encryption - RSA encrypt and decrypt between java and go -

in java encrypt string rsa : "hello,i plaintext string!@sina.com" get:

kkkhf5qsxx8adadk66aoysmv8loi4vwuanal+7kv6va/5zr7pswgrs5bzbk4vmyk9fa5clqolr2n b6oupnwpgq3af7pn/f45+pdtkrsblx8+q/mw7toyr525e7nvepdblm2wlqz4gh5qmqzei3me3zc3 030jrg0geg13n/1ezmo=

but tried many methods , couldn't decrypt in go. what's problem?

any appreciated, thanks.

here code:

java:

public static void main(string[] args) throws exception {   string pubkey_from_go="migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqdzsfv1qscqydy4vy+p4e3catmv"+             "ppxqcrvrf1cb4drkv0hau24y7m5qytt52kr539rdbkkdlam6s20lwy7+5c0dgacd"+             "wywd/7pecelyeipzjl07vro7ate8bfjya+wltgk9+xnuihiumukulw4kdx21+1nl"+             "auej6pew+dakmjwf6qidaqab";  string plaintext = "hello,i  plaintext string!@sina.com";  string encryptstring=encbygopubkey(pubkey_from_go,plaintext); } public static string encbygopubkey(string pubkey_from_go,string plaintext) throws exception {     cipher cipher = cipher.getinstance("rsa");//cipher.getinstance("rsa/ecb/pkcs1padding");       byte[] plaintextbytes = plaintext.getbytes();        publickey pubkey_go=getpublickey(pubkey_from_go);     cipher.init(cipher.encrypt_mode, pubkey_go);       byte[] enbytes = cipher.dofinal(plaintextbytes);       string encryptstring = (new base64encoder()).encode(enbytes);       return encryptstring;    } public static publickey getpublickey(string key) throws exception {     byte[] keybytes;     keybytes = (new base64decoder()).decodebuffer(key);      x509encodedkeyspec keyspec = new x509encodedkeyspec(keybytes);     keyfactory keyfactory = keyfactory.getinstance("rsa");     publickey publickey = keyfactory.generatepublic(keyspec);     return publickey;   }   

go:

import (         "crypto/rand"         "crypto/rsa"         // "crypto/sha1"         "crypto/x509"         "encoding/base64"         "encoding/pem"         "errors"         // "flag"         "fmt"         "github.com/astaxie/beego"     ) var publickey = []byte(`     -----begin public key-----     migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqdzsfv1qscqydy4vy+p4e3catmv     ppxqcrvrf1cb4drkv0hau24y7m5qytt52kr539rdbkkdlam6s20lwy7+5c0dgacd     wywd/7pecelyeipzjl07vro7ate8bfjya+wltgk9+xnuihiumukulw4kdx21+1nl     auej6pew+dakmjwf6qidaqab     -----end public key-----     `)     var privatekey = []byte(`     -----begin rsa private key-----     miicxqibaakbgqdzsfv1qscqydy4vy+p4e3catmvppxqcrvrf1cb4drkv0hau24y     7m5qytt52kr539rdbkkdlam6s20lwy7+5c0dgacdwywd/7pecelyeipzjl07vro7     ate8bfjya+wltgk9+xnuihiumukulw4kdx21+1nlauej6pew+dakmjwf6qidaqab     aogbajlnxentqj6ofcl9fmr2jlmjjtmrtqt9inqee7m3m7blhec+mcjohmnvbjam     zpthdordxiz6ocuof6z2+dl35lntgfh5j7s34up2bwzf1iyyqfyscnexgnhkt1g1     xkqthmtc2gwwtheg+s6ciiyw2igrrp2rke81vyhexprexf0hakea9izb0miysmcb     /jemljb0lb3y/b8xjgjqffbqt7bmwbvjvzwzvpnmnxi9swgdgupxscuairoxjz40     irz2c9eouwjbaopjpvv8sgw4vaseoqljvsq/c/pifx6rvzndglc8brg7sgtppjhg     4g+m3mvgpcx1a/eu1mb+fhij2laz/ptty6scqgaw9nwiwu3drivgcsmm0myh/3x9     dacwlsjoctiodq1fq9rrede5qfpjnajdjfsijntx1f+l3yceebxtw0ynz2mcqbi8     9kp274is5fkwkufnknukuk4wkouexeo+lpr+vihs7k6wq8ngdd4/mujojbr5mkrw     dpwqa3n5tmndqvgv8gmcqqcakgjgwygvo3/milffimbp+m7/y3vcptarldxryqwo     aqjxwc71zgbfdityvdgjm1mtqc8xqek1fxn1vfpy2c6o     -----end rsa private key-----     `     func rsaencrypt(origdata []byte, pubkey []byte) ([]byte, error) {         block, _ := pem.decode(pubkey)         if block == nil {             return nil, errors.new("public key error")         }         pubinterface, err := x509.parsepkixpublickey(block.bytes)         if err != nil {             return nil, err         }         pub := pubinterface.(*rsa.publickey)         return rsa.encryptpkcs1v15(rand.reader, pub, origdata)     }      func rsadecrypt(ciphertext []byte, privkey []byte) ([]byte, error) {         block, _ := pem.decode(privkey)         if block == nil {             return nil, errors.new("private key error!")         }         priv, err := x509.parsepkcs1privatekey(block.bytes)         if err != nil {             return nil, err         }         return rsa.decryptpkcs1v15(rand.reader, priv, ciphertext)     } var data64 string = `kkkhf5qsxx8adadk66aoysmv8loi4vwuanal+7kv6va/5zr7pswgrs5bzbk4vmyk9fa5clqolr2nb6oupnwpgq3af7pn/f45+pdtkrsblx8+q/mw7toyr525e7nvepdblm2wlqz4gh5qmqzei3me3zc3030jrg0geg13n/1ezmo=`     func main() {         data, _ := base64.stdencoding.decodestring(data64)         origdata, _ := rsadecrypt(data, privatekey)         fmt.println("rsa-------" + string(origdata))     } 

try use padding in java encrypt. know nothing "go" in java encrypting message no padding.

cipher cipher = cipher.getinstance("rsa"); 

in code snippet change "rsa" "rsa/ecb/pkcs1padding" since in "go" see using function called "decryptpkcs1v15", pkcs1 v1.5 standard means pkcs#1 padding used. hope helps you.