Java MessageDigest类代码示例

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Creates an Handshake object that is used to negotiate a
 * version 3 handshake with an SSL peer.
 *
 * @param host hostname of the peer
 * @param port port number of the peer
 * @param r    Record instance through which handshake
 *             will occur
 * @param tcs  trusted certificate store containing certificates
 *
 * @exception RuntimeException if SHA-1 or MD5 is not available
 */
Handshake(String host, int port, Record r, CertStore tcs) {
    trustManager = TrustManager.getTrustManager(); // SPOT specific
    
    peerHost = new String(host);
    peerPort = port;
    rec = r;
    certStore = tcs;
    sPrivKey = null;
    gotCertReq = 0;
    start = 0;
    cnt = 0;
    
    try {
        ourMD5 = MessageDigest.getInstance("MD5");
        ourSHA = MessageDigest.getInstance("SHA-1");
        rnd = SecureRandom.getInstance(SecureRandom.ALG_SECURE_RANDOM);
    } catch (NoSuchAlgorithmException e) {
        // should only happen, if digests are not included in the build
        throw new RuntimeException(e.getMessage());
    }
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Constructs an RSA signature object that uses MD5 as 
 * message digest algorithm.
 *
 * @exception RuntimeException if MD5 is not available
 */
public RsaMd5Sig() {
    try {
        rsaSig = new RSASig(PREFIX_MD5, MessageDigest.getInstance("MD5"));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Needed algorithm not available");
    }
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Constructs an RSA signature object that uses SHA1 as 
 * message digest algorithm.
 *
 * @exception RuntimeException if SHA-1 is not available
 */
public RsaShaSig() {
    try {
        rsaSig =
            new RSASig(PREFIX_SHA1, MessageDigest.getInstance("SHA-1"));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Needed algorithm not available");
    }
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Constructs an RSA signature object that uses the specified
 * signature algorithm.
 *
 * @param sigPrefix Prefix for the signature
 * @param messageDigest Message digest for the signature
 *
 * @exception NoSuchAlgorithmException if RSA is
 * not available in the caller's environment.  
 */
RSASig(byte[] sigPrefix, MessageDigest messageDigest)
        throws NoSuchAlgorithmException {
    prefix = sigPrefix;
    md = messageDigest;

    try {
        c = Cipher.getInstance("RSA");
    } catch (NoSuchPaddingException e) {
        // we used the default mode and padding this should not happen
        throw new NoSuchAlgorithmException();
    }
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/** Constructor for random data. */
   public PseudoRand() throws NoSuchAlgorithmException {
if (md != null) 
    return;

try {
    md = MessageDigest.getInstance("MD5");
} catch (Exception e) {
    throw new NoSuchAlgorithmException("Algorithm MD5 not available");
}
randomBytes = new byte[seed.length];
       timeTmp = new byte[8];
updateSeed();
   }
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
private void create(String algorithm, String hashAlg) throws NoSuchAlgorithmException {
   this.algorithm = algorithm;
       digest = MessageDigest.getInstance(hashAlg);
digestBuf = new byte[digest.getDigestLength()];
  }
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Constructs RecordEncoder object
 * 
 * @param dgst digest for MAC computation
 * @param secret MAC secret
 * @param padLen padding length
 * @param cphr cipher used for encoding
 * @param ver version of SSL/TLS
 */
RecordEncoder(MessageDigest dgst, byte[] secret, int padLen, Cipher cphr, byte ver) {
    macSecret = secret;
    digest = dgst;
    digestLength = digest.getDigestLength();
    padLength = padLen;
    cipher = cphr;
    version = ver;
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Constructs RecordDecoder object
 * 
 * @param dgst digest for MAC computation
 * @param secret MAC secret
 * @param padLen padding length
 * @param cphr cipher used for decoding
 * @param ver version of SSL/TLS
 */
RecordDecoder(MessageDigest dgst, byte[] secret, int padLen, Cipher cphr, byte ver) {
    macSecret = secret;
    digest = dgst;
    digestLength = digest.getDigestLength();
    padLength = padLen;
    cipher = cphr;
    version = ver;
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Get digest used for encoding 
 * @return encode digest
 */
MessageDigest getEncodeDigest() {
    return encodeDigest;
}
 

import com.sun.spot.security.MessageDigest; //导入依赖的package包/类
/**
 * Get digest used for decoding
 * @return decode digest
 */
MessageDigest getDecodeDigest() {
    return decodeDigest;
}