mirror of
https://github.com/gravitational/teleport.git
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72 lines
2.5 KiB
Objective-C
72 lines
2.5 KiB
Objective-C
//go:build touchid
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// +build touchid
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/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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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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