LibTLS: Move SignatureAlgorithm to Extensions.h

Also add missing values from the IANA registry

Userland/Libraries/LibTLS/CipherSuite.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <AK/Types.h>
+#include <LibTLS/Extensions.h>
 
 namespace TLS {
 
@@ -105,14 +106,6 @@ enum class HashAlgorithm : u8 {
     SHA512 = 6,
 };
 
-// Defined in RFC 5246 section 7.4.1.4.1
-enum class SignatureAlgorithm : u8 {
-    Anonymous = 0,
-    RSA = 1,
-    DSA = 2,
-    ECDSA = 3,
-};
-
 // Defined in RFC 5246 section 7.4.1.4.1
 struct SignatureAndHashAlgorithm {
     HashAlgorithm hash;
@@ -158,7 +151,7 @@ constexpr SignatureAlgorithm signature_for_key_exchange_algorithm(KeyExchangeAlg
     case KeyExchangeAlgorithm::DH_anon:
     case KeyExchangeAlgorithm::ECDH_anon:
     default:
-        return SignatureAlgorithm::Anonymous;
+        return SignatureAlgorithm::ANONYMOUS;
     }
 }
 

Userland/Libraries/LibTLS/Extensions.h

@@ -257,6 +257,21 @@ enum class ECPointFormat : u8 {
     __ENUM_EC_POINT_FORMATS
 };
 
+// https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-16
+#define __ENUM_SIGNATURE_ALGORITHM         \
+    _ENUM_KEY_VALUE(ANONYMOUS, 0)          \
+    _ENUM_KEY_VALUE(RSA, 1)                \
+    _ENUM_KEY_VALUE(DSA, 2)                \
+    _ENUM_KEY_VALUE(ECDSA, 3)              \
+    _ENUM_KEY_VALUE(ED25519, 7)            \
+    _ENUM_KEY_VALUE(ED448, 8)              \
+    _ENUM_KEY_VALUE(GOSTR34102012_256, 64) \
+    _ENUM_KEY_VALUE(GOSTR34102012_512, 65)
+
+enum class SignatureAlgorithm : u8 {
+    __ENUM_SIGNATURE_ALGORITHM
+};
+
 #undef _ENUM_KEY
 #undef _ENUM_KEY_VALUE