59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
package push_notification_server
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/ecdsa"
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"github.com/status-im/status-go/eth-node/crypto"
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"golang.org/x/crypto/sha3"
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"io"
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)
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func hashPublicKey(pk *ecdsa.PublicKey) []byte {
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return shake256(crypto.CompressPubkey(pk))
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}
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func decrypt(cyphertext []byte, key []byte) ([]byte, error) {
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if len(cyphertext) < nonceLength {
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return nil, ErrInvalidCiphertextLength
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}
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c, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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gcm, err := cipher.NewGCM(c)
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if err != nil {
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return nil, err
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}
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nonce := cyphertext[:nonceLength]
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return gcm.Open(nil, nonce, cyphertext[nonceLength:], nil)
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}
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func encrypt(plaintext []byte, key []byte, reader io.Reader) ([]byte, error) {
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c, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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gcm, err := cipher.NewGCM(c)
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if err != nil {
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return nil, err
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}
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nonce := make([]byte, gcm.NonceSize())
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if _, err = io.ReadFull(reader, nonce); err != nil {
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return nil, err
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}
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return gcm.Seal(nonce, nonce, plaintext, nil), nil
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}
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func shake256(buf []byte) []byte {
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h := make([]byte, 64)
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sha3.ShakeSum256(h, buf)
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return h
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}
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