4c57d201a4
The source headers, LICENSE files, and license metadata had drifted apart. Align the entire project to MIT: - Convert every source-file header to the MIT text across all comment styles (Go, TS, TSX, JS, MJS, SQL, CSS, GraphQL, shell), including SPDX-License-Identifier tags - Set the root and cookie-banner LICENSE files to the MIT text with a "MIT License" title line - Switch the package.json license fields, Docker image label, and cookie-banner README to MIT - Update docs and the genmodels header generator accordingly - Normalize copyright lines to a single format (Copyright (c) <year(s)> Probo Inc <hello@probo.com>.): unify the hello@getprobo.com and hello@probo.inc emails to hello@probo.com and the comma-separated years to a hyphenated range Genuine third-party references are intentionally left untouched: the Lucide icon attributions (Lucide is ISC) and the trivy dependency license allowlist. Signed-off-by: Sacha Al Himdani <sacha@probo.com>
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package cipher
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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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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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)
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type (
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EncryptionKey [32]byte
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)
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func (k EncryptionKey) Bytes() []byte {
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return k[:]
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}
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func (k *EncryptionKey) UnmarshalJSON(data []byte) error {
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var key string
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if err := json.Unmarshal(data, &key); err != nil {
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return err
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}
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return k.UnmarshalText([]byte(key))
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}
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func (k *EncryptionKey) UnmarshalText(text []byte) error {
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decoded, err := base64.StdEncoding.DecodeString(string(text))
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if err != nil {
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return fmt.Errorf("cannot decode base64 key: %w", err)
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}
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if len(decoded) != 32 {
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return fmt.Errorf("key must be 32 bytes for AES-256, got %d bytes after base64 decoding", len(decoded))
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}
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copy(k[:], decoded)
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return nil
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}
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func (k EncryptionKey) MarshalJSON() ([]byte, error) {
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return json.Marshal(base64.StdEncoding.EncodeToString(k[:]))
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}
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func Encrypt(data []byte, key EncryptionKey) ([]byte, error) {
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block, err := aes.NewCipher(key.Bytes())
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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, 12)
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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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aesgcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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ciphertext := aesgcm.Seal(nonce, nonce, data, nil)
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return ciphertext, nil
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}
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func Decrypt(data []byte, key EncryptionKey) ([]byte, error) {
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block, err := aes.NewCipher(key.Bytes())
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if err != nil {
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return nil, err
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}
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aesgcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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if len(data) < 12 {
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return nil, fmt.Errorf("ciphertext too short")
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}
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nonce, ciphertext := data[:12], data[12:]
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plaintext, err := aesgcm.Open(nil, nonce, ciphertext, nil)
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if err != nil {
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return nil, fmt.Errorf("cannot decrypt: %w", err)
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}
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return plaintext, nil
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}
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