Question

我有一个对称密钥，我想存储在OS X钥匙串中。存储密码和用户名工作正常，所以我更改了我的代码存储我想要稍后由我的应用程序使用的对称密钥。我使用以下代码作为回应：

指定的属性不存在。

这是我的代码：

// Identifier for symmetric key
static const uint8_t keyIdentfier[] = "net.eurobertics.TestKey";
NSData *tag = [[NSData alloc] initWithBytes:keyIdentfier length:sizeof(keyIdentfier)];

// Simple keygen algo - JUST FOR EXAMPLE DO NOT USE!
NSMutableData *key = [NSMutableData dataWithLength:8];
SecRandomCopyBytes(kSecRandomDefault, 8, key.mutableBytes);
NSString *base64key = [key base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

// Dictionary for keychain - insert a symmetric key with following attributes
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:(id)kSecClassKey forKey:(id)kSecClass];
[dict setObject:tag forKey:(id)kSecAttrApplicationTag];
[dict setObject:[NSNumber numberWithUnsignedInteger:CSSM_ALGID_AES] forKey:(id)kSecAttrKeyType];
[dict setObject:[NSNumber numberWithUnsignedInteger:(unsigned int)(kCCKeySizeAES128 << 3)] forKey:(id)kSecAttrKeySizeInBits];
[dict setObject:[NSNumber numberWithUnsignedInteger:(unsigned int)(kCCKeySizeAES128 << 3)] forKey:(id)kSecAttrEffectiveKeySize];
[dict setObject:(id)kCFBooleanTrue forKey:(id)kSecAttrCanEncrypt];
[dict setObject:(id)kCFBooleanTrue forKey:(id)kSecAttrCanDecrypt];
[dict setObject:(id)kCFBooleanFalse forKey:(id)kSecAttrCanSign];
[dict setObject:(id)kCFBooleanFalse forKey:(id)kSecAttrCanVerify];
[dict setObject:(id)kCFBooleanFalse forKey:(id)kSecAttrCanWrap];
[dict setObject:(id)kCFBooleanFalse forKey:(id)kSecAttrCanUnwrap];
[dict setObject:(id)kCFBooleanFalse forKey:(id)kSecAttrCanDerive];
[dict setObject:key forKey:(id)kSecValueData];

// Insert key into keychain based on dictionary attributes above
OSStatus osstatus = SecItemAdd((__bridge CFDictionaryRef)dict, NULL);

// Set responsefield
[[self responseField] setStringValue:[NSString stringWithFormat:@"Key: %@\n\nStatus: %@", base64key, SecCopyErrorMessageString(osstatus, NULL)]];

我知道 SecItemAdd 主要用于iOS，但我想稍后将我的应用移植到iOS 我希望更兼容。将密钥存储在默认（通常是登录）密钥链中对我来说绝对没问题，因为我会定期使用我的应用程序的密钥。

Answer 1

我发现了为什么这个问题不适用于我的另一个问题：

Storing a symmetric key in OS X keychain programmatically

希望它有助于某人

以编程方式在OS X钥匙串中存储对称密钥

1 个答案: