Modified the Krb5 mechanisms to allow it to receive multiple settings via the authentication policy mechanism information string. This will allow to add

new settings in the future without breaking existing clients.

CASA-auth-token/client/library/mechanisms/krb5/windows/get.c

@@ -96,7 +96,7 @@ AuthTokenIf_GetAuthToken(
 //=======================================================================--
 {
    CasaStatus        retStatus;
-   char              *pKrbServiceName = pMechInfo;
+   char              *pKrbServiceName = NULL;
    SECURITY_STATUS   secStatus;
    TimeStamp         expiry;
    CredHandle        hCredentials = {0};
@@ -118,6 +118,37 @@ AuthTokenIf_GetAuthToken(
       goto exit;
    }
 
+   // Process any mechanism information that may have been provided
+   if (pMechInfo)
+   {
+      // Mechanism information has been provided. Mechanism information
+      // consists of semicolon delimited settings. The settings are formated
+      // using the format settingName=settingvalue. No white space is allowed
+      // as part of the mechanism information.
+      char *pNextSettingToken;
+      char *pSettingValueToken = strtok_s(pMechInfo, ";", &pNextSettingToken);
+      while (pSettingValueToken != NULL)
+      {
+         char *pNextToken;
+         char *pSettingName = strtok_s(pSettingValueToken, "=", &pNextToken);
+         char *pSettingValue = strtok_s(NULL, "=", &pNextToken);
+         if (pSettingValue)
+         {
+            // Process the setting
+            if (strcmpi(pSettingName, "SVC_PRINCIPAL") == 0)
+            {
+               pKrbServiceName = pSettingValue;
+            }
+         }
+         else
+         {
+            printf("Bad setting\n");
+         }
+
+         pSettingValueToken = strtok_s(NULL, ";", &pNextSettingToken);
+      }
+   }
+
    // Check if we need to construct the service name
    if (pKrbServiceName == NULL
        || strlen(pKrbServiceName) == 0)