Configure and check committer email against GPG user address

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.1.0 (2020/05/05)
+
+* Configure and check committer email against GPG user address
+
 ## 1.0.0 (2020/05/04)
 
 * Enable signing for Git commits and tags (#4)

README.md

@@ -16,8 +16,9 @@ If you are interested, [check out](https://git.io/Je09Y) my other :octocat: GitH
 
 * Works on Linux and MacOS [virtual environments](https://help.github.com/en/articles/virtual-environments-for-github-actions#supported-virtual-environments-and-hardware-resources)
 * Allow to seed the internal cache of `gpg-agent` with provided passphrase
-* Purge imported GPG key and cache information from runner (security)
 * Enable signing for Git commits and tags
+* Configure and check committer info against GPG key
+* Purge imported GPG key and cache information from runner
 
 ## Usage
 
@@ -52,8 +53,10 @@ jobs:
 Following inputs can be used as `step.with` keys
 
 | Name                   | Type    | Description                                              |
-|----------------------|---------|----------------------------------------------------------|
+|------------------------|---------|----------------------------------------------------------|
 | `git_gpgsign`          | Bool    | Enable signing for this Git repository (default `false`) |
+| `git_committer_name`   | String  | Commit author's name (default [GITHUB_ACTOR](https://help.github.com/en/github/automating-your-workflow-with-github-actions/using-environment-variables#default-environment-variables) or `github-actions`) |
+| `git_committer_email`  | String  | Commit author's email (default `<committer_name>@users.noreply.github.com`) |
 
 ### environment variables
 

__tests__/gpg.test.ts

@@ -5,7 +5,6 @@ const userInfo = {
   email: 'joe@foo.bar',
   passphrase: 'with stupid passphrase',
   keyID: 'D523BD50DD70B0BA',
-  userID: 'Joe Tester <joe@foo.bar>',
   fingerprint: '27571A53B86AF0C799B38BA77D851EB72D73BDA0',
   keygrip: 'BA83FC8947213477F28ADC019F6564A956456163',
   pgp: `-----BEGIN PGP PRIVATE KEY BLOCK-----

__tests__/openpgp.test.ts

@@ -5,7 +5,6 @@ const userInfo = {
   email: 'joe@foo.bar',
   passphrase: 'with stupid passphrase',
   keyID: 'D523BD50DD70B0BA',
-  userID: 'Joe Tester <joe@foo.bar>',
   fingerprint: '27571A53B86AF0C799B38BA77D851EB72D73BDA0',
   pgp: `-----BEGIN PGP PRIVATE KEY BLOCK-----
 
@@ -120,7 +119,8 @@ describe('openpgp', () => {
     it('returns a PGP private key', async () => {
       await openpgp.readPrivateKey(userInfo.pgp).then(privateKey => {
         expect(privateKey.keyID).toEqual(userInfo.keyID);
-        expect(privateKey.userID).toEqual(userInfo.userID);
+        expect(privateKey.name).toEqual(userInfo.name);
+        expect(privateKey.email).toEqual(userInfo.email);
         expect(privateKey.fingerprint).toEqual(userInfo.fingerprint);
       });
     });

action.yml

@@ -10,6 +10,10 @@ inputs:
   git_gpgsign:
     description: 'Enable signing for this Git repository'
     default: 'false'
+  git_committer_name:
+    description: 'Commit author''s name'
+  git_committer_email:
+    description: 'Commit author''s email'
 
 runs:
   using: 'node12'

dist/index.js

@@ -1031,6 +1031,9 @@ function run() {
                 core.setFailed('Signing key required');
                 return;
             }
+            const git_gpgsign = /true/i.test(core.getInput('git_gpgsign'));
+            const git_committer_name = core.getInput('git_committer_name') || process.env['GITHUB_ACTOR'] || 'github-actions';
+            const git_committer_email = core.getInput('git_committer_email') || `${git_committer_name}@users.noreply.github.com`;
             core.info('📣 GnuPG info');
             const version = yield gpg.getVersion();
             const dirs = yield gpg.getDirs();
@@ -1043,7 +1046,8 @@ function run() {
             const privateKey = yield openpgp.readPrivateKey(process.env.SIGNING_KEY);
             core.debug(`Fingerprint  : ${privateKey.fingerprint}`);
             core.debug(`KeyID        : ${privateKey.keyID}`);
-            core.debug(`UserID       : ${privateKey.userID}`);
+            core.debug(`Name         : ${privateKey.name}`);
+            core.debug(`Email        : ${privateKey.email}`);
             core.debug(`CreationTime : ${privateKey.creationTime}`);
             core.info('🔑 Importing secret key');
             yield gpg.importKey(process.env.SIGNING_KEY).then(stdout => {
@@ -1060,7 +1064,14 @@ function run() {
                     core.debug(stdout);
                 });
             }
-            if (/true/i.test(core.getInput('git_gpgsign'))) {
+            if (git_gpgsign) {
+                core.info(`🔨 Configuring git committer to be ${git_committer_name} <${git_committer_email}>`);
+                if (git_committer_email != privateKey.email) {
+                    core.setFailed('Committer email does not match GPG key user address');
+                    return;
+                }
+                yield git.setConfig('user.name', git_committer_name);
+                yield git.setConfig('user.email', git_committer_email);
                 core.info('💎 Enable signing for this Git repository');
                 yield git.enableCommitGpgsign();
                 yield git.setUserSigningkey(privateKey.keyID);
@@ -1429,6 +1440,18 @@ function setUserSigningkey(keyid) {
     });
 }
 exports.setUserSigningkey = setUserSigningkey;
+function getConfig(key) {
+    return __awaiter(this, void 0, void 0, function* () {
+        return yield git(['config', key]);
+    });
+}
+exports.getConfig = getConfig;
+function setConfig(key, value) {
+    return __awaiter(this, void 0, void 0, function* () {
+        yield git(['config', key, value]);
+    });
+}
+exports.setConfig = setConfig;
 
 
 /***/ }),
@@ -45642,22 +45665,28 @@ var __importStar = (this && this.__importStar) || function (mod) {
     result["default"] = mod;
     return result;
 };
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 const openpgp = __importStar(__webpack_require__(724));
+const addressparser_1 = __importDefault(__webpack_require__(977));
 exports.readPrivateKey = (armoredText) => __awaiter(void 0, void 0, void 0, function* () {
     const { keys: [privateKey], err: err } = yield openpgp.key.readArmored(armoredText);
     if (err === null || err === void 0 ? void 0 : err.length) {
         throw err[0];
     }
+    const address = yield privateKey.getPrimaryUser().then(primaryUser => {
+        return addressparser_1.default(primaryUser.user.userId.userid)[0];
+    });
     return {
         fingerprint: privateKey.getFingerprint().toUpperCase(),
         keyID: yield privateKey.getEncryptionKey().then(encKey => {
             // @ts-ignore
             return encKey === null || encKey === void 0 ? void 0 : encKey.getKeyId().toHex().toUpperCase();
         }),
-        userID: yield privateKey.getPrimaryUser().then(primaryUser => {
-            return primaryUser.user.userId.userid;
-        }),
+        name: address.name,
+        email: address.address,
         creationTime: privateKey.getCreationTime()
     };
 });
@@ -45723,6 +45752,305 @@ exports.exec = (command, args = [], silent) => __awaiter(void 0, void 0, void 0,
 });
 
 
+/***/ }),
+
+/***/ 977:
+/***/ (function(module) {
+
+"use strict";
+
+
+// expose to the world
+module.exports = addressparser;
+
+/**
+ * Parses structured e-mail addresses from an address field
+ *
+ * Example:
+ *
+ *    'Name <address@domain>'
+ *
+ * will be converted to
+ *
+ *     [{name: 'Name', address: 'address@domain'}]
+ *
+ * @param {String} str Address field
+ * @return {Array} An array of address objects
+ */
+function addressparser(str) {
+    var tokenizer = new Tokenizer(str);
+    var tokens = tokenizer.tokenize();
+
+    var addresses = [];
+    var address = [];
+    var parsedAddresses = [];
+
+    tokens.forEach(function (token) {
+        if (token.type === 'operator' && (token.value === ',' || token.value === ';')) {
+            if (address.length) {
+                addresses.push(address);
+            }
+            address = [];
+        } else {
+            address.push(token);
+        }
+    });
+
+    if (address.length) {
+        addresses.push(address);
+    }
+
+    addresses.forEach(function (address) {
+        address = _handleAddress(address);
+        if (address.length) {
+            parsedAddresses = parsedAddresses.concat(address);
+        }
+    });
+
+    return parsedAddresses;
+}
+
+/**
+ * Converts tokens for a single address into an address object
+ *
+ * @param {Array} tokens Tokens object
+ * @return {Object} Address object
+ */
+function _handleAddress(tokens) {
+    var token;
+    var isGroup = false;
+    var state = 'text';
+    var address;
+    var addresses = [];
+    var data = {
+        address: [],
+        comment: [],
+        group: [],
+        text: []
+    };
+    var i;
+    var len;
+
+    // Filter out <addresses>, (comments) and regular text
+    for (i = 0, len = tokens.length; i < len; i++) {
+        token = tokens[i];
+        if (token.type === 'operator') {
+            switch (token.value) {
+                case '<':
+                    state = 'address';
+                    break;
+                case '(':
+                    state = 'comment';
+                    break;
+                case ':':
+                    state = 'group';
+                    isGroup = true;
+                    break;
+                default:
+                    state = 'text';
+            }
+        } else if (token.value) {
+            if (state === 'address') {
+                // handle use case where unquoted name includes a "<"
+                // Apple Mail truncates everything between an unexpected < and an address
+                // and so will we
+                token.value = token.value.replace(/^[^<]*<\s*/, '');
+            }
+            data[state].push(token.value);
+        }
+    }
+
+    // If there is no text but a comment, replace the two
+    if (!data.text.length && data.comment.length) {
+        data.text = data.comment;
+        data.comment = [];
+    }
+
+    if (isGroup) {
+        // http://tools.ietf.org/html/rfc2822#appendix-A.1.3
+        data.text = data.text.join(' ');
+        addresses.push({
+            name: data.text || (address && address.name),
+            group: data.group.length ? addressparser(data.group.join(',')) : []
+        });
+    } else {
+        // If no address was found, try to detect one from regular text
+        if (!data.address.length && data.text.length) {
+            for (i = data.text.length - 1; i >= 0; i--) {
+                if (data.text[i].match(/^[^@\s]+@[^@\s]+$/)) {
+                    data.address = data.text.splice(i, 1);
+                    break;
+                }
+            }
+
+            var _regexHandler = function (address) {
+                if (!data.address.length) {
+                    data.address = [address.trim()];
+                    return ' ';
+                } else {
+                    return address;
+                }
+            };
+
+            // still no address
+            if (!data.address.length) {
+                for (i = data.text.length - 1; i >= 0; i--) {
+                    // fixed the regex to parse email address correctly when email address has more than one @
+                    data.text[i] = data.text[i].replace(/\s*\b[^@\s]+@[^\s]+\b\s*/, _regexHandler).trim();
+                    if (data.address.length) {
+                        break;
+                    }
+                }
+            }
+        }
+
+        // If there's still is no text but a comment exixts, replace the two
+        if (!data.text.length && data.comment.length) {
+            data.text = data.comment;
+            data.comment = [];
+        }
+
+        // Keep only the first address occurence, push others to regular text
+        if (data.address.length > 1) {
+            data.text = data.text.concat(data.address.splice(1));
+        }
+
+        // Join values with spaces
+        data.text = data.text.join(' ');
+        data.address = data.address.join(' ');
+
+        if (!data.address && isGroup) {
+            return [];
+        } else {
+            address = {
+                address: data.address || data.text || '',
+                name: data.text || data.address || ''
+            };
+
+            if (address.address === address.name) {
+                if ((address.address || '').match(/@/)) {
+                    address.name = '';
+                } else {
+                    address.address = '';
+                }
+
+            }
+
+            addresses.push(address);
+        }
+    }
+
+    return addresses;
+}
+
+/**
+ * Creates a Tokenizer object for tokenizing address field strings
+ *
+ * @constructor
+ * @param {String} str Address field string
+ */
+function Tokenizer(str) {
+    this.str = (str || '').toString();
+    this.operatorCurrent = '';
+    this.operatorExpecting = '';
+    this.node = null;
+    this.escaped = false;
+
+    this.list = [];
+}
+
+/**
+ * Operator tokens and which tokens are expected to end the sequence
+ */
+Tokenizer.prototype.operators = {
+    '"': '"',
+    '(': ')',
+    '<': '>',
+    ',': '',
+    ':': ';',
+    // Semicolons are not a legal delimiter per the RFC2822 grammar other
+    // than for terminating a group, but they are also not valid for any
+    // other use in this context.  Given that some mail clients have
+    // historically allowed the semicolon as a delimiter equivalent to the
+    // comma in their UI, it makes sense to treat them the same as a comma
+    // when used outside of a group.
+    ';': ''
+};
+
+/**
+ * Tokenizes the original input string
+ *
+ * @return {Array} An array of operator|text tokens
+ */
+Tokenizer.prototype.tokenize = function () {
+    var chr, list = [];
+    for (var i = 0, len = this.str.length; i < len; i++) {
+        chr = this.str.charAt(i);
+        this.checkChar(chr);
+    }
+
+    this.list.forEach(function (node) {
+        node.value = (node.value || '').toString().trim();
+        if (node.value) {
+            list.push(node);
+        }
+    });
+
+    return list;
+};
+
+/**
+ * Checks if a character is an operator or text and acts accordingly
+ *
+ * @param {String} chr Character from the address field
+ */
+Tokenizer.prototype.checkChar = function (chr) {
+    if ((chr in this.operators || chr === '\\') && this.escaped) {
+        this.escaped = false;
+    } else if (this.operatorExpecting && chr === this.operatorExpecting) {
+        this.node = {
+            type: 'operator',
+            value: chr
+        };
+        this.list.push(this.node);
+        this.node = null;
+        this.operatorExpecting = '';
+        this.escaped = false;
+        return;
+    } else if (!this.operatorExpecting && chr in this.operators) {
+        this.node = {
+            type: 'operator',
+            value: chr
+        };
+        this.list.push(this.node);
+        this.node = null;
+        this.operatorExpecting = this.operators[chr];
+        this.escaped = false;
+        return;
+    }
+
+    if (!this.escaped && chr === '\\') {
+        this.escaped = true;
+        return;
+    }
+
+    if (!this.node) {
+        this.node = {
+            type: 'text',
+            value: ''
+        };
+        this.list.push(this.node);
+    }
+
+    if (this.escaped && chr !== '\\') {
+        this.node.value += '\\';
+    }
+
+    this.node.value += chr;
+    this.escaped = false;
+};
+
+
 /***/ }),
 
 /***/ 986:

package-lock.json

@@ -973,6 +973,11 @@
       "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
       "dev": true
     },
+    "addressparser": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/addressparser/-/addressparser-1.0.1.tgz",
+      "integrity": "sha1-R6++GiqSYhkdtoOOT9HTm0CCF0Y="
+    },
     "ajv": {
       "version": "6.12.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz",

package.json

@@ -25,6 +25,7 @@
     "@actions/core": "^1.2.3",
     "@actions/exec": "^1.0.4",
     "@actions/github": "^2.1.1",
+    "addressparser": "^1.0.1",
     "openpgp": "^4.10.4"
   },
   "devDependencies": {

src/addressparser.d.ts

@@ -0,0 +1,24 @@
+declare namespace addressparser {
+  interface Address {
+    name: string;
+    address: string;
+  }
+}
+
+/**
+ * Parses structured e-mail addresses from an address field
+ *
+ * Example:
+ *
+ *    'Name <address@domain>'
+ *
+ * will be converted to
+ *
+ *     [{name: 'Name', address: 'address@domain'}]
+ *
+ * @param str Address field
+ * @return An array of address objects
+ */
+declare function addressparser(address: string): addressparser.Address[];
+
+export = addressparser;

src/git.ts

@@ -16,3 +16,11 @@ export async function enableCommitGpgsign(): Promise<void> {
 export async function setUserSigningkey(keyid: string): Promise<void> {
   await git(['config', 'user.signingkey', keyid]);
 }
+
+export async function getConfig(key: string): Promise<string> {
+  return await git(['config', key]);
+}
+
+export async function setConfig(key: string, value: string): Promise<void> {
+  await git(['config', key, value]);
+}

src/main.ts

@@ -17,6 +17,12 @@ async function run(): Promise<void> {
       return;
     }
 
+    const git_gpgsign = /true/i.test(core.getInput('git_gpgsign'));
+    const git_committer_name: string =
+      core.getInput('git_committer_name') || process.env['GITHUB_ACTOR'] || 'github-actions';
+    const git_committer_email: string =
+      core.getInput('git_committer_email') || `${git_committer_name}@users.noreply.github.com`;
+
     core.info('📣 GnuPG info');
     const version = await gpg.getVersion();
     const dirs = await gpg.getDirs();
@@ -30,7 +36,8 @@ async function run(): Promise<void> {
     const privateKey = await openpgp.readPrivateKey(process.env.SIGNING_KEY);
     core.debug(`Fingerprint  : ${privateKey.fingerprint}`);
     core.debug(`KeyID        : ${privateKey.keyID}`);
-    core.debug(`UserID       : ${privateKey.userID}`);
+    core.debug(`Name         : ${privateKey.name}`);
+    core.debug(`Email        : ${privateKey.email}`);
     core.debug(`CreationTime : ${privateKey.creationTime}`);
 
     core.info('🔑 Importing secret key');
@@ -52,7 +59,16 @@ async function run(): Promise<void> {
       });
     }
 
-    if (/true/i.test(core.getInput('git_gpgsign'))) {
+    if (git_gpgsign) {
+      core.info(`🔨 Configuring git committer to be ${git_committer_name} <${git_committer_email}>`);
+      if (git_committer_email != privateKey.email) {
+        core.setFailed('Committer email does not match GPG key user address');
+        return;
+      }
+
+      await git.setConfig('user.name', git_committer_name);
+      await git.setConfig('user.email', git_committer_email);
+
       core.info('💎 Enable signing for this Git repository');
       await git.enableCommitGpgsign();
       await git.setUserSigningkey(privateKey.keyID);

src/openpgp.ts

@@ -1,9 +1,11 @@
 import * as openpgp from 'openpgp';
+import addressparser from 'addressparser';
 
 export interface PrivateKey {
   fingerprint: string;
   keyID: string;
-  userID: string;
+  name: string;
+  email: string;
   creationTime: Date;
 }
 
@@ -21,15 +23,18 @@ export const readPrivateKey = async (armoredText: string): Promise<PrivateKey> =
     throw err[0];
   }
 
+  const address = await privateKey.getPrimaryUser().then(primaryUser => {
+    return addressparser(primaryUser.user.userId.userid)[0];
+  });
+
   return {
     fingerprint: privateKey.getFingerprint().toUpperCase(),
     keyID: await privateKey.getEncryptionKey().then(encKey => {
       // @ts-ignore
       return encKey?.getKeyId().toHex().toUpperCase();
     }),
-    userID: await privateKey.getPrimaryUser().then(primaryUser => {
-      return primaryUser.user.userId.userid;
-    }),
+    name: address.name,
+    email: address.address,
     creationTime: privateKey.getCreationTime()
   };
 };