gnu: Add rust-botan-src-0.21703.

* gnu/packages/crates-io.scm (rust-botan-src-0.21703): New variable.

gnu/packages/crates-io.scm

@@ -7969,6 +7969,27 @@ programs.")
         ("rust-parking" ,rust-parking-1)
         ("rust-waker-fn" ,rust-waker-fn-1))))))
 
+(define-public rust-botan-src-0.21703
+  (package
+    (name "rust-botan-src")
+    (version "0.21703.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "botan-src" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0s2ad9q84qsrllfsbj7hjhn7gr3hab9ng6lwzwqmimia6yvja8y8"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin (delete-file-recursively "botan")))))
+    (build-system cargo-build-system)
+    (arguments '(#:skip-build? #t))
+    (home-page "https://botan.randombit.net/")
+    (synopsis "Sources of Botan cryptography library")
+    (description "Sources of Botan cryptography library")
+    (license license:expat)))
+
 (define-public rust-boxfnonce-0.1
   (package
     (name "rust-boxfnonce")