Work to improve encryption and decryption

src/lib/ae_utils/ae_utils__crypto.ts

@@ -1,3 +1,5 @@
+let log_lvl = 1; // 0 = no logging, 1 = some logging, 2 = all logging
+
 async function generate_iv() {
     const data = new Uint8Array(16);
     crypto.getRandomValues(data);
@@ -6,7 +8,8 @@ async function generate_iv() {
 
 
 export let encrypt_content = async function encrypt_content(
-        content: string, keyData: string
+        content: string,
+        keyData: string
         ) {
     const iv = await generate_iv();
     const keyBytes = await crypto.subtle.digest('SHA-256', new TextEncoder().encode(keyData));
@@ -17,10 +20,36 @@ export let encrypt_content = async function encrypt_content(
     return { base64, iv };
 }
 
+export let combine_iv_and_base64 = function combine_iv_and_base64(
+        base64: string,
+        iv: Uint8Array
+        ) {
+    console.log(`IV: ${iv}; Encrypted: ${base64}`);
+
+    // Combine the IV and encrypted content
+    const combined = Array.from(iv).map(byte => byte.toString(16).padStart(2, '0')).join('') + ':' + base64;
+    console.log('Combined Data v1:', combined);
+
+    // const ivBase64 = btoa(String.fromCharCode(...iv));
+    // const combined = `${ivBase64}:${base64}`;
+    // console.log('Combined IV and Base64 v2:', combined);
+    return combined;
+}
+
+export let encrypt_wrapper = async function encrypt_wrapper(
+        content: string,
+        keyData: string
+        ) {
+    const { base64, iv } = await encrypt_content(content, keyData);
+    const combined = combine_iv_and_base64(base64, iv);
+    return combined;
+}
 
 // This does not handle errors (invalid key/password) well.
 export let decrypt_content = async function decrypt_content(
-        base64Content: string, iv: Uint8Array, keyData: string
+        base64Content: string,
+        iv: Uint8Array,
+        keyData: string
         ) {
     const keyBytes = await crypto.subtle.digest('SHA-256', new TextEncoder().encode(keyData));
     const key = await crypto.subtle.importKey('raw', keyBytes, { name: 'AES-CBC' }, false, ['decrypt']);
@@ -29,4 +58,34 @@ export let decrypt_content = async function decrypt_content(
     const decodedContent = new TextDecoder().decode(decryptedContent);
     // console.log('Decrypted Content:', decodedContent);
     return decodedContent;
+}
+
+export let split_iv_and_base64 = function split_iv_and_base64(
+        combined: string
+        ) {
+    let [iv_hex, encrypted_base64_string] = combined.split(':');
+    let base64 = encrypted_base64_string
+    let iv = new Uint8Array(iv_hex.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
+    if (log_lvl) {
+        console.log(`IV: ${iv}; Encrypted: ${base64}`);
+    }
+
+    // const [ivBase64, base64] = combined.split(':');
+    // const iv = Uint8Array.from(atob(ivBase64), c => c.charCodeAt(0));
+    // if (log_lvl) {
+    //     console.log(`IV: ${iv}; Encrypted: ${base64}`);
+    // }
+    return { iv, base64 };
+}
+
+export let decrypt_wrapper = async function decrypt_wrapper(
+        combined: string,
+        keyData: string
+        ) {
+    const { iv, base64 } = split_iv_and_base64(combined);
+    const decrypted = await decrypt_content(base64, iv, keyData);
+    if (log_lvl) {
+        console.log(`IV: ${iv}; Decrypted:`, decrypted);
+    }
+    return decrypted;
 }