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-rw-r--r--java/SHA3.java969
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diff --git a/java/SHA3.java b/java/SHA3.java
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--- a/java/SHA3.java
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-/**
- * sha3sum – SHA-3 (Keccak) checksum calculator
- *
- * Copyright © 2013, 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-/**
- * SHA-3/Keccak hash algorithm implementation
- *
- * @author Mattias Andrée <a href="mailto:maandree@member.fsf.org">maandree@member.fsf.org</a>
- */
-public class SHA3
-{
- /**
- * Suffix the message when calculating the Keccak hash sum
- */
- public static final String KECCAK_SUFFIX = "";
-
- /**
- * Suffix the message when calculating the SHA-3 hash sum
- */
- public static final String SHA3_SUFFIX = "01";
-
- /**
- * Suffix the message when calculating the RawSHAKE hash sum
- */
- public static final String RawSHAKE_SUFFIX = "11";
-
- /**
- * Suffix the message when calculating the SHAKE hash sum
- */
- public static final String SHAKE_SUFFIX = "1111";
-
-
- /**
- * Round contants
- */
- private static final long[] RC = {
- 0x0000000000000001L, 0x0000000000008082L, 0x800000000000808AL, 0x8000000080008000L,
- 0x000000000000808BL, 0x0000000080000001L, 0x8000000080008081L, 0x8000000000008009L,
- 0x000000000000008AL, 0x0000000000000088L, 0x0000000080008009L, 0x000000008000000AL,
- 0x000000008000808BL, 0x800000000000008BL, 0x8000000000008089L, 0x8000000000008003L,
- 0x8000000000008002L, 0x8000000000000080L, 0x000000000000800AL, 0x800000008000000AL,
- 0x8000000080008081L, 0x8000000000008080L, 0x0000000080000001L, 0x8000000080008008L};
-
- /**
- * Keccak-f round temporary
- */
- private static long[] B = new long[25];
-
- /**
- * Keccak-f round temporary
- */
- private static long[] C = new long[5];
-
-
- /**
- * The bitrate
- */
- private static int r = 0;
-
- /**
- * The capacity
- */
- private static int c = 0;
-
- /**
- * The output size
- */
- private static int n = 0;
-
- /**
- * The state size
- */
- private static int b = 0;
-
- /**
- * The word size
- */
- private static int w = 0;
-
- /**
- * The word mask
- */
- private static long wmod = 0;
-
- /**
- * ℓ, the binary logarithm of the word size
- */
- private static int l = 0;
-
- /**
- * 12 + 2ℓ, the number of rounds
- */
- private static int nr = 0;
-
-
- /**
- * Message chunk that is being processes
- */
- private static byte[] message = null;
-
- /**
- * The current state
- */
- private static long[] S = null;
-
- /**
- * Left over water to fill the sponge with at next update
- */
- private static byte[] M = null;
-
- /**
- * Pointer for {@link #M}
- */
- private static int mptr = 0;
-
-
-
- /**
- * Hidden constructor
- */
- private SHA3()
- {
- // Inhibit instansiation
- }
-
-
-
- /**
- * Rotate a word
- *
- * @param x The value to rotate
- * @param n Rotation steps, may not be 0
- * @return The value rotated
- */
- private static long rotate(long x, int n)
- {
- long m;
- return ((x >>> (SHA3.w - (m = n % SHA3.w))) + (x << m)) & SHA3.wmod;
- }
-
-
- /**
- * Rotate a 64-bit word
- *
- * @param x The value to rotate
- * @param n Rotation steps, may not be 0
- * @return The value rotated
- */
- private static long rotate64(long x, int n)
- {
- return (x >>> (64 - n)) + (x << n);
- }
-
-
- /**
- * Binary logarithm
- *
- * @param x The value of which to calculate the binary logarithm
- * @return The binary logarithm
- */
- private static int lb(int x)
- {
- int rc = 0;
- if ((x & 0xFF00) != 0) { rc += 8; x >>= 8; }
- if ((x & 0x00F0) != 0) { rc += 4; x >>= 4; }
- if ((x & 0x000C) != 0) { rc += 2; x >>= 2; }
- if ((x & 0x0002) != 0) rc += 1;
- return rc;
- }
-
- /**
- * Perform one round of computation
- *
- * @param A The current state
- * @param rc Round constant
- */
- private static void keccakFRound(long[] A, long rc)
- {
- /* θ step (step 1 of 3) */
- for (int i = 0, j = 0; i < 5; i++, j += 5)
- SHA3.C[i] = (A[j] ^ A[j + 1]) ^ (A[j + 2] ^ A[j + 3]) ^ A[j + 4];
-
- long da, db, dc, dd, de;
-
- if (SHA3.w == 64)
- {
- /* ρ and π steps, with last two part of θ */
- SHA3.B[0] = A[ 0] ^ (da = SHA3.C[4] ^ SHA3.rotate64(SHA3.C[1], 1));
- SHA3.B[1] = SHA3.rotate64(A[15] ^ (dd = SHA3.C[2] ^ SHA3.rotate64(SHA3.C[4], 1)), 28);
- SHA3.B[2] = SHA3.rotate64(A[ 5] ^ (db = SHA3.C[0] ^ SHA3.rotate64(SHA3.C[2], 1)), 1);
- SHA3.B[3] = SHA3.rotate64(A[20] ^ (de = SHA3.C[3] ^ SHA3.rotate64(SHA3.C[0], 1)), 27);
- SHA3.B[4] = SHA3.rotate64(A[10] ^ (dc = SHA3.C[1] ^ SHA3.rotate64(SHA3.C[3], 1)), 62);
-
- SHA3.B[5] = SHA3.rotate64(A[ 6] ^ db, 44);
- SHA3.B[6] = SHA3.rotate64(A[21] ^ de, 20);
- SHA3.B[7] = SHA3.rotate64(A[11] ^ dc, 6);
- SHA3.B[8] = SHA3.rotate64(A[ 1] ^ da, 36);
- SHA3.B[9] = SHA3.rotate64(A[16] ^ dd, 55);
-
- SHA3.B[10] = SHA3.rotate64(A[12] ^ dc, 43);
- SHA3.B[11] = SHA3.rotate64(A[ 2] ^ da, 3);
- SHA3.B[12] = SHA3.rotate64(A[17] ^ dd, 25);
- SHA3.B[13] = SHA3.rotate64(A[ 7] ^ db, 10);
- SHA3.B[14] = SHA3.rotate64(A[22] ^ de, 39);
-
- SHA3.B[15] = SHA3.rotate64(A[18] ^ dd, 21);
- SHA3.B[16] = SHA3.rotate64(A[ 8] ^ db, 45);
- SHA3.B[17] = SHA3.rotate64(A[23] ^ de, 8);
- SHA3.B[18] = SHA3.rotate64(A[13] ^ dc, 15);
- SHA3.B[19] = SHA3.rotate64(A[ 3] ^ da, 41);
-
- SHA3.B[20] = SHA3.rotate64(A[24] ^ de, 14);
- SHA3.B[21] = SHA3.rotate64(A[14] ^ dc, 61);
- SHA3.B[22] = SHA3.rotate64(A[ 4] ^ da, 18);
- SHA3.B[23] = SHA3.rotate64(A[19] ^ dd, 56);
- SHA3.B[24] = SHA3.rotate64(A[ 9] ^ db, 2);
- }
- else
- {
- /* ρ and π steps, with last two part of θ */
- SHA3.B[0] = A[ 0] ^ (da = SHA3.C[4] ^ SHA3.rotate(SHA3.C[1], 1));
- SHA3.B[1] = SHA3.rotate(A[15] ^ (dd = SHA3.C[2] ^ SHA3.rotate(SHA3.C[4], 1)), 28);
- SHA3.B[2] = SHA3.rotate(A[ 5] ^ (db = SHA3.C[0] ^ SHA3.rotate(SHA3.C[2], 1)), 1);
- SHA3.B[3] = SHA3.rotate(A[20] ^ (de = SHA3.C[3] ^ SHA3.rotate(SHA3.C[0], 1)), 27);
- SHA3.B[4] = SHA3.rotate(A[10] ^ (dc = SHA3.C[1] ^ SHA3.rotate(SHA3.C[3], 1)), 62);
-
- SHA3.B[5] = SHA3.rotate(A[ 6] ^ db, 44);
- SHA3.B[6] = SHA3.rotate(A[21] ^ de, 20);
- SHA3.B[7] = SHA3.rotate(A[11] ^ dc, 6);
- SHA3.B[8] = SHA3.rotate(A[ 1] ^ da, 36);
- SHA3.B[9] = SHA3.rotate(A[16] ^ dd, 55);
-
- SHA3.B[10] = SHA3.rotate(A[12] ^ dc, 43);
- SHA3.B[11] = SHA3.rotate(A[ 2] ^ da, 3);
- SHA3.B[12] = SHA3.rotate(A[17] ^ dd, 25);
- SHA3.B[13] = SHA3.rotate(A[ 7] ^ db, 10);
- SHA3.B[14] = SHA3.rotate(A[22] ^ de, 39);
-
- SHA3.B[15] = SHA3.rotate(A[18] ^ dd, 21);
- SHA3.B[16] = SHA3.rotate(A[ 8] ^ db, 45);
- SHA3.B[17] = SHA3.rotate(A[23] ^ de, 8);
- SHA3.B[18] = SHA3.rotate(A[13] ^ dc, 15);
- SHA3.B[19] = SHA3.rotate(A[ 3] ^ da, 41);
-
- SHA3.B[20] = SHA3.rotate(A[24] ^ de, 14);
- SHA3.B[21] = SHA3.rotate(A[14] ^ dc, 61);
- SHA3.B[22] = SHA3.rotate(A[ 4] ^ da, 18);
- SHA3.B[23] = SHA3.rotate(A[19] ^ dd, 56);
- SHA3.B[24] = SHA3.rotate(A[ 9] ^ db, 2);
- }
-
- /* ξ step */
- for (int i = 0; i < 15; i++)
- A[i ] = SHA3.B[i ] ^ ((~(SHA3.B[i + 5])) & SHA3.B[i + 10]);
- for (int i = 0; i < 5; i++)
- {
- A[i + 15] = SHA3.B[i + 15] ^ ((~(SHA3.B[i + 20])) & SHA3.B[i ]);
- A[i + 20] = SHA3.B[i + 20] ^ ((~(SHA3.B[i ])) & SHA3.B[i + 5]);
- }
-
- /* ι step */
- A[0] ^= rc;
- }
-
-
- /**
- * Perform Keccak-f function
- *
- * @param A The current state
- */
- private static void keccakF(long[] A)
- {
- if (SHA3.nr == 24)
- for (int i = 0; i < 24; i++)
- SHA3.keccakFRound(A, SHA3.RC[i]);
- else
- for (int i = 0; i < SHA3.nr; i++)
- SHA3.keccakFRound(A, SHA3.RC[i] & SHA3.wmod);
- }
-
-
- /**
- * Convert a chunk of byte:s to a word
- *
- * @param n {@code Math.min(SHA3.message.length, rr) + msgoff}
- * msgoff The number of times to loop has run times the bitrate
- * rr Bitrate in bytes
- * @param ww Word size in bytes
- * @param off The offset in the message
- * @return Lane
- */
- private static long toLane(int n, int ww, int off)
- {
- long rc = 0;
- for (int i = off + ww - 1; i >= off; i--)
- rc = (rc << 8) | ((i < n) ? (long)(SHA3.message[i] & 255) : 0L);
- return rc;
- }
-
-
- /**
- * Convert a chunk of byte:s to a 64-bit word
- *
- * @param n {@code Math.min(SHA3.message.length, rr) + msgoff}
- * msgoff The number of times to loop has run times the bitrate
- * rr Bitrate in bytes
- * @param off The offset in the message
- * @return Lane
- */
- private static long toLane64(int n, int off)
- {
- return ((off + 7 < n) ? ((long)(SHA3.message[off + 7] & 255) << 56) : 0L) |
- ((off + 6 < n) ? ((long)(SHA3.message[off + 6] & 255) << 48) : 0L) |
- ((off + 5 < n) ? ((long)(SHA3.message[off + 5] & 255) << 40) : 0L) |
- ((off + 4 < n) ? ((long)(SHA3.message[off + 4] & 255) << 32) : 0L) |
- ((off + 3 < n) ? ((long)(SHA3.message[off + 3] & 255) << 24) : 0L) |
- ((off + 2 < n) ? ((long)(SHA3.message[off + 2] & 255) << 16) : 0L) |
- ((off + 1 < n) ? ((long)(SHA3.message[off + 1] & 255) << 8) : 0L) |
- ((off < n) ? ((long)(SHA3.message[off] & 255)) : 0L);
- }
-
-
- /**
- * pad 10*1
- *
- * @param msg The message to pad
- * @param len The length of the message
- * @param r The bitrate
- * @param bits The number of bits in the end of the message that does not make a whole byte
- * @return The actual length of {@link #message}
- */
- private static int pad10star1(byte[] msg, int len, int r, int bits)
- {
- len = ((len - (bits + 7) / 8) << 3) + bits;
-
- int nrf = len >> 3;
- int nbrf = len & 7;
- int ll = len % r;
-
- byte b = (byte)(nbrf == 0 ? 1 : (msg[nrf] | (1 << nbrf)));
-
- if ((r - 8 <= ll) && (ll <= r - 2))
- {
- SHA3.message = new byte[len = nrf + 1];
- SHA3.message[nrf] = (byte)(b ^ 128);
- }
- else
- {
- len = (nrf + 1) << 3;
- len = ((len - (len % r) + (r - 8)) >> 3) + 1;
- SHA3.message = new byte[len];
- SHA3.message[nrf] = b;
- SHA3.message[len - 1] = -128;
- }
-
- System.arraycopy(msg, 0, SHA3.message, 0, nrf);
- return len;
- }
-
-
- /**
- * Initialise Keccak sponge
- *
- * @param r The bitrate
- * @param c The capacity
- * @param n The output size
- */
- public static void initialise(int r, int c, int n)
- {
- SHA3.r = r;
- SHA3.c = c;
- SHA3.n = n;
- SHA3.b = r + c;
- SHA3.w = SHA3.b / 25;
- SHA3.l = SHA3.lb(SHA3.w);
- SHA3.nr = 12 + (SHA3.l << 1);
- SHA3.wmod = w == 64 ? -1L : (1L << SHA3.w) - 1L;
- SHA3.S = new long[25];
- if ((SHA3.M == null) || ((SHA3.r * SHA3.b) >> 2 != SHA3.M.length))
- SHA3.M = new byte[(SHA3.r * SHA3.b) >> 2];
- SHA3.mptr = 0;
- if (SHA3.message == null)
- SHA3.message = new byte[8 << 10];
- }
-
-
- /**
- * Free up static resources
- */
- public static void dispose()
- {
- SHA3.S = null;
- SHA3.M = null;
- SHA3.message = null;
- }
-
-
- /**
- * Absorb the more of the message message to the Keccak sponge
- *
- * @param msg The partial message
- */
- public static void update(byte[] msg)
- {
- update(msg, msg.length);
- }
-
-
- /**
- * Absorb the more of the message message to the Keccak sponge
- *
- * @param msg The partial message
- * @param msglen The length of the partial message
- */
- public static void update(byte[] msg, int msglen)
- {
- int rr = SHA3.r >> 3;
- int ww = SHA3.w >> 3;
-
- if (SHA3.mptr + msglen > SHA3.M.length)
- System.arraycopy(SHA3.M, 0, SHA3.M = new byte[(SHA3.M.length + msglen) << 1], 0, SHA3.mptr);
- System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msglen);
- int len = SHA3.mptr += msglen;
- len -= len % ((SHA3.r * SHA3.b) >> 3);
- System.arraycopy(SHA3.M, 0, (SHA3.message.length < len) ? (SHA3.message = new byte[len]) : SHA3.message, 0, len);
- System.arraycopy(SHA3.M, len, SHA3.M, 0, SHA3.mptr -= len);
- int n = Math.min(len, rr);
-
- /* Absorbing phase */
- if (ww == 8)
- for (int i = 0; i < len; i += rr)
- {
- SHA3.S[ 0] ^= SHA3.toLane64(n, i + 0);
- SHA3.S[ 5] ^= SHA3.toLane64(n, i + 8);
- SHA3.S[10] ^= SHA3.toLane64(n, i + 16);
- SHA3.S[15] ^= SHA3.toLane64(n, i + 24);
- SHA3.S[20] ^= SHA3.toLane64(n, i + 32);
- SHA3.S[ 1] ^= SHA3.toLane64(n, i + 40);
- SHA3.S[ 6] ^= SHA3.toLane64(n, i + 48);
- SHA3.S[11] ^= SHA3.toLane64(n, i + 56);
- SHA3.S[16] ^= SHA3.toLane64(n, i + 64);
- SHA3.S[21] ^= SHA3.toLane64(n, i + 72);
- SHA3.S[ 2] ^= SHA3.toLane64(n, i + 80);
- SHA3.S[ 7] ^= SHA3.toLane64(n, i + 88);
- SHA3.S[12] ^= SHA3.toLane64(n, i + 96);
- SHA3.S[17] ^= SHA3.toLane64(n, i + 104);
- SHA3.S[22] ^= SHA3.toLane64(n, i + 112);
- SHA3.S[ 3] ^= SHA3.toLane64(n, i + 120);
- SHA3.S[ 8] ^= SHA3.toLane64(n, i + 128);
- SHA3.S[13] ^= SHA3.toLane64(n, i + 136);
- SHA3.S[18] ^= SHA3.toLane64(n, i + 144);
- SHA3.S[23] ^= SHA3.toLane64(n, i + 152);
- SHA3.S[ 4] ^= SHA3.toLane64(n, i + 160);
- SHA3.S[ 9] ^= SHA3.toLane64(n, i + 168);
- SHA3.S[14] ^= SHA3.toLane64(n, i + 176);
- SHA3.S[19] ^= SHA3.toLane64(n, i + 184);
- SHA3.S[24] ^= SHA3.toLane64(n, i + 192);
- SHA3.keccakF(SHA3.S);
- n += rr;
- }
- else
- for (int i = 0; i < len; i += rr)
- {
- SHA3.S[ 0] ^= SHA3.toLane(n, ww, i + 0 );
- SHA3.S[ 5] ^= SHA3.toLane(n, ww, i + ww);
- SHA3.S[10] ^= SHA3.toLane(n, ww, i + 2 * ww);
- SHA3.S[15] ^= SHA3.toLane(n, ww, i + 3 * ww);
- SHA3.S[20] ^= SHA3.toLane(n, ww, i + 4 * ww);
- SHA3.S[ 1] ^= SHA3.toLane(n, ww, i + 5 * ww);
- SHA3.S[ 6] ^= SHA3.toLane(n, ww, i + 6 * ww);
- SHA3.S[11] ^= SHA3.toLane(n, ww, i + 7 * ww);
- SHA3.S[16] ^= SHA3.toLane(n, ww, i + 8 * ww);
- SHA3.S[21] ^= SHA3.toLane(n, ww, i + 9 * ww);
- SHA3.S[ 2] ^= SHA3.toLane(n, ww, i + 10 * ww);
- SHA3.S[ 7] ^= SHA3.toLane(n, ww, i + 11 * ww);
- SHA3.S[12] ^= SHA3.toLane(n, ww, i + 12 * ww);
- SHA3.S[17] ^= SHA3.toLane(n, ww, i + 13 * ww);
- SHA3.S[22] ^= SHA3.toLane(n, ww, i + 14 * ww);
- SHA3.S[ 3] ^= SHA3.toLane(n, ww, i + 15 * ww);
- SHA3.S[ 8] ^= SHA3.toLane(n, ww, i + 16 * ww);
- SHA3.S[13] ^= SHA3.toLane(n, ww, i + 17 * ww);
- SHA3.S[18] ^= SHA3.toLane(n, ww, i + 18 * ww);
- SHA3.S[23] ^= SHA3.toLane(n, ww, i + 19 * ww);
- SHA3.S[ 4] ^= SHA3.toLane(n, ww, i + 20 * ww);
- SHA3.S[ 9] ^= SHA3.toLane(n, ww, i + 21 * ww);
- SHA3.S[14] ^= SHA3.toLane(n, ww, i + 22 * ww);
- SHA3.S[19] ^= SHA3.toLane(n, ww, i + 23 * ww);
- SHA3.S[24] ^= SHA3.toLane(n, ww, i + 24 * ww);
- SHA3.keccakF(SHA3.S);
- n += rr;
- }
- }
-
-
- /**
- * Squeeze the Keccak sponge
- *
- * @return The hash sum
- */
- public static byte[] digest()
- {
- return digest(null, 0, 0, SHA3.SHA3_SUFFIX, true);
- }
-
-
- /**
- * Squeeze the Keccak sponge
- *
- * @param suffix The suffix concatenate to the message
- * @return The hash sum
- */
- public static byte[] digest(String suffix)
- {
- return digest(null, 0, 0, suffix, true);
- }
-
-
- /**
- * Squeeze the Keccak sponge
- *
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(boolean withReturn)
- {
- return digest(null, 0, 0, SHA3.SHA3_SUFFIX, withReturn);
- }
-
-
- /**
- * Squeeze the Keccak sponge
- *
- * @param suffix The suffix concatenate to the message
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(String suffix, boolean withReturn)
- {
- return digest(null, 0, 0, suffix, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, SHA3.SHA3_SUFFIX, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param suffix The suffix concatenate to the message
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg, String suffix)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, suffix, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, boolean withReturn)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, SHA3.SHA3_SUFFIX, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param suffix The suffix concatenate to the message
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, String suffix, boolean withReturn)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, suffix, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg, int msglen)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, SHA3.SHA3_SUFFIX, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param suffix The suffix concatenate to the message
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg, int msglen, String suffix)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, suffix, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param bits The number of bits at the end of the message not covered by <tt>msglen</tt>
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg, int msglen, int bits)
- {
- return digest(msg, msg == null ? 0 : msg.length, bits, SHA3.SHA3_SUFFIX, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param bits The number of bits at the end of the message not covered by <tt>msglen</tt>
- * @param suffix The suffix concatenate to the message
- * @return The hash sum
- */
- public static byte[] digest(byte[] msg, int msglen, int bits, String suffix)
- {
- return digest(msg, msg == null ? 0 : msg.length, bits, suffix, true);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, int msglen, boolean withReturn)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, SHA3.SHA3_SUFFIX, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param suffix The suffix concatenate to the message
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, int msglen, String suffix, boolean withReturn)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, suffix, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param bits The number of bits at the end of the message not covered by <tt>msglen</tt>
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, int msglen, int bits, boolean withReturn)
- {
- return digest(msg, msg == null ? 0 : msg.length, 0, SHA3.SHA3_SUFFIX, withReturn);
- }
-
-
- /**
- * Absorb the last part of the message and squeeze the Keccak sponge
- *
- * @param msg The rest of the message
- * @param msglen The length of the partial message in while bytes
- * @param bits The number of bits at the end of the message not covered by <tt>msglen</tt>
- * @param suffix The suffix concatenate to the message
- * @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
- * @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
- */
- public static byte[] digest(byte[] msg, int msglen, int bits, String suffix, boolean withReturn)
- {
- int len;
- byte last_byte = 0;
- if ((msg == null) || (msglen == 0))
- {
- msg = new byte[0];
- bits = 0;
- }
-
- msglen += bits / 8;
- if ((bits %= 8) != 0)
- last_byte = msg[msglen];
-
- byte[] msg_end = new byte[(suffix.length() + bits + 7) / 8];
- int msg_end_ptr = 0;
- for (int i = 0, n = suffix.length(); i < n; i++)
- {
- byte bit = (byte)(suffix.charAt(i) - '0');
- last_byte |= bit << bits++;
- if (bits == 8)
- {
- msg_end[msg_end_ptr++] = last_byte;
- last_byte = 0;
- bits = 0;
- }
- }
- if (bits != 0)
- msg_end[msg_end_ptr++] = last_byte;
- if (msg_end_ptr > 0)
- {
- if (msglen + msg_end_ptr > msg.length)
- System.arraycopy(msg, 0, msg = new byte[msglen + msg_end_ptr], 0, msglen);
- System.arraycopy(msg_end, 0, msg, msglen, msg_end_ptr);
- msglen += msg_end_ptr;
- }
-
- if (SHA3.mptr + msglen > SHA3.M.length)
- System.arraycopy(SHA3.M, 0, SHA3.M = new byte[SHA3.M.length + msglen], 0, SHA3.mptr);
- System.arraycopy(msg, 0, SHA3.M, SHA3.mptr, msglen);
- len = SHA3.pad10star1(SHA3.M, SHA3.mptr + msglen, SHA3.r, bits);
-
- int rr = SHA3.r >> 3;
- int nn = (SHA3.n + 7) >> 3;
- int ww = SHA3.w >> 3;
-
- int n = Math.min(len, rr);
-
- /* Absorbing phase */
- if (ww == 8)
- for (int i = 0; i < len; i += rr)
- {
- SHA3.S[ 0] ^= SHA3.toLane64(n, i + 0);
- SHA3.S[ 5] ^= SHA3.toLane64(n, i + 8);
- SHA3.S[10] ^= SHA3.toLane64(n, i + 16);
- SHA3.S[15] ^= SHA3.toLane64(n, i + 24);
- SHA3.S[20] ^= SHA3.toLane64(n, i + 32);
- SHA3.S[ 1] ^= SHA3.toLane64(n, i + 40);
- SHA3.S[ 6] ^= SHA3.toLane64(n, i + 48);
- SHA3.S[11] ^= SHA3.toLane64(n, i + 56);
- SHA3.S[16] ^= SHA3.toLane64(n, i + 64);
- SHA3.S[21] ^= SHA3.toLane64(n, i + 72);
- SHA3.S[ 2] ^= SHA3.toLane64(n, i + 80);
- SHA3.S[ 7] ^= SHA3.toLane64(n, i + 88);
- SHA3.S[12] ^= SHA3.toLane64(n, i + 96);
- SHA3.S[17] ^= SHA3.toLane64(n, i + 104);
- SHA3.S[22] ^= SHA3.toLane64(n, i + 112);
- SHA3.S[ 3] ^= SHA3.toLane64(n, i + 120);
- SHA3.S[ 8] ^= SHA3.toLane64(n, i + 128);
- SHA3.S[13] ^= SHA3.toLane64(n, i + 136);
- SHA3.S[18] ^= SHA3.toLane64(n, i + 144);
- SHA3.S[23] ^= SHA3.toLane64(n, i + 152);
- SHA3.S[ 4] ^= SHA3.toLane64(n, i + 160);
- SHA3.S[ 9] ^= SHA3.toLane64(n, i + 168);
- SHA3.S[14] ^= SHA3.toLane64(n, i + 176);
- SHA3.S[19] ^= SHA3.toLane64(n, i + 184);
- SHA3.S[24] ^= SHA3.toLane64(n, i + 192);
- SHA3.keccakF(SHA3.S);
- n += rr;
- }
- else
- for (int i = 0; i < len; i += rr)
- {
- SHA3.S[ 0] ^= SHA3.toLane(n, ww, i + 0 );
- SHA3.S[ 5] ^= SHA3.toLane(n, ww, i + ww);
- SHA3.S[10] ^= SHA3.toLane(n, ww, i + 2 * ww);
- SHA3.S[15] ^= SHA3.toLane(n, ww, i + 3 * ww);
- SHA3.S[20] ^= SHA3.toLane(n, ww, i + 4 * ww);
- SHA3.S[ 1] ^= SHA3.toLane(n, ww, i + 5 * ww);
- SHA3.S[ 6] ^= SHA3.toLane(n, ww, i + 6 * ww);
- SHA3.S[11] ^= SHA3.toLane(n, ww, i + 7 * ww);
- SHA3.S[16] ^= SHA3.toLane(n, ww, i + 8 * ww);
- SHA3.S[21] ^= SHA3.toLane(n, ww, i + 9 * ww);
- SHA3.S[ 2] ^= SHA3.toLane(n, ww, i + 10 * ww);
- SHA3.S[ 7] ^= SHA3.toLane(n, ww, i + 11 * ww);
- SHA3.S[12] ^= SHA3.toLane(n, ww, i + 12 * ww);
- SHA3.S[17] ^= SHA3.toLane(n, ww, i + 13 * ww);
- SHA3.S[22] ^= SHA3.toLane(n, ww, i + 14 * ww);
- SHA3.S[ 3] ^= SHA3.toLane(n, ww, i + 15 * ww);
- SHA3.S[ 8] ^= SHA3.toLane(n, ww, i + 16 * ww);
- SHA3.S[13] ^= SHA3.toLane(n, ww, i + 17 * ww);
- SHA3.S[18] ^= SHA3.toLane(n, ww, i + 18 * ww);
- SHA3.S[23] ^= SHA3.toLane(n, ww, i + 19 * ww);
- SHA3.S[ 4] ^= SHA3.toLane(n, ww, i + 20 * ww);
- SHA3.S[ 9] ^= SHA3.toLane(n, ww, i + 21 * ww);
- SHA3.S[14] ^= SHA3.toLane(n, ww, i + 22 * ww);
- SHA3.S[19] ^= SHA3.toLane(n, ww, i + 23 * ww);
- SHA3.S[24] ^= SHA3.toLane(n, ww, i + 24 * ww);
- SHA3.keccakF(SHA3.S);
- n += rr;
- }
-
- /* Squeezing phase */
- if (withReturn)
- {
- byte[] rc = new byte[(SHA3.n + 7) >> 3];
- int ptr = 0;
-
- int olen = SHA3.n;
- int j = 0;
- int ni = rr / ww;
- while (olen > 0)
- {
- int i = 0;
- while ((i < ni) && (j < nn))
- {
- long v = SHA3.S[(i % 5) * 5 + i / 5];
- for (int k = 0; k < ww; k++)
- {
- if (j < nn)
- {
- rc[ptr] = (byte)v;
- ptr += 1;
- }
- v >>= 8;
- j += 1;
- }
- i += 1;
- }
- olen -= SHA3.r;
- if (olen > 0)
- SHA3.keccakF(SHA3.S);
- }
- if ((SHA3.n & 7) != 0)
- rc[rc.length - 1] &= (1 << (SHA3.n & 7)) - 1;
-
- return rc;
- }
- int olen = SHA3.n;
- while ((olen -= SHA3.r) > 0)
- SHA3.keccakF(SHA3.S);
- return null;
- }
-
-
- /**
- * Force a round of Keccak-f
- */
- public static void simpleSqueeze()
- {
- SHA3.keccakF(SHA3.S);
- }
-
-
- /**
- * Force some rounds of Keccak-f
- *
- * @param times The number of rounds
- */
- public static void simpleSqueeze(int times)
- {
- for (int i = 0; i < times; i++)
- SHA3.keccakF(SHA3.S);
- }
-
-
- /**
- * Squeeze as much as is needed to get a digest
- */
- public static void fastSqueeze()
- {
- SHA3.keccakF(SHA3.S); /* Last squeeze did not do a ending squeeze */
- int olen = SHA3.n;
- while ((olen -= SHA3.r) > 0)
- SHA3.keccakF(SHA3.S);
- }
-
-
- /**
- * Squeeze as much as is needed to get a digest a number of times
- *
- * @param times The number of digests
- */
- public static void fastSqueeze(int times)
- {
- for (int i = 0; i < times; i++)
- {
- SHA3.keccakF(SHA3.S); /* Last squeeze did not do a ending squeeze */
- int olen = SHA3.n;
- while ((olen -= SHA3.r) > 0)
- SHA3.keccakF(SHA3.S);
- }
- }
-
-
- /**
- * Squeeze out another digest
- *
- * @return The hash sum
- */
- public static byte[] squeeze()
- {
- SHA3.keccakF(SHA3.S); /* Last squeeze did not do a ending squeeze */
-
- int nn, ww = SHA3.w >> 3;
- byte[] rc = new byte[nn = (SHA3.n + 7) >> 3];
-
- int olen = SHA3.n;
- int j = 0, ptr = 0;
- int ni = (SHA3.r >> 3) / ww;
- while (olen > 0)
- {
- int i = 0;
- while ((i < ni) && (j < nn))
- {
- long v = SHA3.S[(i % 5) * 5 + i / 5];
- for (int k = 0; k < ww; k++)
- {
- if (j < nn)
- {
- rc[ptr] = (byte)v;
- ptr += 1;
- }
- v >>= 8;
- j += 1;
- }
- i += 1;
- }
- olen -= SHA3.r;
- if (olen > 0)
- SHA3.keccakF(SHA3.S);
- }
- if ((SHA3.n & 7) != 0)
- rc[rc.length - 1] &= (1 << (SHA3.n & 7)) - 1;
-
- return rc;
- }
-
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-09-20 02:31:57 +0000