293 lines
11 KiB
Java
293 lines
11 KiB
Java
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package org.bouncycastle.crypto.signers;
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import java.security.SecureRandom;
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import org.bouncycastle.crypto.AsymmetricBlockCipher;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.CryptoException;
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import org.bouncycastle.crypto.DataLengthException;
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import org.bouncycastle.crypto.Digest;
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import org.bouncycastle.crypto.Signer;
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import org.bouncycastle.crypto.params.ParametersWithRandom;
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import org.bouncycastle.crypto.params.RSABlindingParameters;
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import org.bouncycastle.crypto.params.RSAKeyParameters;
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/* loaded from: classes6.dex */
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public class PSSSigner implements Signer {
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public static final byte TRAILER_IMPLICIT = -68;
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private byte[] block;
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private AsymmetricBlockCipher cipher;
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private Digest contentDigest;
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private int emBits;
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private int hLen;
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private byte[] mDash;
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private Digest mgfDigest;
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private int mgfhLen;
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private SecureRandom random;
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private int sLen;
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private boolean sSet;
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private byte[] salt;
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private byte trailer;
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@Override // org.bouncycastle.crypto.Signer
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public boolean verifySignature(byte[] bArr) {
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Digest digest = this.contentDigest;
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byte[] bArr2 = this.mDash;
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digest.doFinal(bArr2, (bArr2.length - this.hLen) - this.sLen);
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try {
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byte[] processBlock = this.cipher.processBlock(bArr, 0, bArr.length);
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byte[] bArr3 = this.block;
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System.arraycopy(processBlock, 0, bArr3, bArr3.length - processBlock.length, processBlock.length);
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byte[] bArr4 = this.block;
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if (bArr4[bArr4.length - 1] != this.trailer) {
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clearBlock(bArr4);
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return false;
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}
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int length = bArr4.length;
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int i = this.hLen;
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byte[] maskGeneratorFunction1 = maskGeneratorFunction1(bArr4, (length - i) - 1, i, (bArr4.length - i) - 1);
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for (int i2 = 0; i2 != maskGeneratorFunction1.length; i2++) {
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byte[] bArr5 = this.block;
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bArr5[i2] = (byte) (bArr5[i2] ^ maskGeneratorFunction1[i2]);
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}
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byte[] bArr6 = this.block;
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bArr6[0] = (byte) (bArr6[0] & (255 >> ((bArr6.length << 3) - this.emBits)));
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int i3 = 0;
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while (true) {
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byte[] bArr7 = this.block;
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int length2 = bArr7.length;
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int i4 = this.hLen;
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int i5 = this.sLen;
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if (i3 != ((length2 - i4) - i5) - 2) {
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if (bArr7[i3] != 0) {
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clearBlock(bArr7);
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return false;
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}
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i3++;
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} else {
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if (bArr7[((bArr7.length - i4) - i5) - 2] != 1) {
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clearBlock(bArr7);
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return false;
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}
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if (this.sSet) {
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byte[] bArr8 = this.salt;
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byte[] bArr9 = this.mDash;
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System.arraycopy(bArr8, 0, bArr9, bArr9.length - i5, i5);
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} else {
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int length3 = bArr7.length;
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byte[] bArr10 = this.mDash;
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System.arraycopy(bArr7, ((length3 - i5) - i4) - 1, bArr10, bArr10.length - i5, i5);
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}
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Digest digest2 = this.contentDigest;
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byte[] bArr11 = this.mDash;
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digest2.update(bArr11, 0, bArr11.length);
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Digest digest3 = this.contentDigest;
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byte[] bArr12 = this.mDash;
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digest3.doFinal(bArr12, bArr12.length - this.hLen);
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int length4 = this.block.length;
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int i6 = this.hLen;
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int i7 = (length4 - i6) - 1;
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int length5 = this.mDash.length - i6;
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while (true) {
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byte[] bArr13 = this.mDash;
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if (length5 == bArr13.length) {
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clearBlock(bArr13);
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clearBlock(this.block);
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return true;
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}
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if ((this.block[i7] ^ bArr13[length5]) != 0) {
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clearBlock(bArr13);
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clearBlock(this.block);
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return false;
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}
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i7++;
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length5++;
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}
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}
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}
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} catch (Exception unused) {
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return false;
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}
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}
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@Override // org.bouncycastle.crypto.Signer
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public void update(byte[] bArr, int i, int i2) {
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this.contentDigest.update(bArr, i, i2);
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}
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@Override // org.bouncycastle.crypto.Signer
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public void update(byte b) {
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this.contentDigest.update(b);
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}
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@Override // org.bouncycastle.crypto.Signer
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public void reset() {
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this.contentDigest.reset();
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}
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@Override // org.bouncycastle.crypto.Signer
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public void init(boolean z, CipherParameters cipherParameters) {
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CipherParameters cipherParameters2;
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RSAKeyParameters rSAKeyParameters;
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if (cipherParameters instanceof ParametersWithRandom) {
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ParametersWithRandom parametersWithRandom = (ParametersWithRandom) cipherParameters;
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cipherParameters2 = parametersWithRandom.getParameters();
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this.random = parametersWithRandom.getRandom();
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} else {
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if (z) {
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this.random = new SecureRandom();
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}
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cipherParameters2 = cipherParameters;
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}
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if (cipherParameters2 instanceof RSABlindingParameters) {
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rSAKeyParameters = ((RSABlindingParameters) cipherParameters2).getPublicKey();
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this.cipher.init(z, cipherParameters);
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} else {
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rSAKeyParameters = (RSAKeyParameters) cipherParameters2;
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this.cipher.init(z, cipherParameters2);
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}
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int bitLength = rSAKeyParameters.getModulus().bitLength();
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int i = bitLength - 1;
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this.emBits = i;
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if (i < (this.hLen << 3) + (this.sLen << 3) + 9) {
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throw new IllegalArgumentException("key too small for specified hash and salt lengths");
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}
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this.block = new byte[(bitLength + 6) / 8];
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reset();
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}
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@Override // org.bouncycastle.crypto.Signer
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public byte[] generateSignature() throws CryptoException, DataLengthException {
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Digest digest = this.contentDigest;
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byte[] bArr = this.mDash;
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digest.doFinal(bArr, (bArr.length - this.hLen) - this.sLen);
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if (this.sLen != 0) {
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if (!this.sSet) {
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this.random.nextBytes(this.salt);
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}
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byte[] bArr2 = this.salt;
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byte[] bArr3 = this.mDash;
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int length = bArr3.length;
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int i = this.sLen;
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System.arraycopy(bArr2, 0, bArr3, length - i, i);
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}
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int i2 = this.hLen;
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byte[] bArr4 = new byte[i2];
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Digest digest2 = this.contentDigest;
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byte[] bArr5 = this.mDash;
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digest2.update(bArr5, 0, bArr5.length);
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this.contentDigest.doFinal(bArr4, 0);
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byte[] bArr6 = this.block;
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int length2 = bArr6.length;
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int i3 = this.sLen;
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int i4 = this.hLen;
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bArr6[(((length2 - i3) - 1) - i4) - 1] = 1;
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System.arraycopy(this.salt, 0, bArr6, ((bArr6.length - i3) - i4) - 1, i3);
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byte[] maskGeneratorFunction1 = maskGeneratorFunction1(bArr4, 0, i2, (this.block.length - this.hLen) - 1);
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for (int i5 = 0; i5 != maskGeneratorFunction1.length; i5++) {
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byte[] bArr7 = this.block;
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bArr7[i5] = (byte) (bArr7[i5] ^ maskGeneratorFunction1[i5]);
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}
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byte[] bArr8 = this.block;
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bArr8[0] = (byte) (bArr8[0] & (255 >> ((bArr8.length << 3) - this.emBits)));
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int length3 = bArr8.length;
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int i6 = this.hLen;
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System.arraycopy(bArr4, 0, bArr8, (length3 - i6) - 1, i6);
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byte[] bArr9 = this.block;
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bArr9[bArr9.length - 1] = this.trailer;
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byte[] processBlock = this.cipher.processBlock(bArr9, 0, bArr9.length);
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clearBlock(this.block);
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return processBlock;
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}
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private byte[] maskGeneratorFunction1(byte[] bArr, int i, int i2, int i3) {
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int i4;
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byte[] bArr2 = new byte[i3];
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byte[] bArr3 = new byte[this.mgfhLen];
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byte[] bArr4 = new byte[4];
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this.mgfDigest.reset();
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int i5 = 0;
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while (true) {
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i4 = this.mgfhLen;
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if (i5 >= i3 / i4) {
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break;
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}
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ItoOSP(i5, bArr4);
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this.mgfDigest.update(bArr, i, i2);
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this.mgfDigest.update(bArr4, 0, 4);
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this.mgfDigest.doFinal(bArr3, 0);
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int i6 = this.mgfhLen;
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System.arraycopy(bArr3, 0, bArr2, i5 * i6, i6);
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i5++;
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}
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if (i4 * i5 < i3) {
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ItoOSP(i5, bArr4);
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this.mgfDigest.update(bArr, i, i2);
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this.mgfDigest.update(bArr4, 0, 4);
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this.mgfDigest.doFinal(bArr3, 0);
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int i7 = i5 * this.mgfhLen;
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System.arraycopy(bArr3, 0, bArr2, i7, i3 - i7);
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}
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return bArr2;
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}
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private void clearBlock(byte[] bArr) {
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for (int i = 0; i != bArr.length; i++) {
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bArr[i] = 0;
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}
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}
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private void ItoOSP(int i, byte[] bArr) {
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bArr[0] = (byte) (i >>> 24);
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bArr[1] = (byte) (i >>> 16);
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bArr[2] = (byte) (i >>> 8);
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bArr[3] = (byte) i;
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, byte[] bArr) {
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this(asymmetricBlockCipher, digest, digest, bArr, TRAILER_IMPLICIT);
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, Digest digest2, byte[] bArr, byte b) {
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this.cipher = asymmetricBlockCipher;
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this.contentDigest = digest;
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this.mgfDigest = digest2;
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this.hLen = digest.getDigestSize();
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this.mgfhLen = digest2.getDigestSize();
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this.sSet = true;
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int length = bArr.length;
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this.sLen = length;
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this.salt = bArr;
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this.mDash = new byte[length + 8 + this.hLen];
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this.trailer = b;
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, Digest digest2, byte[] bArr) {
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this(asymmetricBlockCipher, digest, digest2, bArr, TRAILER_IMPLICIT);
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, Digest digest2, int i, byte b) {
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this.cipher = asymmetricBlockCipher;
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this.contentDigest = digest;
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this.mgfDigest = digest2;
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this.hLen = digest.getDigestSize();
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this.mgfhLen = digest2.getDigestSize();
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this.sSet = false;
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this.sLen = i;
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this.salt = new byte[i];
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this.mDash = new byte[i + 8 + this.hLen];
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this.trailer = b;
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, Digest digest2, int i) {
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this(asymmetricBlockCipher, digest, digest2, i, TRAILER_IMPLICIT);
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, int i, byte b) {
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this(asymmetricBlockCipher, digest, digest, i, b);
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}
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public PSSSigner(AsymmetricBlockCipher asymmetricBlockCipher, Digest digest, int i) {
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this(asymmetricBlockCipher, digest, i, TRAILER_IMPLICIT);
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}
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}
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