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Kotlin conversion: EncryptExternal
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2 changed files with 111 additions and 160 deletions
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package sop.external.operation;
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import sop.EncryptionResult;
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import sop.ReadyWithResult;
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import sop.SessionKey;
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import sop.enums.EncryptAs;
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import sop.exception.SOPGPException;
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import sop.external.ExternalSOP;
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import sop.operation.Encrypt;
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import javax.annotation.Nonnull;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Properties;
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/**
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* Implementation of the {@link Encrypt} operation using an external SOP binary.
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*/
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public class EncryptExternal implements Encrypt {
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private final ExternalSOP.TempDirProvider tempDirProvider;
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private final List<String> commandList = new ArrayList<>();
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private final List<String> envList;
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private int SIGN_WITH_COUNTER = 0;
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private int KEY_PASSWORD_COUNTER = 0;
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private int PASSWORD_COUNTER = 0;
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private int CERT_COUNTER = 0;
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public EncryptExternal(String binary, Properties environment, ExternalSOP.TempDirProvider tempDirProvider) {
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this.tempDirProvider = tempDirProvider;
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this.commandList.add(binary);
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this.commandList.add("encrypt");
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this.envList = ExternalSOP.propertiesToEnv(environment);
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}
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@Override
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@Nonnull
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public Encrypt noArmor() {
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this.commandList.add("--no-armor");
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return this;
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}
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@Override
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@Nonnull
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public Encrypt mode(@Nonnull EncryptAs mode)
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throws SOPGPException.UnsupportedOption {
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this.commandList.add("--as=" + mode);
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return this;
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}
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@Override
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@Nonnull
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public Encrypt signWith(@Nonnull InputStream key)
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throws SOPGPException.KeyCannotSign, SOPGPException.UnsupportedAsymmetricAlgo, SOPGPException.BadData,
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IOException {
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String envVar = "SIGN_WITH_" + SIGN_WITH_COUNTER++;
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commandList.add("--sign-with=@ENV:" + envVar);
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envList.add(envVar + "=" + ExternalSOP.readString(key));
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return this;
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}
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@Override
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@Nonnull
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public Encrypt withKeyPassword(@Nonnull byte[] password)
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throws SOPGPException.PasswordNotHumanReadable, SOPGPException.UnsupportedOption {
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String envVar = "KEY_PASSWORD_" + KEY_PASSWORD_COUNTER++;
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commandList.add("--with-key-password=@ENV:" + envVar);
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envList.add(envVar + "=" + new String(password));
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return this;
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}
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@Override
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@Nonnull
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public Encrypt withPassword(@Nonnull String password)
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throws SOPGPException.PasswordNotHumanReadable, SOPGPException.UnsupportedOption {
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String envVar = "PASSWORD_" + PASSWORD_COUNTER++;
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commandList.add("--with-password=@ENV:" + envVar);
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envList.add(envVar + "=" + password);
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return this;
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}
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@Override
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@Nonnull
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public Encrypt withCert(@Nonnull InputStream cert)
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throws SOPGPException.CertCannotEncrypt, SOPGPException.UnsupportedAsymmetricAlgo, SOPGPException.BadData,
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IOException {
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String envVar = "CERT_" + CERT_COUNTER++;
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commandList.add("@ENV:" + envVar);
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envList.add(envVar + "=" + ExternalSOP.readString(cert));
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return this;
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}
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@Override
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@Nonnull
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public Encrypt profile(@Nonnull String profileName) {
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commandList.add("--profile=" + profileName);
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return this;
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}
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@Override
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@Nonnull
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public ReadyWithResult<EncryptionResult> plaintext(@Nonnull InputStream plaintext)
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throws SOPGPException.KeyIsProtected, IOException {
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File tempDir = tempDirProvider.provideTempDirectory();
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File sessionKeyOut = new File(tempDir, "session-key-out");
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sessionKeyOut.delete();
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commandList.add("--session-key-out=" + sessionKeyOut.getAbsolutePath());
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String[] command = commandList.toArray(new String[0]);
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String[] env = envList.toArray(new String[0]);
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try {
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Process process = Runtime.getRuntime().exec(command, env);
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OutputStream processOut = process.getOutputStream();
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InputStream processIn = process.getInputStream();
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return new ReadyWithResult<EncryptionResult>() {
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@Override
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public EncryptionResult writeTo(@Nonnull OutputStream outputStream) throws IOException {
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byte[] buf = new byte[4096];
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int r;
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while ((r = plaintext.read(buf)) > 0) {
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processOut.write(buf, 0, r);
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}
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plaintext.close();
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processOut.close();
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while ((r = processIn.read(buf)) > 0) {
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outputStream.write(buf, 0 , r);
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}
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processIn.close();
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outputStream.close();
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ExternalSOP.finish(process);
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FileInputStream sessionKeyOutIn = new FileInputStream(sessionKeyOut);
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String line = ExternalSOP.readString(sessionKeyOutIn);
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SessionKey sessionKey = SessionKey.fromString(line.trim());
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sessionKeyOutIn.close();
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sessionKeyOut.delete();
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return new EncryptionResult(sessionKey);
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}
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};
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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}
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111
external-sop/src/main/kotlin/sop/external/operation/EncryptExternal.kt
vendored
Normal file
111
external-sop/src/main/kotlin/sop/external/operation/EncryptExternal.kt
vendored
Normal file
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@ -0,0 +1,111 @@
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package sop.external.operation
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import java.io.File
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import java.io.FileInputStream
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import java.io.IOException
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import java.io.InputStream
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import java.io.OutputStream
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import java.util.*
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import sop.EncryptionResult
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import sop.ReadyWithResult
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import sop.SessionKey.Companion.fromString
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import sop.enums.EncryptAs
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import sop.external.ExternalSOP
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import sop.external.ExternalSOP.Companion.finish
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import sop.external.ExternalSOP.Companion.readString
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import sop.operation.Encrypt
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/** Implementation of the [Encrypt] operation using an external SOP binary. */
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class EncryptExternal(
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binary: String,
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environment: Properties,
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private val tempDirProvider: ExternalSOP.TempDirProvider
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) : Encrypt {
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private val commandList = mutableListOf(binary, "encrypt")
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private val envList = ExternalSOP.propertiesToEnv(environment).toMutableList()
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private var argCounter = 0
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override fun noArmor(): Encrypt = apply { commandList.add("--no-armor") }
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override fun mode(mode: EncryptAs): Encrypt = apply { commandList.add("--as=$mode") }
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override fun signWith(key: InputStream): Encrypt = apply {
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commandList.add("--sign-with@ENV:SIGN_WITH_$argCounter")
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envList.add("SIGN_WITH_$argCounter=${ExternalSOP.readString(key)}")
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argCounter += 1
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}
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override fun withKeyPassword(password: ByteArray): Encrypt = apply {
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commandList.add("--with-key-password=@ENV:KEY_PASSWORD_$argCounter")
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envList.add("KEY_PASSWORD_$argCounter=${String(password)}")
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argCounter += 1
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}
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override fun withPassword(password: String): Encrypt = apply {
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commandList.add("--with-password=@ENV:PASSWORD_$argCounter")
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envList.add("PASSWORD_$argCounter=$password")
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argCounter += 1
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}
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override fun withCert(cert: InputStream): Encrypt = apply {
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commandList.add("@ENV:CERT_$argCounter")
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envList.add("CERT_$argCounter=${readString(cert)}")
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argCounter += 1
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}
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override fun profile(profileName: String): Encrypt = apply {
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commandList.add("--profile=$profileName")
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}
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override fun plaintext(plaintext: InputStream): ReadyWithResult<EncryptionResult> {
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val tempDir = tempDirProvider.provideTempDirectory()
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val sessionKeyOut = File(tempDir, "session-key-out")
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sessionKeyOut.delete()
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commandList.add("--session-key-out=${sessionKeyOut.absolutePath}")
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try {
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val process =
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Runtime.getRuntime().exec(commandList.toTypedArray(), envList.toTypedArray())
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val processOut = process.outputStream
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val processIn = process.inputStream
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return object : ReadyWithResult<EncryptionResult>() {
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override fun writeTo(outputStream: OutputStream): EncryptionResult {
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val buf = ByteArray(4096)
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var r: Int
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while (plaintext.read(buf).also { r = it } > 0) {
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processOut.write(buf, 0, r)
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}
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plaintext.close()
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processOut.close()
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while (processIn.read(buf).also { r = it } > 0) {
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outputStream.write(buf, 0, r)
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}
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processIn.close()
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outputStream.close()
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finish(process)
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val sessionKeyOutIn = FileInputStream(sessionKeyOut)
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val line = readString(sessionKeyOutIn)
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val sessionKey = fromString(line.trim())
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sessionKeyOutIn.close()
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sessionKeyOut.delete()
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return EncryptionResult(sessionKey)
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}
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}
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} catch (e: IOException) {
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throw RuntimeException(e)
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}
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}
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}
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