42 lines
1.6 KiB
Java
42 lines
1.6 KiB
Java
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package org.bouncycastle.crypto.parsers;
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import java.io.IOException;
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import java.io.InputStream;
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import org.bouncycastle.crypto.KeyParser;
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import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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import org.bouncycastle.crypto.params.ECDomainParameters;
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import org.bouncycastle.crypto.params.ECPublicKeyParameters;
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import org.bouncycastle.util.io.Streams;
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/* loaded from: classes6.dex */
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public class ECIESPublicKeyParser implements KeyParser {
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private ECDomainParameters ecParams;
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@Override // org.bouncycastle.crypto.KeyParser
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public AsymmetricKeyParameter readKey(InputStream inputStream) throws IOException {
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int fieldSize;
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int read = inputStream.read();
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if (read == 0) {
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throw new IOException("Sender's public key invalid.");
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}
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if (read == 2 || read == 3) {
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fieldSize = (this.ecParams.getCurve().getFieldSize() + 7) / 8;
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} else {
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if (read != 4 && read != 6 && read != 7) {
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StringBuilder sb = new StringBuilder("Sender's public key has invalid point encoding 0x");
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sb.append(Integer.toString(read, 16));
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throw new IOException(sb.toString());
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}
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fieldSize = ((this.ecParams.getCurve().getFieldSize() + 7) / 8) << 1;
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}
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byte[] bArr = new byte[fieldSize + 1];
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bArr[0] = (byte) read;
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Streams.readFully(inputStream, bArr, 1, bArr.length - 1);
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return new ECPublicKeyParameters(this.ecParams.getCurve().decodePoint(bArr), this.ecParams);
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}
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public ECIESPublicKeyParser(ECDomainParameters eCDomainParameters) {
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this.ecParams = eCDomainParameters;
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}
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}
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