AES Encryption

AES_CodeSnippet.swift

    fileprivate func encryptionAES(data: Data, key: Data, IV: Data) -> String? {
        var numberOfBytesEncrypted : size_t = 0
        let size = data.count + kCCKeySizeAES128
        var encrypted = Data(count: size)
        let cryptStatus = IV.withUnsafeBytes { ivBytes in
            encrypted.withUnsafeMutableBytes { encryptedBytes in
                data.withUnsafeBytes { dataBytes in
                    key.withUnsafeBytes { keyBytes in
                        CCCrypt(CCOperation(kCCEncrypt), CCAlgorithm(kCCAlgorithmAES), CCOptions(kCCOptionPKCS7Padding), keyBytes, key.count, ivBytes, dataBytes, data.count, encryptedBytes, size, &numberOfBytesEncrypted)
                    }
                }
            }
        }
        
        if cryptStatus == Int32(kCCSuccess) {
            encrypted.count = numberOfBytesEncrypted
            return encrypted.base64EncodedString()
        } else {
            return nil
        }
    }