An out-of-the-box cryptographic message communication.
import(
"github.com/UedaTakeyuki/message"
)
// original message
const originalMessage = "some plaintext"
// an aad for AESGCM
var aad = []byte("Some AAD data")
// keys
var key_256 = []byte("01234567890123456789012345678901")
var key_192 = []byte("012345678901234567890123")
var key_128 = []byte("0123456789012345")
// encript by AESCTR with 256 bit key
crypticmessage, mac, err := message.EncriptStringByAESCTR(key_256, originalMessage)
// decript
decriptedmessage, err2 := message.DecriptStringByAESCTR(key_256, crypticmessage)
For more examples, refer Test_02_test.go and Test_03_test.go
import(
"github.com/UedaTakeyuki/message"
)
func encriptAndEncode(plainmessage []byte) (crypticmessage string) {
// new AESCTR
m := new(message.AESCTR)
// set key
m.SetKey([]byte("01234567890123456789012345678901"))
// set plainmessage for encription
m.SetPlainMessage(plainmessage)
// get criptic message
crypticmessage = m.GetEncodedEncriptedMessage()
log.Println("crypticmessage:", crypticmessage)
return
}
func decodeAndDecript(crypticmessage string) {
// new AESCTR
m := new(message.AESCTR)
// set key
m.SetKey([]byte("01234567890123456789012345678901"))
// set criptic message string
m.SetEncodedEncriptedMessage(crypticmessage)
// get original message from cryptic message
decreiptedMessage := m.GetDecriptedMessage()
log.Println("decreiptedMessage:", string(decreiptedMessage))
}
func main(){
crypticmessage, mac := encriptAndEncode([]byte(originalMessage))
decodeAndDecript(crypticmessage, mac)
}
Output message:
crypticmessage: L0z3LU3pmWNUvGr-w1eSzRLZpcuajcjy84Qa4Zq1
decreiptedMessage: some plaintext
import(
"github.com/UedaTakeyuki/message"
)
func encriptAndEncode(plainmessage []byte) (crypticmessage string, mac string) {
// new AESCTR
m := new(message.AESCTR)
// set key
m.SetKey([]byte("01234567890123456789012345678901"))
// set plainmessage for encription
m.SetPlainMessage(plainmessage)
// get criptic message
crypticmessage = m.GetEncodedEncriptedMessage()
log.Println("crypticmessage:", crypticmessage)
// get Authentication Code of this message
mac = m.GetPlainMessageMac()
log.Println("hmac of plaintext:", mac)
return
}
func decodeAndDecript(crypticmessage string, mac string) {
// new AESCTR
m := new(message.AESCTR)
// set key
m.SetKey([]byte("01234567890123456789012345678901"))
// set criptic message string
m.SetEncodedEncriptedMessage(crypticmessage)
// get original message from cryptic message
decreiptedMessage := m.GetDecriptedMessage()
log.Println("decreiptedMessage:", string(decreiptedMessage))
// confirm Authentication Code
result, _ := m.ConfirmMacFromstring(mac)
log.Println("Confrimation result is", result)
}
func main(){
crypticmessage, mac := encriptAndEncode([]byte(originalMessage))
decodeAndDecript(crypticmessage, mac)
}
Output message:
crypticmessage: L0z3LU3pmWNUvGr-w1eSzRLZpcuajcjy84Qa4Zq1
hmac of plaintext: cdd1aba74001d40e980de7cee69dc10d8495a609936bc835da4b30cb33ab6f50
decreiptedMessage: some plaintext
Confrimation result is true
For more examples, refer Test_01_test.go
According to this answer, I've expressed global functions with stereotype.
- AES CTR + HMAC (encription: AES CTR, message authentication: HMAC)
- AESGCM (both encription and message authentication are supported by AES GCM)