SHA and sha of message digest algorithm for Information Encryption

SHA and sha of message digest algorithm for Information Encryption

SHA is an implementation method of the message digest algorithm. The implementation of MD2 \ 4 \ 5 has been summarized earlier. Next, we will summarize the implementation of SHA.

Jdk Implementation of SHA:

Private static void SHA_JDK () {try {MessageDigest digest = MessageDigest. getInstance ("SHA"); // we can get different message digest keys digest through SHA \ SHA-1 \ SHA-384 \ SHA-256 \ SHA-512. update (src. getBytes (); System. out. println ("SHA:" + Hex. encodeHexString (digest. digest ();} catch (NoSuchAlgorithmException e) {e. printStackTrace ();}}

Sha bc implementation:

private static void SHA_BC(){        Digest digest = new SHA1Digest();        digest.update(src.getBytes(), 0, src.getBytes().length);        byte[] shaByte = new byte[digest.getDigestSize()];        digest.doFinal(shaByte, 0);        System.out.println("shaByte : "+Hex.encodeHexString(shaByte));    }

JAVA jdk does not provide implementation for shares'. The following is a method implemented using BC:

private static void SHA224_BC(){        Digest digest = new SHA224Digest();        digest.update(src.getBytes(), 0, src.getBytes().length);        byte[] sha224Byte = new byte[digest.getDigestSize()];        digest.doFinal(sha224Byte, 0);        System.out.println("sha224Byte : "+Hex.encodeHexString(sha224Byte));    }

There is also a JDK-like Implementation Method for shares:

private static void SHA224_BC_JDK(){        Security.addProvider(new BouncyCastleProvider());        try {            MessageDigest digest = MessageDigest.getInstance("SHA-224");            digest.update(src.getBytes());            System.out.println("SHA224_BC_JDK ："+Hex.encodeHexString(digest.digest()));        } catch (NoSuchAlgorithmException e) {            e.printStackTrace();        }    }

Finally, we will briefly introduce the SHA implementation of CC:

private static void SHA_CC_Byte(){System.out.println("SHA_CC_Byte_SHA1 : "+DigestUtils.sha1Hex(src.getBytes()));System.out.println("SHA_CC_Byte_SHA256 : "+DigestUtils.sha256Hex(src.getBytes()));System.out.println("SHA_CC_Byte_SHA384 : "+DigestUtils.sha384Hex(src.getBytes()));System.out.println("SHA_CC_Byte_SHA512 : "+DigestUtils.sha512Hex(src.getBytes()));}private static void SHA_CC(){System.out.println("SHA_CC_SHA1 : "+DigestUtils.sha1Hex(src));System.out.println("SHA_CC_SHA256 : "+DigestUtils.sha256Hex(src));System.out.println("SHA_CC_SHA384 : "+DigestUtils.sha384Hex(src));System.out.println("SHA_CC_SHA512 : "+DigestUtils.sha512Hex(src));}

The SHA implementation is summarized here.