SHA 1ÕªÒªËã·¨Ô´Âë(java°æ)

public class SHA1 {
    private final int[] abcde = {
            0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0
        };
    // ÕªÒªÊý¾Ý´æ´¢Êý×é
    private int[] digestInt = new int[5];
    // ¼ÆËã¹ý³ÌÖеÄÁÙʱÊý¾Ý´æ´¢Êý×é
    private int[] tmpData = new int[80];
    // ¼ÆËãsha-1ÕªÒª
    private int process_input_bytes(byte[] bytedata) {
        // ³õÊÔ»¯³£Á¿
        System.arraycopy(abcde, 0, digestInt, 0, abcde.length);
        // ¸ñʽ»¯ÊäÈë×Ö½ÚÊý×飬²¹10¼°³¤¶ÈÊý¾Ý
        byte[] newbyte = byteArrayFormatData(bytedata);
        // »ñÈ¡Êý¾ÝÕªÒª¼ÆËãµÄÊý¾Ýµ¥Ôª¸öÊý
        int MCount = newbyte.length / 64;
        // Ñ­»·¶Ôÿ¸öÊý¾Ýµ¥Ôª½øÐÐÕªÒª¼ÆËã
        for (int pos = 0; pos < MCount; pos++) {
            // ½«Ã¿¸öµ¥ÔªµÄÊý¾Ýת»»³É16¸öÕûÐÍÊý¾Ý£¬²¢±£´æµ½tmpDataµÄÇ°16¸öÊý×éÔªËØÖÐ
            for (int j = 0; j < 16; j++) {
                tmpData[j] = byteArrayToInt(newbyte, (pos * 64) + (j * 4));
            }
            // ÕªÒª¼ÆË㺯Êý
            encrypt();
        }
        return 20;
    }
    // ¸ñʽ»¯ÊäÈë×Ö½