java publickey_数字证书中读取PublicKey
1. 讀取https簽發(fā)證書中的key
1) 在下面的代碼中,是實(shí)現(xiàn)讀取證書字符串來讀取key的,CERTIFICATE 就是一個(gè)證書的字符串, 而方法cf.generateCertificate() 接受的是一個(gè)InputStream 流,當(dāng)然這個(gè)地方也可以讀取一個(gè)文件 new FileInputSream("file path")即可!
public String getCertificateKey() {
CertificateFactory cf = null;
PublicKey publicKey = null;
try {
cf = CertificateFactory.getInstance("X.509");
//DataInputStream di = new DataInputStream("");
X509Certificate cert = (X509Certificate)cf.generateCertificate(new ByteArrayInputStream(CERTIFICATE.getBytes()));
publicKey = cert.getPublicKey();
} catch (Exception e) {
e.printStackTrace();
}
byte[] publicKeyString = Base64.encode(publicKey.getEncoded(), Base64.DEFAULT);
String publickey = new String(publicKeyString);
System.out.println("-----------------公鑰--------------------");
System.out.println(publickey);
System.out.println("-----------------公鑰--------------------");
return publickey;
}
2) 這里的 X509Certificate 文件是 import java.security.cert.X509Certificate; 包路徑下的,
publicString getCertificateKey() {
CertificateFactory cf = null;PublicKey publicKey = null;try{
cf = CertificateFactory.getInstance("X.509");//DataInputStream di = new DataInputStream("");X509Certificate cert = (X509Certificate)cf.generateCertificate(newByteArrayInputStream(CERTIFICATE.getBytes()));publicKey = cert.getPublicKey();} catch(Exception e) {
e.printStackTrace();}
byte[] publicKeyString = Base64.encode(publicKey.getEncoded(),Base64.DEFAULT);String publickey = newString(publicKeyString);System.out.println("-----------------公鑰--------------------");System.out.println(publickey);System.out.println("-----------------公鑰--------------------");returnpublickey;}
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