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btcec: update comment [skip ci]

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yemmyharry 2024-04-18 15:31:41 +01:00
parent 1b9b22f31d
commit 902f456c90
1 changed files with 5 additions and 2 deletions
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7
btcec/ciphering.go
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@ -22,7 +22,9 @@ func GenerateSharedSecret(privkey *PrivateKey, pubkey *PublicKey) []byte {
return secp.GenerateSharedSecret(privkey, pubkey)
}
// Encrypt encrypts data for the target public key using AES-128-GCM
// Encrypt encrypts a message using a public key, returning the encrypted message or an error.
// It generates an ephemeral key, derives a shared secret and an encryption key, then encrypts the message using AES-GCM.
// The ephemeral public key, nonce, tag and encrypted message are then combined and returned as a single byte slice.
func Encrypt(pubKey *PublicKey, msg []byte) ([]byte, error) {
var pt bytes.Buffer
@ -64,7 +66,8 @@ func Encrypt(pubKey *PublicKey, msg []byte) ([]byte, error) {
return pt.Bytes(), nil
}
// Decrypt decrypts a passed message with a receiver private key, returns plaintext or decryption error
// Decrypt decrypts data that was encrypted using the Encrypt function.
// The decrypted message is returned if the decryption is successful, or an error is returned if there are any issues.
func Decrypt(privkey *PrivateKey, msg []byte) ([]byte, error) {
// Message cannot be less than length of public key (65) + nonce (16) + tag (16)
if len(msg) <= (1 + 32 + 32 + 16 + 16) {