init

src/main/java/com/senmesh/sdk/ssb/util/SsbRsaUtils.java

@@ -0,0 +1,54 @@
+package com.senmesh.sdk.ssb.util;
+
+import org.apache.commons.codec.binary.Base64;
+
+import javax.crypto.Cipher;
+import java.security.KeyFactory;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
+import java.security.spec.X509EncodedKeySpec;
+
+
+public class SsbRsaUtils {
+
+  public static String encryptByPublicKey(String publicKeyText, String text) throws Exception {
+    X509EncodedKeySpec x509EncodedKeySpec2 =
+        new X509EncodedKeySpec(Base64.decodeBase64(publicKeyText));
+    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+    PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec2);
+    Cipher cipher = Cipher.getInstance("RSA");
+    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
+    byte[] result = cipher.doFinal(text.getBytes());
+    return Base64.encodeBase64String(result);
+  }
+
+  public static String encryptMd5(String plainText) {
+    String re_md5 = new String();
+    try {
+      MessageDigest md = MessageDigest.getInstance("MD5");
+      md.update(plainText.getBytes());
+      byte b[] = md.digest();
+
+      int i;
+
+      StringBuffer buf = new StringBuffer("");
+      for (int offset = 0; offset < b.length; offset++) {
+        i = b[offset];
+        if (i < 0)
+          i += 256;
+        if (i < 16)
+          buf.append("0");
+        buf.append(Integer.toHexString(i));
+      }
+
+      re_md5 = buf.toString();
+
+    } catch (NoSuchAlgorithmException e) {
+      e.printStackTrace();
+    }
+    return re_md5;
+  }
+
+
+}