gnu: Add perl-math-random-secure.

* gnu/packages/crypto.scm (perl-math-random-secure): New variable.

gnu/packages/crypto.scm

@@ -524,3 +524,42 @@ generator.")
     (description "This module provides implementations for a number of
 byte-oriented sources of random data.")
     (license (package-license perl))))
+
+(define-public perl-math-random-secure
+  (package
+    (name "perl-math-random-secure")
+    (version "0.080001")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://cpan/authors/id/F/FR/FREW/"
+                           "Math-Random-Secure-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0dgbf4ncll4kmgkyb9fsaxn0vf2smc9dmwqzgh3259zc2zla995z"))))
+    (build-system perl-build-system)
+    (native-inputs
+     `(("perl-list-moreutils" ,perl-list-moreutils)
+       ("perl-test-leaktrace" ,perl-test-leaktrace)
+       ("perl-test-sharedfork" ,perl-test-sharedfork)
+       ("perl-test-warn" ,perl-test-warn)))
+    (inputs
+     `(("perl-crypt-random-source" ,perl-crypt-random-source)
+       ("perl-math-random-isaac" ,perl-math-random-isaac)
+       ("perl-math-random-isaac-xs" ,perl-math-random-isaac-xs)
+       ("perl-moo" ,perl-moo)))
+    (home-page "http://search.cpan.org/dist/Math-Random-Secure")
+    (synopsis "Cryptographically secure replacement for rand()")
+    (description "This module is intended to provide a
+cryptographically-secure replacement for Perl's built-in @code{rand} function.
+\"Crytographically secure\", in this case, means:
+
+@enumerate
+@item No matter how many numbers you see generated by the random number
+generator, you cannot guess the future numbers, and you cannot guess the seed.
+@item There are so many possible seeds that it would take decades, centuries,
+or millenia for an attacker to try them all.
+@item The seed comes from a source that generates relatively strong random
+data on your platform, so the seed itself will be as random as possible.
+@end enumerate\n")
+    (license license:artistic2.0)))