forked from Mirrors/keyoxide-web
277 lines
9.4 KiB
JavaScript
277 lines
9.4 KiB
JavaScript
async function verifySignature(opts) {
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// Init
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const elRes = document.body.querySelector("#result");
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const elResContent = document.body.querySelector("#resultContent");
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let keyData, feedback, signature, verified, valid;
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// Reset feedback
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elRes.innerHTML = "";
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elResContent.innerHTML = "";
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try {
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// Get key data
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keyData = await fetchKeys(opts);
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// Handle missing signature
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if (opts.signature == null) { throw("No signature was provided."); }
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// Try two different methods of signature reading
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let readError = null;
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try {
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signature = await openpgp.message.readArmored(opts.signature);
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} catch(e) {
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readError = e;
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}
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try {
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signature = await openpgp.cleartext.readArmored(opts.signature);
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} catch(e) {
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readError = e;
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}
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if (signature == null) { throw(readError) };
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// Verify the signature
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verified = await openpgp.verify({
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message: signature,
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publicKeys: keyData.publicKey
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});
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valid = verified.signatures[0].valid;
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} catch (e) {
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console.error(e);
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elRes.innerHTML = e;
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elRes.classList.remove('green');
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elRes.classList.add('red');
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return;
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}
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// Init feedback to empty string
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feedback = '';
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// If content was extracted from signature
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if (keyData.sigContent) {
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elResContent.innerHTML = "<strong>Signature content:</strong><br><span style=\"white-space: pre-line\">"+sigContent+"</span>";
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}
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// Provide different feedback depending on key input mode
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if (opts.mode == "signature" && keyData.sigUserId) {
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if (valid) {
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feedback += "The message was signed by the userId extracted from the signature.<br>";
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feedback += 'UserId: '+keyData.sigUserId+'<br>';
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feedback += "Fingerprint: "+keyData.fingerprint+"<br>";
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elRes.classList.remove('red');
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elRes.classList.add('green');
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} else {
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feedback += "The message's signature COULD NOT BE verified using the userId extracted from the signature.<br>";
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feedback += 'UserId: '+keyData.sigUserId+'<br>';
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elRes.classList.remove('green');
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elRes.classList.add('red');
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}
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} else if (opts.mode == "signature" && keyData.sigKeyId) {
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if (valid) {
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feedback += "The message was signed by the keyId extracted from the signature.<br>";
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feedback += 'KeyID: '+keyData.sigKeyId+'<br>';
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feedback += "Fingerprint: "+keyData.fingerprint+"<br><br>";
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feedback += "!!! You should manually verify the fingerprint to confirm the signer's identity !!!";
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elRes.classList.remove('red');
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elRes.classList.add('green');
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} else {
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feedback += "The message's signature COULD NOT BE verified using the keyId extracted from the signature.<br>";
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feedback += 'KeyID: '+keyData.sigKeyId+'<br>';
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elRes.classList.remove('green');
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elRes.classList.add('red');
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}
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} else {
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if (valid) {
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feedback += "The message was signed by the provided key ("+opts.mode+").<br>";
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feedback += "Fingerprint: "+keyData.fingerprint+"<br>";
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elRes.classList.remove('red');
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elRes.classList.add('green');
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} else {
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feedback += "The message's signature COULD NOT BE verified using the provided key ("+opts.mode+").<br>";
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elRes.classList.remove('green');
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elRes.classList.add('red');
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}
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}
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// Display feedback
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elRes.innerHTML = feedback;
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};
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async function encryptMessage(opts) {
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// Init
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const elEnc = document.body.querySelector("#messageEncrypted");
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const elRes = document.body.querySelector("#result");
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let keyData, feedback, message, encrypted;
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// Reset feedback
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elRes.innerHTML = "";
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elEnc.value = "";
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try {
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// Get key data
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keyData = await fetchKeys(opts);
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// Handle missing message
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if (opts.message == null) {
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throw("No message was provided.");
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}
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// Encrypt the message
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encrypted = await openpgp.encrypt({
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message: openpgp.message.fromText(opts.message),
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publicKeys: keyData.publicKey
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});
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} catch (e) {
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console.error(e);
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elRes.innerHTML = e;
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elRes.classList.remove('green');
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elRes.classList.add('red');
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return;
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}
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// Display encrypted data
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elEnc.value = encrypted.data;
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};
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async function fetchKeys(opts) {
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// Init
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let lookupOpts, wkd, hkd, sig, lastPrimarySig;
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let output = {
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publicKey: null,
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user: null,
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notations: null,
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sigKeyId: null,
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sigUserId: null,
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sigContent: null
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};
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// Fetch keys depending on the input mode
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switch (opts.mode) {
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case "plaintext":
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output.publicKey = (await openpgp.key.readArmored(opts.input)).keys[0];
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if (!output.publicKey) {
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throw("Error: No public keys could be fetched from the plaintext input.");
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}
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break;
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case "wkd":
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wkd = new openpgp.WKD();
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lookupOpts = {
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email: opts.input
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};
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output.publicKey = (await wkd.lookup(lookupOpts)).keys[0];
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if (!output.publicKey) {
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throw("Error: No public keys could be fetched using WKD.");
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}
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break;
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case "hkp":
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if (!opts.server) {opts.server = "https://keys.openpgp.org/"};
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hkp = new openpgp.HKP(opts.server);
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lookupOpts = {
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query: opts.input
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};
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output.publicKey = await hkp.lookup(lookupOpts);
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output.publicKey = (await openpgp.key.readArmored(output.publicKey)).keys[0];
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if (!output.publicKey) {
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throw("Error: No public keys could be fetched from the HKP server.");
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}
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break;
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case "signature":
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sig = (await openpgp.signature.readArmored(opts.signature));
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if ('compressed' in sig.packets[0]) {
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sig = sig.packets[0];
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output.sigContent = (await openpgp.stream.readToEnd(await sig.packets[1].getText()));
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};
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output.sigUserId = sig.packets[0].signersUserId;
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output.sigKeyId = (await sig.packets[0].issuerKeyId.toHex());
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if (!opts.server) {opts.server = "https://keys.openpgp.org/"};
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hkp = new openpgp.HKP(opts.server);
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lookupOpts = {
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query: output.sigUserId ? output.sigUserId : output.sigKeyId
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};
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output.publicKey = await hkp.lookup(lookupOpts);
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output.publicKey = (await openpgp.key.readArmored(output.publicKey)).keys[0];
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if (!output.publicKey) {
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throw("Error: No public keys could be extracted from the signature.");
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}
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break;
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}
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// Gather more data about the primary key and user
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output.fingerprint = await output.publicKey.primaryKey.getFingerprint();
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output.user = await output.publicKey.getPrimaryUser();
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lastPrimarySig = output.user.selfCertification;
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output.notations = lastPrimarySig.notations || [];
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return output;
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}
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// General purpose
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let elFormVerify = document.body.querySelector("#form-verify"),
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elFormEncrypt = document.body.querySelector("#form-encrypt");
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if (elFormVerify) {
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elFormVerify.onsubmit = function (evt) {
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evt.preventDefault();
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let opts = {
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signature: null,
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mode: null,
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input: null,
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server: null,
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};
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opts.signature = document.body.querySelector("#signature").value;
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if (document.body.querySelector("#publicKey").value != "") {
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opts.input = document.body.querySelector("#publicKey").value;
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opts.mode = "plaintext";
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} else if (document.body.querySelector("#wkd").value != "") {
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opts.input = document.body.querySelector("#wkd").value;
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opts.mode = "wkd";
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} else if (document.body.querySelector("#hkp_input").value != "") {
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opts.input = document.body.querySelector("#hkp_input").value;
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opts.server = document.body.querySelector("#hkp_server").value;
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opts.mode = "hkp";
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} else {
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opts.mode = "signature";
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}
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verifySignature(opts);
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};
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}
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if (elFormEncrypt) {
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elFormEncrypt.onsubmit = function (evt) {
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evt.preventDefault();
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let opts = {
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message: null,
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mode: null,
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input: null,
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server: null,
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};
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opts.message = document.body.querySelector("#message").value;
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if (document.body.querySelector("#publicKey").value != "") {
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opts.input = document.body.querySelector("#publicKey").value;
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opts.mode = "plaintext";
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} else if (document.body.querySelector("#wkd").value != "") {
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opts.input = document.body.querySelector("#wkd").value;
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opts.mode = "wkd";
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} else if (document.body.querySelector("#hkp_input").value != "") {
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opts.input = document.body.querySelector("#hkp_input").value;
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opts.server = document.body.querySelector("#hkp_server").value;
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opts.mode = "hkp";
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} else {
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opts.mode = "signature";
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}
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encryptMessage(opts);
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};
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}
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