Query and manipulate the Windows Credential Store — windows

windows_item_* functions read, write, delete and list credentials.

Usage

windows_item_types()

windows_item(
  credential_blob,
  target_name,
  type = "generic",
  comment = NULL,
  persist = c("local_machine", "session", "enterprise"),
  attributes = list(),
  target_alias = NULL,
  username = NULL
)

windows_item_read(target_name, type = "generic")

windows_item_write(item, preserve = FALSE)

windows_item_delete(target_name, type = "generic")

windows_item_enumerate(filter = NULL, all = FALSE)

Arguments

credential_blob

The secret credential, a password, certificate or key. See also https://learn.microsoft.com/en-us/windows/win32/api/wincred/ This can be a raw vector, or a string. If it is a string, then it will be converted to Unicode, without the terminating zero. It can also be NULL, to be used with the preserve = TRUE argument of windows_item_write().

target_name

The name of the credential. The target_name and type members uniquely identify the credential. This member cannot be changed after the credential is created. Instead, the credential with the old name should be deleted and the credential with the new name created. This member cannot be longer than CRED_MAX_GENERIC_TARGET_NAME_LENGTH (32767) characters. This member is case-insensitive.

type

The type of the credential. This member cannot be changed after the credential is created. See windows_item_types() for possible values.

comment

If not NULL, then a string comment from the user that describes this credential. This member cannot be longer than CRED_MAX_STRING_LENGTH (256) characters. It is stored as a Unicode string.

persist

Defines the persistence of this credential.

"local_machine": The credential persists for all subsequent logon sessions on this same computer. It is visible to other logon sessions of this same user on this same computer and not visible to logon sessions for this user on other computers.
"session": The credential persists for the life of the logon session. It will not be visible to other logon sessions of this same user. It will not exist after this user logs off and back on.
"enterprise": The credential persists for all subsequent logon sessions on this same computer. It is visible to other logon sessions of this same user on this same computer and to logon sessions for this user on other computers.

attributes

Application-defined attributes that are associated with the credential. This is NULL or a named list of raw or string vectors. String vectors are converted to Unicode, without the terminating zero. A credential can have at most 64 attributes, the names of the attributes cannot be longer than CRED_MAX_STRING_LENGTH (256) characters each, and the attributes themselves cannot be longer than CRED_MAX_VALUE_SIZE (256) bytes.

target_alias

Alias for the target_name member. This member can be read and written. It cannot be longer than CRED_MAX_STRING_LENGTH (256) characters. It is stored in Unicode.

username

NULL or the user name of the account used to connect to target_name.

item

oskeyring_windows_item object to write.

preserve

The credential BLOB from an existing credential is preserved with the same credential name and credential type. The credential_blob of the passed oskeyring_windows_item object must be NULL.

filter

If not NULL, then a string to filter the credentials. Only credentials with a target_name matching the filter will be returned. The filter specifies a name prefix followed by an asterisk. For instance, the filter "FRED*" will return all credentials with a target_name beginning with the string "FRED".

all

Whether to use the CRED_ENUMERATE_ALL_CREDENTIALS flag to enumerate all credentials. If this is TRUE, then filter must be NULL. If this is TRUE, then the target name of each credential is returned in the "namespace:attribute=target" format.

Value

windows_item_types() returns a character vector, the currently supported credential types.

windows_item() returns an oskeyring_windows_item

object.

windows_item_read() returns an oskeyring_windows_item

object.

windows_item_write() returns NULL, invisibly.

windows_item_delete() returns NULL, invisibly.

windows_item_enumerate() returns a list of oskeyring_windows_item items.

Details

`windows_item_types()`

windows_item_types() lists the currently supported credential types.

windows_item_types()
#> [1] "generic"                 "domain_password"        
#> [3] "domain_certificate"      "domain_visible_password"

`windows_item()`

windows_item() creates a Windows credential, that can be then added to the credential store.

it <- windows_item("secret", "my-host-password")
it
#> <oskeyring_windows_item: generic>
#>  target_name: my-host-password
#>  persist: local_machine
#>  credential_blob: <-- hidden -->

`windows_item_write()`

Writes an item to the credential store.

windows_item_write(it)

`windows_item_read()`

Reads a credential with the specified type and target_name.

windows_item_read("my-host-password")

`windows_item_enumerate()`

List all credentials that match a prefix.

windows_item_enumerate(filter = "my-*")

`windows_item_delete()`

Delete a credential:

windows_item_delete("my-host-password")
windows_item_enumerate(filter = "my-*")

Examples

# See above