LongDigest.java
资源名称:security.rar [点击查看]
上传用户:lior1029
上传日期:2013-05-07
资源大小:209k
文件大小:8k
源码类别:
CA认证
开发平台:
Java
- package org.bouncycastle.crypto.digests;
- import org.bouncycastle.crypto.Digest;
- /**
- * Base class for SHA-384 and SHA-512.
- */
- public abstract class LongDigest
- implements Digest
- {
- private byte[] xBuf;
- private int xBufOff;
- private long byteCount1;
- private long byteCount2;
- protected long H1, H2, H3, H4, H5, H6, H7, H8;
- private long[] W = new long[80];
- private int wOff;
- /**
- * Constructor for variable length word
- */
- protected LongDigest()
- {
- xBuf = new byte[8];
- xBufOff = 0;
- reset();
- }
- /**
- * Copy constructor. We are using copy constructors in place
- * of the Object.clone() interface as this interface is not
- * supported by J2ME.
- */
- protected LongDigest(LongDigest t)
- {
- xBuf = new byte[t.xBuf.length];
- System.arraycopy(t.xBuf, 0, xBuf, 0, t.xBuf.length);
- xBufOff = t.xBufOff;
- byteCount1 = t.byteCount1;
- byteCount2 = t.byteCount2;
- H1 = t.H1;
- H2 = t.H2;
- H3 = t.H3;
- H4 = t.H4;
- H5 = t.H5;
- H6 = t.H6;
- H7 = t.H7;
- H8 = t.H8;
- System.arraycopy(t.W, 0, W, 0, t.W.length);
- wOff = t.wOff;
- }
- public void update(
- byte in)
- {
- xBuf[xBufOff++] = in;
- if (xBufOff == xBuf.length)
- {
- processWord(xBuf, 0);
- xBufOff = 0;
- }
- byteCount1++;
- }
- public void update(
- byte[] in,
- int inOff,
- int len)
- {
- //
- // fill the current word
- //
- while ((xBufOff != 0) && (len > 0))
- {
- update(in[inOff]);
- inOff++;
- len--;
- }
- //
- // process whole words.
- //
- while (len > xBuf.length)
- {
- processWord(in, inOff);
- inOff += xBuf.length;
- len -= xBuf.length;
- byteCount1 += xBuf.length;
- }
- //
- // load in the remainder.
- //
- while (len > 0)
- {
- update(in[inOff]);
- inOff++;
- len--;
- }
- }
- public void finish()
- {
- adjustByteCounts();
- long lowBitLength = byteCount1 << 3;
- long hiBitLength = byteCount2;
- //
- // add the pad bytes.
- //
- update((byte)128);
- while (xBufOff != 0)
- {
- update((byte)0);
- }
- processLength(lowBitLength, hiBitLength);
- processBlock();
- }
- public void reset()
- {
- byteCount1 = 0;
- byteCount2 = 0;
- xBufOff = 0;
- for ( int i = 0; i < xBuf.length; i++ ) {
- xBuf[i] = 0;
- }
- wOff = 0;
- for (int i = 0; i != W.length; i++)
- {
- W[i] = 0;
- }
- }
- protected void processWord(
- byte[] in,
- int inOff)
- {
- W[wOff++] = ((long)(in[inOff] & 0xff) << 56)
- | ((long)(in[inOff + 1] & 0xff) << 48)
- | ((long)(in[inOff + 2] & 0xff) << 40)
- | ((long)(in[inOff + 3] & 0xff) << 32)
- | ((long)(in[inOff + 4] & 0xff) << 24)
- | ((long)(in[inOff + 5] & 0xff) << 16)
- | ((long)(in[inOff + 6] & 0xff) << 8)
- | ((long)(in[inOff + 7] & 0xff));
- if (wOff == 16)
- {
- processBlock();
- }
- }
- protected void unpackWord(
- long word,
- byte[] out,
- int outOff)
- {
- out[outOff] = (byte)(word >>> 56);
- out[outOff + 1] = (byte)(word >>> 48);
- out[outOff + 2] = (byte)(word >>> 40);
- out[outOff + 3] = (byte)(word >>> 32);
- out[outOff + 4] = (byte)(word >>> 24);
- out[outOff + 5] = (byte)(word >>> 16);
- out[outOff + 6] = (byte)(word >>> 8);
- out[outOff + 7] = (byte)word;
- }
- /**
- * adjust the byte counts so that byteCount2 represents the
- * upper long (less 3 bits) word of the byte count.
- */
- private void adjustByteCounts()
- {
- if (byteCount1 > 0x1fffffffffffffffL)
- {
- byteCount2 += (byteCount1 >>> 61);
- byteCount1 &= 0x1fffffffffffffffL;
- }
- }
- protected void processLength(
- long lowW,
- long hiW)
- {
- if (wOff > 14)
- {
- processBlock();
- }
- W[14] = hiW;
- W[15] = lowW;
- }
- protected void processBlock()
- {
- adjustByteCounts();
- //
- // expand 16 word block into 80 word blocks.
- //
- for (int t = 16; t <= 79; t++)
- {
- W[t] = Sigma1(W[t - 2]) + W[t - 7] + Sigma0(W[t - 15]) + W[t - 16];
- }
- //
- // set up working variables.
- //
- long a = H1;
- long b = H2;
- long c = H3;
- long d = H4;
- long e = H5;
- long f = H6;
- long g = H7;
- long h = H8;
- for (int t = 0; t <= 79; t++)
- {
- long T1, T2;
- T1 = h + Sum1(e) + Ch(e, f, g) + K[t] + W[t];
- T2 = Sum0(a) + Maj(a, b, c);
- h = g;
- g = f;
- f = e;
- e = d + T1;
- d = c;
- c = b;
- b = a;
- a = T1 + T2;
- }
- H1 += a;
- H2 += b;
- H3 += c;
- H4 += d;
- H5 += e;
- H6 += f;
- H7 += g;
- H8 += h;
- //
- // reset the offset and clean out the word buffer.
- //
- wOff = 0;
- for (int i = 0; i != W.length; i++)
- {
- W[i] = 0;
- }
- }
- private long rotateRight(
- long x,
- int n)
- {
- return (x >>> n) | (x << (64 - n));
- }
- /* SHA-384 and SHA-512 functions (as for SHA-256 but for longs) */
- private long Ch(
- long x,
- long y,
- long z)
- {
- return ((x & y) ^ ((~x) & z));
- }
- private long Maj(
- long x,
- long y,
- long z)
- {
- return ((x & y) ^ (x & z) ^ (y & z));
- }
- private long Sum0(
- long x)
- {
- return rotateRight(x, 28) ^ rotateRight(x, 34) ^ rotateRight(x, 39);
- }
- private long Sum1(
- long x)
- {
- return rotateRight(x, 14) ^ rotateRight(x, 18) ^ rotateRight(x, 41);
- }
- private long Sigma0(
- long x)
- {
- return rotateRight(x, 1) ^ rotateRight(x, 8) ^ (x >>> 7);
- }
- private long Sigma1(
- long x)
- {
- return rotateRight(x, 19) ^ rotateRight(x, 61) ^ (x >>> 6);
- }
- /* SHA-384 and SHA-512 Constants
- * (represent the first 64 bits of the fractional parts of the
- * cube roots of the first sixty-four prime numbers)
- */
- static final long K[] = {
- 0x428a2f98d728ae22L, 0x7137449123ef65cdL, 0xb5c0fbcfec4d3b2fL, 0xe9b5dba58189dbbcL,
- 0x3956c25bf348b538L, 0x59f111f1b605d019L, 0x923f82a4af194f9bL, 0xab1c5ed5da6d8118L,
- 0xd807aa98a3030242L, 0x12835b0145706fbeL, 0x243185be4ee4b28cL, 0x550c7dc3d5ffb4e2L,
- 0x72be5d74f27b896fL, 0x80deb1fe3b1696b1L, 0x9bdc06a725c71235L, 0xc19bf174cf692694L,
- 0xe49b69c19ef14ad2L, 0xefbe4786384f25e3L, 0x0fc19dc68b8cd5b5L, 0x240ca1cc77ac9c65L,
- 0x2de92c6f592b0275L, 0x4a7484aa6ea6e483L, 0x5cb0a9dcbd41fbd4L, 0x76f988da831153b5L,
- 0x983e5152ee66dfabL, 0xa831c66d2db43210L, 0xb00327c898fb213fL, 0xbf597fc7beef0ee4L,
- 0xc6e00bf33da88fc2L, 0xd5a79147930aa725L, 0x06ca6351e003826fL, 0x142929670a0e6e70L,
- 0x27b70a8546d22ffcL, 0x2e1b21385c26c926L, 0x4d2c6dfc5ac42aedL, 0x53380d139d95b3dfL,
- 0x650a73548baf63deL, 0x766a0abb3c77b2a8L, 0x81c2c92e47edaee6L, 0x92722c851482353bL,
- 0xa2bfe8a14cf10364L, 0xa81a664bbc423001L, 0xc24b8b70d0f89791L, 0xc76c51a30654be30L,
- 0xd192e819d6ef5218L, 0xd69906245565a910L, 0xf40e35855771202aL, 0x106aa07032bbd1b8L,
- 0x19a4c116b8d2d0c8L, 0x1e376c085141ab53L, 0x2748774cdf8eeb99L, 0x34b0bcb5e19b48a8L,
- 0x391c0cb3c5c95a63L, 0x4ed8aa4ae3418acbL, 0x5b9cca4f7763e373L, 0x682e6ff3d6b2b8a3L,
- 0x748f82ee5defb2fcL, 0x78a5636f43172f60L, 0x84c87814a1f0ab72L, 0x8cc702081a6439ecL,
- 0x90befffa23631e28L, 0xa4506cebde82bde9L, 0xbef9a3f7b2c67915L, 0xc67178f2e372532bL,
- 0xca273eceea26619cL, 0xd186b8c721c0c207L, 0xeada7dd6cde0eb1eL, 0xf57d4f7fee6ed178L,
- 0x06f067aa72176fbaL, 0x0a637dc5a2c898a6L, 0x113f9804bef90daeL, 0x1b710b35131c471bL,
- 0x28db77f523047d84L, 0x32caab7b40c72493L, 0x3c9ebe0a15c9bebcL, 0x431d67c49c100d4cL,
- 0x4cc5d4becb3e42b6L, 0x597f299cfc657e2aL, 0x5fcb6fab3ad6faecL, 0x6c44198c4a475817L
- };
- }