what-the-bank/sources/org/bouncycastle/crypto/encodings/PKCS1Encoding.java

package org.bouncycastle.crypto.encodings;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.SecureRandom;
import org.bouncycastle.crypto.AsymmetricBlockCipher;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ParametersWithRandom;

/* loaded from: classes6.dex */
public class PKCS1Encoding implements AsymmetricBlockCipher {
    private static final int HEADER_LENGTH = 10;
    public static final String NOT_STRICT_LENGTH_ENABLED_PROPERTY = "org.bouncycastle.pkcs1.not_strict";
    public static final String STRICT_LENGTH_ENABLED_PROPERTY = "org.bouncycastle.pkcs1.strict";
    private AsymmetricBlockCipher engine;
    private byte[] fallback;
    private boolean forEncryption;
    private boolean forPrivateKey;
    private int pLen;
    private SecureRandom random;
    private boolean useStrictLength;

    @Override // org.bouncycastle.crypto.AsymmetricBlockCipher
    public byte[] processBlock(byte[] bArr, int i, int i2) throws InvalidCipherTextException {
        return this.forEncryption ? encodeBlock(bArr, i, i2) : decodeBlock(bArr, i, i2);
    }

    @Override // org.bouncycastle.crypto.AsymmetricBlockCipher
    public void init(boolean z, CipherParameters cipherParameters) {
        AsymmetricKeyParameter asymmetricKeyParameter;
        if (cipherParameters instanceof ParametersWithRandom) {
            ParametersWithRandom parametersWithRandom = (ParametersWithRandom) cipherParameters;
            this.random = parametersWithRandom.getRandom();
            asymmetricKeyParameter = (AsymmetricKeyParameter) parametersWithRandom.getParameters();
        } else {
            asymmetricKeyParameter = (AsymmetricKeyParameter) cipherParameters;
            if (!asymmetricKeyParameter.isPrivate() && z) {
                this.random = new SecureRandom();
            }
        }
        this.engine.init(z, cipherParameters);
        this.forPrivateKey = asymmetricKeyParameter.isPrivate();
        this.forEncryption = z;
    }

    public AsymmetricBlockCipher getUnderlyingCipher() {
        return this.engine;
    }

    @Override // org.bouncycastle.crypto.AsymmetricBlockCipher
    public int getOutputBlockSize() {
        int outputBlockSize = this.engine.getOutputBlockSize();
        return this.forEncryption ? outputBlockSize : outputBlockSize - 10;
    }

    @Override // org.bouncycastle.crypto.AsymmetricBlockCipher
    public int getInputBlockSize() {
        int inputBlockSize = this.engine.getInputBlockSize();
        return this.forEncryption ? inputBlockSize - 10 : inputBlockSize;
    }

    private boolean useStrict() {
        String str = (String) AccessController.doPrivileged(new PrivilegedAction(this) { // from class: org.bouncycastle.crypto.encodings.PKCS1Encoding.1
            final PKCS1Encoding this$0;

            @Override // java.security.PrivilegedAction
            public Object run() {
                return System.getProperty(PKCS1Encoding.STRICT_LENGTH_ENABLED_PROPERTY);
            }

            {
                this.this$0 = this;
            }
        });
        return ((String) AccessController.doPrivileged(new PrivilegedAction(this) { // from class: org.bouncycastle.crypto.encodings.PKCS1Encoding.2
            final PKCS1Encoding this$0;

            @Override // java.security.PrivilegedAction
            public Object run() {
                return System.getProperty(PKCS1Encoding.NOT_STRICT_LENGTH_ENABLED_PROPERTY);
            }

            {
                this.this$0 = this;
            }
        })) != null ? !r1.equals("true") : str == null || str.equals("true");
    }

    private byte[] encodeBlock(byte[] bArr, int i, int i2) throws InvalidCipherTextException {
        if (i2 > getInputBlockSize()) {
            throw new IllegalArgumentException("input data too large");
        }
        int inputBlockSize = this.engine.getInputBlockSize();
        byte[] bArr2 = new byte[inputBlockSize];
        if (this.forPrivateKey) {
            bArr2[0] = 1;
            for (int i3 = 1; i3 != (inputBlockSize - i2) - 1; i3++) {
                bArr2[i3] = -1;
            }
        } else {
            this.random.nextBytes(bArr2);
            bArr2[0] = 2;
            for (int i4 = 1; i4 != (inputBlockSize - i2) - 1; i4++) {
                while (bArr2[i4] == 0) {
                    bArr2[i4] = (byte) this.random.nextInt();
                }
            }
        }
        int i5 = inputBlockSize - i2;
        bArr2[i5 - 1] = 0;
        System.arraycopy(bArr, i, bArr2, i5, i2);
        return this.engine.processBlock(bArr2, 0, inputBlockSize);
    }

    private byte[] decodeBlockOrRandom(byte[] bArr, int i, int i2) throws InvalidCipherTextException {
        if (!this.forPrivateKey) {
            throw new InvalidCipherTextException("sorry, this method is only for decryption, not for signing");
        }
        byte[] processBlock = this.engine.processBlock(bArr, i, i2);
        byte[] bArr2 = this.fallback;
        if (bArr2 == null) {
            bArr2 = new byte[this.pLen];
            this.random.nextBytes(bArr2);
        }
        if (processBlock.length < getOutputBlockSize()) {
            throw new InvalidCipherTextException("block truncated");
        }
        if (this.useStrictLength && processBlock.length != this.engine.getOutputBlockSize()) {
            throw new InvalidCipherTextException("block incorrect size");
        }
        int checkPkcs1Encoding = checkPkcs1Encoding(processBlock, this.pLen);
        byte[] bArr3 = new byte[this.pLen];
        int i3 = 0;
        while (true) {
            int i4 = this.pLen;
            if (i3 >= i4) {
                return bArr3;
            }
            bArr3[i3] = (byte) ((processBlock[(processBlock.length - i4) + i3] & (~checkPkcs1Encoding)) | (bArr2[i3] & checkPkcs1Encoding));
            i3++;
        }
    }

    private byte[] decodeBlock(byte[] bArr, int i, int i2) throws InvalidCipherTextException {
        byte b;
        if (this.pLen != -1) {
            return decodeBlockOrRandom(bArr, i, i2);
        }
        byte[] processBlock = this.engine.processBlock(bArr, i, i2);
        if (processBlock.length < getOutputBlockSize()) {
            throw new InvalidCipherTextException("block truncated");
        }
        byte b2 = processBlock[0];
        if (this.forPrivateKey) {
            if (b2 != 2) {
                throw new InvalidCipherTextException("unknown block type");
            }
        } else if (b2 != 1) {
            throw new InvalidCipherTextException("unknown block type");
        }
        if (this.useStrictLength && processBlock.length != this.engine.getOutputBlockSize()) {
            throw new InvalidCipherTextException("block incorrect size");
        }
        int i3 = 1;
        while (i3 != processBlock.length && (b = processBlock[i3]) != 0) {
            if (b2 == 1 && b != -1) {
                throw new InvalidCipherTextException("block padding incorrect");
            }
            i3++;
        }
        int i4 = i3 + 1;
        if (i4 > processBlock.length || i4 < 10) {
            throw new InvalidCipherTextException("no data in block");
        }
        int length = processBlock.length - i4;
        byte[] bArr2 = new byte[length];
        System.arraycopy(processBlock, i4, bArr2, 0, length);
        return bArr2;
    }

    private static int checkPkcs1Encoding(byte[] bArr, int i) {
        int i2 = bArr[0] ^ 2;
        int length = bArr.length;
        int i3 = i + 1;
        for (int i4 = 1; i4 < length - i3; i4++) {
            byte b = bArr[i4];
            int i5 = b | (b >> 1);
            int i6 = i5 | (i5 >> 2);
            i2 |= ((i6 | (i6 >> 4)) & 1) - 1;
        }
        int i7 = bArr[bArr.length - i3] | i2;
        int i8 = i7 | (i7 >> 1);
        int i9 = i8 | (i8 >> 2);
        return ~(((i9 | (i9 >> 4)) & 1) - 1);
    }

    public PKCS1Encoding(AsymmetricBlockCipher asymmetricBlockCipher, byte[] bArr) {
        this.pLen = -1;
        this.fallback = null;
        this.engine = asymmetricBlockCipher;
        this.useStrictLength = useStrict();
        this.fallback = bArr;
        this.pLen = bArr.length;
    }

    public PKCS1Encoding(AsymmetricBlockCipher asymmetricBlockCipher, int i) {
        this.pLen = -1;
        this.fallback = null;
        this.engine = asymmetricBlockCipher;
        this.useStrictLength = useStrict();
        this.pLen = i;
    }

    public PKCS1Encoding(AsymmetricBlockCipher asymmetricBlockCipher) {
        this.pLen = -1;
        this.fallback = null;
        this.engine = asymmetricBlockCipher;
        this.useStrictLength = useStrict();
    }
}