keyoxide-web/static/scripts.js

/*
Copyright (C) 2021 Yarmo Mackenbach

This program is free software: you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
details.

You should have received a copy of the GNU Affero General Public License along
with this program. If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If your software can interact with users remotely through a computer network,
you should also make sure that it provides a way for users to get its source.
For example, if your program is a web application, its interface could display
a "Source" link that leads users to an archive of the code. There are many
ways you could offer source, and different solutions will be better for different
programs; see section 13 for the specific requirements.

You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary. For
more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.
*/
async function verifySignature(opts) {
    // Init
    const elRes = document.body.querySelector("#result");
    const elResContent = document.body.querySelector("#resultContent");
    let keyData, feedback, signature, verified, valid;

    // Reset feedback
    elRes.innerHTML = "";
    elRes.classList.remove('green');
    elRes.classList.remove('red');
    elResContent.innerHTML = "";

    try {
        // Get key data
        keyData = await fetchKeys(opts);

        // Handle missing signature
        if (opts.signature == null) { throw("No signature was provided."); }

        // Try two different methods of signature reading
        let readError = null;
        try {
            signature = await openpgp.message.readArmored(opts.signature);
        } catch(e) {
            readError = e;
        }
        try {
            signature = await openpgp.cleartext.readArmored(opts.signature);
        } catch(e) {
            readError = e;
        }
        if (signature == null) { throw(readError) };

        // Verify the signature
        verified = await openpgp.verify({
            message: signature,
            publicKeys: keyData.publicKey
        });
        valid = verified.signatures[0].valid;
    } catch (e) {
        console.error(e);
        elRes.innerHTML = e;
        elRes.classList.remove('green');
        elRes.classList.add('red');
        return;
    }

    // Init feedback to empty string
    feedback = '';

    // If content was extracted from signature
    if (keyData.sigContent) {
        elResContent.innerHTML = "<strong>Signature content:</strong><br><span style=\"white-space: pre-line\">"+sigContent+"</span>";
    }

    // Provide different feedback depending on key input mode
    if (opts.mode == "signature" && keyData.sigUserId) {
        if (valid) {
            feedback += "The message was signed by the userId extracted from the signature.<br>";
            feedback += 'UserId: '+keyData.sigUserId+'<br>';
            feedback += "Fingerprint: "+keyData.fingerprint+"<br>";
            elRes.classList.remove('red');
            elRes.classList.add('green');
        } else {
            feedback += "The message's signature COULD NOT BE verified using the userId extracted from the signature.<br>";
            feedback += 'UserId: '+keyData.sigUserId+'<br>';
            elRes.classList.remove('green');
            elRes.classList.add('red');
        }
    } else if (opts.mode == "signature" && keyData.sigKeyId) {
        if (valid) {
            feedback += "The message was signed by the keyId extracted from the signature.<br>";
            feedback += 'KeyID: '+keyData.sigKeyId+'<br>';
            feedback += "Fingerprint: "+keyData.fingerprint+"<br><br>";
            feedback += "!!! You should manually verify the fingerprint to confirm the signer's identity !!!";
            elRes.classList.remove('red');
            elRes.classList.add('green');
        } else {
            feedback += "The message's signature COULD NOT BE verified using the keyId extracted from the signature.<br>";
            feedback += 'KeyID: '+keyData.sigKeyId+'<br>';
            elRes.classList.remove('green');
            elRes.classList.add('red');
        }
    } else {
        if (valid) {
            feedback += "The message was signed by the provided key ("+opts.mode+").<br>";
            feedback += "Fingerprint: "+keyData.fingerprint+"<br>";
            elRes.classList.remove('red');
            elRes.classList.add('green');
        } else {
            feedback += "The message's signature COULD NOT BE verified using the provided key ("+opts.mode+").<br>";
            elRes.classList.remove('green');
            elRes.classList.add('red');
        }
    }

    // Display feedback
    elRes.innerHTML = feedback;
};

async function encryptMessage(opts) {
    // Init
    const elEnc = document.body.querySelector("#message");
    const elRes = document.body.querySelector("#result");
    const elBtn = document.body.querySelector("[name='submit']");
    let keyData, feedback, message, encrypted;

    // Reset feedback
    elRes.innerHTML = "";
    elRes.classList.remove('green');
    elRes.classList.remove('red');

    try {
        // Get key data
        keyData = await fetchKeys(opts);

        // Handle missing message
        if (opts.message == null) {
            throw("No message was provided.");
        }

        // Encrypt the message
        encrypted = await openpgp.encrypt({
            message: openpgp.message.fromText(opts.message),
            publicKeys: keyData.publicKey
        });
    } catch (e) {
        console.error(e);
        elRes.innerHTML = e;
        elRes.classList.remove('green');
        elRes.classList.add('red');
        return;
    }

    // Display encrypted data
    elEnc.value = encrypted.data;
    elEnc.toggleAttribute("readonly");
    elBtn.setAttribute("disabled", "true");
};

// async function verifyProofs(opts) {
//     // Init
//     const elRes = document.body.querySelector("#result");
//     let keyData, feedback = "", message, encrypted;

//     // Reset feedback
//     elRes.innerHTML = "";
//     elRes.classList.remove('green');
//     elRes.classList.remove('red');

//     try {
//         // Get key data
//         keyData = await fetchKeys(opts);
//     } catch (e) {
//         console.error(e);
//         elRes.innerHTML = e;
//         elRes.classList.remove('green');
//         elRes.classList.add('red');
//         return;
//     }

//     let notations = [], notationsRaw = [];
//     for (var i = 0; i < keyData.publicKey.users.length; i++) {
//         notationsRaw = notationsRaw.concat(keyData.publicKey.users[i].selfCertifications[0].notations);
//     }
//     notationsRaw.forEach((item, i) => {
//         if (item[0] == "proof@metacode.biz") {
//             notations.push(item[1]);
//         }
//     });
//     notations = Array.from(new Set(notations)); // Deduplicate (ES6)

//     // Display feedback
//     elRes.innerHTML = "Verifying proofs&hellip;";

//     let notation, isVerified, verifications = [];
//     for (var i = 0; i < notations.length; i++) {
//         notation = notations[i];
//         verifications.push(await verifyProof(notation, keyData.fingerprint));
//     }

//     // One-line sorting function (order verifications by type)
//     verifications = verifications.sort((a,b) => (a.type > b.type) ? 1 : ((b.type > a.type) ? -1 : 0));

//     // Generate feedback
//     feedback += `<p>`;
//     for (var i = 0; i < verifications.length; i++) {
//         if (verifications[i].type == null) { continue; }
//         feedback += `${verifications[i].type}: `;
//         feedback += `<a class="proofDisplay" href="${verifications[i].url}" rel="me">${verifications[i].display}</a>`;
//         if (verifications[i].isVerified) {
//             feedback += `<a class="proofUrl proofUrl--verified" href="${verifications[i].proofUrl}">verified &#10004;</a>`;
//         } else {
//             feedback += `<a class="proofUrl" href="${verifications[i].proofUrl}">unverified</a>`;
//         }
//         feedback += `<br>`;
//     }
//     feedback += `</p>`;

//     // Display feedback
//     elRes.innerHTML = feedback;
// }

async function displayProfile(opts) {
    /// UTILITY FUNCTIONS
    // Sort claims by name and filter for errors
    const sortClaims = (claims) => {
        claims = claims.filter((a) => (a && a.errors.length == 0 && a.serviceproviderData));
        claims = claims.sort((a,b) => (a.serviceproviderData.serviceprovider.name > b.serviceproviderData.serviceprovider.name) ? 1 : ((b.serviceproviderData.serviceprovider.name > a.serviceproviderData.serviceprovider.name) ? -1 : 0));
        return claims;
    }
    // Find the primary claims
    const getPrimaryClaims = (primaryUserId, userIds, verifications) => {
        let primaryClaims = null;
        userIds.forEach((userId, i) => {
            if (!primaryClaims && userId.userId && userId.userId.email === primaryUserId.email) {
                primaryClaims = sortClaims(verifications[i]);
            }
        });
        return primaryClaims;
    }
    // Generate a HTML string for the profile header
    const generateProfileHeaderHTML = (data) => {
        if (!data) {
            data = {
                profileHide: true,
                name: '',
                fingerprint: '',
                key: {
                    url: '',
                    mode: '',
                    server: '',
                    id: '',
                },
                avatarURL: '/static/img/avatar_placeholder.png',
            }
        }

        // TODO Add support for custom HKP server
        return `
            <div class="profile__avatar" style="${data.profileHide ? "display='none" : ''}">
                <a class="avatar" href="#">
                    <img id="profileAvatar" src="${data.avatarURL}" alt="avatar">
                </a>
            </div>
            <div class="profile__description" style="${data.profileHide ? "display='none" : ''}">
                <p id="profileName">${data.name}</p>
                <p id="profileURLFingerprint">
                    <a href="${data.key.url}">${data.fingerprint}</a>
                </p>
                <div class="buttons">
                    <a href="/encrypt/${data.key.mode}/${data.key.id}">Encrypt message</a>
                    <a href="/verify/${data.key.mode}/${data.key.id}">Verify signature</a>
                </div>
            </div>
        `;
    }
    // Generate a HTML string for each userId and associated claims
    const generateProfileUserIdHTML = (userId, claims, opts) => {
        // Init output
        let output = '';

        // Add claim header to output
        output += `<h2>${userId.email}${opts.isPrimary ? ' <small class="primary">primary</small>' : ''}</h2>`;

        // Handle claims identical to primary
        if ('isIdenticalToPrimary' in opts && opts.isIdenticalToPrimary) {

            output += `
                <div class="claim">
                    <div class="claim__main">
                        <div class="claim__description">
                            <p>Identical to primary claims</p>
                        </div>
                    </div>
                </div>
            `;
            return output;
        }

        // Handle "no claims"
        if (claims.length == 0) {
            output += `
                <div class="claim">
                    <div class="claim__main">
                        <div class="claim__description">
                            <p>No claims associated</p>
                        </div>
                    </div>
                </div>
            `;
            return output;
        }

        claims = sortClaims(claims);

        //  Generate output for each claim
        claims.forEach((claim, i) => {
            const claimData = claim.serviceproviderData
            if (!claimData.serviceprovider.name) {
                return;
            }

            output += `
                <div class="claim">
                    <div class="claim__main">
                        <div class="claim__description">
                            <p>${claimData.profile.display}</p>
                        </div>
                        <div class="claim__links">
                            <p>
                                <span>${capitalizeLetteredServices(claimData.serviceprovider.name)}</span>
                                <a href="${claimData.profile.uri}">View&nbsp;account</a>
                                <a href="${claimData.proof.uri}">View&nbsp;proof</a>
                                <a href="#">Details</a>
                            </p>
                        </div>
                    </div>
                    <div class="claim__verification claim__verification--${claim.isVerified ? "true" : "false"}">${claim.isVerified ? "✔" : "✕"}</div>
                </div>
            `;
            // if (claim.isVerified && claimData.profile.qr) {
            //     feedback += `<a class="proofQR green" href="/util/qr/${encodeURIComponent(claimData.profile.qr)}" target="_blank" title="QR Code">${icon_qr}</a>`;
            // }
        })

        return output;
    }

    /// MAIN
    // Init variables
    let keyData, keyLink, sigVerification, sigKeyUri, fingerprint, feedback = "", verifications = [];
    let icon_qr = '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="#ffffff" d="M3,11H5V13H3V11M11,5H13V9H11V5M9,11H13V15H11V13H9V11M15,11H17V13H19V11H21V13H19V15H21V19H19V21H17V19H13V21H11V17H15V15H17V13H15V11M19,19V15H17V19H19M15,3H21V9H15V3M17,5V7H19V5H17M3,3H9V9H3V3M5,5V7H7V5H5M3,15H9V21H3V15M5,17V19H7V17H5Z" /></svg>';

    const doipOpts = {
        proxyPolicy: 'adaptive',
    }

    // Reset the avatar
    document.body.querySelector('#profileHeader').src = generateProfileHeaderHTML(null)

    if (opts.mode == 'sig') {
        try {
            sigVerification = await doip.signatures.verify(opts.input, doipOpts);
            keyData = sigVerification.publicKey.data;
            fingerprint = sigVerification.publicKey.fingerprint;
        } catch (e) {
            feedback += `<p>There was a problem reading the signature.</p>`;
            if ('errors' in e) {
                feedback += `<code>${e.errors.join(', ')}</code>`;
            } else {
                feedback += `<code>${e}</code>`;
            }
            document.body.querySelector('#profileData').innerHTML = feedback;
            document.body.querySelector('#profileName').innerHTML = "Could not load profile";
            return;
        }
    } else {
        try {
            let keyURI;
            if (opts.mode === 'hkp' && opts.server) {
                keyURI = `${opts.mode}:${opts.server}:${opts.input}`
            } else {
                keyURI = `${opts.mode}:${opts.input}`
            }
            keyData = await doip.keys.fetch.uri(keyURI);
            fingerprint = keyData.keyPacket.getFingerprint();
        } catch (e) {
            feedback += `<p>There was a problem fetching the keys.</p>`;
            feedback += `<code>${e}</code>`;
            document.body.querySelector('#profileData').innerHTML = feedback;
            document.body.querySelector('#profileName').innerHTML = "Could not load profile";
            return;
        }
    }

    // Get data of primary userId
    const userPrimary = await keyData.getPrimaryUser();
    const userData = userPrimary.user.userId;
    const userName = userData.name ? userData.name : userData.email;
    const userMail = userData.email ? userData.email : null;

    // TODO Get image from user attribute
    let imgUri = null;

    // Determine WKD or HKP link
    let keyUriMode = opts.mode;
    let keyUriServer = null;
    let keyUriId = opts.input;
    if (opts.mode === 'sig') {
        const keyUriMatch = sigVerification.publicKey.uri.match(/([^:]*)(?:\:(.*))?:(.*)/);
        keyUriMode = keyUriMatch[1];
        keyUriServer = keyUriMatch[2];
        keyUriId = keyUriMatch[3];
    }

    switch (keyUriMode) {
        case "wkd":
            const [, localPart, domain] = /(.*)@(.*)/.exec(keyUriId);
            const localEncoded = await computeWKDLocalPart(localPart.toLowerCase());
            const urlAdvanced = `https://openpgpkey.${domain}/.well-known/openpgpkey/${domain}/hu/${localEncoded}`;
            const urlDirect = `https://${domain}/.well-known/openpgpkey/hu/${localEncoded}`;

            try {
                keyLink = await fetch(urlAdvanced).then(function(response) {
                    if (response.status === 200) {
                        return urlAdvanced;
                    }
                });
            } catch (e) {
                console.warn(e);
            }
            if (!keyLink) {
                try {
                    keyLink = await fetch(urlDirect).then(function(response) {
                        if (response.status === 200) {
                            return urlDirect;
                        }
                    });
                } catch (e) {
                    console.warn(e);
                }
            }
            if (!keyLink) {
                keyLink = `https://${keyUriServer ? keyUriServer : 'keys.openpgp.org'}/pks/lookup?op=get&options=mr&search=0x${fingerprint}`;
            }
            break;

        case "hkp":
            keyLink = `https://${keyUriServer ? keyUriServer : 'keys.openpgp.org'}/pks/lookup?op=get&options=mr&search=0x${fingerprint}`;
            break;

        case "keybase":
            keyLink = opts.keyLink;
            break;
    }

    // Generate profile header
    const profileHash = openpgp.util.str_to_hex(openpgp.util.Uint8Array_to_str(await openpgp.crypto.hash.md5(openpgp.util.str_to_Uint8Array(userData.email))));
    document.body.querySelector('#profileHeader').innerHTML = generateProfileHeaderHTML({
        profileHide: false,
        name: userName,
        fingerprint: fingerprint,
        key: {
            url: keyLink,
            mode: keyUriMode,
            server: keyUriServer,
            id: keyUriId,
        },
        avatarURL: imgUri ? imgUri : `https://www.gravatar.com/avatar/${profileHash}?s=128&d=mm`
    })
    document.title = `${userName} - Keyoxide`;

    try {
        if (sigVerification) {
            verifications = sigVerification.claims
        } else {
            verifications = await doip.claims.verify(keyData, fingerprint, doipOpts)
        }
    } catch (e) {
        feedback += `<p>There was a problem verifying the claims.</p>`;
        feedback += `<code>${e}</code>`;
        document.body.querySelector('#profileData').innerHTML = feedback;
        document.body.querySelector('#profileName').innerHTML = "Could not load profile";
        return;
    }

    // Exit if no notations are available
    if (verifications.length == 0) {
        return;
    }

    feedback = "";

    if (opts.mode === 'sig') {
        const claims = sortClaims(verifications);
        feedback += generateProfileUserIdHTML(userData, claims, {isPrimary: false});

        // feedback += `<div class="profileDataItem profileDataItem--separator profileDataItem--noLabel">`;
        // feedback += `<div class="profileDataItem__label"></div>`;
        // feedback += `<div class="profileDataItem__value">proofs</div>`;
        // feedback += `</div>`;

        // verifications = verifications.filter((a) => (a && a.errors.length == 0 && a.serviceproviderData))
        // verifications = verifications.sort((a,b) => (a.serviceproviderData.serviceprovider.name > b.serviceproviderData.serviceprovider.name) ? 1 : ((b.serviceproviderData.serviceprovider.name > a.serviceproviderData.serviceprovider.name) ? -1 : 0));

        // verifications.forEach((claim, i) => {
        //     const claimData = claim.serviceproviderData;
        //     if (!claimData.serviceprovider.name) {
        //         return;
        //     }
        //     feedback += `<div class="profileDataItem">`;
        //     feedback += `<div class="profileDataItem__label">${capitalizeLetteredServices(claimData.serviceprovider.name)}</div>`;
        //     feedback += `<div class="profileDataItem__value">`;
        //     feedback += `<a class="proofDisplay" href="${claimData.profile.uri}"  rel="me">${claimData.profile.display}</a>`;
        //     if (claim.isVerified) {
        //         feedback += `<a class="proofUrl proofUrl--verified" href="${claimData.proof.uri}">verified &#10004;</a>`;
        //     } else {
        //         feedback += `<a class="proofUrl" href="${claimData.proof.uri}">unverified</a>`;
        //     }
        //     if (claim.isVerified && claimData.profile.qr) {
        //         feedback += `<a class="proofQR green" href="/util/qr/${encodeURIComponent(claimData.profile.qr)}" target="_blank" title="QR Code">${icon_qr}</a>`;
        //     }
        //     feedback += `</div>`;
        //     feedback += `</div>`;
        // });
    } else {
        const primaryClaims = getPrimaryClaims(userData, keyData.users, verifications);
        feedback += generateProfileUserIdHTML(userData, primaryClaims, {isPrimary: true});

        keyData.users.forEach((user, i) => {
            if (!user.userId || userData.email && user.userId && user.userId.email === userData.email) {
                return;
            }

            const claims = sortClaims(verifications[i])
            const opts = {
                isPrimary: false,
                isIdenticaltoPrimary: primaryClaims && primaryClaims.toString() === claims.toString()
            }

            feedback += generateProfileUserIdHTML(user.userId, claims, opts);
        })
    }

    feedback += `
        <p class="subtle-links">
            <a href="#">What is this?</a>
            <a href="#">Perform local verification</a>
        </p>`;

    // Display feedback
    document.body.querySelector('#profileProofs').innerHTML = feedback;
}

// async function verifyProof(url, fingerprint) {
//     // Init
//     let reVerify, match, output = {url: url, type: null, proofUrl: url, proofUrlFetch: null, isVerified: false, display: null, qr: null};

//     try {
//         // DNS
//         if (/^dns:/.test(url)) {
//             output.type = "domain";
//             output.display = url.replace(/dns:/, '').replace(/\?type=TXT/, '');
//             output.proofUrl = `https://dns.shivering-isles.com/dns-query?name=${output.display}&type=TXT`;
//             output.proofUrlFetch = output.proofUrl;
//             output.url = `https://${output.display}`;

//             try {
//                 response = await fetch(output.proofUrlFetch, {
//                     headers: {
//                         Accept: 'application/json'
//                     },
//                     credentials: 'omit'
//                 });
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 reVerify = new RegExp(`openpgp4fpr:${fingerprint}`, 'i');
//                 json.Answer.forEach((item, i) => {
//                     if (reVerify.test(item.data)) {
//                         output.isVerified = true;
//                     }
//                 });
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // XMPP
//         if (/^xmpp:/.test(url)) {
//             output.type = "xmpp";
//             match = url.match(/xmpp:([a-zA-Z0-9\.\-\_]*)@([a-zA-Z0-9\.\-\_]*)(?:\?(.*))?/);
//             output.display = `${match[1]}@${match[2]}`;
//             output.proofUrl = `https://PLACEHOLDER__XMPP_VCARD_SERVER_DOMAIN/api/vcard/${output.display}/DESC`;
//             output.qr = url;

//             try {
//                 response = await fetchWithTimeout(output.proofUrl);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 reVerify = new RegExp(`[Verifying my OpenPGP key: openpgp4fpr:${fingerprint}]`, 'i');
//                 if (reVerify.test(json)) {
//                     output.isVerified = true;
//                 }
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Twitter
//         if (/^https:\/\/twitter.com/.test(url)) {
//             output.type = "twitter";
//             match = url.match(/https:\/\/twitter\.com\/(.*)\/status\/([0-9]*)(?:\?.*)?/);
//             output.display = `@${match[1]}`;
//             output.url = `https://twitter.com/${match[1]}`;
//             output.proofUrlFetch = `/server/verify/twitter
// ?tweetId=${encodeURIComponent(match[2])}
// &account=${encodeURIComponent(match[1])}
// &fingerprint=${fingerprint}`;
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 output.isVerified = json.isVerified;
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // HN
//         if (/^https:\/\/news.ycombinator.com/.test(url)) {
//             output.type = "hackernews";
//             match = url.match(/https:\/\/news.ycombinator.com\/user\?id=(.*)/);
//             output.display = match[1];
//             output.proofUrl = `https://hacker-news.firebaseio.com/v0/user/${match[1]}.json`;
//             output.proofUrlFetch = output.proofUrl;
//             try {
//                 response = await fetch(output.proofUrlFetch, {
//                     headers: {
//                         Accept: 'application/json'
//                     },
//                     credentials: 'omit'
//                 });
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 reVerify = new RegExp(`openpgp4fpr:${fingerprint}`, 'i');
//                 if (reVerify.test(json.about)) {
//                     output.isVerified = true;
//                 }
//             } catch (e) {
//             }

//             if (!output.isVerified) {
//                 output.proofUrlFetch = `/server/verify/proxy
// ?url=${encodeURIComponent(output.proofUrl)}
// &fingerprint=${fingerprint}
// &checkRelation=contains
// &checkPath=about
// &checkClaimFormat=message`;
//                 try {
//                     response = await fetch(output.proofUrlFetch);
//                     if (!response.ok) {
//                         throw new Error('Response failed: ' + response.status);
//                     }
//                     json = await response.json();
//                     output.isVerified = json.verified;
//                 } catch (e) {
//                 }
//             }
//             return output;
//         }
//         // dev.to
//         if (/^https:\/\/dev\.to\//.test(url)) {
//             output.type = "dev.to";
//             match = url.match(/https:\/\/dev\.to\/(.*)\/(.*)/);
//             output.display = match[1];
//             output.url = `https://dev.to/${match[1]}`;
//             output.proofUrlFetch = `https://dev.to/api/articles/${match[1]}/${match[2]}`;
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 reVerify = new RegExp(`[Verifying my OpenPGP key: openpgp4fpr:${fingerprint}]`, 'i');
//                 if (reVerify.test(json.body_markdown)) {
//                     output.isVerified = true;
//                 }
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Reddit
//         if (/^https:\/\/(?:www\.)?reddit\.com\/user/.test(url)) {
//             output.type = "reddit";
//             match = url.match(/https:\/\/(?:www\.)?reddit\.com\/user\/(.*)\/comments\/(.*)\/([^/]*)/);
//             output.display = match[1];
//             output.url = `https://www.reddit.com/user/${match[1]}`;
//             output.proofUrl = `https://www.reddit.com/user/${match[1]}/comments/${match[2]}.json`;
//             output.proofUrlFetch = `/server/verify/proxy
// ?url=${encodeURIComponent(output.proofUrl)}
// &fingerprint=${fingerprint}
// &checkRelation=contains
// &checkPath=data,children,data,selftext
// &checkClaimFormat=message`;
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 output.isVerified = json.isVerified;
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Gitea
//         if (/\/gitea_proof$/.test(url)) {
//             output.type = "gitea";
//             match = url.match(/https:\/\/(.*)\/(.*)\/gitea_proof/);
//             output.display = `${match[2]}@${match[1]}`;
//             output.url = `https://${match[1]}/${match[2]}`;
//             output.proofUrl = `https://${match[1]}/api/v1/repos/${match[2]}/gitea_proof`;
//             output.proofUrlFetch = `/server/verify/proxy
// ?url=${encodeURIComponent(output.proofUrl)}
// &fingerprint=${fingerprint}
// &checkRelation=eq
// &checkPath=description
// &checkClaimFormat=message`;
//             output.proofUrl = url; // Actually set the proof URL to something user-friendly
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 output.isVerified = json.isVerified;
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Github
//         if (/^https:\/\/gist.github.com/.test(url)) {
//             output.type = "github";
//             match = url.match(/https:\/\/gist.github.com\/(.*)\/(.*)/);
//             output.display = match[1];
//             output.url = `https://github.com/${match[1]}`;
//             output.proofUrlFetch = `https://api.github.com/gists/${match[2]}`;
//             try {
//                 response = await fetch(output.proofUrlFetch, {
//                     headers: {
//                         Accept: 'application/json'
//                     },
//                     credentials: 'omit'
//                 });
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 reVerify = new RegExp(`[Verifying my OpenPGP key: openpgp4fpr:${fingerprint}]`, 'i');
//                 if (reVerify.test(json.files["openpgp.md"].content)) {
//                     output.isVerified = true;
//                 }
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // GitLab
//         if (/\/gitlab_proof$/.test(url)) {
//             output.type = "gitlab";
//             match = url.match(/https:\/\/(.*)\/(.*)\/gitlab_proof/);
//             output.display = `${match[2]}@${match[1]}`;
//             output.url = `https://${match[1]}/${match[2]}`;
//             output.proofUrlFetch = `https://${match[1]}/api/v4/users?username=${match[2]}`;
//             try {
//                 const opts = {
//                     headers: {
//                         Accept: 'application/json'
//                     },
//                     credentials: 'omit'
//                 };
//                 // Get user
//                 response = await fetch(output.proofUrlFetch, opts);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 const user = json.find(user => user.username === match[2]);
//                 if (!user) {
//                     throw new Error('No user with username ' + match[2]);
//                 }
//                 // Get project
//                 output.proofUrlFetch = `https://${match[1]}/api/v4/users/${user.id}/projects`;
//                 response = await fetch(output.proofUrlFetch, opts);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 const project = json.find(proj => proj.path === 'gitlab_proof');
//                 if (!project) {
//                     throw new Error('No project at ' + url);
//                 }
//                 reVerify = new RegExp(`[Verifying my OpenPGP key: openpgp4fpr:${fingerprint}]`, 'i');
//                 if (reVerify.test(project.description)) {
//                     output.isVerified = true;
//                 }
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Lobsters
//         if (/^https:\/\/lobste.rs/.test(url)) {
//             output.type = "lobsters";
//             match = url.match(/https:\/\/lobste.rs\/u\/(.*)/);
//             output.display = match[1];
//             output.proofUrl = `https://lobste.rs/u/${match[1]}.json`;
//             output.proofUrlFetch = `/server/verify/proxy
// ?url=${encodeURIComponent(output.proofUrl)}
// &fingerprint=${fingerprint}
// &checkRelation=contains
// &checkPath=about
// &checkClaimFormat=message`;
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 output.isVerified = json.isVerified;
//             } catch (e) {
//             } finally {
//                 return output;
//             }
//         }
//         // Catchall
//         // Fediverse
//         try {
//             response = await fetch(url, {
//                 headers: {
//                     Accept: 'application/json'
//                 },
//                 credentials: 'omit'
//             });
//             if (!response.ok) {
//                 throw new Error('Response failed: ' + response.status);
//             }
//             json = await response.json();
//             if ('attachment' in json) {
//                 match = url.match(/https:\/\/(.*)\/@(.*)/);
//                 json.attachment.forEach((item, i) => {
//                     reVerify = new RegExp(fingerprint, 'i');
//                     if (reVerify.test(item.value)) {
//                         output.type = "fediverse";
//                         output.display = `@${json.preferredUsername}@${[match[1]]}`;
//                         output.proofUrlFetch = json.url;
//                         output.isVerified = true;
//                     }
//                 });
//             }
//             if (!output.type && 'summary' in json) {
//                 match = url.match(/https:\/\/(.*)\/users\/(.*)/);
//                 reVerify = new RegExp(`[Verifying my OpenPGP key: openpgp4fpr:${fingerprint}]`, 'i');
//                 if (reVerify.test(json.summary)) {
//                     output.type = "fediverse";
//                     output.display = `@${json.preferredUsername}@${[match[1]]}`;
//                     output.proofUrlFetch = json.url;
//                     output.isVerified = true;
//                 }
//             }
//             if (output.type) {
//                 return output;
//             }
//         } catch (e) {
//             console.warn(e);
//         }
//         // Discourse
//         try {
//             match = url.match(/https:\/\/(.*)\/u\/(.*)/);
//             output.proofUrl = `${url}.json`;
//             output.proofUrlFetch = `/server/verify/proxy
// ?url=${encodeURIComponent(output.proofUrl)}
// &fingerprint=${fingerprint}
// &checkRelation=contains
// &checkPath=user,bio_raw
// &checkClaimFormat=message`;
//             try {
//                 response = await fetch(output.proofUrlFetch);
//                 if (!response.ok) {
//                     throw new Error('Response failed: ' + response.status);
//                 }
//                 json = await response.json();
//                 if (json.isVerified) {
//                     output.type = "discourse";
//                     output.display = `${match[2]}@${match[1]}`;
//                     output.isVerified = json.isVerified;
//                     return output;
//                 }
//             } catch (e) {
//                 console.warn(e);
//             }
//         } catch (e) {
//             console.warn(e);
//         }
//     } catch (e) {
//         console.warn(e);
//     }

//     // Return output without confirmed proof
//     return output;
// }

async function fetchKeys(opts) {
    // Init
    let lookupOpts, wkd, hkd, sig, lastPrimarySig;
    let output = {
        publicKey: null,
        user: null,
        notations: null,
        sigKeyId: null,
        sigUserId: null,
        sigContent: null
    };

    // Autodetect mode
    if (opts.mode == "auto") {
        if (/.*@.*\..*/.test(opts.input)) {
            opts.mode = "wkd";
        } else {
            opts.mode = "hkp";
        }
    }

    // Fetch keys depending on the input mode
    switch (opts.mode) {
        case "plaintext":
            output.publicKey = (await openpgp.key.readArmored(opts.input)).keys[0];

            if (!output.publicKey) {
                throw("Error: No public keys could be fetched from the plaintext input.");
            }
            break;

        case "wkd":
            wkd = new openpgp.WKD();
            lookupOpts = {
                email: opts.input
            };
            output.publicKey = (await wkd.lookup(lookupOpts)).keys[0];

            if (!output.publicKey) {
                throw("Error: No public keys could be fetched using WKD.");
            }
            break;

        case "hkp":
            if (!opts.server) {opts.server = "https://keys.openpgp.org/"};
            hkp = new openpgp.HKP(opts.server);
            lookupOpts = {
                query: opts.input
            };
            output.publicKey = await hkp.lookup(lookupOpts);
            output.publicKey = (await openpgp.key.readArmored(output.publicKey)).keys[0];

            if (!output.publicKey) {
                throw("Error: No public keys could be fetched from the HKP server.");
            }
            break;

        case "keybase":
            opts.keyLink = `https://keybase.io/${opts.username}/pgp_keys.asc?fingerprint=${opts.fingerprint}`;
            opts.input = `${opts.username}/${opts.fingerprint}`;
            try {
                opts.plaintext = await fetch(opts.keyLink).then(function(response) {
                    if (response.status === 200) {
                        return response;
                    }
                })
                .then(response => response.text());
            } catch (e) {
                throw(`Error: No public keys could be fetched from the Keybase account (${e}).`);
            }
            output.publicKey = (await openpgp.key.readArmored(opts.plaintext)).keys[0];

            if (!output.publicKey) {
                throw("Error: No public keys could be read from the Keybase account.");
            }
            break;

        case "signature":
            sig = (await openpgp.signature.readArmored(opts.signature));
            if ('compressed' in sig.packets[0]) {
                sig = sig.packets[0];
                output.sigContent = (await openpgp.stream.readToEnd(await sig.packets[1].getText()));
            };
            output.sigUserId = sig.packets[0].signersUserId;
            output.sigKeyId = (await sig.packets[0].issuerKeyId.toHex());

            if (!opts.server) {opts.server = "https://keys.openpgp.org/"};
            hkp = new openpgp.HKP(opts.server);
            lookupOpts = {
                query: output.sigUserId ? output.sigUserId : output.sigKeyId
            };
            output.publicKey = await hkp.lookup(lookupOpts);
            output.publicKey = (await openpgp.key.readArmored(output.publicKey)).keys[0];

            if (!output.publicKey) {
                throw("Error: No public keys could be extracted from the signature.");
            }
            break;
    }

    // Gather more data about the primary key and user
    output.fingerprint = await output.publicKey.primaryKey.getFingerprint();
    output.user = await output.publicKey.getPrimaryUser();
    lastPrimarySig = output.user.selfCertification;
    output.notations = lastPrimarySig.notations || [];

    return output;
}

async function computeWKDLocalPart(message) {
    const data = openpgp.util.str_to_Uint8Array(message);
    const hash = await openpgp.crypto.hash.sha1(data);
    return openpgp.util.encodeZBase32(hash);
}

async function generateProfileURL(data) {
    let hostname = window.location.hostname;

    if (data.input == "") {
        return "Waiting for input...";
    }
    switch (data.source) {
        case "wkd":
            return `https://${hostname}/${data.input}`;
            break;
        case "hkp":
            if (/.*@.*\..*/.test(data.input)) {
                return `https://${hostname}/hkp/${data.input}`;
            } else {
                return `https://${hostname}/${data.input}`;
            }
            break;
        case "keybase":
            const re = /https\:\/\/keybase.io\/(.*)\/pgp_keys\.asc\?fingerprint\=(.*)/;
            if (!re.test(data.input)) {
                return "Incorrect Keybase public key URL.";
            }
            const match = data.input.match(re);
            return `https://${hostname}/keybase/${match[1]}/${match[2]}`;
            break;
    }
}

async function fetchWithTimeout(url, timeout = 3000) {
    return Promise.race([
        fetch(url),
        new Promise((_, reject) =>
            setTimeout(() => reject(new Error('timeout')), timeout)
        )
    ]);
}

// General purpose
let elFormVerify = document.body.querySelector("#form-verify"),
    elFormEncrypt = document.body.querySelector("#form-encrypt"),
    elFormProofs = document.body.querySelector("#form-proofs"),
    elFormSignatureProfile = document.body.querySelector("#form-generate-signature-profile"),
    elProfileUid = document.body.querySelector("#profileUid"),
    elProfileMode = document.body.querySelector("#profileMode"),
    elProfileServer = document.body.querySelector("#profileServer"),
    elModeSelect = document.body.querySelector("#modeSelect"),
    elUtilWKD = document.body.querySelector("#form-util-wkd"),
    elUtilQRFP = document.body.querySelector("#form-util-qrfp"),
    elUtilQR = document.body.querySelector("#form-util-qr"),
    elUtilProfileURL = document.body.querySelector("#form-util-profile-url");

if (elModeSelect) {
    elModeSelect.onchange = function (evt) {
        let elAllModes = document.body.querySelectorAll('.modes');
        elAllModes.forEach(function(el) {
            el.classList.remove('modes--visible');
        });
        document.body.querySelector(`.modes--${elModeSelect.value}`).classList.add('modes--visible');
    }
    elModeSelect.dispatchEvent(new Event("change"));
}

if (elFormVerify) {
    elFormVerify.onsubmit = function (evt) {
        evt.preventDefault();

        let opts = {
            signature: null,
            mode: null,
            input: null,
            server: null,
        };

        opts.signature = document.body.querySelector("#signature").value;
        opts.mode = document.body.querySelector("#modeSelect").value;

        switch (opts.mode) {
            default:
            case "auto":
                opts.input = document.body.querySelector("#auto_input").value;
                break;

            case "wkd":
                opts.input = document.body.querySelector("#wkd_input").value;
                break;

            case "hkp":
                opts.input = document.body.querySelector("#hkp_input").value;
                opts.server =  document.body.querySelector("#hkp_server").value;
                break;

            case "plaintext":
                opts.input = document.body.querySelector("#plaintext_input").value;
                break;

            case "keybase":
                opts.username = document.body.querySelector("#keybase_username").value;
                opts.fingerprint =  document.body.querySelector("#keybase_fingerprint").value;
                break;
        }

        // If no input was detect
        if (!opts.input && !opts.username) {
            opts.mode = "signature";
        }

        verifySignature(opts);
    };
}

if (elFormEncrypt) {
    elFormEncrypt.onsubmit = function (evt) {
        evt.preventDefault();

        let opts = {
            message: null,
            mode: null,
            input: null,
            server: null,
        };

        opts.message = document.body.querySelector("#message").value;
        opts.mode = document.body.querySelector("#modeSelect").value;

        switch (opts.mode) {
            default:
            case "auto":
                opts.input = document.body.querySelector("#auto_input").value;
                break;

            case "wkd":
                opts.input = document.body.querySelector("#wkd_input").value;
                break;

            case "hkp":
                opts.input = document.body.querySelector("#hkp_input").value;
                opts.server =  document.body.querySelector("#hkp_server").value;
                break;

            case "plaintext":
                opts.input = document.body.querySelector("#plaintext_input").value;
                break;

            case "keybase":
                opts.username = document.body.querySelector("#keybase_username").value;
                opts.fingerprint =  document.body.querySelector("#keybase_fingerprint").value;
                break;
        }

        encryptMessage(opts);
    };
}

if (elFormProofs) {
    elFormProofs.onsubmit = function (evt) {
        evt.preventDefault();

        let opts = {
            mode: null,
            input: null,
            server: null,
        };

        opts.mode = document.body.querySelector("#modeSelect").value;

        switch (opts.mode) {
            default:
            case "auto":
                opts.input = document.body.querySelector("#auto_input").value;
                break;

            case "wkd":
                opts.input = document.body.querySelector("#wkd_input").value;
                break;

            case "hkp":
                opts.input = document.body.querySelector("#hkp_input").value;
                opts.server =  document.body.querySelector("#hkp_server").value;
                break;

            case "plaintext":
                opts.input = document.body.querySelector("#plaintext_input").value;
                break;
        }

        verifyProofs(opts);
    };
}

if (elProfileUid) {
    let opts, profileUid = elProfileUid.innerHTML;
    switch (elProfileMode.innerHTML) {
        default:
        case "sig":
            elFormSignatureProfile.onsubmit = function (evt) {
                evt.preventDefault();

                opts = {
                    input: document.body.querySelector("#plaintext_input").value,
                    mode: elProfileMode.innerHTML
                }

                displayProfile(opts)
            }
            break;

        case "auto":
            if (/.*@.*/.test(profileUid)) {
                // Match email for wkd
                opts = {
                    input: profileUid,
                    mode: "wkd"
                }
            } else {
                // Match fingerprint for hkp
                opts = {
                    input: profileUid,
                    mode: "hkp"
                }
            }
            break;

        case "hkp":
            opts = {
                input: profileUid,
                server: elProfileServer.innerHTML,
                mode: elProfileMode.innerHTML
            }
            break;

        case "wkd":
            opts = {
                input: profileUid,
                mode: elProfileMode.innerHTML
            }
            break;

        case "keybase":
            let match = profileUid.match(/(.*)\/(.*)/);
            opts = {
                username: match[1],
                fingerprint: match[2],
                mode: elProfileMode.innerHTML
            }
            break;
    }

    if (elProfileMode.innerHTML !== 'sig') {
        displayProfile(opts);
    }
}

if (elUtilWKD) {
    elUtilWKD.onsubmit = function (evt) {
        evt.preventDefault();
    }

    const elInput = document.body.querySelector("#input");
    const elOutput = document.body.querySelector("#output");
    const elOutputDirect = document.body.querySelector("#output_url_direct");
    const elOutputAdvanced = document.body.querySelector("#output_url_advanced");
    let match;

    elInput.addEventListener("input", async function(evt) {
        if (evt.target.value) {
            if (/(.*)@(.{1,}\..{1,})/.test(evt.target.value)) {
                match = evt.target.value.match(/(.*)@(.*)/);
                elOutput.innerText = await computeWKDLocalPart(match[1]);
                elOutputDirect.innerText = `https://${match[2]}/.well-known/openpgpkey/hu/${elOutput.innerText}?l=${match[1]}`;
                elOutputAdvanced.innerText = `https://openpgpkey.${match[2]}/.well-known/openpgpkey/${match[2]}/hu/${elOutput.innerText}?l=${match[1]}`;
            } else {
                elOutput.innerText = await computeWKDLocalPart(evt.target.value);
                elOutputDirect.innerText = "Waiting for input";
                elOutputAdvanced.innerText = "Waiting for input";
            }
        } else {
            elOutput.innerText = "Waiting for input";
            elOutputDirect.innerText = "Waiting for input";
            elOutputAdvanced.innerText = "Waiting for input";
        }
    });

    elInput.dispatchEvent(new Event("input"));
}

if (elUtilQRFP) {
    elUtilQRFP.onsubmit = function (evt) {
        evt.preventDefault();
    }

    const qrTarget = document.getElementById('qrcode');
    const qrContext = qrTarget.getContext('2d');
    const qrOpts = {
        errorCorrectionLevel: 'H',
        margin: 1,
        width: 256,
        height: 256
    };

    const elInput = document.body.querySelector("#input");

    elInput.addEventListener("input", async function(evt) {
        if (evt.target.value) {
            QRCode.toCanvas(qrTarget, evt.target.value, qrOpts, function (error) {
                if (error) {
                    qrContext.clearRect(0, 0, qrTarget.width, qrTarget.height);
                    console.error(error);
                }
            });
        } else {
            qrContext.clearRect(0, 0, qrTarget.width, qrTarget.height);
        }
    });

    elInput.dispatchEvent(new Event("input"));
}

if (elUtilQR) {
    elUtilQR.onsubmit = function (evt) {
        evt.preventDefault();
    }

    const qrTarget = document.getElementById('qrcode');
    const qrContext = qrTarget.getContext('2d');
    const qrOpts = {
        errorCorrectionLevel: 'L',
        margin: 1,
        width: 256,
        height: 256
    };

    const elInput = document.body.querySelector("#input");

    if (elInput.innerText) {
        elInput.innerText = decodeURIComponent(elInput.innerText);

        QRCode.toCanvas(qrTarget, elInput.innerText, qrOpts, function (error) {
            if (error) {
                document.body.querySelector("#qrcode--altLink").href = "#";
                qrContext.clearRect(0, 0, qrTarget.width, qrTarget.height);
                console.error(error);
            } else {
                document.body.querySelector("#qrcode--altLink").href = elInput.innerText;
            }
        });
    } else {
        qrContext.clearRect(0, 0, qrTarget.width, qrTarget.height);
    }
}

if (elUtilProfileURL) {
    elUtilProfileURL.onsubmit = function (evt) {
        evt.preventDefault();
    }

    const elInput = document.body.querySelector("#input"),
        elSource = document.body.querySelector("#source"),
        elOutput = document.body.querySelector("#output");

    let data = {
        input: elInput.value,
        source: elSource.value
    };

    elInput.addEventListener("input", async function(evt) {
        data = {
            input: elInput.value,
            source: elSource.value
        };
        elOutput.innerText = await generateProfileURL(data);
    });

    elSource.addEventListener("input", async function(evt) {
        data = {
            input: elInput.value,
            source: elSource.value
        };
        elOutput.innerText = await generateProfileURL(data);
    });

    elInput.dispatchEvent(new Event("input"));
}

function capitalizeLetteredServices(serviceName) {
    const servName = serviceName.toLowerCase();
    if (servName === 'dns' || servName === 'xmpp' || servName === 'irc') {
        return servName.toUpperCase();
    }
    return serviceName;
}