93 lines
3.1 KiB
Java
93 lines
3.1 KiB
Java
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package org.bouncycastle.pqc.crypto.sphincs;
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import com.google.common.primitives.UnsignedBytes;
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/* loaded from: classes6.dex */
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class Wots {
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static final int WOTS_L = 67;
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static final int WOTS_L1 = 64;
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static final int WOTS_LOGW = 4;
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static final int WOTS_LOG_L = 7;
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static final int WOTS_SIGBYTES = 2144;
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static final int WOTS_W = 16;
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/* JADX INFO: Access modifiers changed from: package-private */
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public void wots_verify(HashFunctions hashFunctions, byte[] bArr, byte[] bArr2, int i, byte[] bArr3, byte[] bArr4) {
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int[] iArr = new int[67];
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int i2 = 0;
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int i3 = 0;
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while (i2 < 64) {
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byte b = bArr3[i2 / 2];
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iArr[i2] = b & 15;
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int i4 = (b & UnsignedBytes.MAX_VALUE) >>> 4;
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iArr[i2 + 1] = i4;
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i3 = i3 + (15 - iArr[i2]) + (15 - i4);
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i2 += 2;
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}
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while (i2 < 67) {
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iArr[i2] = i3 & 15;
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i3 >>>= 4;
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i2++;
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}
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for (int i5 = 0; i5 < 67; i5++) {
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int i6 = i5 << 5;
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int i7 = iArr[i5];
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gen_chain(hashFunctions, bArr, i6, bArr2, i + i6, bArr4, i7 << 5, 15 - i7);
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}
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public void wots_sign(HashFunctions hashFunctions, byte[] bArr, int i, byte[] bArr2, byte[] bArr3, byte[] bArr4) {
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int[] iArr = new int[67];
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int i2 = 0;
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int i3 = 0;
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while (i2 < 64) {
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byte b = bArr2[i2 / 2];
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iArr[i2] = b & 15;
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int i4 = (b & UnsignedBytes.MAX_VALUE) >>> 4;
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iArr[i2 + 1] = i4;
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i3 = i3 + (15 - iArr[i2]) + (15 - i4);
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i2 += 2;
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}
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while (i2 < 67) {
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iArr[i2] = i3 & 15;
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i3 >>>= 4;
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i2++;
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}
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expand_seed(bArr, i, bArr3, 0);
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for (int i5 = 0; i5 < 67; i5++) {
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int i6 = i + (i5 << 5);
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gen_chain(hashFunctions, bArr, i6, bArr, i6, bArr4, 0, iArr[i5]);
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}
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public void wots_pkgen(HashFunctions hashFunctions, byte[] bArr, int i, byte[] bArr2, int i2, byte[] bArr3, int i3) {
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expand_seed(bArr, i, bArr2, i2);
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for (int i4 = 0; i4 < 67; i4++) {
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int i5 = i + (i4 << 5);
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gen_chain(hashFunctions, bArr, i5, bArr, i5, bArr3, i3, 15);
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}
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}
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static void gen_chain(HashFunctions hashFunctions, byte[] bArr, int i, byte[] bArr2, int i2, byte[] bArr3, int i3, int i4) {
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for (int i5 = 0; i5 < 32; i5++) {
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bArr[i5 + i] = bArr2[i5 + i2];
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}
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for (int i6 = 0; i6 < i4 && i6 < 16; i6++) {
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hashFunctions.hash_n_n_mask(bArr, i, bArr, i, bArr3, i3 + (i6 << 5));
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}
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}
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static void expand_seed(byte[] bArr, int i, byte[] bArr2, int i2) {
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clear(bArr, i, WOTS_SIGBYTES);
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Seed.prg(bArr, i, 2144L, bArr2, i2);
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}
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private static void clear(byte[] bArr, int i, int i2) {
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for (int i3 = 0; i3 != i2; i3++) {
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bArr[i3 + i] = 0;
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}
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}
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}
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