diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/digests/MD5Digest.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/digests/MD5Digest.java | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/digests/MD5Digest.java b/core/src/main/java/org/bouncycastle/crypto/digests/MD5Digest.java deleted file mode 100644 index ff9cedf0..00000000 --- a/core/src/main/java/org/bouncycastle/crypto/digests/MD5Digest.java +++ /dev/null @@ -1,323 +0,0 @@ -package org.bouncycastle.crypto.digests; - - -import org.bouncycastle.util.Memoable; - -/** - * implementation of MD5 as outlined in "Handbook of Applied Cryptography", pages 346 - 347. - */ -public class MD5Digest - extends GeneralDigest -{ - private static final int DIGEST_LENGTH = 16; - - private int H1, H2, H3, H4; // IV's - - private int[] X = new int[16]; - private int xOff; - - /** - * Standard constructor - */ - public MD5Digest() - { - reset(); - } - - /** - * Copy constructor. This will copy the state of the provided - * message digest. - */ - public MD5Digest(MD5Digest t) - { - super(t); - - copyIn(t); - } - - private void copyIn(MD5Digest t) - { - super.copyIn(t); - - H1 = t.H1; - H2 = t.H2; - H3 = t.H3; - H4 = t.H4; - - System.arraycopy(t.X, 0, X, 0, t.X.length); - xOff = t.xOff; - } - - public String getAlgorithmName() - { - return "MD5"; - } - - public int getDigestSize() - { - return DIGEST_LENGTH; - } - - protected void processWord( - byte[] in, - int inOff) - { - X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8) - | ((in[inOff + 2] & 0xff) << 16) | ((in[inOff + 3] & 0xff) << 24); - - if (xOff == 16) - { - processBlock(); - } - } - - protected void processLength( - long bitLength) - { - if (xOff > 14) - { - processBlock(); - } - - X[14] = (int)(bitLength & 0xffffffff); - X[15] = (int)(bitLength >>> 32); - } - - private void unpackWord( - int word, - byte[] out, - int outOff) - { - out[outOff] = (byte)word; - out[outOff + 1] = (byte)(word >>> 8); - out[outOff + 2] = (byte)(word >>> 16); - out[outOff + 3] = (byte)(word >>> 24); - } - - public int doFinal( - byte[] out, - int outOff) - { - finish(); - - unpackWord(H1, out, outOff); - unpackWord(H2, out, outOff + 4); - unpackWord(H3, out, outOff + 8); - unpackWord(H4, out, outOff + 12); - - reset(); - - return DIGEST_LENGTH; - } - - /** - * reset the chaining variables to the IV values. - */ - public void reset() - { - super.reset(); - - H1 = 0x67452301; - H2 = 0xefcdab89; - H3 = 0x98badcfe; - H4 = 0x10325476; - - xOff = 0; - - for (int i = 0; i != X.length; i++) - { - X[i] = 0; - } - } - - // - // round 1 left rotates - // - private static final int S11 = 7; - private static final int S12 = 12; - private static final int S13 = 17; - private static final int S14 = 22; - - // - // round 2 left rotates - // - private static final int S21 = 5; - private static final int S22 = 9; - private static final int S23 = 14; - private static final int S24 = 20; - - // - // round 3 left rotates - // - private static final int S31 = 4; - private static final int S32 = 11; - private static final int S33 = 16; - private static final int S34 = 23; - - // - // round 4 left rotates - // - private static final int S41 = 6; - private static final int S42 = 10; - private static final int S43 = 15; - private static final int S44 = 21; - - /* - * rotate int x left n bits. - */ - private int rotateLeft( - int x, - int n) - { - return (x << n) | (x >>> (32 - n)); - } - - /* - * F, G, H and I are the basic MD5 functions. - */ - private int F( - int u, - int v, - int w) - { - return (u & v) | (~u & w); - } - - private int G( - int u, - int v, - int w) - { - return (u & w) | (v & ~w); - } - - private int H( - int u, - int v, - int w) - { - return u ^ v ^ w; - } - - private int K( - int u, - int v, - int w) - { - return v ^ (u | ~w); - } - - protected void processBlock() - { - int a = H1; - int b = H2; - int c = H3; - int d = H4; - - // - // Round 1 - F cycle, 16 times. - // - a = rotateLeft(a + F(b, c, d) + X[ 0] + 0xd76aa478, S11) + b; - d = rotateLeft(d + F(a, b, c) + X[ 1] + 0xe8c7b756, S12) + a; - c = rotateLeft(c + F(d, a, b) + X[ 2] + 0x242070db, S13) + d; - b = rotateLeft(b + F(c, d, a) + X[ 3] + 0xc1bdceee, S14) + c; - a = rotateLeft(a + F(b, c, d) + X[ 4] + 0xf57c0faf, S11) + b; - d = rotateLeft(d + F(a, b, c) + X[ 5] + 0x4787c62a, S12) + a; - c = rotateLeft(c + F(d, a, b) + X[ 6] + 0xa8304613, S13) + d; - b = rotateLeft(b + F(c, d, a) + X[ 7] + 0xfd469501, S14) + c; - a = rotateLeft(a + F(b, c, d) + X[ 8] + 0x698098d8, S11) + b; - d = rotateLeft(d + F(a, b, c) + X[ 9] + 0x8b44f7af, S12) + a; - c = rotateLeft(c + F(d, a, b) + X[10] + 0xffff5bb1, S13) + d; - b = rotateLeft(b + F(c, d, a) + X[11] + 0x895cd7be, S14) + c; - a = rotateLeft(a + F(b, c, d) + X[12] + 0x6b901122, S11) + b; - d = rotateLeft(d + F(a, b, c) + X[13] + 0xfd987193, S12) + a; - c = rotateLeft(c + F(d, a, b) + X[14] + 0xa679438e, S13) + d; - b = rotateLeft(b + F(c, d, a) + X[15] + 0x49b40821, S14) + c; - - // - // Round 2 - G cycle, 16 times. - // - a = rotateLeft(a + G(b, c, d) + X[ 1] + 0xf61e2562, S21) + b; - d = rotateLeft(d + G(a, b, c) + X[ 6] + 0xc040b340, S22) + a; - c = rotateLeft(c + G(d, a, b) + X[11] + 0x265e5a51, S23) + d; - b = rotateLeft(b + G(c, d, a) + X[ 0] + 0xe9b6c7aa, S24) + c; - a = rotateLeft(a + G(b, c, d) + X[ 5] + 0xd62f105d, S21) + b; - d = rotateLeft(d + G(a, b, c) + X[10] + 0x02441453, S22) + a; - c = rotateLeft(c + G(d, a, b) + X[15] + 0xd8a1e681, S23) + d; - b = rotateLeft(b + G(c, d, a) + X[ 4] + 0xe7d3fbc8, S24) + c; - a = rotateLeft(a + G(b, c, d) + X[ 9] + 0x21e1cde6, S21) + b; - d = rotateLeft(d + G(a, b, c) + X[14] + 0xc33707d6, S22) + a; - c = rotateLeft(c + G(d, a, b) + X[ 3] + 0xf4d50d87, S23) + d; - b = rotateLeft(b + G(c, d, a) + X[ 8] + 0x455a14ed, S24) + c; - a = rotateLeft(a + G(b, c, d) + X[13] + 0xa9e3e905, S21) + b; - d = rotateLeft(d + G(a, b, c) + X[ 2] + 0xfcefa3f8, S22) + a; - c = rotateLeft(c + G(d, a, b) + X[ 7] + 0x676f02d9, S23) + d; - b = rotateLeft(b + G(c, d, a) + X[12] + 0x8d2a4c8a, S24) + c; - - // - // Round 3 - H cycle, 16 times. - // - a = rotateLeft(a + H(b, c, d) + X[ 5] + 0xfffa3942, S31) + b; - d = rotateLeft(d + H(a, b, c) + X[ 8] + 0x8771f681, S32) + a; - c = rotateLeft(c + H(d, a, b) + X[11] + 0x6d9d6122, S33) + d; - b = rotateLeft(b + H(c, d, a) + X[14] + 0xfde5380c, S34) + c; - a = rotateLeft(a + H(b, c, d) + X[ 1] + 0xa4beea44, S31) + b; - d = rotateLeft(d + H(a, b, c) + X[ 4] + 0x4bdecfa9, S32) + a; - c = rotateLeft(c + H(d, a, b) + X[ 7] + 0xf6bb4b60, S33) + d; - b = rotateLeft(b + H(c, d, a) + X[10] + 0xbebfbc70, S34) + c; - a = rotateLeft(a + H(b, c, d) + X[13] + 0x289b7ec6, S31) + b; - d = rotateLeft(d + H(a, b, c) + X[ 0] + 0xeaa127fa, S32) + a; - c = rotateLeft(c + H(d, a, b) + X[ 3] + 0xd4ef3085, S33) + d; - b = rotateLeft(b + H(c, d, a) + X[ 6] + 0x04881d05, S34) + c; - a = rotateLeft(a + H(b, c, d) + X[ 9] + 0xd9d4d039, S31) + b; - d = rotateLeft(d + H(a, b, c) + X[12] + 0xe6db99e5, S32) + a; - c = rotateLeft(c + H(d, a, b) + X[15] + 0x1fa27cf8, S33) + d; - b = rotateLeft(b + H(c, d, a) + X[ 2] + 0xc4ac5665, S34) + c; - - // - // Round 4 - K cycle, 16 times. - // - a = rotateLeft(a + K(b, c, d) + X[ 0] + 0xf4292244, S41) + b; - d = rotateLeft(d + K(a, b, c) + X[ 7] + 0x432aff97, S42) + a; - c = rotateLeft(c + K(d, a, b) + X[14] + 0xab9423a7, S43) + d; - b = rotateLeft(b + K(c, d, a) + X[ 5] + 0xfc93a039, S44) + c; - a = rotateLeft(a + K(b, c, d) + X[12] + 0x655b59c3, S41) + b; - d = rotateLeft(d + K(a, b, c) + X[ 3] + 0x8f0ccc92, S42) + a; - c = rotateLeft(c + K(d, a, b) + X[10] + 0xffeff47d, S43) + d; - b = rotateLeft(b + K(c, d, a) + X[ 1] + 0x85845dd1, S44) + c; - a = rotateLeft(a + K(b, c, d) + X[ 8] + 0x6fa87e4f, S41) + b; - d = rotateLeft(d + K(a, b, c) + X[15] + 0xfe2ce6e0, S42) + a; - c = rotateLeft(c + K(d, a, b) + X[ 6] + 0xa3014314, S43) + d; - b = rotateLeft(b + K(c, d, a) + X[13] + 0x4e0811a1, S44) + c; - a = rotateLeft(a + K(b, c, d) + X[ 4] + 0xf7537e82, S41) + b; - d = rotateLeft(d + K(a, b, c) + X[11] + 0xbd3af235, S42) + a; - c = rotateLeft(c + K(d, a, b) + X[ 2] + 0x2ad7d2bb, S43) + d; - b = rotateLeft(b + K(c, d, a) + X[ 9] + 0xeb86d391, S44) + c; - - H1 += a; - H2 += b; - H3 += c; - H4 += d; - - // - // reset the offset and clean out the word buffer. - // - xOff = 0; - for (int i = 0; i != X.length; i++) - { - X[i] = 0; - } - } - - public Memoable copy() - { - return new MD5Digest(this); - } - - public void reset(Memoable other) - { - MD5Digest d = (MD5Digest)other; - - copyIn(d); - } -} |