gnu: Add hash-extender.

* gnu/packages/crypto.scm (hash-extender): New variable.
* gnu/packages/patches/hash-extender-test-suite.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register the new file.

gnu/local.mk

@@ -1005,6 +1005,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/gtksourceview-2-add-default-directory.patch \
   %D%/packages/patches/gzdoom-search-in-installed-share.patch	\
   %D%/packages/patches/gzdoom-find-system-libgme.patch	\
+  %D%/packages/patches/hash-extender-test-suite.patch		\
   %D%/packages/patches/haskell-mode-unused-variables.patch	\
   %D%/packages/patches/haskell-mode-make-check.patch		\
   %D%/packages/patches/hdf4-architectures.patch 		\

gnu/packages/crypto.scm

@@ -14,6 +14,7 @@
 ;;; Copyright © 2018 Tim Gesthuizen <tim.gesthuizen@yahoo.de>
 ;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019 Tanguy Le Carrour <tanguy@bioneland.org>
+;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1072,3 +1073,47 @@ (define-public libolm
 API.")
     (home-page "https://matrix.org/docs/projects/other/olm/")
     (license license:asl2.0)))
+
+(define-public hash-extender
+  (let ((commit "9ecef26809a1ceea2a455f6f591b004298df551b")
+        (revision "1"))
+    (package
+      (name "hash-extender")
+      (version (git-version "0.0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/iagox86/hash_extender")
+                      (commit commit)))
+                (sha256
+                 (base32
+                  "0fqy3d559zgf71w39py0931d8na0ylils45r8zs6r79wgr6qn78c"))
+                (file-name (git-file-name name version))
+                (patches
+                  (search-patches "hash-extender-test-suite.patch"))))
+      (build-system gnu-build-system)
+      (arguments
+       `(#:phases
+         (modify-phases %standard-phases
+           (delete 'configure)
+           (replace 'check
+             (lambda _
+               (invoke "./hash_extender_test")))
+           (replace 'install
+             (lambda* (#:key outputs #:allow-other-keys)
+               (let* ((outdir (assoc-ref outputs "out"))
+                      (bindir (string-append outdir "/bin"))
+                      (docdir (string-append outdir
+                                             "/share/doc/hash-extender-"
+                                             ,version)))
+                 (install-file "hash_extender" bindir)
+                 (install-file "README.md" docdir)
+                 #t))))))
+      (inputs
+       `(("openssl" ,openssl)))
+      (synopsis "Tool for hash length extension attacks")
+      (description "@command{hash_extender} is a utility for performing hash
+length extension attacks supporting MD4, MD5, RIPEMD-160, SHA-0, SHA-1,
+SHA-256, SHA-512, and WHIRLPOOL hashes.")
+      (home-page "https://github.com/iagox86/hash_extender")
+      (license license:bsd-3))))

gnu/packages/patches/hash-extender-test-suite.patch

@@ -0,0 +1,13 @@
+Make the test suite exit with a non-zero exit code if some tests failed.
+Pull request pending upstream: https://github.com/iagox86/hash_extender/pull/13
+--- a/test.c
++++ b/test.c
+@@ -79,5 +79,9 @@ void test_report(void)
+     printf("TESTS PASSED: %d / %d [%2.4f%%]\n", tests_passed, tests_run, 100 * (float)tests_passed / tests_run);
+     printf("--------------------------------------------------------------------------------\n");
+   }
++
++  if (tests_passed != tests_run) {
++      exit(1);
++  }
+ }