Node. js-how to implement Md5withRsaphp, python, or nodejs, or how it works?

The customer interface is implemented in java. The md5withrsa used for verification can be understood after it is opened and put in one piece. Please explain it !!!! With java Implementation: {code ...} the customer interface is implemented in java. The md5withrsa used for verification can be understood after it is opened and put in one piece. Please explain it !!!!
With java Implementation:

Package main; import java. security. keyFactory; import java. security. keyPair; import java. security. noSuchAlgorithmException; import java. security. privateKey; import java. security. publicKey; import java. security. signature; import java. security. interfaces. rsw.vatekey; import java. security. interfaces. RSAPublicKey; import java. security. spec. PKCS8EncodedKeySpec; import java. security. spec. x509EncodedKeySpec; import java. security. secureRandom; public class main {/*** generate the key */public static void makeKey () {String KEY_ALGORITHM = "rsa"; java. security. keyPairGenerator keygen; try {keygen = java. security. keyPairGenerator. getInstance (KEY_ALGORITHM); SecureRandom secrand = new SecureRandom (); secrand. setSeed ("tmriPayment ". getBytes (); // initialize the keygen of the random generator. initialize (1024); KeyPair keys = keygen. genKeyPair (); RSAPublicKey pubkey = (RSAPublicKey) keys. getPublic (); rsw.vatekey prikey = (rsw.vatekey) keys. getPrivate (); String pubKeyStr = Base64Util. encodeBase64 (pubkey. getEncoded (); // get the public key and encode it with base64 String priKeyStr = Base64Util. encodeBase64 (prikey. getEncoded (); // obtain the private key and perform base64 encoding System. out. println ("Public Key:" + pubKeyStr); System. out. println ("Private Key:" + priKeyStr);} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch block e. printStackTrace ();} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace () ;}/ **** encrypted * @ return */public static String encodeData () {try {byte [] data = "fdfdfsdfdfd ". getBytes (); string privateKey = "signature + HDPD684NSGGGnL" + "signature ++ YbMcZOrRFT + signature" + "signature" + "plaintext/Signature" + "plaintext" + "yNebfGLKyZtIc/Signature/" +" examples/mPSd "+" examples/Examples "+" examples/hXVCd "+" O72/OKRlecfBu1449H2/ZvijkB/samples/ePaLYUCQDHj "+" examples/Examples "+" UywYDzvHtLyrUbbR/Examples" + "aBoGSbpRcPcGFfFMY + fd/kdmEambYn + 270 DNHPvqljU = "; byte [] keyBytes; keyBytes = Base64Util. decodeBase64 (privateKey); PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec (keyBytes); KeyFactory keyFactory = KeyFactory. getInstance ("RSA"); PrivateKey priKey = keyFactory. generatePrivate (pkcs8KeySpec); Signature signature = Signature. getInstance ("MD5withRSA"); signature. initSign (priKey); signature. update (data); // data is the byte array of the source data to generate the signature return Base64Util. encodeBase64 (Base64Util. encodeBase64 (signature. sign ()). getBytes ();} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace ();} // base64 decoding of the private key return "";}/*** decryption * @ return */public static Boolean decodeData (String msg) {String publicKey = "encrypt/bvvg6k3169igtwky4yacvsr2c0zycviz + decrypt"; try {byte [] data = "fdfdfsdfdfd ". getBytes (); byte [] publicKey1 = Base64Util. decodeBase64 (publicKey); // perform base64 decoding on the provided public key. byte [] sign = Base64Util. decodeBase64 (new String (Base64Util. decodeBase64 (msg); // The signature requires secondary base64 decoding X509EncodedKeySpec keySpec = new X509EncodedKeySpec (publicKey1); KeyFactory keyFactory = KeyFactory. getInstance ("RSA"); PublicKey pubKey = keyFactory. generatePublic (keySpec); Signature signature = Signature. getInstance ("MD5withRSA"); signature. initVerify (pubKey); signature. update (data); return signature. verify (sign);} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace ();} // decodes the private key using base64; return false;} public static void main (String [] args) throws Exception {// TODO Auto-generated method stub // makeKey (); String msg = encodeData (); // System. out. println (msg); // String msg = "plaintext ="; // Boolean data = decodeData (msg); // System. out. println (data );}}

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The customer interface is implemented in java. The md5withrsa used for verification can be understood after it is opened and put in one piece. Please explain it !!!!
With java Implementation:

Package main; import java. security. keyFactory; import java. security. keyPair; import java. security. noSuchAlgorithmException; import java. security. privateKey; import java. security. publicKey; import java. security. signature; import java. security. interfaces. rsw.vatekey; import java. security. interfaces. RSAPublicKey; import java. security. spec. PKCS8EncodedKeySpec; import java. security. spec. x509EncodedKeySpec; import java. security. secureRandom; public class main {/*** generate the key */public static void makeKey () {String KEY_ALGORITHM = "rsa"; java. security. keyPairGenerator keygen; try {keygen = java. security. keyPairGenerator. getInstance (KEY_ALGORITHM); SecureRandom secrand = new SecureRandom (); secrand. setSeed ("tmriPayment ". getBytes (); // initialize the keygen of the random generator. initialize (1024); KeyPair keys = keygen. genKeyPair (); RSAPublicKey pubkey = (RSAPublicKey) keys. getPublic (); rsw.vatekey prikey = (rsw.vatekey) keys. getPrivate (); String pubKeyStr = Base64Util. encodeBase64 (pubkey. getEncoded (); // get the public key and encode it with base64 String priKeyStr = Base64Util. encodeBase64 (prikey. getEncoded (); // obtain the private key and perform base64 encoding System. out. println ("Public Key:" + pubKeyStr); System. out. println ("Private Key:" + priKeyStr);} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch block e. printStackTrace ();} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace () ;}/ **** encrypted * @ return */public static String encodeData () {try {byte [] data = "fdfdfsdfdfd ". getBytes (); string privateKey = "signature + HDPD684NSGGGnL" + "signature ++ YbMcZOrRFT + signature" + "signature" + "plaintext/Signature" + "plaintext" + "yNebfGLKyZtIc/Signature/" +" examples/mPSd "+" examples/Examples "+" examples/hXVCd "+" O72/OKRlecfBu1449H2/ZvijkB/samples/ePaLYUCQDHj "+" examples/Examples "+" UywYDzvHtLyrUbbR/Examples" + "aBoGSbpRcPcGFfFMY + fd/kdmEambYn + 270 DNHPvqljU = "; byte [] keyBytes; keyBytes = Base64Util. decodeBase64 (privateKey); PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec (keyBytes); KeyFactory keyFactory = KeyFactory. getInstance ("RSA"); PrivateKey priKey = keyFactory. generatePrivate (pkcs8KeySpec); Signature signature = Signature. getInstance ("MD5withRSA"); signature. initSign (priKey); signature. update (data); // data is the byte array of the source data to generate the signature return Base64Util. encodeBase64 (Base64Util. encodeBase64 (signature. sign ()). getBytes ();} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace ();} // base64 decoding of the private key return "";}/*** decryption * @ return */public static Boolean decodeData (String msg) {String publicKey = "encrypt/bvvg6k3169igtwky4yacvsr2c0zycviz + decrypt"; try {byte [] data = "fdfdfsdfdfd ". getBytes (); byte [] publicKey1 = Base64Util. decodeBase64 (publicKey); // perform base64 decoding on the provided public key. byte [] sign = Base64Util. decodeBase64 (new String (Base64Util. decodeBase64 (msg); // The signature requires secondary base64 decoding X509EncodedKeySpec keySpec = new X509EncodedKeySpec (publicKey1); KeyFactory keyFactory = KeyFactory. getInstance ("RSA"); PublicKey pubKey = keyFactory. generatePublic (keySpec); Signature signature = Signature. getInstance ("MD5withRSA"); signature. initVerify (pubKey); signature. update (data); return signature. verify (sign);} catch (Exception e) {// TODO Auto-generated catch block e. printStackTrace ();} // decodes the private key using base64; return false;} public static void main (String [] args) throws Exception {// TODO Auto-generated method stub // makeKey (); String msg = encodeData (); // System. out. println (msg); // String msg = "plaintext ="; // Boolean data = decodeData (msg); // System. out. println (data );}}