qr code generator asp net c# Lesson 1: Understanding Code Access Security in C#.NET

Encoder QR-Code in C#.NET Lesson 1: Understanding Code Access Security

Lesson 1: Understanding Code Access Security
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CAS complements, but does not replace, role-based security
Exam Tip
No assembly can have more permissions than the user running the assembly, regardless of how the assembly uses CAS.
How to Use the .NET Framework Configuration Tool to Configure CAS
The .NET Framework Configuration tool provides a graphical interface for managing .NET Framework security policy and applications that use remoting services. You can perform many different CAS-related tasks, including the following:
Evaluating an assembly to determine which code groups it is a member of Evaluating an assembly to determine which permissions it will be assigned Adding new permission sets Adding new code groups Increasing an assembly s trust Adjusting zone security Resetting policy levels
11
Application Security
MORE INFO
.NET Framework Configuration tool
This chapter covers using the .NET Framework Configuration tool only to manage CAS policy. For more information about the .NET Framework Configuration tool, refer to 9, Installing and Configuring Applications.
The following sections provide procedures for performing these tasks.
How to Determine Which Code Groups Grant Permissions to an Assembly
When troubleshooting CAS permissions, you might need to determine which code groups grant permissions to your assembly. To do this, launch the .NET Framework Configuration tool and perform the following steps: 1. Click Runtime Security Policy. 2. Click Evaluate Assembly. The Evaluate An Assembly Wizard appears. 3. On the What Would You Like To Evaluate page, click Browse. Select your assembly and then click Open. 4. Click the View Code Groups That Grant Permissions To The Assembly option. Click Next. 5. Expand each policy level to determine which code groups grant permissions to your assembly. Figure 11-6 shows an assembly that receives permissions from the My_Computer_Zone code group.
Figure 11-6 Use the Evaluate An Assembly Wizard to determine which code groups apply permissions to your assembly
6. Click Finish.
Lesson 1: Understanding Code Access Security
How to Determine Total CAS Permissions Granted to an Assembly
When troubleshooting CAS permissions, you might need to determine which permissions the runtime will grant to your assembly. To do this, launch the .NET Framework Configuration tool and perform the following steps: 1. Click Runtime Security Policy. 2. Click Evaluate Assembly. The Evaluate An Assembly Wizard appears. 3. On the What Would You Like To Evaluate page, click Browse. Select your assembly and then click Open. 4. Click the View Permissions Granted To The Assembly option. Click Next. 5. The wizard displays each permission assigned to your assembly. To view the detailed permission settings, select any permission and then click the View Permission button. 6. Click Finish.
How to Add a Permission Set
To create a new permission set, launch the .NET Framework Configuration tool and perform the following steps: 1. Expand Runtime Security Policy. 2. Expand Enterprise, Machine, or User, depending on the policy level in which you want to define the permission set. 3. Click Permission Sets. In the right pane, click Create New Permission Set. 4. On the Identify The New Permission Set page, specify a name and description. Click Next. 5. On the Assign Individual Permissions To Permission Set page, perform the following steps: A. Click the permission you want to add to the permission set, and click Add. B. For each permission, specify the permission settings that are unique to that permission and click OK. C. Repeat this process for each individual permission required by your permission set. 6. Click Finish.
11
Application Security
How to Add a Code Group
To add a code group, launch the .NET Framework Configuration tool and perform the following steps: 1. Expand Runtime Security Policy. 2. Expand Enterprise, Machine, or User, depending on the policy level in which you want to define the code group. 3. Expand Code Groups, expand All_Code, and examine the existing child code groups. If the code group you want to create defines a subset of permissions for an existing code group, click that code group. Otherwise, click All_Code. 4. Click Add A Child Code Group. 5. On the Identify The New Code Group page, type a name and a description, and then click Next. 6. On the Choose A Condition Type page, specify the condition type for the code group by choosing the evidence the runtime will use to identify the code. Click Next. 7. On the Assign A Permission Set To The Code Group page, click the Use Existing Permission Set option if one of the current permission sets exactly meets your needs. Otherwise, click Create A New Permission Set. Click Next. 8. If you selected Create A New Permission Set, perform the following steps: A. On the Identify The New Permission Set page, specify a name and description. Click Next. B. On the Assign Individual Permissions To Permission Set page, click the permissions you want in the permission set and click Add. For each permission, specify the permission settings that are unique to that permission and click OK. Click Next. 9. On the Completing The Wizard page, click Finish.
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