91 lines
3.2 KiB
Java
91 lines
3.2 KiB
Java
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package o;
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import java.security.GeneralSecurityException;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import o.uAf;
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/* loaded from: classes2.dex */
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public final class RxO implements InterfaceC13537fcG {
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private final int b;
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private final int d;
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private final SecretKeySpec e;
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private static uAf.RVV c = uAf.RVV.ALGORITHM_REQUIRES_BORINGCRYPTO;
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private static final ThreadLocal<Cipher> a = new ThreadLocal<Cipher>() { // from class: o.RxO.2
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@Override // java.lang.ThreadLocal
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protected final /* synthetic */ Cipher initialValue() {
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return c();
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}
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private static Cipher c() {
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try {
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return YYT.a.e("AES/CTR/NoPadding");
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} catch (GeneralSecurityException e) {
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throw new IllegalStateException(e);
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}
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}
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};
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public RxO(byte[] bArr, int i) throws GeneralSecurityException {
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if (!c.d()) {
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throw new GeneralSecurityException("Can not use AES-CTR in FIPS-mode, as BoringCrypto module is not available.");
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}
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ifG.e(bArr.length);
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this.e = new SecretKeySpec(bArr, "AES");
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int blockSize = a.get().getBlockSize();
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this.b = blockSize;
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if (i < 12 || i > blockSize) {
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throw new GeneralSecurityException("invalid IV size");
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}
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this.d = i;
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}
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@Override // o.InterfaceC13537fcG
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public final byte[] b(byte[] bArr) throws GeneralSecurityException {
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int length = bArr.length;
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int i = this.d;
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if (length > Integer.MAX_VALUE - i) {
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StringBuilder sb = new StringBuilder("plaintext length can not exceed ");
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sb.append(Integer.MAX_VALUE - this.d);
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throw new GeneralSecurityException(sb.toString());
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}
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byte[] bArr2 = new byte[bArr.length + i];
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byte[] b = YTf.b(i);
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System.arraycopy(b, 0, bArr2, 0, this.d);
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e(bArr, 0, bArr.length, bArr2, this.d, b, true);
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return bArr2;
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}
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@Override // o.InterfaceC13537fcG
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public final byte[] e(byte[] bArr) throws GeneralSecurityException {
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int length = bArr.length;
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int i = this.d;
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if (length < i) {
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throw new GeneralSecurityException("ciphertext too short");
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}
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byte[] bArr2 = new byte[i];
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System.arraycopy(bArr, 0, bArr2, 0, i);
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int length2 = bArr.length;
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int i2 = this.d;
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byte[] bArr3 = new byte[length2 - i2];
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e(bArr, i2, bArr.length - i2, bArr3, 0, bArr2, false);
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return bArr3;
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}
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private void e(byte[] bArr, int i, int i2, byte[] bArr2, int i3, byte[] bArr3, boolean z) throws GeneralSecurityException {
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Cipher cipher = a.get();
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byte[] bArr4 = new byte[this.b];
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System.arraycopy(bArr3, 0, bArr4, 0, this.d);
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IvParameterSpec ivParameterSpec = new IvParameterSpec(bArr4);
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if (z) {
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cipher.init(1, this.e, ivParameterSpec);
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} else {
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cipher.init(2, this.e, ivParameterSpec);
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}
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if (cipher.doFinal(bArr, i, i2, bArr2, i3) != i2) {
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throw new GeneralSecurityException("stored output's length does not match input's length");
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}
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}
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}
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