how to encrypt string using AES 256, ECB mode with padding pkcs5?

Question

I'm new to iOS and I don't have idea about how to encrypt string using AES 256 with ECB mode and padding I take look of cryptoswift but I get error of key length I have 64 character key and I'm not able to encrypt

func aes_Encrypt(AES_KEY: String) -> String {
    var result = ""
    do {
        let key: [UInt8] = Array(AES_KEY.utf8) as [UInt8]
        let aes = try! AES(key: key, blockMode: ECB() as BlockMode, padding: .pkcs5) 
        let encrypted = try aes.encrypt(Array(self.utf8))
        result = encrypted.toHexString()
        print("AES Encryption Result: \(result)")
    } catch {
        print("Error: \(error)")
    }
    return result
}

Don't use the ECB mode it is insecure. Use at least CBC or CTR mode or prefer the AES-GCM mode. — kelalaka, Jan 23 '19 at 08:27

score 0 · Answer 1 · answered Jan 23 '19 at 07:30

0

64 characters × 8 bits = 512 bits, not the 256 required for AES256.

If the string you are passing in is a hexadecimal representation of a key (e.g. "1234abcd…"), you will need to break it into a sequence of two-character substrings and use UInt8(…, radix:16) to parse each one as hexadecimal.

answered Jan 23 '19 at 07:30

i have 5 (e.g. "12345") character key and convert it into 16 byte SHA 256 can you please provide code for that – kruti Jan 24 '19 at 03:35

how to encrypt string using AES 256, ECB mode with padding pkcs5?

1 Answers1