SakurasanandClaude Sonnet 5
d0e31b198f
Gin + GORM + pure-Go SQLite. Users/auth (JWT), API key management with quotas, proxy gateway with weighted channel failover and health checks, usage/billing ledger, cross-protocol conversion (Anthropic Messages / OpenAI Chat Completions / OpenAI Responses), and channel/model admin API. Channels declare native API formats and auto-convert the rest. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
65 lines
1.6 KiB
Go
65 lines
1.6 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/sha256"
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"encoding/base64"
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"errors"
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"fmt"
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"io"
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)
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// Encrypt seals a secret with AES-GCM. The master key can be any string;
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// it is hashed to a fixed-size AES key.
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func Encrypt(plaintext, masterKey string) (string, error) {
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key := sha256.Sum256([]byte(masterKey))
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block, err := aes.NewCipher(key[:])
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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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nonce := make([]byte, gcm.NonceSize())
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if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
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return "", err
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}
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sealed := gcm.Seal(nonce, nonce, []byte(plaintext), nil)
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return base64.StdEncoding.EncodeToString(sealed), nil
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}
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// Decrypt opens a ciphertext produced by Encrypt.
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func Decrypt(ciphertext, masterKey string) (string, error) {
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key := sha256.Sum256([]byte(masterKey))
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data, err := base64.StdEncoding.DecodeString(ciphertext)
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if err != nil {
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return "", err
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}
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block, err := aes.NewCipher(key[:])
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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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if len(data) < gcm.NonceSize() {
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return "", errors.New("ciphertext too short")
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}
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nonce, sealed := data[:gcm.NonceSize()], data[gcm.NonceSize():]
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plain, err := gcm.Open(nil, nonce, sealed, nil)
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if err != nil {
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return "", fmt.Errorf("decrypt failed (bad master key?): %w", err)
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}
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return string(plain), nil
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}
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// HashSHA256 returns the hex SHA-256 of a string (used for API key lookup).
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func HashSHA256(s string) string {
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sum := sha256.Sum256([]byte(s))
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return fmt.Sprintf("%x", sum)
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}
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