Rust

AES-CMAC

See more Encryption Examples

Demonstrates using the AES-CMAC algorithm, which is a keyed hash function similar to HMAC and Poly1305.

Note: Chilkat added AES-CMAC in version 9.5.0.95.

Rust

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let crypt = chilkat::Crypt2::new();

// Set the MAC algorithm to AES-CMAC
crypt.set_mac_algorithm("aes-cmac");

// AES-CMAC always uses a 16-byte (128-bit) MAC key.
let key_hex = "2b7e151628aed2a6abf7158809cf4f3c".to_string();
let _ = crypt.set_mac_key_encoded(&key_hex, "hex").is_ok();

// Let's compute the AES-CMAC for the test vector at https://www.rfc-editor.org/rfc/rfc4493#appendix-A
// Here we have 64 bytes in hex representation.
let message_bytes = "6bc1bee22e409f96e93d7e117393172aae2d8a571e03ac9c9eb76fac45af8e5130c81c46a35ce411e5fbc1191a0a52eff69f2445df4f9b17ad2b417be66c3710".to_string();

let bd = chilkat::BinData::new();
let _ = bd.append_encoded(&message_bytes, "hex");

// Compute the AES-CMAC for the bytes contained in bd and return the AES-CMAC in hex representation.
crypt.set_encoding_mode("hex_lower");
let cmac = crypt.mac_bd_enc(&bd).unwrap_or_default();
println!("{}", cmac);
// Output should be: 51f0bebf7e3b9d92fc49741779363cfe

// Now do the same for a string:
let plain_text = "'Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.".to_string();
let enc_tag = crypt.mac_string_enc(&plain_text).unwrap_or_default();
println!("{}", enc_tag);

// Output should be: 4fca1fcbd265048d247f99ab57fa3ceb