列出Mac OS X上的钥匙串中的条目

Question

在过去的几天里,我一直在玩Cocoa,我想知道如何列出我创建的钥匙串的所有名称/帐户对？Mac OS X附带的小钥匙链访问应用程序可以做到这一点,所以我认为它必须是可能的吗？SecItemCopyMatching我正在寻找什么？但是,如何指定要搜索的钥匙串？在这种情况下,什么是服务名称？

...我是唯一一个认为Cocoa中的Keychain API绝对可怕的人吗？在过去的几个小时左右,我一直在阅读文档,我仍然无处可去: - /

Answer 1

使用SecItemCopyMatching迭代钥匙串中的项目,并使用SecKeychainFindInternetPassword或SecKeychainFindGenericPassword访问密码.

迭代钥匙串:

// iterates over keychain and pass every item found by the query to PrintAccount.
static void IterateOverKeychain() {
    // create query
    CFMutableDictionaryRef query = CFDictionaryCreateMutable(kCFAllocatorDefault, 3, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
    CFDictionaryAddValue(query, kSecReturnAttributes, kCFBooleanTrue);
    CFDictionaryAddValue(query, kSecMatchLimit, kSecMatchLimitAll);
    CFDictionaryAddValue(query, kSecClass, kSecClassInternetPassword);

    // get search results
    CFArrayRef result = nil;
    OSStatus status = SecItemCopyMatching(query, (CFTypeRef*)&result);
    assert(status == 0);

    // do something with the result
    CFRange range = CFRangeMake(0, CFArrayGetCount(result));
    CFArrayApplyFunction(result, range, PrintAccount, nil);
}

// prints the password for a item from the keychain.
static void PrintAccount(const void *value, void *context) {
    CFDictionaryRef dict = value;
    CFStringRef acct = CFDictionaryGetValue(dict, kSecAttrAccount);
    NSLog(@"%@", acct);
}

打印密码:

static void PrintPassword() {
    const char *acct = "foo.bar@googlemail.com";
    UInt32 acctLen = (UInt32)strlen(acct);

    const char *srvr = "calendar.google.com";
    UInt32 srvrLen = (UInt32)strlen(srvr);

    UInt32 pwLen = 0;
    void *pw = 0;

    SecKeychainFindInternetPassword(nil, srvrLen, srvr, 0, nil, acctLen, acct, 0, nil, 0, kSecProtocolTypeAny, kSecAuthenticationTypeAny, &pwLen, &pw, nil);

    CFStringRef pwString = CFStringCreateWithBytes(kCFAllocatorDefault, pw, pwLen, kCFStringEncodingUTF8, NO);
    NSLog(@"%s %@", acct, pwString);
}