102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
package crypto
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"io"
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)
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type CryptoService struct {
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privateKey *rsa.PrivateKey
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Vault *VaultManager
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}
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func NewCryptoService() (*CryptoService, error) {
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vault, err := NewVaultManager()
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if err != nil {
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return nil, err
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}
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// Загрузка приватного ключа из Vault
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keyBytes, err := vault.GetMasterPrivateKey()
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if err != nil {
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return nil, err
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}
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privateKey, err := x509.ParsePKCS1PrivateKey(keyBytes)
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if err != nil {
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return nil, err
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}
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return &CryptoService{
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privateKey: privateKey,
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Vault: vault,
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}, nil
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}
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// Шифрование сообщения
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func (cs *CryptoService) EncryptMessage(content string) ([]byte, []byte, []byte, error) {
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// Генерация сессионного AES ключа
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aesKey := make([]byte, 32)
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if _, err := rand.Read(aesKey); err != nil {
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return nil, nil, nil, err
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}
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// Шифрование сообщения AES-GCM
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block, err := aes.NewCipher(aesKey)
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if err != nil {
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return nil, nil, nil, err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, nil, nil, err
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}
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nonce := make([]byte, gcm.NonceSize())
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if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
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return nil, nil, nil, err
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}
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encryptedContent := gcm.Seal(nonce, nonce, []byte(content), nil)
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// Шифрование AES ключа RSA-OAEP
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encryptedKey, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, &cs.privateKey.PublicKey, aesKey, nil)
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if err != nil {
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return nil, nil, nil, err
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}
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return encryptedContent, encryptedKey, nonce, nil
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}
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// Расшифровка сообщения
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func (cs *CryptoService) DecryptMessage(encryptedContent, encryptedKey, nonce []byte) (string, error) {
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// Расшифровка AES ключа
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aesKey, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, cs.privateKey, encryptedKey, nil)
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if err != nil {
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return "", err
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}
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// Расшифровка сообщения
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block, err := aes.NewCipher(aesKey)
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if err != nil {
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return "", err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return "", err
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}
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plaintext, err := gcm.Open(nil, nonce, encryptedContent, nil)
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if err != nil {
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return "", err
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}
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return string(plaintext), nil
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}
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