Android-Java RSA解密
作者:互联网
我需要从二进制字符串为RSA算法创建一个公共密钥.
我的代码是:
String pubKey = "tihq/Gk3OUs5NzP+XTRKXBwSxHtB0TWn0RREcpXEtp316tyD9DzKaIbdKexb/mRr";
byte[] keyBytes = Base64.decode(pubKey,Base64.DEFAULT);
//test if is correct: ok
Log.d("response keyBytes",new String(Base64.encode(keyBytes,Base64.DEFAULT)));
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
RSAPublicKey publicKey = (RSAPublicKey) keyFactory.generatePublic(spec);
//PublicKey publicKey = (PublicKey) keyFactory.generatePublic(spec);
但是我有这个错误:
java.security.spec.InvalidKeySpecException: java.lang.RuntimeException: error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag
解决方法:
解决了.
问题是我有模数和指数,所以我必须这样做:
String pubKey = "tihq/Gk3OUs5NzP+XTRKXBwSxHtB0TWn0RREcpXEtp316tyD9DzKaIbdKexb/mRr"; //64 caratteri
String exponent = "AQAB";
byte[] keyBytes = Base64.decode(pubKey,Base64.DEFAULT);
byte[] exponentByte = Base64.decode(exponent,Base64.DEFAULT);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(keyBytes), new BigInteger(exponentByte));
RSAPublicKey publicKey = (RSAPublicKey) keyFactory.generatePublic(pubKeySpec);
标签:android,java,rsa,public-key 来源: https://codeday.me/bug/20191010/1883799.html