1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsKeychainMigrationUtils.h"
#include <Security/Security.h>
#include "mozilla/Logging.h"
#include "nsCocoaUtils.h"
#include "nsString.h"
using namespace mozilla;
LazyLogModule gKeychainUtilsLog("keychainmigrationutils");
NS_IMPL_ISUPPORTS(nsKeychainMigrationUtils, nsIKeychainMigrationUtils)
NS_IMETHODIMP
nsKeychainMigrationUtils::GetGenericPassword(const nsACString& aServiceName,
const nsACString& aAccountName, nsACString& aKey) {
// To retrieve a secret, we create a CFDictionary of the form:
// { class: generic password,
// service: the given service name
// account: the given account name,
// match limit: match one,
// return attributes: true,
// return data: true }
// This searches for and returns the attributes and data for the secret
// matching the given service and account names. We then extract the data
// (i.e. the secret) and return it.
NSDictionary* searchDictionary = @{
(__bridge NSString*)kSecClass : (__bridge NSString*)kSecClassGenericPassword,
(__bridge NSString*)kSecAttrService : nsCocoaUtils::ToNSString(aServiceName),
(__bridge NSString*)kSecAttrAccount : nsCocoaUtils::ToNSString(aAccountName),
(__bridge NSString*)kSecMatchLimit : (__bridge NSString*)kSecMatchLimitOne,
(__bridge NSString*)kSecReturnAttributes : @YES,
(__bridge NSString*)kSecReturnData : @YES
};
CFTypeRef item;
// https://developer.apple.com/documentation/security/1398306-secitemcopymatching
OSStatus rv = SecItemCopyMatching((__bridge CFDictionaryRef)searchDictionary, &item);
if (rv != errSecSuccess) {
MOZ_LOG(gKeychainUtilsLog, LogLevel::Debug, ("SecItemCopyMatching failed: %d", rv));
return NS_ERROR_FAILURE;
}
NSDictionary* resultDict = [(__bridge NSDictionary*)item autorelease];
NSData* secret = [resultDict objectForKey:(__bridge NSString*)kSecValueData];
if (!secret) {
MOZ_LOG(gKeychainUtilsLog, LogLevel::Debug, ("objectForKey failed"));
return NS_ERROR_FAILURE;
}
if ([secret length] != 0) {
// We assume that the data is UTF-8 encoded since that seems to be common and
// Keychain Access shows it with that encoding.
aKey.Assign(reinterpret_cast<const char*>([secret bytes]), [secret length]);
}
return NS_OK;
}
|
