RSA Digital Signature Algorithm (Java edition)

Digital Signature Algorithm Java version or on the code bar

        public static final String sign_algorithms = "Sha1withrsa"; /** * RSA Signature * @param content pending Signature data * @param privatekey private key * @param input_charset encoded format * @return Signature value */Publi c static string sign (string content, String Privatekey, String input_charset) {try {byte[] de           Code =base64.getdecoder (). Decode (Privatekey);           Pkcs8encodedkeyspec priPKCS8 = new Pkcs8encodedkeyspec (decode);           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 ();        Return Base64.getencoder (). encodetostring (Signed);        } catch (Exception e) {e.printstacktrace ();    } return null;         }

　　

Call Mode:

String sign = sign ("Content", "Privatekey", "utf-8");

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RSA Digital Signature Algorithm (Java edition)