25 lines
547 B
Go
25 lines
547 B
Go
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package encryption
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import (
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"crypto/rand"
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"golang.org/x/crypto/chacha20poly1305"
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"io"
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)
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func Encrypt(key, plaintextMsg []byte) ([]byte, error) {
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aead, err := chacha20poly1305.New(key)
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if err != nil {
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return nil, err
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}
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// Generate a new nonce for this encryption.
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nonce := make([]byte, aead.NonceSize())
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if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
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return nil, err
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}
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// Encrypt the message and append the nonce and the ciphertext.
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ciphertext := aead.Seal(nonce, nonce, plaintextMsg, nil)
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return ciphertext, nil
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}
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