Single sign-on for managed mobile devices

1. A non-transitory computer-readable medium embodying a program executable in a server computing device, the program, when executed by the server computing device, being configured to cause the server computing device to at least:

receive a request for an identity assertion from an application executed in a mobile device;

detect that the requesting mobile device includes a specific platform selected from a plurality of platforms, wherein each of the plurality of platforms is operable to work with only one of a plurality of corresponding subsets of a plurality of types of management credentials, and the only one of the corresponding subsets of the plurality of types of management credentials differs for each of the plurality of platforms;

identify a specific platform adapter individually corresponding to the detected specific platform, wherein the specific platform adapter is selected from a plurality of platform adapters that each individually correspond to one of the plurality of platforms, and each of the plurality of platform adapters is individually operable with a corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials for the one of the plurality of platforms;

generate, by the identified specific platform adapter, a response that requests a management credential having the corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials;

send to the mobile device the response;

receive the requested management credential from the mobile device;

determine that the received management credential is valid for the identity assertion; and

send the identity assertion to the mobile device in response to determining that the management credential is valid for the identity assertion.

2. The non-transitory computer-readable medium of claim 1 , wherein the mobile device has access to the management credential in response to authentication by a device management service of a user of the mobile device.

3. The non-transitory computer-readable medium of claim 1 , wherein, when the specific platform is iOS, the request is generated by an iOS-specific certificate adapter.

4. The non-transitory computer-readable medium of claim 1 , wherein, when the specific platform is ANDROID, the request is generated by a certificate adapter.

5. The non-transitory computer-readable medium of claim 1 , wherein the management credential corresponds to a device management certificate maintained by a management application executed in the mobile device, the management application being configured to manage the application.

6. The non-transitory computer-readable medium of claim 1 , wherein the program, when executed by the server computing device, is further configured to cause the server computing device to at least:

receive a second request for a second identity assertion from a second application executed in the mobile device;

send to the mobile device a second response to the second request based at least in part on the platform, the second response requesting the management credential;

receive the management credential from the mobile device;

determine that the management credential is valid for the second identity assertion; and

send the second identity assertion to the mobile device in response to determining that the management credential is valid for the second identity assertion.

7. The non-transitory computer-readable medium of claim 1 , wherein the plurality of types of management credentials includes a secure certificate type and a Kerberos profile type.

8. A system, comprising:

at least one computing device; and

an identity provider service executable by the at least one computing device, the identity provider service configured to cause the at least one computing device to at least:

receive a request for an identity assertion from an application executed in a mobile device, the request including a user-agent string;

determine that the application corresponds to a webview of a native application rather than a browser by examining the user-agent string;

detect that the requesting mobile device includes a specific platform selected from a plurality of platforms, wherein each of the plurality of platforms is operable to work with only one of a plurality of corresponding subsets of a plurality of types of management credentials, and the only one of the corresponding subsets of the plurality of types of management credentials differs for each of the plurality of platforms;

identify a specific platform adapter individually corresponding to the detected specific platform, wherein the specific platform adapter is selected from a plurality of platform adapters that each individually correspond to one of the plurality of platforms, and each of the plurality of platform adapters is individually operable with a corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials for the one of the plurality of platforms;

generate, by the identified specific platform adapter, a response that requests a management credential having the corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials;

send to the mobile device the response;

receive the management credential from the mobile device;

determine that the management credential is valid for the identity assertion; and

send the identity assertion to the mobile device in response to determining that the management credential is valid for the identity assertion.

9. The system of claim 8 , wherein the identified specific platform adapter is an iOS-specific certificate adapter.

10. The system of claim 8 , wherein the request for the identity assertion is redirected to the identity provider service from a service provider.

11. The system of claim 8 , wherein the response to the request is a hypertext transfer protocol (HTTP) response having a 401 authentication required status code.

12. A method, comprising:

receiving a request for an identity assertion from an application executed in a client device;

detecting that the requesting client device includes a specific platform selected from a plurality of platforms, wherein each of the plurality of platforms is operable to work with only one of a plurality of corresponding subsets of a plurality of types of management credentials, and the only one of the corresponding subsets of the plurality of types of management credentials differs for each of the plurality of platforms;

identifying a specific platform adapter individually corresponding to the detected specific platform, wherein the specific platform adapter is selected from a plurality of platform adapters that each individually correspond to one of the plurality of platforms, and each of the plurality of platform adapters is individually operable with a corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials for the one of the plurality of platforms;

generating, by the identified specific platform adapter, a response that requests a management credential having the corresponding type of management credential of the only one of the plurality of corresponding subsets of the plurality of types of management credentials;

sending to the client device the response;

receiving the management credential from the client device;

determining that the management credential is valid for the identity assertion; and

sending the identity assertion to the client device in response to determining that the management credential is valid for the identity assertion.

13. The method of claim 12 , wherein the client device has access to the management credential in response to authentication by a device management service of a user of the client device.

14. The method of claim 12 , wherein the request for the identity assertion is redirected from a service provider.

15. The method of claim 12 , further comprising detecting that the client device complies with a set of access rules.

16. The method of claim 12 , wherein the detected specific platform is iOS and the identified specific platform adapter is an iOS-specific certificate adapter.

17. The method of claim 12 , wherein the identity assertion is a security assertion markup language (SAML) assertion.

18. The method of claim 12 , wherein the response is a hypertext transfer protocol (HTTP) response having a 401 authentication required status code.

19. The method of claim 12 , wherein the response in turn requests Kerberos protocol authentication.

20. The method of claim 12 , wherein the management credential corresponds to a device management certificate maintained by a management application executed in the client device.