SecItemAdd errors extracting from a Pem file

I am getting a strange error on OS 10.10 ( and later) when trying to get the Public Key reference from a PEM file.

The SecItemAdd returns the value errSecNoSuchAttr . The specified attribute does not exist. (-25302)

This error seems strange, as if there is some issue with the paramaters passed, which work on iOS. Removing them one by one causes other issues.

I have also created a technical support ticket on this if any internal engineer wants the full code DTS has it.

- (SecKeyRef) getPublicKeyFromPem:(NSString*)name{
    NSMutableString *string = [[NSMutableString alloc] init];

    NSString *startPublicKey = @"-----BEGIN PUBLIC KEY-----";
    NSString *endPublicKey = @"-----END PUBLIC KEY-----";
    NSString* path = [[NSBundle mainBundle] pathForResource:@"test"
                                                     ofType:@"pem"];
    NSString* content = [NSString stringWithContentsOfFile:path
                                                  encoding:NSUTF8StringEncoding
                                                     error:NULL];
    NSLog(@"Public Key Key: %@", content);

    NSError* error = nil;

    NSString *publicKeyStr;
    NSScanner *scanner = [NSScanner scannerWithString:content];
    [scanner scanUpToString:startPublicKey intoString:nil];
    [scanner scanString:startPublicKey intoString:nil];
    [scanner scanUpToString:endPublicKey intoString:&publicKeyStr];

    publicKeyStr = [publicKeyStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    NSData *publicTag = [[NSData alloc] initWithBase64EncodedString:publicKeyStr options:NSDataBase64DecodingIgnoreUnknownCharacters];

    SecKeyRef publicKey = [self addPeerPublicKey:name keyBits:publicTag error:&error];

    [string appendString:[NSString stringWithFormat:@"Public Key Object : %@",publicKey]];

    if (error){
        [string appendString:[NSString stringWithFormat:@"error is %@", error]];
    }


    [self.pemResultTextView setString:string];

    return publicKey;
}

- (SecKeyRef)addPeerPublicKey:(NSString *)peerName keyBits:(NSData *)publicKeyData  error: (NSError**)outError {
    OSStatus sanityCheck = noErr;
    SecKeyRef peerKeyRef = NULL;
    CFTypeRef persistPeer = NULL;
    CFErrorRef cfError = NULL;
    SecAccessControlRef accessCtrl;
    accessCtrl = SecAccessControlCreateWithFlags(kCFAllocatorDefault,
                                                 kSecAttrAccessibleWhenUnlocked,
                                                 kSecAccessControlUserPresence, &cfError);
    if(!accessCtrl) {
        if (outError)
            *outError = CFBridgingRelease(cfError);
        return NO;
    }


    NSData * tagData = [[NSData alloc] initWithBytes:(const void *)[peerName UTF8String] length:[peerName length]];
    NSDictionary *peerPublicKeyAttr = @{(__bridge id)kSecClass: (__bridge id)kSecClassKey,
                                 (__bridge id)kSecAttrKeyType: (__bridge id)kSecAttrKeyTypeRSA,
                                 (__bridge id)kSecAttrApplicationTag: tagData,
                                 (__bridge id)kSecValueData: publicKeyData,
                                 (__bridge id)kSecAttrKeySizeInBits: @(publicKeyData.length),
                                 (__bridge id)kSecReturnPersistentRef: (id)kCFBooleanTrue,
                                 (__bridge id)kSecAttrAccessControl: CFBridgingRelease(accessCtrl)};



    sanityCheck = SecItemAdd((CFDictionaryRef) CFBridgingRetain(peerPublicKeyAttr), (CFTypeRef *)&persistPeer);
    if (checkStatus(sanityCheck, outError) == NO){
        return nil;
    }

    return peerKeyRef;
}