Android-Java RSA解密

概述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：StringpubKey="tihq/Gk3OUs5NzP+XTRKXBwSxHtB0TWn0RREcpXEtp316tyD9DzKaIbdKexb/mRr";byte[]keyBytes=Base64.decode(pubKey,Base64.DEFAULT);/estifiscorrect:okLog.d("responsekeyBytes",newStrin

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: okLog.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 caratteriString 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);

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