Fix support for signature profiles

package.json

@@ -5,6 +5,7 @@
   "main": "index.js",
   "dependencies": {
     "bent": "^7.3.12",
+    "body-parser": "^1.19.0",
     "dialog-polyfill": "^0.5.6",
     "doipjs": "^0.12.4",
     "dotenv": "^8.2.0",

routes/profile.js

@@ -28,41 +28,35 @@ 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/>.
 */
 const router = require('express').Router()
+const bodyParser = require('body-parser').urlencoded({ extended: false })
 const kx = require('../server')
 
 router.get('/sig', (req, res) => {
-    res.render('profile', { mode: 'sig' })
+    res.render('profile', { isSignature: true, signature: null })
+})
+
+router.post('/sig', bodyParser, async (req, res) => {
+    const data = await kx.generateSignatureProfile(req.body.signature)
+    res.render('profile', { data: data, isSignature: true, signature: req.body.signature })
 })
 
 router.get('/wkd/:id', async (req, res) => {
     const data = await kx.generateWKDProfile(req.params.id)
-    if (data.errors.length > 0) {
-        return res.render('profile-failed', { data: data })
-    }
     res.render('profile', { data: data })
 })
 
 router.get('/hkp/:id', async (req, res) => {
     const data = await kx.generateHKPProfile(req.params.id)
-    if (data.errors.length > 0) {
-        return res.render('profile-failed', { data: data })
-    }
     res.render('profile', { data: data })
 })
 
 router.get('/hkp/:server/:id', async (req, res) => {
     const data = await kx.generateHKPProfile(req.params.id, req.params.server)
-    if (data.errors.length > 0) {
-        return res.render('profile-failed', { data: data })
-    }
     res.render('profile', { data: data })
 })
 
 router.get('/keybase/:username/:fingerprint', async (req, res) => {
     const data = await kx.generateKeybaseProfile(req.params.username, req.params.fingerprint)
-    if (data.errors.length > 0) {
-        return res.render('profile-failed', { data: data })
-    }
     res.render('profile', { data: data })
 })
 
@@ -73,9 +67,6 @@ router.get('/:id', async (req, res) => {
     } else {
         data = await kx.generateHKPProfile(req.params.id)
     }
-    if (data.errors.length > 0) {
-        return res.render('profile-failed', { data: data })
-    }
     res.render('profile', { data: data })
 })
 

server/index.js

@@ -81,6 +81,30 @@ const generateHKPProfile = async (id, keyserverDomain) => {
     })
 }
 
+const generateSignatureProfile = async (signature) => {
+    return keys.fetchSignature(signature)
+    .then(async key => {
+        let keyData = key.keyData
+        delete key.keyData
+        keyData = processKeyData(keyData)
+
+        return {
+            key: key,
+            keyData: keyData,
+            extra: await computeExtraData(key, keyData),
+            errors: []
+        }
+    })
+    .catch(err => {
+        return {
+            key: null,
+            keyData: null,
+            extra: null,
+            errors: [err.message]
+        }
+    })
+}
+
 const generateKeybaseProfile = async (username, fingerprint) => {
     return keys.fetchKeybase(id, keyserverDomain)
     .then(async key => {
@@ -146,3 +170,4 @@ const computeExtraData = async (key, keyData) => {
 exports.generateWKDProfile = generateWKDProfile
 exports.generateHKPProfile = generateHKPProfile
 exports.generateKeybaseProfile = generateKeybaseProfile
+exports.generateSignatureProfile = generateSignatureProfile

server/keys.js

@@ -65,22 +65,22 @@ const fetchWKD = (id) => {
                     }
                 })
             } catch (error) {
-                reject(new Error("No public keys could be fetched using WKD"))
+                reject(new Error(`No public keys could be fetched using WKD`))
             }
         }
 
         if (!plaintext) {
-            reject(new Error("No public keys could be fetched using WKD"))
+            reject(new Error(`No public keys could be fetched using WKD`))
         }
 
         try {
             output.publicKey = (await openpgp.key.read(plaintext)).keys[0]
         } catch(error) {
-            reject(new Error("No public keys could be read from the data fetched using WKD"))
+            reject(new Error(`No public keys could be read from the data fetched using WKD`))
         }
 
         if (!output.publicKey) {
-            reject(new Error("No public keys could be read from the data fetched using WKD"))
+            reject(new Error(`No public keys could be read from the data fetched using WKD`))
         }
 
         resolve(output)
@@ -107,11 +107,56 @@ const fetchHKP = (id, keyserverDomain) => {
             output.publicKey = await doip.keys.fetchHKP(id, keyserverDomain)
             output.fetchURL = `https://${keyserverDomain}/pks/lookup?op=get&options=mr&search=${query}`
         } catch(error) {
-            reject(new Error("No public keys could be fetched using HKP"))
+            reject(new Error(`No public keys could be fetched using HKP`))
         }
 
         if (!output.publicKey) {
-            reject(new Error("No public keys could be fetched using HKP"))
+            reject(new Error(`No public keys could be fetched using HKP`))
+        }
+
+        resolve(output)
+    })
+}
+
+const fetchSignature = (signature) => {
+    return new Promise(async (resolve, reject) => {
+        let output = {
+            publicKey: null,
+            fetchURL: null,
+            keyData: null
+        }
+
+        // Check validity of signature
+        let signatureData
+        try {
+            signatureData = await openpgp.cleartext.readArmored(signature)
+        } catch (error) {
+            reject(new Error(`Signature could not be properly read (${error.message})`))
+        }
+
+        // Process the signature
+        try {
+            output.keyData = await doip.signatures.process(signature)
+            output.publicKey = output.keyData.key.data
+            // TODO Find the URL to the key
+            output.fetchURL = null
+        } catch(error) {
+            reject(new Error(`Signature could not be properly read (${error.message})`))
+        }
+
+        // Check if a key was fetched
+        if (!output.publicKey) {
+            reject(new Error(`No public keys could be fetched`))
+        }
+
+        // Check validity of signature
+        const verified = await openpgp.verify({
+            message: signatureData,
+            publicKeys: output.publicKey
+        })
+        const { valid } = verified.signatures[0]
+        if (!valid) {
+            reject(new Error('Signature was invalid'))
         }
 
         resolve(output)
@@ -129,11 +174,11 @@ const fetchKeybase = (username, fingerprint) => {
             output.publicKey = await doip.keys.fetchKeybase(username, fingerprint)
             output.fetchURL = `https://keybase.io/${username}/pgp_keys.asc?fingerprint=${fingerprint}`
         } catch(error) {
-            reject(new Error("No public keys could be fetched from Keybase"))
+            reject(new Error(`No public keys could be fetched from Keybase`))
         }
 
         if (!output.publicKey) {
-            reject(new Error("No public keys could be fetched from Keybase"))
+            reject(new Error(`No public keys could be fetched from Keybase`))
         }
 
         resolve(output)
@@ -142,4 +187,5 @@ const fetchKeybase = (username, fingerprint) => {
 
 exports.fetchWKD = fetchWKD
 exports.fetchHKP = fetchHKP
+exports.fetchSignature = fetchSignature
 exports.fetchKeybase = fetchKeybase

views/profile-failed.pug

@@ -1,9 +0,0 @@
-extends templates/base.pug
-
-block content
-  section.profile.narrow
-    h2 Something went wrong when generating the profile
-
-    ul
-    each error in data.errors
-      li= error

views/profile.pug

@@ -24,7 +24,7 @@ block content
   script.
     kx = {
       key: {
-        url: "!{data.key.fetchURL}",
+        url: "!{data && data.key && data.key.fetchURL ? data.key.fetchURL : null}",
         object: null
       }
     }
@@ -57,6 +57,21 @@ block content
         p
           a#qr--altLink
 
+    if (isSignature)
+      #profileSigInput.card.card--form
+        form#formGenerateSignatureProfile(method='post')
+          label(for="signature")  Please enter the raw profile signature below and press "Generate profile".
+          textarea#signature(name='signature')= signature
+          input(type='submit', name='submit', value='Generate profile')
+
+
+    if (data && 'errors' in data && data.errors.length > 0)
+      h2 Something went wrong while generating the profile
+      ul
+      each error in data.errors
+        li= error
+    else
+      unless (isSignature && !signature)
         #profileHeader.card.card--profileHeader
           a.avatar(href="#")
             img#profileAvatar(src=data.extra.avatarURL alt="avatar")
@@ -74,4 +89,3 @@ block content
           each user, index in data.keyData.users
             unless index == data.keyData.primaryUserIndex
               +generateUser(user, false)
-      

yarn.lock

@@ -874,7 +874,7 @@ bn.js@^4.0.0:
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
   integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
-body-parser@1.19.0:
+body-parser@1.19.0, body-parser@^1.19.0:
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
   integrity sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==