VOL-1967 move api-server to separate repository
Change-Id: I21b85be74205805be15f8a85e53a903d16785671
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/rfc4757/checksum.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/rfc4757/checksum.go
new file mode 100644
index 0000000..45276e9
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/crypto/rfc4757/checksum.go
@@ -0,0 +1,40 @@
+package rfc4757
+
+import (
+ "bytes"
+ "crypto/hmac"
+ "crypto/md5"
+ "io"
+)
+
+// Checksum returns a hash of the data in accordance with RFC 4757
+func Checksum(key []byte, usage uint32, data []byte) ([]byte, error) {
+ // Create hashing key
+ s := append([]byte(`signaturekey`), byte(0x00)) //includes zero octet at end
+ mac := hmac.New(md5.New, key)
+ mac.Write(s)
+ Ksign := mac.Sum(nil)
+
+ // Format data
+ tb := UsageToMSMsgType(usage)
+ p := append(tb, data...)
+ h := md5.New()
+ rb := bytes.NewReader(p)
+ _, err := io.Copy(h, rb)
+ if err != nil {
+ return []byte{}, err
+ }
+ tmp := h.Sum(nil)
+
+ // Generate HMAC
+ mac = hmac.New(md5.New, Ksign)
+ mac.Write(tmp)
+ return mac.Sum(nil), nil
+}
+
+// HMAC returns a keyed MD5 checksum of the data
+func HMAC(key []byte, data []byte) []byte {
+ mac := hmac.New(md5.New, key)
+ mac.Write(data)
+ return mac.Sum(nil)
+}