RSA Signature Verification

Importandroid.util.Base64;Importjava.security.KeyFactory;ImportJava.security.PrivateKey;ImportJava.security.PublicKey;ImportJava.security.spec.PKCS8EncodedKeySpec;ImportJava.security.spec.X509EncodedKeySpec;/*** Author:jsonlu * DATETIME:2016/6/23 19:50 * email:[email protected] * DESC:RSA Signature Verification Tool class **/ Public classRsautil {Private Static FinalString sign_algorithms = "Sha1withrsa"; //private key PKCS8 format    Private Static FinalString Sumpay_payment_private_key = ""; Private Static FinalString Sumpay_payment_server_public_key = ""; /*** RSA Signature * *@paramcontent pending Signature data *@paraminput_charset encoded format *@returnSignature Value*/     Public Staticstring sign (string content, String input_charset) {Try{pkcs8encodedkeyspec priPKCS8=NewPkcs8encodedkeyspec (Base64.decode (Sumpay_payment_private_key, Base64.default)); Keyfactory Keyf= Keyfactory.getinstance ("RSA"); Privatekey Prikey=keyf.generateprivate (priPKCS8); Java.security.Signature Signature=java.security.Signature.getInstance (SIGN_ALGORITHMS);            Signature.initsign (Prikey);            Signature.update (Content.getbytes (Input_charset)); byte[] Signed =signature.sign (); returnbase64.encodetostring (signed, Base64.default); } Catch(Exception e) {e.printstacktrace (); }        return NULL; }    /*** RSA Verification Signature Check * *@paramcontent pending Signature data *@paramSign Signature value *@paraminput_charset encoded format *@returnBoolean value*/     Public Static BooleanVerify (string content, string sign, string input_charset) {Try{keyfactory keyfactory= Keyfactory.getinstance ("RSA"); byte[] Encodedkey =Base64.decode (Sumpay_payment_server_public_key, Base64.default); PublicKey PubKey= Keyfactory.generatepublic (NewX509encodedkeyspec (Encodedkey)); Java.security.Signature Signature=java.security.Signature.getInstance (SIGN_ALGORITHMS);            Signature.initverify (PubKey);            Signature.update (Content.getbytes (Input_charset)); BooleanBverify =signature.verify (Base64.decode (sign, base64.default)); returnbverify; } Catch(Exception e) {e.printstacktrace (); }        return false; }}

RSA Signature Verification