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System Store Locations

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A system store is a collection that consists of one or more physical sibling stores. For each system store, there are predefined physical sibling stores. After opening a system store such as MY at CERT_SYSTEM_STORE_CURRENT_USER, the store provider calls CertOpenStore to open each of the physical stores in the system store collection. In the open process, each of these physical stores is added to the system store collection using CertAddStoreToCollection. All certificates in those physical stores are available through the logical system store collection.

For each system store location, the predefined systems stores are:

  • MY
  • Root
  • Trust
  • CA

In CERT_SYSTEM_STORE_CURRENT_USER, there is also a predefined UserDS store. A smart card store is planned for this location.

Here are the system stores followed by further remarks:

CERT_SYSTEM_STORE_CURRENT_USER

CERT_SYSTEM_STORE_CURRENT_USER system stores are at the following registry location:

HKEY_CURRENT_USER
   Software
      Microsoft
         SystemCertificates

The predefined physical stores associated with those system stores are as follows.

System store Physical store
MY .Default
Root .Default.LocalMachine
.SmartCard
Trust .Default.GroupPolicy
.LocalMachine
CA .Default.GroupPolicy
.LocalMachine
UserDS .UserCertificate

 

CERT_SYSTEM_STORE_LOCAL_MACHINE

CERT_SYSTEM_STORE_LOCAL_MACHINE system stores are at the following registry location:

HKEY_LOCAL_MACHINE
   Software
      Microsoft
         SystemCertificates

The predefined physical stores are associated with those system stores are as follows.

System store Physical store
MY .Default
Root .Default.AuthRoot
.GroupPolicy
.Enterprise
.SmartCard
Trust .Default.GroupPolicy
.Enterprise
CA .Default.GroupPolicy
.Enterprise

 

CERT_SYSTEM_STORE_CURRENT_SERVICE

CERT_SYSTEM_STORE_CURRENT_SERVICE system stores are at the following registry location:

HKEY_LOCAL_MACHINE
   Software
      Microsoft
         Cryptography
            Services
               ServiceName
                  SystemCertificates

The predefined physical stores associated with those system stores are as follows.

System store Physical store
MY .Default
Root .Default.LocalMachine
Trust .Default.LocalMachine
CA .Default.LocalMachine

 

CERT_SYSTEM_STORE_SERVICES

CERT_SYSTEM_STORE_SERVICES system stores are at the following registry location:

HKEY_LOCAL_MACHINE
   Software
      Microsoft
         Cryptography
            Services
               ServiceName
                  SystemCertificates

The predefined physical stores associated with those system stores are as follows.

System store Physical store
ServiceName\MY .Default
ServiceName\Root .Default.LocalMachine
ServiceName\Trust .Default.LocalMachine
ServiceName\CA .Default.LocalMachine

 

CERT_SYSTEM_STORE_USERS

CERT_SYSTEM_STORE_USERS system stores are at the following registry location:

HKEY_USERS
   UserName
      Software
         Microsoft
            SystemCertificates

The predefined physical stores associated with those system stores are as follows.

System store Physical store
userid\MY .Default.LocalMachine
userid\Root .Default.LocalMachine
userid\Trust .Default.LocalMachine
userid\CA .Default.LocalMachine

 

CERT_SYSTEM_CURRENT_USER_GROUP_POLICY

CERT_SYSTEM_CURRENT_USER_GROUP_POLICY system stores are at the following registry location:

HKEY_CURRENT_USER
   Software
      Policy
         Microsoft
            SystemCertificates

CERT_SYSTEM_LOCAL_MACHINE_GROUP_POLICY

CERT_SYSTEM_LOCAL_MACHINE_GROUP_POLICY system stores are at the following registry location:

HKEY_LOCAL_MACHINE
   Software
      Policy
         Microsoft
            SystemCertificates

CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE

CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE contains certificates shared across domains in the enterprise and downloaded from the global enterprise directory. To synchronize the client's enterprise store, the enterprise directory is polled every eight hours and certificates are downloaded automatically in the background.

The predefined physical stores associated with these system stores are as follows.

System store Physical store
MY .Default
Root .Default
Trust .Default
CA .Default

 

Remarks

Additional physical stores can be associated with a system store by using CertRegisterPhysicalStore.

CERT_SYSTEM_STORE_SERVICE and CERT_SYSTEM_STORE_USERS stores are opened by prefixing the name of the store in the string passed to pvPara with the service or user name such as ServiceName\Trust or .Default\MY. The CERT_SYSTEM_STORE_SERVICES or CERT_SYSTEM_STORE_USERS location can open the same store in CERT_SYSTEM_CURRENT_SERVICE or CERT_SYSTEM_STORE_CURRENT_USER by using the textual security identifier (SID) of the current service or user.

Stores in CERT_SYSTEM_STORE_USER_GROUP_POLICY and CERT_SYSTEM_LOCAL_MACHINE_GROUP_POLICY in a network setting are downloaded to the client computer from the Group Policy Template (GPT) during computer startup or user logon. These stores can be updated on the client computer after startup or logon when the GPT is changed on the domain server by an administrator. The CertControlStore function allows an application to be notified when stores in either of these locations have changed.

The following system store locations can be opened remotely:

  • CERT_SYSTEM_STORE_LOCAL_MACHINE
  • CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY
  • CERT_SYSTEM_STORE_SERVICES
  • CERT_SYSTEM_STORE_USERS

System store locations are opened remotely by prefixing the store name in the string passed to pvPara with the computer name. Examples of remote system store names are:

  • ComputerName\CA
  • \\ComputerName\CA
  • ComputerName\ServiceName\Trust
  • \\ComputerName\ServiceName\Trust