Deployed 13d2f43 with MkDocs version: 1.5.3

assets/javascripts/decrypt-contents.js

@@ -0,0 +1,319 @@
+/* encryptcontent/decrypt-contents.tpl.js */
+
+function base64url_decode(input) {
+    try {
+        const binString = atob(input.replace(/-/g, '+').replace(/_/g, '/'));
+        const binArray = Uint8Array.from(binString, (m) => m.codePointAt(0));
+        return new TextDecoder().decode(binArray);
+    }
+    catch (err) {
+        return false;
+    }
+}
+
+/* Decrypts the key from the key bundle. */
+function decrypt_key(pass, iv_b64, ciphertext_b64, salt_b64) {
+    let salt = CryptoJS.enc.Base64.parse(salt_b64),
+        kdfcfg = {keySize: 256 / 32,hasher: CryptoJS.algo.SHA256,iterations: encryptcontent_obfuscate ? 1 : 10000};
+    let kdfkey = CryptoJS.PBKDF2(pass, salt,kdfcfg);
+    let iv = CryptoJS.enc.Base64.parse(iv_b64),
+        ciphertext = CryptoJS.enc.Base64.parse(ciphertext_b64);
+    let encrypted = {ciphertext: ciphertext},
+        cfg = {iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7};
+    let key = CryptoJS.AES.decrypt(encrypted, kdfkey, cfg);
+
+    try {
+        let keystore = JSON.parse(key.toString(CryptoJS.enc.Utf8));
+        if (encryptcontent_id in keystore) {
+            return keystore;
+        } else {
+            //id not found in keystore
+            return false;
+        }
+    } catch (err) {
+        // encoding failed; wrong password
+        return false;
+    }
+};
+
+/* Split key bundle and try to decrypt it */
+function decrypt_key_from_bundle(password, ciphertext_bundle, username) {
+    // grab the ciphertext bundle and try to decrypt it
+    let user, pass;
+    let parts, keys, userhash;
+    if (ciphertext_bundle) {
+        if (username) {
+            user = encodeURIComponent(username.toLowerCase());
+            userhash = CryptoJS.SHA256(user).toString(CryptoJS.enc.Base64);
+        }
+        for (let i = 0; i < ciphertext_bundle.length; i++) {
+            pass = encodeURIComponent(password);
+            parts = ciphertext_bundle[i].split(';');
+            if (parts.length == 3) {
+                keys = decrypt_key(pass, parts[0], parts[1], parts[2]);
+                if (keys) {
+
+                    return keys;
+                }
+            } else if (parts.length == 4 && username) {
+                if (parts[3] == userhash) {
+                    keys = decrypt_key(pass, parts[0], parts[1], parts[2]);
+                    if (keys) {
+
+                        return keys;
+                    }
+                }
+            }
+        }
+    }
+    return false;
+};
+
+/* Decrypts the content from the ciphertext bundle. */
+function decrypt_content(key, iv_b64, ciphertext_b64) {
+    let iv = CryptoJS.enc.Base64.parse(iv_b64),
+        ciphertext = CryptoJS.enc.Base64.parse(ciphertext_b64);
+    let encrypted = {ciphertext: ciphertext},
+        cfg = {iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7};
+    let plaintext = CryptoJS.AES.decrypt(encrypted, CryptoJS.enc.Hex.parse(key), cfg);
+    if(plaintext.sigBytes >= 0) {
+        try {
+            return plaintext.toString(CryptoJS.enc.Utf8)
+        } catch (err) {
+            // encoding failed; wrong key
+            return false;
+        }
+    } else {
+        // negative sigBytes; wrong key
+        return false;
+    }
+};
+
+/* Split cyphertext bundle and try to decrypt it */
+function decrypt_content_from_bundle(key, ciphertext_bundle) {
+    // grab the ciphertext bundle and try to decrypt it
+    if (ciphertext_bundle) {
+        let parts = ciphertext_bundle.split(';');
+        if (parts.length == 2) {
+            return decrypt_content(key, parts[0], parts[1]);
+        }
+    }
+    return false;
+};
+
+/* Save decrypted keystore to sessionStorage */
+function setKeys(keys_from_keystore) {
+    for (const id in keys_from_keystore) {
+        sessionStorage.setItem(id, keys_from_keystore[id]);
+    }
+};
+
+/* Delete key with specific name in sessionStorage */
+function delItemName(key) {
+    sessionStorage.removeItem(key);
+};
+
+function getItemName(key) {
+    return sessionStorage.getItem(key);
+};
+
+/* Reload scripts src after decryption process */
+function reload_js(src) {
+    let script_src, script_tag, new_script_tag;
+    let head = document.getElementsByTagName('head')[0];
+
+    if (src.startsWith('#')) {
+        script_tag = document.getElementById(src.substr(1));
+        if (script_tag) {
+            script_tag.remove();
+            new_script_tag = document.createElement('script');
+            if (script_tag.innerHTML) {
+                new_script_tag.innerHTML = script_tag.innerHTML;
+            }
+            if (script_tag.src) {
+                new_script_tag.src = script_tag.src;
+            }
+            if (script_tag.type) {
+                new_script_tag.type = script_tag.type;
+            }
+            head.appendChild(new_script_tag);
+        }
+    } else {
+        if (base_url == '.') {
+            script_src = src;
+        } else {
+            script_src = base_url + '/' + src;
+        }
+
+        script_tag = document.querySelector('script[src="' + script_src + '"]');
+        if (script_tag) {
+            script_tag.remove();
+            new_script_tag = document.createElement('script');
+            new_script_tag.src = script_src;
+            head.appendChild(new_script_tag);
+        }
+    }
+};
+
+
+
+/* Decrypt speficique html entry from mkdocs configuration */
+function decrypt_somethings(key, encrypted_something) {
+    var html_item = '';
+    for (const [name, tag] of Object.entries(encrypted_something)) {
+        if (tag[1] == 'id') {
+            html_item = [document.getElementById(name)];
+        } else if (tag[1] == 'class') {
+            html_item = document.getElementsByClassName(name);
+        } else {
+            console.log('WARNING: Unknow tag html found, check "encrypted_something" configuration.');
+        }
+        if (html_item[0]) {
+            for (let i = 0; i < html_item.length; i++) {
+                // grab the cipher bundle if something exist
+                if (html_item[i].style.display == "none") {
+                    let content = decrypt_content_from_bundle(key, html_item[i].innerHTML);
+                    if (content !== false) {
+                        // success; display the decrypted content
+                        html_item[i].innerHTML = content;
+                        html_item[i].style.display = null;
+                        // any post processing on the decrypted content should be done here
+                    }
+                }
+            }
+        }
+    }
+    return html_item[0];
+};
+
+/* Decrypt content of a page */
+function decrypt_action(username_input, password_input, encrypted_content, decrypted_content, key_from_storage=false) {
+    let key=false;
+    let keys_from_keystore=false;
+
+    let user=false;
+    if (username_input) {
+        user = username_input.value;
+    }
+
+    if (key_from_storage !== false) {
+        key = key_from_storage;
+    } else {
+        keys_from_keystore = decrypt_key_from_bundle(password_input.value, encryptcontent_keystore, user);
+        if (keys_from_keystore) {
+            key = keys_from_keystore[encryptcontent_id];
+        }
+    }
+
+    let content = false;
+    if (key) {
+        content = decrypt_content_from_bundle(key, encrypted_content.innerHTML);
+    }
+    if (content !== false) {
+        // success; display the decrypted content
+        decrypted_content.innerHTML = content;
+        encrypted_content.parentNode.removeChild(encrypted_content);
+
+        if (keys_from_keystore !== false) {
+            return keys_from_keystore
+        } else {
+            return key
+        }
+    } else {
+        return false
+    }
+};
+
+function decryptor_reaction(key_or_keys, password_input, decrypted_content, fallback_used=false) {
+    if (key_or_keys) {
+        let key;
+        if (typeof key_or_keys === "object") {
+            key = key_or_keys[encryptcontent_id];
+            setKeys(key_or_keys);
+
+        } else {
+            key = key_or_keys;
+        }
+
+        // continue to decrypt others parts
+
+        if (typeof inject_something !== 'undefined') {
+            decrypted_content = decrypt_somethings(key, inject_something);
+        }
+        if (typeof delete_something !== 'undefined') {
+            let el = document.getElementById(delete_something)
+            if (el) {
+                el.remove();
+            }
+        }
+
+        // any post processing on the decrypted content should be done here
+        if (typeof MathJax === 'object') { MathJax.typesetPromise();};
+
+
+
+        if (typeof theme_run_after_decryption !== 'undefined') {
+            theme_run_after_decryption();
+        }
+        if (window.location.hash) { //jump to anchor if hash given after decryption
+            window.location.href = window.location.hash;
+        }
+    } else {
+        // remove item on sessionStorage if decryption process fail (Invalid item)
+        if (!fallback_used) {
+            if (!encryptcontent_obfuscate) {
+                // create HTML element for the inform message
+                let mkdocs_decrypt_msg = document.getElementById('mkdocs-decrypt-msg');
+                mkdocs_decrypt_msg.textContent = decryption_failure_message;
+                password_input.value = '';
+                password_input.focus();
+            }
+        }
+        delItemName(encryptcontent_id);
+    }
+}
+
+/* Trigger decryption process */
+function init_decryptor() {
+    let username_input = document.getElementById('mkdocs-content-user');
+    let password_input = document.getElementById('mkdocs-content-password');
+    // adjust password field width to placeholder length
+    //if (password_input.hasAttribute('placeholder')) {
+    //    password_input.setAttribute('size', password_input.getAttribute('placeholder').length);
+    //}
+    let encrypted_content = document.getElementById('mkdocs-encrypted-content');
+    let decrypted_content = document.getElementById('mkdocs-decrypted-content');
+    let content_decrypted;
+    /* If remember_keys is set, try to use sessionStorage item to decrypt content when page is loaded */
+    let key_from_storage = getItemName(encryptcontent_id);
+    if (key_from_storage) {
+        content_decrypted = decrypt_action(
+            username_input, password_input, encrypted_content, decrypted_content, key_from_storage
+        );
+
+        decryptor_reaction(content_decrypted, password_input, decrypted_content, true);
+    }
+
+
+    /* Default, try decrypt content when key enter is press */
+    password_input.addEventListener('keypress', function(event) {
+        if (event.key === "Enter") {
+            event.preventDefault();
+            content_decrypted = decrypt_action(
+                username_input, password_input, encrypted_content, decrypted_content
+            );
+            decryptor_reaction(content_decrypted, password_input, decrypted_content);
+        }
+    });
+}
+if (typeof base_url === 'undefined') {
+    var base_url = JSON.parse(document.getElementById('__config').textContent).base;
+}
+if (document.readyState === "loading") {
+  // Loading hasn't finished yet
+  document.addEventListener("DOMContentLoaded", init_decryptor);
+} else {
+  // `DOMContentLoaded` has already fired
+  init_decryptor();
+}
+window["init_decryptor"] = init_decryptor;