From 9f0a9a6779f00786e4728ad5c3fad36814a293b0 Mon Sep 17 00:00:00 2001
From: Guillermo Serrahima <dev@vylion.com>
Date: Sat, 11 Apr 2026 07:40:30 +0200
Subject: project restructure

---
 backend/auth/dpop.go | 83 ----------------------------------------------------
 1 file changed, 83 deletions(-)
 delete mode 100644 backend/auth/dpop.go

(limited to 'backend/auth/dpop.go')

diff --git a/backend/auth/dpop.go b/backend/auth/dpop.go
deleted file mode 100644
index 2a8f6ed..0000000
--- a/backend/auth/dpop.go
+++ /dev/null
@@ -1,83 +0,0 @@
-package auth
-
-import (
-	"crypto"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"encoding/base64"
-	"time"
-
-	"github.com/golang-jwt/jwt/v5"
-)
-
-type DPoPKeyPair struct {
-	PrivateKey *ecdsa.PrivateKey
-	PublicKey  *ecdsa.PublicKey
-	JWK        map[string]string
-}
-
-func GenerateDPoPKeyPair() (*DPoPKeyPair, error) {
-	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-	if err != nil {
-		return nil, err
-	}
-
-	jwk := map[string]string{
-		"kty": "EC",
-		"crv": "P-256",
-		"x":   base64.RawURLEncoding.EncodeToString(privateKey.PublicKey.X.Bytes()),
-		"y":   base64.RawURLEncoding.EncodeToString(privateKey.PublicKey.Y.Bytes()),
-	}
-
-	return &DPoPKeyPair{
-		PrivateKey: privateKey,
-		PublicKey:  &privateKey.PublicKey,
-		JWK:        jwk,
-	}, nil
-}
-
-func (kp *DPoPKeyPair) GenerateDPoPProof(method, url, nonce string) (string, error) {
-	// generate unique ID for this proof
-	jti, err := GenerateRandomToken()
-	if err != nil {
-		return "", err
-	}
-
-	// create JWT header with JWK
-	header := map[string]interface{}{
-		"typ": "dpop+jwt",
-		"alg": "ES256",
-		"jwk": kp.JWK,
-	}
-
-	// create JWT claims
-	claims := jwt.MapClaims{
-		"jti": jti,
-		"htm": method,  // HTTP method (GET, POST, etc)
-		"htu": url,     // HTTP URL (the endpoint you're calling)
-		"iat": time.Now().Unix(),
-	}
-
-	// add nonce if provided
-	if nonce != "" {
-		claims["nonce"] = nonce
-	}
-
-	// create token with custom header
-	token := jwt.NewWithClaims(&jwt.SigningMethodECDSA{
-		Name:      "ES256",
-		Hash:      crypto.SHA256,
-		KeySize:   32,
-		CurveBits: 256,
-	}, claims)
-	token.Header = header
-
-	// sign with private key
-	tokenString, err := token.SignedString(kp.PrivateKey)
-	if err != nil {
-		return "", err
-	}
-
-	return tokenString, nil
-}
-- 
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