186 lines
7.6 KiB
Java
186 lines
7.6 KiB
Java
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package org.bouncycastle.crypto.engines;
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import com.google.common.primitives.UnsignedBytes;
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import org.bouncycastle.crypto.BlockCipher;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.DataLengthException;
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import org.bouncycastle.crypto.OutputLengthException;
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import org.bouncycastle.crypto.params.KeyParameter;
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import org.bouncycastle.crypto.tls.AlertDescription;
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/* loaded from: classes6.dex */
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public class SkipjackEngine implements BlockCipher {
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static final int BLOCK_SIZE = 8;
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static short[] ftable = {163, 215, 9, 131, 248, 72, 246, 244, 179, 33, 21, 120, 153, 177, 175, 249, 231, 45, 77, 138, 206, 76, 202, 46, 82, 149, 217, 30, 78, 56, 68, 40, 10, 223, 2, 160, 23, 241, 96, 104, 18, 183, 122, 195, 233, 250, 61, 83, 150, 132, 107, 186, 242, 99, 154, 25, 124, 174, 229, 245, 247, 22, 106, 162, 57, 182, 123, 15, 193, 147, 129, 27, 238, 180, 26, 234, 208, 145, 47, 184, 85, 185, 218, 133, 63, 65, 191, 224, 90, 88, 128, 95, 102, 11, 216, 144, 53, 213, 192, 167, 51, 6, 101, 105, 69, 0, 148, 86, 109, 152, 155, 118, 151, 252, 178, 194, 176, 254, 219, 32, 225, 235, 214, 228, 221, 71, 74, 29, 66, 237, 158, AlertDescription.unsupported_extension, 73, 60, 205, 67, 39, 210, 7, 212, 222, 199, 103, 24, 137, 203, 48, 31, 141, 198, 143, 170, 200, 116, 220, 201, 93, 92, 49, 164, AlertDescription.unrecognized_name, 136, 97, 44, 159, 13, 43, 135, 80, 130, 84, 100, 38, 125, 3, 64, 52, 75, 28, AlertDescription.unknown_psk_identity, 209, 196, 253, 59, 204, 251, 127, 171, 230, 62, 91, 165, 173, 4, 35, 156, 20, 81, 34, 240, 41, 121, AlertDescription.bad_certificate_status_response, 126, 255, 140, 14, 226, 12, 239, 188, AlertDescription.bad_certificate_hash_value, 117, AlertDescription.certificate_unobtainable, 55, 161, 236, 211, 142, 98, 139, 134, 16, 232, 8, 119, 17, 190, 146, 79, 36, 197, 50, 54, 157, 207, 243, 166, 187, 172, 94, 108, 169, 19, 87, 37, 181, 227, 189, 168, 58, 1, 5, 89, 42, 70};
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private boolean encrypting;
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private int[] key0;
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private int[] key1;
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private int[] key2;
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private int[] key3;
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@Override // org.bouncycastle.crypto.BlockCipher
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public int getBlockSize() {
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return 8;
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}
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@Override // org.bouncycastle.crypto.BlockCipher
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public void reset() {
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}
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@Override // org.bouncycastle.crypto.BlockCipher
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public int processBlock(byte[] bArr, int i, byte[] bArr2, int i2) {
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if (this.key1 == null) {
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throw new IllegalStateException("SKIPJACK engine not initialised");
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}
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if (i + 8 > bArr.length) {
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throw new DataLengthException("input buffer too short");
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}
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if (i2 + 8 > bArr2.length) {
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throw new OutputLengthException("output buffer too short");
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}
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if (this.encrypting) {
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encryptBlock(bArr, i, bArr2, i2);
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return 8;
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}
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decryptBlock(bArr, i, bArr2, i2);
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return 8;
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}
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@Override // org.bouncycastle.crypto.BlockCipher
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public void init(boolean z, CipherParameters cipherParameters) {
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if (!(cipherParameters instanceof KeyParameter)) {
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StringBuilder sb = new StringBuilder("invalid parameter passed to SKIPJACK init - ");
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sb.append(cipherParameters.getClass().getName());
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throw new IllegalArgumentException(sb.toString());
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}
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byte[] key = ((KeyParameter) cipherParameters).getKey();
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this.encrypting = z;
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this.key0 = new int[32];
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this.key1 = new int[32];
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this.key2 = new int[32];
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this.key3 = new int[32];
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for (int i = 0; i < 32; i++) {
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int i2 = i << 2;
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this.key0[i] = key[i2 % 10] & UnsignedBytes.MAX_VALUE;
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this.key1[i] = key[(i2 + 1) % 10] & UnsignedBytes.MAX_VALUE;
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this.key2[i] = key[(i2 + 2) % 10] & UnsignedBytes.MAX_VALUE;
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this.key3[i] = key[(i2 + 3) % 10] & UnsignedBytes.MAX_VALUE;
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}
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}
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@Override // org.bouncycastle.crypto.BlockCipher
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public String getAlgorithmName() {
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return "SKIPJACK";
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}
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public int encryptBlock(byte[] bArr, int i, byte[] bArr2, int i2) {
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int i3 = (bArr[i] << 8) + (bArr[i + 1] & UnsignedBytes.MAX_VALUE);
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int i4 = (bArr[i + 2] << 8) + (bArr[i + 3] & UnsignedBytes.MAX_VALUE);
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int i5 = (bArr[i + 4] << 8) + (bArr[i + 5] & UnsignedBytes.MAX_VALUE);
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int i6 = (bArr[i + 6] << 8) + (bArr[i + 7] & UnsignedBytes.MAX_VALUE);
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int i7 = 0;
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for (int i8 = 0; i8 < 2; i8++) {
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int i9 = 0;
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while (i9 < 8) {
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int g = g(i7, i3);
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i7++;
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i9++;
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int i10 = i4;
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i4 = g;
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i3 = (i6 ^ g) ^ i7;
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i6 = i5;
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i5 = i10;
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}
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int i11 = 0;
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while (i11 < 8) {
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int i12 = i7 + 1;
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int g2 = g(i7, i3);
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i11++;
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int i13 = (i3 ^ i4) ^ i12;
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i4 = g2;
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i7 = i12;
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int i14 = i5;
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i5 = i13;
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i3 = i6;
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i6 = i14;
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}
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}
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bArr2[i2] = (byte) (i3 >> 8);
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bArr2[i2 + 1] = (byte) i3;
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bArr2[i2 + 2] = (byte) (i4 >> 8);
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bArr2[i2 + 3] = (byte) i4;
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bArr2[i2 + 4] = (byte) (i5 >> 8);
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bArr2[i2 + 5] = (byte) i5;
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bArr2[i2 + 6] = (byte) (i6 >> 8);
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bArr2[i2 + 7] = (byte) i6;
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return 8;
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}
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public int decryptBlock(byte[] bArr, int i, byte[] bArr2, int i2) {
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int i3 = (bArr[i] << 8) + (bArr[i + 1] & UnsignedBytes.MAX_VALUE);
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int i4 = (bArr[i + 2] << 8) + (bArr[i + 3] & UnsignedBytes.MAX_VALUE);
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int i5 = (bArr[i + 4] << 8) + (bArr[i + 5] & UnsignedBytes.MAX_VALUE);
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int i6 = (bArr[i + 6] << 8) + (bArr[i + 7] & UnsignedBytes.MAX_VALUE);
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int i7 = 31;
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for (int i8 = 0; i8 < 2; i8++) {
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int i9 = 0;
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int i10 = i6;
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int i11 = i5;
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int i12 = i10;
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while (i9 < 8) {
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int h = h(i7, i4);
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int i13 = i7 - 1;
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i9++;
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int i14 = (i7 + 1) ^ (i11 ^ h);
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i11 = i12;
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i12 = i3;
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i3 = h;
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i4 = i14;
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i7 = i13;
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}
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int i15 = 0;
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int i16 = i11;
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i6 = i12;
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i5 = i16;
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while (i15 < 8) {
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int h2 = h(i7, i4);
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int i17 = i7 - 1;
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i15++;
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int i18 = (i7 + 1) ^ (i3 ^ i4);
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i4 = i5;
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i5 = i6;
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i3 = h2;
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i6 = i18;
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i7 = i17;
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}
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}
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bArr2[i2] = (byte) (i3 >> 8);
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bArr2[i2 + 1] = (byte) i3;
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bArr2[i2 + 2] = (byte) (i4 >> 8);
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bArr2[i2 + 3] = (byte) i4;
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bArr2[i2 + 4] = (byte) (i5 >> 8);
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bArr2[i2 + 5] = (byte) i5;
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bArr2[i2 + 6] = (byte) (i6 >> 8);
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bArr2[i2 + 7] = (byte) i6;
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return 8;
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}
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private int h(int i, int i2) {
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int i3 = (i2 >> 8) & 255;
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short[] sArr = ftable;
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int i4 = (i2 & 255) ^ sArr[this.key3[i] ^ i3];
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int i5 = i3 ^ sArr[this.key2[i] ^ i4];
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int i6 = i4 ^ sArr[this.key1[i] ^ i5];
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return ((sArr[this.key0[i] ^ i6] ^ i5) << 8) + i6;
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}
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private int g(int i, int i2) {
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int i3 = i2 & 255;
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short[] sArr = ftable;
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int i4 = ((i2 >> 8) & 255) ^ sArr[this.key0[i] ^ i3];
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int i5 = i3 ^ sArr[this.key1[i] ^ i4];
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int i6 = i4 ^ sArr[this.key2[i] ^ i5];
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return (i6 << 8) + (sArr[this.key3[i] ^ i6] ^ i5);
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}
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}
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