[feat] - SSI - TP1

2026-05-13 17:11:53 +00:00 · 2024-10-25 10:05:41 +02:00
parent 77462dd6d2
commit a2e042a9a3
40 changed files with 361 additions and 0 deletions
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle or the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */ 
+
+
+ import java.io.*;
+ import java.security.*;
+ 
+ class GenSig {
+ 
+     public static void main(String[] args) {
+ 
+         /* Generate a DSA signature */
+ 
+         if (args.length != 1) {
+             System.out.println("Usage: GenSig nameOfFileToSign");
+             }
+         else try{
+ 
+             /* Generate a key pair */
+ 
+             KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA", "SUN");
+             SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
+ 
+             keyGen.initialize(1024, random);
+ 
+             KeyPair pair = keyGen.generateKeyPair();
+             PrivateKey priv = pair.getPrivate();
+             PublicKey pub = pair.getPublic();
+ 
+ 
+             /* Create a Signature object and initialize it with the private key */
+ 
+             Signature dsa = Signature.getInstance("SHA1withDSA", "SUN"); 
+ 
+             dsa.initSign(priv);
+ 
+             /* Update and sign the data */
+ 
+             FileInputStream fis = new FileInputStream(args[0]);
+             BufferedInputStream bufin = new BufferedInputStream(fis);
+             byte[] buffer = new byte[1024];
+             int len;
+             while (bufin.available() != 0) {
+                 len = bufin.read(buffer);
+                 dsa.update(buffer, 0, len);
+                 };
+ 
+             bufin.close();
+ 
+             /* Now that all the data to be signed has been read in, 
+                     generate a signature for it */
+ 
+             byte[] realSig = dsa.sign();
+ 
+         
+             /* Save the signature in a file */
+             FileOutputStream sigfos = new FileOutputStream("sig");
+             sigfos.write(realSig);
+ 
+             sigfos.close();
+ 
+ 
+             /* Save the public key in a file */
+             byte[] key = pub.getEncoded();
+             FileOutputStream keyfos = new FileOutputStream("suepk");
+             keyfos.write(key);
+ 
+             keyfos.close();
+ 
+         } catch (Exception e) {
+             System.err.println("Caught exception " + e.toString());
+         }
+ 
+     };
+ 
+ }
+ 
+