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我有一个对称密钥，我想存储在OS X钥匙串中。 存储密码和用户名是完美的，所以我改变我的代码 存储一个对称密钥，我想稍后使用我的应用程序。 我用下面的代码给我作为回应：以编程方式在OS X钥匙串中存储对称密钥
指定的属性不存在。
这里是我的代码：
// 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主要是针对iOS的，但我想我的端口后应用到iOS所以 我想更兼容。将密钥存储在默认（通常是登录）钥匙串 对我来说绝对可以，因为我将通过我的应用程序定期使用密钥。