1 files changed, 68 insertions, 0 deletions
diff --git a/ext/crypto/00_crypto.js b/ext/crypto/00_crypto.js
index 0a78bff2f..5d216dbf4 100644
--- a/ext/crypto/00_crypto.js
+++ b/ext/crypto/00_crypto.js
@@ -126,10 +126,12 @@
     "encrypt": {
       "RSA-OAEP": "RsaOaepParams",
       "AES-CBC": "AesCbcParams",
+      "AES-CTR": "AesCtrParams",
     },
     "decrypt": {
       "RSA-OAEP": "RsaOaepParams",
       "AES-CBC": "AesCbcParams",
+      "AES-CTR": "AesCtrParams",
     },
     "get key length": {
       "AES-CBC": "AesDerivedKeyParams",
@@ -605,6 +607,39 @@
           // 6.
           return plainText.buffer;
         }
+        case "AES-CTR": {
+          normalizedAlgorithm.counter = copyBuffer(normalizedAlgorithm.counter);
+
+          // 1.
+          if (normalizedAlgorithm.counter.byteLength !== 16) {
+            throw new DOMException(
+              "Counter vector must be 16 bytes",
+              "OperationError",
+            );
+          }
+
+          // 2.
+          if (
+            normalizedAlgorithm.length === 0 || normalizedAlgorithm.length > 128
+          ) {
+            throw new DOMException(
+              "Counter length must not be 0 or greater than 128",
+              "OperationError",
+            );
+          }
+
+          // 3.
+          const cipherText = await core.opAsync("op_crypto_decrypt", {
+            key: keyData,
+            algorithm: "AES-CTR",
+            keyLength: key[_algorithm].length,
+            counter: normalizedAlgorithm.counter,
+            ctrLength: normalizedAlgorithm.length,
+          }, data);
+
+          // 4.
+          return cipherText.buffer;
+        }
         default:
           throw new DOMException("Not implemented", "NotSupportedError");
       }
@@ -3431,6 +3466,39 @@
         // 4.
         return cipherText.buffer;
       }
+      case "AES-CTR": {
+        normalizedAlgorithm.counter = copyBuffer(normalizedAlgorithm.counter);
+
+        // 1.
+        if (normalizedAlgorithm.counter.byteLength !== 16) {
+          throw new DOMException(
+            "Counter vector must be 16 bytes",
+            "OperationError",
+          );
+        }
+
+        // 2.
+        if (
+          normalizedAlgorithm.length == 0 || normalizedAlgorithm.length > 128
+        ) {
+          throw new DOMException(
+            "Counter length must not be 0 or greater than 128",
+            "OperationError",
+          );
+        }
+
+        // 3.
+        const cipherText = await core.opAsync("op_crypto_encrypt", {
+          key: keyData,
+          algorithm: "AES-CTR",
+          keyLength: key[_algorithm].length,
+          counter: normalizedAlgorithm.counter,
+          ctrLength: normalizedAlgorithm.length,
+        }, data);
+
+        // 4.
+        return cipherText.buffer;
+      }
       default:
         throw new DOMException("Not implemented", "NotSupportedError");
     }