Updating to work with CHICKEN 5.

Updated to work with CHICKEN 5. Thanks to Andy Bennett
<andyjpb@ashurst.eu.org> for doing most of the work!

Moved hmac.release-info* uri targz to point at code.thintz.com instead
of github.

hmac.egg

@@ -0,0 +1,11 @@
+; author: Thomas Hintz
+; email: t@thintz.com
+; license: bsd
+
+((license "BSD")
+ (category crypt)
+ (dependencies message-digest)
+ (test-dependencies test sha1 string-utils)
+ (author "Thomas Hintz")
+ (synopsis "HMAC provides a HMAC using the message-digest interface.")
+ (components (extension hmac)))

hmac.release-info

@@ -1,6 +1,4 @@
-(repo git "git://github.com/ThomasHintz/chicken-scheme-{egg-name}.git")   ; optional
-
-(uri targz "https://github.com/ThomasHintz/chicken-scheme-{egg-name}/tarball/{egg-release}")
+(uri targz "https://code.thintz.com/chicken-scheme-{egg-name}/snapshot/chicken-scheme-{egg-name}-{egg-release}.tar.gz")
 (release "1")
 (release "2")
 (release "3")
@@ -8,4 +6,5 @@
 (release "6")
 (release "7")
 (release "7.0.1")
-(release "7.1.0")
+(release "7.1.0")
+(release "7.2.0")

hmac.release-info.chicken-5

@@ -0,0 +1,2 @@
+(uri targz "https://code.thintz.com/chicken-scheme-{egg-name}/snapshot/chicken-scheme-{egg-name}-{egg-release}.tar.gz")
+(release "7.2.0")

hmac.scm

@@ -5,8 +5,18 @@
 (module hmac
   (hmac hmac-primitive)
 
-(import scheme chicken srfi-13)
-(use message-digest-basic message-digest-item message-digest-update-item)
+(import scheme)
+
+(cond-expand
+
+  (chicken-4
+    (import chicken srfi-13)
+    (use message-digest-basic message-digest-item message-digest-update-item))
+
+  (chicken-5
+    (import (chicken base) (chicken bitwise) srfi-13)
+    (import message-digest-basic message-digest-item message-digest-update-item)))
+
 
 (define (hmac-primitive key digest-primitive)
   (let ((block-size (message-digest-primitive-block-length digest-primitive))

hmac.setup

@@ -11,5 +11,4 @@
   ; Files to install for your extension:
   '("hmac.o" "hmac.so" "hmac.import.so")
   ; Assoc list with properties for your extension:
-  '((version 7.1.0)
-    (static "hmac.o"))) ;; for static linking
+  '((static "hmac.o"))) ;; for static linking

tests/run.scm

@@ -2,8 +2,16 @@
 ; email: t@thintz.com
 ; license: bsd
 
-(use test)
-(use sha1 string-utils hmac)
+(cond-expand
+
+  (chicken-4
+    (use test)
+    (use sha1 string-utils hmac))
+
+  (chicken-5
+    (import test)
+    (import sha1 string-hexadecimal hmac)))
+
 
 (test-group "RFC2202 test vectors"
   (define (testv key msg expected)