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wang2bo2/HashUtils.java

Last active August 29, 2015 14:00
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Revisions

  1. wang2bo2 revised this gist May 3, 2014. 1 changed file with 6 additions and 12 deletions.
    18 changes: 6 additions & 12 deletions HashUtils.java
    View file
    Original file line number Diff line number Diff line change
    @@ -14,20 +14,14 @@
    * @author bowang
    *
    */
    final class HashUtils {
    public final class HashUtils {

    private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";

    private HashUtils() {
    throw new AssertionError();
    }

    /**
    * Convert the byte to hex format method 1
    *
    * @param raw
    * @return
    */
    static final String hexString(byte[] raw) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < raw.length; i++) {
    @@ -37,7 +31,7 @@ static final String hexString(byte[] raw) {
    return sb.toString();
    }

    static final String md5(String raw) {
    public static final String md5(String raw) {
    try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(raw.getBytes());
    @@ -47,11 +41,11 @@ static final String md5(String raw) {
    return null;
    }

    static final String sha1(String raw) {
    public static final String sha1(String raw) {
    return sha1(raw.getBytes());
    }

    static final String sha1(byte[] bytes) {
    public static final String sha1(byte[] bytes) {
    try {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    md.update(bytes);
    @@ -61,7 +55,7 @@ static final String sha1(byte[] bytes) {
    return null;
    }

    static final String sha1Base64(byte[] bytes) {
    public static final String sha1Base64(byte[] bytes) {
    try {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    md.update(bytes);
    @@ -82,7 +76,7 @@ static final String sha1Base64(byte[] bytes) {
    * @throws java.security.SignatureException
    * when signature generation fails
    */
    static String hmacsha1(String raw, String key)
    public static String hmacsha1(String raw, String key)
    throws SignatureException {
    try {
    // get an hmac_sha1 key from the raw key bytes
  2. wang2bo2 created this gist May 3, 2014.
    106 changes: 106 additions & 0 deletions HashUtils.java
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,106 @@
    package com.calciumion.util;

    import android.util.Base64;

    import java.security.MessageDigest;
    import java.security.SignatureException;

    import javax.crypto.Mac;
    import javax.crypto.spec.SecretKeySpec;

    /**
    * Commonly used hash functions
    *
    * @author bowang
    *
    */
    final class HashUtils {

    private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";

    private HashUtils() {
    throw new AssertionError();
    }

    /**
    * Convert the byte to hex format method 1
    *
    * @param raw
    * @return
    */
    static final String hexString(byte[] raw) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < raw.length; i++) {
    sb.append(Integer.toString((raw[i] & 0xff) + 0x100, 16)
    .substring(1));
    }
    return sb.toString();
    }

    static final String md5(String raw) {
    try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(raw.getBytes());
    return hexString(md.digest());
    } catch (Exception e) {
    }
    return null;
    }

    static final String sha1(String raw) {
    return sha1(raw.getBytes());
    }

    static final String sha1(byte[] bytes) {
    try {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    md.update(bytes);
    return hexString(md.digest());
    } catch (Exception e) {
    }
    return null;
    }

    static final String sha1Base64(byte[] bytes) {
    try {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    md.update(bytes);
    return Base64.encodeToString(md.digest(), Base64.DEFAULT);
    } catch (Exception e) {
    }
    return null;
    }

    /**
    * Computes RFC 2104-compliant HMAC signature.
    *
    * @param raw
    * The data to be signed.
    * @param key
    * The signing key.
    * @return The Base64-encoded RFC 2104-compliant HMAC signature.
    * @throws java.security.SignatureException
    * when signature generation fails
    */
    static String hmacsha1(String raw, String key)
    throws SignatureException {
    try {
    // get an hmac_sha1 key from the raw key bytes
    SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(),
    HMAC_SHA1_ALGORITHM);

    // get an hmac_sha1 Mac instance and initialize with the signing key
    Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
    mac.init(signingKey);

    // compute the hmac on input data bytes
    byte[] rawHmac = mac.doFinal(raw.getBytes());
    return hexString(rawHmac);
    } catch (Exception e) {
    throw new SignatureException("Failed to generate HMAC : "
    + e.getMessage());
    }

    }

    }