1 files changed, 90 insertions, 0 deletions
diff --git a/core/crypto/crypto.js b/core/crypto/crypto.js
new file mode 100644
index 0000000..cc17da2
--- /dev/null
+++ b/core/crypto/crypto.js
@@ -0,0 +1,90 @@
+import { AESECBCipher, AESEAXCipher } from "./aes.js";
+import { DESCBCCipher, DESECBCipher } from "./des.js";
+import { RSACipher } from "./rsa.js";
+import { DHCipher } from "./dh.js";
+import { MD5 } from "./md5.js";
+
+// A single interface for the cryptographic algorithms not supported by SubtleCrypto.
+// Both synchronous and asynchronous implmentations are allowed.
+class LegacyCrypto {
+    constructor() {
+        this._algorithms = {
+            "AES-ECB": AESECBCipher,
+            "AES-EAX": AESEAXCipher,
+            "DES-ECB": DESECBCipher,
+            "DES-CBC": DESCBCCipher,
+            "RSA-PKCS1-v1_5": RSACipher,
+            "DH": DHCipher,
+            "MD5": MD5,
+        };
+    }
+
+    encrypt(algorithm, key, data) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.encrypt !== "function") {
+            throw new Error("key does not support encryption");
+        }
+        return key.encrypt(algorithm, data);
+    }
+
+    decrypt(algorithm, key, data) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.decrypt !== "function") {
+            throw new Error("key does not support encryption");
+        }
+        return key.decrypt(algorithm, data);
+    }
+
+    importKey(format, keyData, algorithm, extractable, keyUsages) {
+        if (format !== "raw") {
+            throw new Error("key format is not supported");
+        }
+        const alg = this._algorithms[algorithm.name];
+        if (typeof alg === "undefined" || typeof alg.importKey !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg.importKey(keyData, algorithm, extractable, keyUsages);
+    }
+
+    generateKey(algorithm, extractable, keyUsages) {
+        const alg = this._algorithms[algorithm.name];
+        if (typeof alg === "undefined" || typeof alg.generateKey !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg.generateKey(algorithm, extractable, keyUsages);
+    }
+
+    exportKey(format, key) {
+        if (format !== "raw") {
+            throw new Error("key format is not supported");
+        }
+        if (typeof key.exportKey !== "function") {
+            throw new Error("key does not support exportKey");
+        }
+        return key.exportKey();
+    }
+
+    digest(algorithm, data) {
+        const alg = this._algorithms[algorithm];
+        if (typeof alg !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg(data);
+    }
+
+    deriveBits(algorithm, key, length) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.deriveBits !== "function") {
+            throw new Error("key does not support deriveBits");
+        }
+        return key.deriveBits(algorithm, length);
+    }
+}
+
+export default new LegacyCrypto;