feat: introduce at_signing_algo and hashing_algo in at_auth_request and at_onboarding_request

packages/at_auth/lib/src/at_auth_impl.dart

@@ -74,9 +74,9 @@ class AtAuthImpl implements AtAuth {
     }
     atLookUp ??= AtLookupImpl(
         atAuthRequest.atSign, atAuthRequest.rootDomain, atAuthRequest.rootPort);
-    var atChops = _createAtChops(atAuthKeys);
-    this.atChops = atChops;
-    atLookUp!.atChops = atChops;
+    atLookUp?.signingAlgoType = atAuthRequest.signingAlgoType;
+    atLookUp?.hashingAlgoType = atAuthRequest.hashingAlgoType;
+    atLookUp!.atChops = atChops = _createAtChops(atAuthKeys);
     _logger.finer('Authenticating using PKAM');
     var isPkamAuthenticated = false;
     pkamAuthenticator ??= PkamAuthenticator(atAuthRequest.atSign, atLookUp!);
@@ -106,6 +106,8 @@ class AtAuthImpl implements AtAuth {
     atEnrollmentBase = AtEnrollmentImpl(atOnboardingRequest.atSign);
     atLookUp ??= AtLookupImpl(atOnboardingRequest.atSign,
         atOnboardingRequest.rootDomain, atOnboardingRequest.rootPort);
+    atLookUp?.signingAlgoType = atOnboardingRequest.signingAlgoType;
+    atLookUp?.hashingAlgoType = atOnboardingRequest.hashingAlgoType;
 
     //1. cram auth
     cramAuthenticator ??=

packages/at_auth/lib/src/auth/at_auth_request.dart

@@ -1,4 +1,5 @@
 import 'package:at_auth/src/keys/at_auth_keys.dart';
+import 'package:at_chops/at_chops.dart';
 import 'package:at_commons/at_commons.dart';
 
 /// Represents an authentication request of an atSign.
@@ -31,4 +32,10 @@ class AtAuthRequest {
 
   /// public key id from secure element if [authMode] is [PkamAuthMode.sim]
   String? publicKeyId;
+
+  /// Signing algorithm to use for pkam authentication
+  SigningAlgoType signingAlgoType = SigningAlgoType.rsa2048;
+
+  /// Hashing algorithm to use for pkam authentication
+  HashingAlgoType hashingAlgoType = HashingAlgoType.sha256;
 }

packages/at_auth/lib/src/onboard/at_onboarding_request.dart

@@ -1,3 +1,4 @@
+import 'package:at_chops/at_chops.dart';
 import 'package:at_commons/at_commons.dart';
 
 class AtOnboardingRequest {
@@ -13,4 +14,10 @@ class AtOnboardingRequest {
 
   /// public key id if [authMode] is [PkamAuthMode.sim]
   String? publicKeyId;
+
+  /// Signing algorithm to use for cram authentication
+  SigningAlgoType signingAlgoType = SigningAlgoType.rsa2048;
+
+  /// Hashing algorithm to use for cram authentication
+  HashingAlgoType hashingAlgoType = HashingAlgoType.sha256;
 }