mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-01 13:39:37 +08:00
Alan Parra
7dbefc24f9
Allow explicit Touch ID prompts to be triggered via Go code, which will be used to guard the (upcoming) credential picker prompt. To avoid double-prompting users during Touch ID authentication we have to set a grace period in the underlying LAContext and share it between the functions. Note that AuthContextGuard (native) uses the LAContext explicitly, whereas Authenticate (native) uses it through the SecItemCopyMatching query dictionary. No UX visible changes are made in the PR, despite the fact that prompting occurs a bit earlier. #13901 * Allow explicit Touch ID prompts
68 lines
2.4 KiB
Objective-C
68 lines
2.4 KiB
Objective-C
//go:build touchid
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// +build touchid
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// Copyright 2022 Gravitational, Inc
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "authenticate.h"
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#import <CoreFoundation/CoreFoundation.h>
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#import <Foundation/Foundation.h>
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#import <Security/Security.h>
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#include "common.h"
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#include "context.h"
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int Authenticate(AuthContext *actx, AuthenticateRequest req, char **sigB64Out,
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char **errOut) {
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NSData *appLabel = [NSData dataWithBytes:req.app_label
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length:strlen(req.app_label)];
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NSDictionary *query = @{
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(id)kSecClass : (id)kSecClassKey,
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(id)kSecAttrKeyType : (id)kSecAttrKeyTypeECSECPrimeRandom,
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(id)kSecMatchLimit : (id)kSecMatchLimitOne,
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(id)kSecReturnRef : @YES,
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(id)kSecAttrApplicationLabel : appLabel,
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// ctx takes effect in the SecKeyCreateSignature call below.
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(id)kSecUseAuthenticationContext : (id)GetLAContextFromAuth(actx),
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};
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SecKeyRef privateKey = NULL;
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OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query,
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(CFTypeRef *)&privateKey);
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if (status != errSecSuccess) {
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CFStringRef err = SecCopyErrorMessageString(status, NULL);
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NSString *nsErr = (__bridge_transfer NSString *)err;
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*errOut = CopyNSString(nsErr);
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return -1;
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}
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NSData *digest = [NSData dataWithBytes:req.digest length:req.digest_len];
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CFErrorRef error = NULL;
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CFDataRef sig = SecKeyCreateSignature(
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privateKey, kSecKeyAlgorithmECDSASignatureDigestX962SHA256,
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(__bridge CFDataRef)digest, &error);
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if (error) {
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NSError *nsError = (__bridge_transfer NSError *)error;
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*errOut = CopyNSString([nsError localizedDescription]);
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CFRelease(privateKey);
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return -1;
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}
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NSData *nsSig = (__bridge_transfer NSData *)sig;
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*sigB64Out = CopyNSString([nsSig base64EncodedStringWithOptions:0]);
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CFRelease(privateKey);
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return 0;
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}
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