gnu: Add rust-aes-soft-0.4.

* gnu/packages/crates-io.scm (rust-aes-soft-0.4): New variable.

gnu/packages/crates-io.scm

@@ -194,6 +194,32 @@ the Rust programming language.")
         (sha256
          (base32
           "1rw11hycfjhqbc7z1smn75m0sczq519msjwimxh7b8s6n4pzk5r7"))))
+(define-public rust-aes-soft-0.4
+  (package
+    (name "rust-aes-soft")
+    (version "0.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "aes-soft" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "19szsg0qqxq42k7bj5p3svb147n8wxy9a20n4g7mcl2fwrz689a9"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-block-cipher" ,rust-block-cipher-0.7)
+        ("rust-byteorder" ,rust-byteorder-1)
+        ("rust-opaque-debug" ,rust-opaque-debug-0.2))
+       #:cargo-development-inputs
+       (("rust-block-cipher" ,rust-block-cipher-0.7))))
+    (home-page "https://github.com/RustCrypto/block-ciphers")
+    (synopsis "Bit-sliced implementation of AES (Rijndael) block ciphers")
+    (description "This package provides a bit-sliced implementation of
+AES (Rijndael) block ciphers.")
+    (license (list license:expat license:asl2.0))))
+
     (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t