Amazon SNS ios device token length

Question

I have an iPhone app I'm working on and trying to get Amazon SNS set up to test PNS. When we register the app with APNS, it gives a 32-digit device token (873DBDDA-17CF-4A24-88C6-990B90AFC4C3). When registering a device with Amazon SNS, it says the device token must be 64-digits long. What am I missing here?

This is the device ID, not the device token. For Amazon SNS you need to send the device token so that it identifies both the device and the app. — brocksamson, Mar 10 '15 at 19:03

score 11 · Answer 1 · edited Mar 26 '15 at 08:47

11

How did you get that token? It doesn't look like a correct APNS device token. A real one will be 64 hex digits. Here's the code I use:

-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    NSString *tokenstring = [[[deviceToken description]
                              stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]]
                             stringByReplacingOccurrencesOfString:@" " withString:@""];

    // pass tokenstring to your APNS server
}

The token that I get out of that method looks like this:

 8ec3bba7de23cda5e8a2726c081be79204faede67529e617b625c984d61cf5c1

edited Mar 26 '15 at 08:47

Rakesh patanga

832
9
25

answered Jan 03 '14 at 23:39

jsd

7,673
5
27
47

I agree, I get pns tokens with 64 digits, not 32 – Rob Bowman May 12 '14 at 17:08
1

It is 64 characters in hex string form but the [documentation](https://developer.apple.com/library/mac/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/CommunicatingWIthAPS.html#//apple_ref/doc/uid/TP40008194-CH101-SW4) could confuse you as it refers to the binary form `Device token - 32 bytes- The device token in binary form, as was registered by the device.` – KCD Oct 19 '15 at 23:11

score 0 · Answer 2 · edited May 23 '17 at 12:01

This is an old question, but I was looking for a problem with token's and this unanswered question came up. Here is what I use - AWS v2.

With help from erik-aigner in the question 7520615

- (void)awsStartWithDeviceToken:(NSData *)deviceToken {

    // Get a hex string for the NSData deviceToken
    // https://stackoverflow.com/questions/7520615/how-to-convert-an-nsdata-into-an-nsstring-hex-string
    NSUInteger dataLength = [deviceToken length];
    NSMutableString *deviceTokenString = [NSMutableString stringWithCapacity:dataLength*2];
    const unsigned char *dataBytes = [deviceToken bytes];
    for (NSInteger idx = 0; idx < dataLength; ++idx) {
        [deviceTokenString appendFormat:@"%02x", dataBytes[idx]];
    }
    _savedDeviceTokenFormatted = deviceTokenString;
}

score 0 · Answer 3 · answered Sep 16 '16 at 11:16

A Swift extension to convert to hexadecimal string

extension Data {

    /// Return hexadecimal string representation of Data bytes
    public var hexadecimalString: String {
        var bytes = [UInt8](repeating: 0, count: count)
        copyBytes(to: &bytes, count: count)

        let hexString = NSMutableString()
        for byte in bytes {
            hexString.appendFormat("%02x", UInt(byte))
        }

        return String(hexString)
    }
}

Amazon SNS ios device token length

3 Answers3