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>
99 lines
2.7 KiB
Go
99 lines
2.7 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 securetoken
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import (
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"crypto/hmac"
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"crypto/sha256"
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"crypto/subtle"
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"encoding/base64"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"go.probo.inc/probo/pkg/bearertoken"
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)
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var (
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ErrInvalidToken = errors.New("invalid token")
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ErrTokenNotFound = errors.New("token not found")
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ErrInvalidSignature = errors.New("invalid signature")
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)
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func Get(req *http.Request, secret string) (string, error) {
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v := req.Header.Get("Authorization")
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if v == "" {
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return "", ErrTokenNotFound
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}
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token, err := bearertoken.Parse(v)
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if err != nil {
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return "", ErrInvalidToken
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}
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value, err := Verify(token, secret)
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if err != nil {
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return "", ErrInvalidToken
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}
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return value, nil
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}
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// Sign creates a signed value using HMAC-SHA256
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func Sign(value, secret string) (string, error) {
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if secret == "" {
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return "", fmt.Errorf("secret cannot be empty")
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}
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h := hmac.New(sha256.New, []byte(secret))
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h.Write([]byte(value))
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signature := base64.RawURLEncoding.EncodeToString(h.Sum(nil))
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return value + "." + signature, nil
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}
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// Verify checks if a signed value is valid
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func Verify(signedValue, secret string) (string, error) {
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if secret == "" {
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return "", fmt.Errorf("secret cannot be empty")
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}
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parts := strings.Split(signedValue, ".")
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if len(parts) != 2 {
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return "", fmt.Errorf("invalid signed value format")
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}
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value := parts[0]
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expectedSignedValue, err := Sign(value, secret)
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if err != nil {
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return "", fmt.Errorf("cannot sign value: %w", err)
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}
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if subtle.ConstantTimeCompare([]byte(signedValue), []byte(expectedSignedValue)) != 1 {
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return "", ErrInvalidSignature
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}
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return value, nil
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}
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