DeviceAuth_CurlSslFunc Function

Header: #include <tlsutils/deviceauth_curl.h>

Performs mutual authentication using the application's device authentication credentials. Note that although the curl function names include SSL, Azure Sphere uses TLS for authentication.

When invoked by libcurl, DeviceAuth_CurlSslFunc sets the CURL object to perform mutual authentication with the endpoint using the application's device authentication credentials. This function's signature matches that of a libcurl callback for the CURLOPT_SSL_CTX_FUNCTION option.

CURLcode DeviceAuth_CurlSslFunc (CURL *curl, void *sslctx, void *userCtx);

Parameters

• curl The curl handle
• sslctx A pointer to the context that is passed by the application's callback
• userCtx The user context set with the CURLOPT_SSL_CTX_DATA option

Return value

Returns CURLE_SSL_CERTPROBLEM on error or CURLE_OK on success

Examples

Connect to web services contains additional information.

Application manifest requirements

To access individual hosts or domains, your application must identify them in the AllowedConnections field of the application manifest. If the application uses mutual authentication, the DeviceAuthentication field of the manifest must include the Azure Sphere tenant ID.