102 lines
3.6 KiB
Java
102 lines
3.6 KiB
Java
package org.bouncycastle.openpgp.operator.jcajce;
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import org.bouncycastle.jcajce.provider.asymmetric.eddsa.EdDSAEngine;
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import org.bouncycastle.jcajce.provider.asymmetric.eddsa.spec.EdDSANamedCurveTable;
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import org.bouncycastle.jcajce.provider.asymmetric.eddsa.spec.EdDSAParameterSpec;
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import org.bouncycastle.openpgp.PGPException;
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import org.bouncycastle.openpgp.PGPPrivateKey;
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import org.bouncycastle.openpgp.PGPRuntimeOperationException;
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import org.bouncycastle.openpgp.operator.PGPContentSigner;
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import org.bouncycastle.openpgp.operator.PGPContentSignerBuilder;
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import java.io.ByteArrayOutputStream;
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import java.io.OutputStream;
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import java.security.*;
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public class EdDsaAuthenticationContentSignerBuilder implements PGPContentSignerBuilder {
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private JcaPGPKeyConverter keyConverter = new JcaPGPKeyConverter();
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private int hashAlgorithm;
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private int keyAlgorithm;
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public EdDsaAuthenticationContentSignerBuilder(int keyAlgorithm, int hashAlgorithm) {
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this.keyAlgorithm = keyAlgorithm;
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this.hashAlgorithm = hashAlgorithm;
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}
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public EdDsaAuthenticationContentSignerBuilder setProvider(Provider provider) {
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keyConverter.setProvider(provider);
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return this;
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}
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public EdDsaAuthenticationContentSignerBuilder setProvider(String providerName) {
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keyConverter.setProvider(providerName);
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return this;
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}
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private Signature createSignature() throws NoSuchAlgorithmException {
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EdDSAParameterSpec spec = EdDSANamedCurveTable.getByName("Ed25519");
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return new EdDSAEngine(MessageDigest.getInstance(spec.getHashAlgorithm()));
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}
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public PGPContentSigner build(final int signatureType, final long keyID, final PrivateKey privateKey)
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throws PGPException {
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Signature signatureEdDsa;
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try {
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signatureEdDsa = createSignature();
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} catch (NoSuchAlgorithmException e) {
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throw new PGPException("unable to create Signature.", e);
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}
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final Signature signature = signatureEdDsa;
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final ByteArrayOutputStream dataOutputStream = new ByteArrayOutputStream();
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try {
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signature.initSign(privateKey);
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} catch (InvalidKeyException e) {
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throw new PGPException("invalid key.", e);
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}
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return new PGPContentSigner() {
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public int getType() {
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return signatureType;
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}
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public int getHashAlgorithm() {
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return hashAlgorithm;
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}
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public int getKeyAlgorithm() {
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return keyAlgorithm;
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}
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public long getKeyID() {
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return keyID;
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}
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public OutputStream getOutputStream() {
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return new SignatureOutputStream(signature);
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}
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public byte[] getSignature() {
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try {
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return signature.sign();
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} catch (SignatureException e) {
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throw new PGPRuntimeOperationException("Unable to create signature: " + e.getMessage(), e);
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}
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}
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public byte[] getDigest() {
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return null;
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}
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};
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}
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public PGPContentSigner build(final int signatureType, PGPPrivateKey privateKey) throws PGPException {
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if (privateKey instanceof JcaPGPPrivateKey) {
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return build(signatureType, privateKey.getKeyID(), ((JcaPGPPrivateKey) privateKey).getPrivateKey());
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} else {
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return build(signatureType, privateKey.getKeyID(), keyConverter.getPrivateKey(privateKey));
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}
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}
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}
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