Google Cloud Messaging is a service that allows you to send notifications to your applications and receive information from them. Your GCM Sender ID helps authenticate against CleverTap, allowing us to send push notifications on your behalf.
Apr 03, 2016 Sometimes an app developer needs to store secrets inside an app. For example, I am writing a healthcare app. To make it more convenient for the end user, I store the username and password in the.
Firebase Cloud Messaging (FCM) is the new version of GCM. It inherits the reliable and scalable GCM infrastructure, plus new features! If you are integrating messaging in a new app, start with FCM. GCM users are strongly recommended to upgrade to FCM, in order to benefit from new FCM features today and in the future.
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Login to Google Developer Console and go to your Dashboard.
If you have multiple projects on GDC, identify the applications whose GCM Sender ID you want to use.
Click on the project, the project number there is your GCM Sender ID.
Login to Google Developer Console and navigate to Enable and Manage APIs section.
Select Cloud Messaging for Android under Mobile APIs.
First, enable the API. Then go to the Credentials section and Add a new API Key.
Create a new Server Key.
Name the key and whitelist provided IP Addresses, after you create the key here, it can take up to 10 mins for the settings to take effect.
Here is your API key! You’re now good to go.
Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Use the generateKey()
method of the SubtleCrypto
interface to generate a new key (for symmetric algorithms) or key pair (for public-key algorithms).
algorithm
is a dictionary object defining the type of key to generate and providing extra algorithm-specific parameters. RsaHashedKeyGenParams
object.EcKeyGenParams
object.HmacKeyGenParams
object.AesKeyGenParams
object.extractable
is a Boolean
indicating whether it will be possible to export the key using SubtleCrypto.exportKey()
or SubtleCrypto.wrapKey()
.keyUsages
 is an Array
indicating what can be done with the newly generated key. Possible values for array elements are: encrypt
: The key may be used to encrypt
messages.decrypt
: The key may be used to decrypt
messages.sign
: The key may be used to sign
messages.verify
: The key may be used to verify
signatures.deriveKey
: The key may be used in deriving a new key
.deriveBits
: The key may be used in deriving bits
.wrapKey
: The key may be used to wrap a key
.unwrapKey
: The key may be used to unwrap a key
.result
is a Promise
that fulfills with a CryptoKey
(for symmetric algorithms) or a CryptoKeyPair
(for public-key algorithms).The promise is rejected when the following exception is encountered:
SyntaxError
CryptoKey
of type secret
or private
but keyUsages
is empty.SyntaxError
CryptoKeyPair
and its privateKey.usages
attribute is empty.This code generates an RSA-OAEP encryption key pair. See the complete code on GitHub.
This code generates an ECDSA signing key pair. See the complete code on GitHub.
This code generates an HMAC signing key. See the complete code on GitHub.
This code generates an AES-GCM encryption key. See the complete code on GitHub.
Specification | Status | Comment |
---|---|---|
Web Cryptography API The definition of 'SubtleCrypto.generateKey()' in that specification. | Recommendation | Initial definition. |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | |
generateKey | ChromeFull support 37 | EdgePartial support12
| FirefoxFull support 34
| IEPartial support11 Notes
| OperaFull support 24 | SafariFull support 7 | WebView AndroidFull support 37 | Chrome AndroidFull support 37 | Firefox AndroidFull support 34
| Opera AndroidFull support 24 | Safari iOSFull support 7 | Samsung Internet AndroidFull support 6.0 |