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Rename c_hash to c_s256 per OIDC key binding spec update #98

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Merged
rohanharikr merged 1 commit into from
Mar 6, 2026
Merged

Rename c_hash to c_s256 per OIDC key binding spec update #98

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6 changes: 3 additions & 3 deletions src/App.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -227,7 +227,7 @@
// Import the private JWK to a CryptoKey for signing using the stored algorithm
const signingKey = await jose.importJWK(privateKey, algorithm || 'EdDSA');
// Create a minimal DPoP proof JWT (RFC 9449)
// Generate SHA256 hash of the code for c_hash
// Generate SHA256 hash of the code for c_s256
// Convert to BASE64URL as per spec section 1.8
const codeHash = await crypto.subtle
.digest('SHA-256', new TextEncoder().encode(code))
Expand All @@ -239,7 +239,7 @@
);

const dpopPayload = {
c_hash: codeHash,
c_s256: codeHash,
jti: crypto.randomUUID(),
iat: Math.floor(Date.now() / 1000),
htu: url.href,
Expand Down Expand Up @@ -360,7 +360,7 @@
'Content-Type': 'application/x-www-form-urlencoded'
};

// Generate DPoP proof for refresh (no c_hash needed)
// Generate DPoP proof for refresh (no c_s256 needed)
const isDpopEnabled =
selectedScopes.includes('bound_key') && selectedProtocolParams.includes('dpop_jkt');
if (isDpopEnabled) {
Expand Down