Security-59754.41.1.tar.gz

[apple/security.git] / OSX / libsecurity_keychain / lib / LegacyAPICounts.m

diff --git a/OSX/libsecurity_keychain/lib/LegacyAPICounts.m b/OSX/libsecurity_keychain/lib/LegacyAPICounts.m
new file mode 100644 (file)
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+++ b/OSX/libsecurity_keychain/lib/LegacyAPICounts.m
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2020 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#import <os/feature_private.h>
+#import <sys/codesign.h>
+
+#import "LegacyAPICounts.h"
+#import "utilities/SecCoreAnalytics.h"
+#import "SecEntitlements.h"
+#import "debugging.h"
+#import "SecInternalReleasePriv.h"
+
+#pragma mark - File-Private
+
+static NSString* applicationIdentifierForSelf() {
+    NSString* identifier = nil;
+    SecTaskRef task = SecTaskCreateFromSelf(kCFAllocatorDefault);
+
+    if (task) {
+        CFStringRef val = (CFStringRef)SecTaskCopyValueForEntitlement(task, kSecEntitlementApplicationIdentifier, NULL);
+        if (val && CFGetTypeID(val) != CFStringGetTypeID()) {
+            CFRelease(val);
+        } else {
+            identifier = CFBridgingRelease(val);
+        }
+
+        // security tool doesn't have entitlements, I wonder if there are more.
+        if (!identifier) {
+            identifier = CFBridgingRelease(SecTaskCopySigningIdentifier(task, NULL));
+        }
+
+        CFRelease(task);
+    }
+
+    return identifier;
+}
+
+static BOOL countLegacyAPIEnabledForThread() {
+    NSNumber* value = [[NSThread currentThread] threadDictionary][@"countLegacyAPIEnabled"];
+
+    // No value means not set at all, so not disabled by SecItem*
+    if (!value || (value && [value isKindOfClass:[NSNumber class]] && [value boolValue])) {
+        return YES;
+    }
+    return NO;
+}
+
+#pragma mark - SPI
+
+void setCountLegacyAPIEnabledForThread(bool value) {
+    [[NSThread currentThread] threadDictionary][@"countLegacyAPIEnabled"] = value ? @YES : @NO;
+}
+
+void countLegacyAPI(dispatch_once_t* token, const char* api) {
+    static NSString* identifier;
+    static BOOL shouldCount;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        identifier = applicationIdentifierForSelf() ?: @"unknown";
+        shouldCount = os_feature_enabled(Security, LegacyAPICounts);
+    });
+
+    if (api == nil) {
+        secerror("LegacyAPICounts: Attempt to count API without name");
+        return;
+    }
+
+    if (!shouldCount || !countLegacyAPIEnabledForThread()) {
+        return;
+    }
+
+    dispatch_once(token, ^{
+        NSString* apiStringObject = [NSString stringWithCString:api encoding:NSUTF8StringEncoding];
+        if (!apiStringObject) {
+            secerror("LegacyAPICounts: Surprisingly, char* for api name \"%s\" did not turn into NSString", api);
+            return;
+        }
+
+        [SecCoreAnalytics sendEventLazy:@"com.apple.security.LegacyAPICounts" builder:^NSDictionary<NSString *,NSObject *> * _Nonnull{
+            return @{
+                @"app" : identifier,
+                @"api" : apiStringObject,
+            };
+        }];
+    });
+}