "sequoia-autocrypt" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32 "0skj0dv15341v470g6w5pggsl0iy27qb8h24rr8k6rq7vxdjxl7g"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:skip-build? #t
+        #:cargo-inputs
+        (("rust-base64" ,rust-base64-0.13)
+         ("rust-sequoia-openpgp" ,rust-sequoia-openpgp-1))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'remove-other-crypto-features
+           (lambda _
+             (substitute* "Cargo.toml"
+               (("^crypto-cng =" line) (string-append "# " line))
+               (("^crypto-rust =" line) (string-append "# " line))))))))
+    (home-page "https://sequoia-pgp.org/")
+    (synopsis "Deal with Autocrypt encoded data")
+    (description "This crate implements low-level functionality like encoding
+and decoding of Autocrypt headers and setup messages.  Note: Autocrypt is more
+than just headers; it requires tight integration with the MUA.")
+    (license license:lgpl2.0+)))
+
 (define-public rust-sequoia-ipc-0.26
   (package
     (name "rust-sequoia-ipc")