62 lines
2.3 KiB
Java
62 lines
2.3 KiB
Java
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package org.bouncycastle.crypto.generators;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.Digest;
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import org.bouncycastle.crypto.PBEParametersGenerator;
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import org.bouncycastle.crypto.params.KeyParameter;
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import org.bouncycastle.crypto.params.ParametersWithIV;
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/* loaded from: classes6.dex */
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public class PKCS5S1ParametersGenerator extends PBEParametersGenerator {
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private Digest digest;
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@Override // org.bouncycastle.crypto.PBEParametersGenerator
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public CipherParameters generateDerivedParameters(int i, int i2) {
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int i3 = i / 8;
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int i4 = i2 / 8;
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int i5 = i3 + i4;
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if (i5 <= this.digest.getDigestSize()) {
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byte[] generateDerivedKey = generateDerivedKey();
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return new ParametersWithIV(new KeyParameter(generateDerivedKey, 0, i3), generateDerivedKey, i3, i4);
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}
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StringBuilder sb = new StringBuilder("Can't generate a derived key ");
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sb.append(i5);
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sb.append(" bytes long.");
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throw new IllegalArgumentException(sb.toString());
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}
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@Override // org.bouncycastle.crypto.PBEParametersGenerator
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public CipherParameters generateDerivedParameters(int i) {
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int i2 = i / 8;
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if (i2 <= this.digest.getDigestSize()) {
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return new KeyParameter(generateDerivedKey(), 0, i2);
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}
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StringBuilder sb = new StringBuilder("Can't generate a derived key ");
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sb.append(i2);
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sb.append(" bytes long.");
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throw new IllegalArgumentException(sb.toString());
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}
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@Override // org.bouncycastle.crypto.PBEParametersGenerator
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public CipherParameters generateDerivedMacParameters(int i) {
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return generateDerivedParameters(i);
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}
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private byte[] generateDerivedKey() {
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int digestSize = this.digest.getDigestSize();
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byte[] bArr = new byte[digestSize];
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this.digest.update(this.password, 0, this.password.length);
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this.digest.update(this.salt, 0, this.salt.length);
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this.digest.doFinal(bArr, 0);
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for (int i = 1; i < this.iterationCount; i++) {
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this.digest.update(bArr, 0, digestSize);
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this.digest.doFinal(bArr, 0);
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}
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return bArr;
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}
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public PKCS5S1ParametersGenerator(Digest digest) {
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this.digest = digest;
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}
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}
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