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keys.go
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keys.go
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/* license: https://mit-license.org
* ==============================================================================
* The MIT License (MIT)
*
* Copyright (c) 2020 Albert Moky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* ==============================================================================
*/
package crypto
import (
"bytes"
. "github.com/dimchat/mkm-go/crypto/format"
. "github.com/dimchat/mkm-go/crypto/types"
)
/**
* Cryptography Key
* ~~~~~~~~~~~~~~~~
* Cryptography key with designated algorithm
*
* key data format: {
* algorithm : "RSA", // ECC, AES, ...
* data : "{BASE64_ENCODE}",
* ...
* }
*/
type CryptographyKey interface {
Map
/**
* Get key algorithm name
*
* @return algorithm name
*/
Algorithm() string
/**
* Get key data
*
* @return key data
*/
Data() []byte
}
type EncryptKey interface {
/**
* ciphertext = encrypt(plaintext, PW)
* ciphertext = encrypt(plaintext, PK)
*
* @param plaintext - plain data
* @return ciphertext
*/
Encrypt(plaintext []byte) []byte
}
type DecryptKey interface {
/**
* plaintext = decrypt(ciphertext, PW);
* plaintext = decrypt(ciphertext, SK);
*
* @param ciphertext - encrypted data
* @return plaintext
*/
Decrypt(ciphertext []byte) []byte
/**
* OK = decrypt(encrypt(data, SK), PK) == data
*
* @param pKey - public key
* @return true on signature matched
*/
Match(pKey EncryptKey) bool
}
type SignKey interface {
/**
* signature = sign(data, SK);
*
* @param data - data to be signed
* @return signature
*/
Sign(data []byte) []byte
}
type VerifyKey interface {
/**
* OK = verify(data, signature, PK)
*
* @param data - data
* @param signature - signature of data
* @return true on signature matched
*/
Verify(data []byte, signature []byte) bool
/**
* OK = verify(data, sign(data, SK), PK)
*
* @param sKey - private key
* @return true on signature matched
*/
Match(sKey SignKey) bool
}
const _promise = "Moky loves May Lee forever!"
var promise = UTF8Encode(_promise)
func CryptographyKeysMatch(pKey EncryptKey, sKey DecryptKey) bool {
// check by encryption
ciphertext := pKey.Encrypt(promise)
plaintext := sKey.Decrypt(ciphertext)
return bytes.Equal(plaintext, promise)
}
func CryptographyKeyGetAlgorithm(key map[string]interface{}) string {
return key["algorithm"].(string)
}