1 files changed, 27 insertions, 0 deletions
diff --git a/src/main/scala/com/getbootstrap/savage/crypto/Sha1WithRsa.scala b/src/main/scala/com/getbootstrap/savage/crypto/Sha1WithRsa.scala
new file mode 100644
index 0000000..c01afee
--- /dev/null
+++ b/src/main/scala/com/getbootstrap/savage/crypto/Sha1WithRsa.scala
@@ -0,0 +1,27 @@
+package com.getbootstrap.savage.crypto
+
+import java.security.Signature
+import java.security.SignatureException
+import java.security.InvalidKeyException
+
+
+object Sha1WithRsa {
+  private val signatureAlgorithmName = "SHA1withRSA" // Supported in all spec-compliant JVMs
+  private def newSignatureVerifier(): Signature = Signature.getInstance(signatureAlgorithmName)
+
+  def verifySignature(signature: Array[Byte], publicKey: RsaPublicKey, signedData: Array[Byte]): SignatureVerificationStatus = {
+    val verifier = newSignatureVerifier()
+    try {
+      verifier.initVerify(publicKey.publicKey)
+      verifier.update(signedData)
+      verifier.verify(signature) match {
+        case true => SuccessfullyVerified
+        case false => FailedVerification
+      }
+    }
+    catch {
+      case keyExc:InvalidKeyException => ExceptionDuringVerification(keyExc)
+      case sigExc:SignatureException => ExceptionDuringVerification(sigExc)
+    }
+  }
+}