Welcome to mirror list, hosted at ThFree Co, Russian Federation.

gitlab.com/quite/humla-spongycastle.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java
diff options
context:
space:
mode:
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java')
-rw-r--r--core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java201
1 files changed, 0 insertions, 201 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java b/core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java
deleted file mode 100644
index b59205de..00000000
--- a/core/src/main/java/org/bouncycastle/crypto/engines/Shacal2Engine.java
+++ /dev/null
@@ -1,201 +0,0 @@
-package org.bouncycastle.crypto.engines;
-
-import org.bouncycastle.crypto.BlockCipher;
-import org.bouncycastle.crypto.CipherParameters;
-import org.bouncycastle.crypto.DataLengthException;
-import org.bouncycastle.crypto.OutputLengthException;
-import org.bouncycastle.crypto.params.KeyParameter;
-
-/**
- * Block cipher Shacal2, designed by Helena Handschuh and David Naccache,
- * based on hash function SHA-256,
- * using SHA-256-Initialization-Values as data and SHA-256-Data as key.
- * <p>
- * A description of Shacal can be found at:
- * http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.3.4066
- * Best known cryptanalytic (Wikipedia 11.2013):
- * Related-key rectangle attack on 44-rounds (Jiqiang Lu, Jongsung Kim).
- * Comments are related to SHA-256-Naming as described in FIPS PUB 180-2
- * </p>
- */
-public class Shacal2Engine
- implements BlockCipher
-{
- private final static int[] K = { // SHA-256-Constants
- 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
- 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
- 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
- 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
- 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
- 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
- 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
- 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
- };
-
- private static final int BLOCK_SIZE = 32;
- private boolean forEncryption = false;
- private static final int ROUNDS = 64;
-
- private int[] workingKey = null; // expanded key: corresponds to the message block W in FIPS PUB 180-2
-
- public Shacal2Engine()
- {
- }
-
- public void reset()
- {
- }
-
- public String getAlgorithmName()
- {
- return "Shacal2";
- }
-
- public int getBlockSize()
- {
- return BLOCK_SIZE;
- }
-
- public void init(boolean _forEncryption, CipherParameters params)
- throws IllegalArgumentException
- {
- if (!(params instanceof KeyParameter))
- {
- throw new IllegalArgumentException("only simple KeyParameter expected.");
- }
- this.forEncryption = _forEncryption;
- workingKey = new int[64];
- setKey( ((KeyParameter)params).getKey() );
- }
-
- public void setKey(byte[] kb)
- {
- if (kb.length == 0 || kb.length > 64 || kb.length < 16 || kb.length % 8 != 0)
- {
- throw new IllegalArgumentException("Shacal2-key must be 16 - 64 bytes and multiple of 8");
- }
-
- bytes2ints(kb, workingKey, 0, 0);
-
- for ( int i = 16; i < 64; i++)
- { // Key-Expansion, implicitly Zero-Padding for 16 > i > kb.length/4
- workingKey[i] =
- ( (workingKey[i-2] >>> 17 | workingKey[i-2] << -17) // corresponds to ROTL n(x) of FIPS PUB 180-2
- ^ (workingKey[i-2] >>> 19 | workingKey[i-2] << -19)
- ^ (workingKey[i-2] >>> 10) ) // corresponds to sigma1(x)-Function of FIPS PUB 180-2
- + workingKey[i-7]
- + ( (workingKey[i-15] >>> 7 | workingKey[i-15] << -7)
- ^ (workingKey[i-15] >>> 18 | workingKey[i-15] << -18)
- ^ (workingKey[i-15] >>> 3) ) // corresponds to sigma0(x)-Function of FIPS PUB 180-2
- + workingKey[i-16];
- }
- }
-
- public void encryptBlock(byte[] in, int inOffset, byte[] out, int outOffset)
- {
- int[] block = new int[BLOCK_SIZE / 4];// corresponds to working variables a,b,c,d,e,f,g,h of FIPS PUB 180-2
- bytes2ints(in, block, inOffset, 0);
-
- for (int i = 0; i < ROUNDS; i++)
- {
- int tmp =
- (((block[4] >>> 6) | (block[4] << -6))
- ^ ((block[4] >>> 11) | (block[4] << -11))
- ^ ((block[4] >>> 25) | (block[4] << -25)))
- + ((block[4] & block[5]) ^ ((~block[4]) & block[6]))
- + block[7] + K[i] + workingKey[i]; // corresponds to T1 of FIPS PUB 180-2
- block[7] = block[6];
- block[6] = block[5];
- block[5] = block[4];
- block[4] = block[3] + tmp;
- block[3] = block[2];
- block[2] = block[1];
- block[1] = block[0];
- block[0] = tmp
- + (((block[0] >>> 2) | (block[0] << -2))
- ^ ((block[0] >>> 13) | (block[0] << -13))
- ^ ((block[0] >>> 22) | (block[0] << -22)))
- + ((block[0] & block[2]) ^ (block[0] & block[3]) ^ (block[2] & block[3]));
- //corresponds to T2 of FIPS PUB 180-2, block[1] and block[2] replaced
- }
- ints2bytes(block, out, outOffset);
- }
-
- public void decryptBlock(byte[] in, int inOffset, byte[] out, int outOffset)
- {
- int[] block = new int[BLOCK_SIZE / 4];
- bytes2ints(in, block, inOffset, 0);
- for (int i = ROUNDS - 1; i >-1; i--)
- {
- int tmp = block[0] - (((block[1] >>> 2) | (block[1] << -2))
- ^ ((block[1] >>> 13) | (block[1] << -13))
- ^ ((block[1] >>> 22) | (block[1] << -22)))
- - ((block[1] & block[2]) ^ (block[1] & block[3]) ^ (block[2] & block[3])); // T2
- block[0] = block[1];
- block[1] = block[2];
- block[2] = block[3];
- block[3] = block[4] - tmp;
- block[4] = block[5];
- block[5] = block[6];
- block[6] = block[7];
- block[7] = tmp - K[i] - workingKey[i]
- - (((block[4] >>> 6) | (block[4] << -6))
- ^ ((block[4] >>> 11) | (block[4] << -11))
- ^ ((block[4] >>> 25) | (block[4] << -25)))
- - ((block[4] & block[5]) ^ ((~block[4]) & block[6])); // T1
- }
- ints2bytes(block, out, outOffset);
- }
-
- public int processBlock(byte[] in, int inOffset, byte[] out, int outOffset)
- throws DataLengthException, IllegalStateException
- {
- if (workingKey == null)
- {
- throw new IllegalStateException("Shacal2 not initialised");
- }
-
- if ((inOffset + BLOCK_SIZE) > in.length)
- {
- throw new DataLengthException("input buffer too short");
- }
-
- if ((outOffset + BLOCK_SIZE) > out.length)
- {
- throw new OutputLengthException("output buffer too short");
- }
-
- if (forEncryption)
- {
- encryptBlock(in, inOffset, out, outOffset);
- }
- else
- {
- decryptBlock(in, inOffset, out, outOffset);
- }
-
- return BLOCK_SIZE;
- }
-
- private void bytes2ints(byte[] bytes, int[] block, int bytesPos, int blockPos)
- {
- for (int i = blockPos; i < bytes.length / 4; i++)
- {
- block[i] = ((bytes[bytesPos++] & 0xFF) << 24)
- | ((bytes[bytesPos++] & 0xFF) << 16)
- | ((bytes[bytesPos++] & 0xFF) << 8)
- | (bytes[bytesPos++] & 0xFF);
- }
- }
-
- private void ints2bytes(int[] block, byte[] out, int pos)
- {
- for (int i = 0; i < block.length; i++)
- {
- out[pos++] = (byte)(block[i] >>> 24);
- out[pos++] = (byte)(block[i] >>> 16);
- out[pos++] = (byte)(block[i] >>> 8);
- out[pos++] = (byte)block[i];
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 08:46:52 +0300