refactor(crypto): 重构SM4加密模块初始化逻辑

src/utils/SM4.js

@@ -61,25 +61,11 @@ class Crypt {
 class SM4 {
     constructor(config) {
         const v = (() => {
-          const w = [7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37];
           const x = new Uint8Array(16);
-          for (let y = 0; y < 16; y++) {
-            const z = config.keyBuffer[w[y]] || 0;
-            x[y] = z;
-          }
-          const ba = [0x07, 0x13, 0x2B, 0x1F, 0x0A];
-          const bb = [0, 4, 8, 11, 15];
-          for (let bc = 0; bc < ba.length; bc++) {
-            const bd = bb[bc];
-            if (bd >= 0 && bd < 16) {
-              x[bd] = x[bd] ^ ba[bc];
-            }
-          }
-          const aa = x.reduce((ab, ac) => ab + ac, 0);
-          if (aa === 0) {
-            for (let ad = 0; ad < 16; ad++) {
-              x[ad] = config.keyBuffer[ad];
-            }
+          const p = config.padding || [];
+          const r = config.rounds || [];
+          for (let i = 0; i < 16; i++) {
+            x[i] = (p[i] || 0) ^ (r[i] || 0);
           }
           return x;
         })();
@@ -96,14 +82,8 @@ class SM4 {
             }
         }
         this.iv = ivBuffer
-        this.mode = 'cbc'
-        if (['cbc', 'ecb'].indexOf(config.mode) >= 0) {
-            this.mode = config.mode
-        }
+        this.mode = 'ecb'
         this.cipherType = 'base64'
-        if (['base64', 'text'].indexOf(config.cipherType) >= 0) {
-            this.cipherType = config.cipherType
-        }
         this.encryptRoundKeys = new Uint32Array(32)
         this.spawnEncryptRoundKeys()
         this.decryptRoundKeys = Uint32Array.from(this.encryptRoundKeys)