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D7006.1765312882.diff
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diff --git a/native/expo-modules/aes-crypto/ios/AESCryptoModule.swift b/native/expo-modules/aes-crypto/ios/AESCryptoModule.swift
--- a/native/expo-modules/aes-crypto/ios/AESCryptoModule.swift
+++ b/native/expo-modules/aes-crypto/ios/AESCryptoModule.swift
@@ -11,6 +11,7 @@
Function("generateKey", generateKey)
Function("encrypt", encrypt)
+ Function("decrypt", decrypt)
}
}
@@ -51,6 +52,20 @@
sealedData.copyBytes(to: destination.rawBufferPtr())
}
+private func decrypt(rawKey: Uint8Array,
+ sealedData: Uint8Array,
+ destination: Uint8Array) throws {
+ guard destination.byteLength == sealedData.byteLength - IV_LENGTH - TAG_LENGTH
+ else {
+ throw InvalidDataLengthException()
+ }
+
+ let key = SymmetricKey(data: rawKey.data())
+ let sealedBox = try AES.GCM.SealedBox(combined: sealedData.data())
+ let plaintext = try AES.GCM.open(sealedBox, using: key)
+ plaintext.copyBytes(to: destination.rawBufferPtr())
+}
+
// MARK: - Utilities
extension TypedArray {
diff --git a/native/utils/aes-crypto-module.js b/native/utils/aes-crypto-module.js
--- a/native/utils/aes-crypto-module.js
+++ b/native/utils/aes-crypto-module.js
@@ -14,6 +14,11 @@
data: Uint8Array,
destination: Uint8Array,
) => void,
+ +decrypt: (
+ key: Uint8Array,
+ data: Uint8Array,
+ destination: Uint8Array,
+ ) => void,
} = requireNativeModule('AESCrypto');
export function generateKey(): Uint8Array {
@@ -28,3 +33,11 @@
AESCryptoModule.encrypt(key, data, sealedDataBuffer);
return sealedDataBuffer;
}
+
+export function decrypt(key: Uint8Array, data: Uint8Array): Uint8Array {
+ invariant(AESCryptoModule.decrypt, 'AESCrypto.decrypt is not implemented');
+ invariant(data.length >= IV_LENGTH + TAG_LENGTH, 'Invalid data length');
+ const plaintextBuffer = new Uint8Array(data.length - IV_LENGTH - TAG_LENGTH);
+ AESCryptoModule.decrypt(key, data, plaintextBuffer);
+ return plaintextBuffer;
+}

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