CertStore Rust Reference Documentation
CertStore
Current Version: 11.6.1
Chilkat.CertStore
Access certificates from Windows certificate stores, Apple Keychain,
files, memory stores, PEM bundles, PFX/P12 files, and hardware tokens.
Find certificates by subject, issuer, serial number, thumbprint, email,
private-key availability, or other identifying information.
Enumerate certificates in a store and retrieve each certificate as a
Add certificates to writable stores, remove certificates where supported,
and manage store contents from application code.
Work with certificates that have associated private keys from PFX/P12,
operating-system stores, smart cards, USB tokens, or other providers.
Pass retrieved certificates to other Chilkat classes for TLS client
authentication, S/MIME, signing, encryption, decryption, and verification.
For an extended overview, see
CertStore Class Overview.
Open, search, manage, and use certificate collections from many sources.
Chilkat.CertStore is the Chilkat class for working with
collections of X.509 certificates. It can open and manage certificates from
system stores, Apple Keychain, Windows registry or file stores, memory
stores, PEM files, PFX/P12 files, and smart card or USB token devices. It
supports loading, searching, iterating, adding, removing, and closing
certificate stores, with platform-specific behavior for Windows and Apple
Keychain.
Open certificate stores
Search and retrieve certs
Iterate collections
Chilkat.Cert object for inspection or use.
Add and remove certificates
Private-key backed certs
Use across Chilkat
Chilkat.Cert, and then pass that
certificate to the Chilkat class that needs it. Use certificate stores when
the application should select from existing system, file-based, keychain, or
hardware-backed certificates.
Object Creation
// Cargo.toml:
// [dependencies]
// chilkat = "11.6"
use chilkat::CertStore;
// Once per process, before any other Chilkat call:
chilkat::unlock_bundle("Anything for 30-day trial")?; // shorthand for Global::new().unlock_bundle(..)
let cert_store = CertStore::new();
// ... the native object is freed when `cert_store` goes out of scope.Creates the underlying native Chilkat object (CertStore also implements Default). Every method takes &self, so the object never needs to be declared mut. A CertStore is Send but not Sync: it may be moved to another thread, but a reference to it cannot be shared between threads at the same time.
The native object is freed when the CertStore is dropped — when it goes out of scope, or explicitly with drop(cert_store). There is no Dispose method to call.
Errors
Methods that can fail return chilkat::Result<T>, which is Result<T, chilkat::Error>: a method whose only outcome is success or failure returns Result<()>, a method producing a string or an object returns Result<String> or Result<CertStore>. The error carries the object's LastErrorText at the time of the failure (Error::last_error_text), the class and method names, and implements std::error::Error, so ? works in any function returning chilkat::Result or a Box<dyn Error>. Properties never fail, and methods that answer a question (has_..., is_..., ...) return a plain bool.
match cert_store.some_method(...) {
Ok(value) => println!("{value:?}"),
Err(e) => eprintln!("{}", e.last_error_text()),
}Properties
AvoidWindowsPkAccess
pub fn avoid_windows_pk_access(&self) -> bool
pub fn set_avoid_windows_pk_access(&self, value: bool)
Applies only when running on a Microsoft Windows operating system. If true, then any method that returns a certificate will not try to also access the associated private key, assuming one exists. This is useful if the certificate was installed with high-security such that a private key access would trigger the Windows OS to display a security warning dialog. The default value of this property is false.
DebugLogFilePath
pub fn debug_log_file_path(&self) -> String
pub fn set_debug_log_file_path(&self, value: &str)
If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.
Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.
Possible causes of hangs include:
- A timeout property set to 0, indicating an infinite timeout.
- A hang occurring within an event callback in the application code.
- An internal bug in the Chilkat code causing the hang.
LastErrorHtml
Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastErrorText
Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
LastErrorXml
Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastMethodSuccess
pub fn last_method_success(&self) -> bool
pub fn set_last_method_success(&self, value: bool)
Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages. Note: This property does not apply to methods that return integer values or to boolean-returning methods where the boolean does not indicate success or failure.
NumCertificates
pub fn num_certificates(&self) -> i32
The number of certificates held in the certificate store.
topSmartCardPin
Can be set to the PIN value for a certificate / private key stored on a smart card.
topUncommonOptions
pub fn uncommon_options(&self) -> String
pub fn set_uncommon_options(&self, value: &str)
This is a catch-all property to be used for uncommon needs. This property defaults to the empty string, and should typically remain empty.
topVerboseLogging
pub fn verbose_logging(&self) -> bool
pub fn set_verbose_logging(&self, value: bool)
If set to true, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.
Version
Methods
AddCertificate
On Windows, this updates or adds cert to the open Windows certificate store. Note: This imports the certificate without the private key. The Chilkat.Pfx.ImportToWindows method must be called to import a certificate with a private key.
Beginning with Chilkat v10.0.0, on macOS and iOS, this adds the certificate, including any private keys and intermediate CA certificates, to the Apple Keychain.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
CloseCertStore
This method closes any open certificate stores, removes all certificates from the object, and sets the NumCertificates property back to 0.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
CreateFileStore
This method, available only on Microsoft Windows, creates a new file-based certificate store. You can save certificates to this store by using the AddCertificate function.
Internally, the Microsoft function CertOpenStore is called with the provider type CERT_STORE_PROV_FILE and the flag CERT_STORE_CREATE_NEW_FLAG, to create a new, empty certificate store that is backed by a file.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
CreateMemoryStore
This method, available only on Microsoft Windows, creates an in-memory certificate store. Certificates may be added by calling AddCertificate.
Internally, the Microsoft function CertOpenStore is called with the provider type CERT_STORE_PROV_MEMORY to create a new in-memory certificate store. This store acts as a temporary container for managing certificates during runtime. The store exists only in memory and is not backed by a file or persistent storage. Certificates can be added, retrieved, or removed, but the store is lost when the application ends unless explicitly saved elsewhere.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
CreateRegistryStore
This method, available only on Microsoft Windows, creates a new registry-based certificate store. You can save certificates to this store by using the AddCertificate function.
Internally, the Microsoft function CertOpenStore is called with the provider type CERT_STORE_PROV_REG and a registry key to create a new, empty certificate store in the Windows registry.
reg_root can be the string CurrentUser or LocalMachine. reg_path is a registry key path such as Software/MyApplication/Certificates.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
FindCert
Searches for a certificate using criteria from json and stores the result in cert. If multiple criteria are provided, it searches each one sequentially and returns the first match.
Preference is given to non-expired certificates, so if both expired and non-expired certificates match, the non-expired one is selected.
See the examples below for details.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
GetCert
Loads the Nth certificate into cert. The first certificate is at index 0.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
LoadPemFile
Loads the certificates contained within a PEM formatted file.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
LoadPemStr
Loads the certificates contained within an in-memory PEM formatted string.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
LoadPfxBd
Loads the PFX/P12 bytes contained in bd. password is the password to the PFX.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
LoadPfxFile
Loads a PFX file. Once loaded, the certificates within the PFX may be searched via the Find* methods. It is also possible to iterate from 0 to NumCertficates-1, calling GetCertificate for each index, to retrieve each certificate within the PFX.
Note: This method does not import certificates into the Windows certificate stores. The purpose of this method is to load a .pfx/.p12 into this object so that other API methods can be called to explore or search the contents of the PFX. The Chilkat Pfx class also provides similar functionality.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenCurrentUserStore
On Windows, this method opens the Current-User\Personal certificate store in the registry. Set b_read_only to true to open the store in read-only mode, which allows you to fetch certificates without adding or removing them. This prevents permission denied errors that require read-write access.
Starting in version 10.0.0, this method opens the Apple Keychain on MacOS and iOS systems. The b_read_only is ignored.
After opening the store, you can search for certificates using the Find* methods. Alternatively, you can iterate through the certificates by indexing from 0 to NumCertificates-1, using GetCertificate to access each one.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenFileStore
(This method only available on Microsoft Windows operating systems.)
Opens a file-based certificate store.
Once loaded, the certificates within the store may be searched via the Find* methods. An application may also iterate from 0 to NumCertficates-1 and call GetCertificate to access each certificate by index.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenLocalSystemStore
(This method is only available on Microsoft Windows operating systems.)
Opens the registry-based Local-Computer\Personal certificate store. Set b_read_only = true if only fetching certificates and not updating the certificate store (i.e. certificates will not be added or removed). Setting b_read_only = true causes the certificate store to be opened read-only, and will prevent permission denied errors caused by the need for read-write permission.
Once loaded, the certificates within the store may be searched via the Find* methods. An application may also iterate from 0 to NumCertficates-1 and call GetCertificate to access each certificate by index.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenRegistryStore
(This method only available on Microsoft Windows operating systems.)
Opens an arbitrary registry-based certificate store. reg_root must be CurrentUser or LocalMachine. reg_path is a registry path such as Software/MyApplication/Certificates.
Setting b_read_only = true causes the certificate store to be opened read-only, and will prevent permission denied errors caused by the need for read-write permission.
Once loaded, the certificates within the store may be searched via the Find* methods. An application may also iterate from 0 to NumCertficates-1 and call GetCertificate to access each certificate by index.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenSmartcard
This function identifies connected HSM devices such as smart cards and USB tokens, and loads the certificates from each device. It has been significantly enhanced in Chilkat v10.1.2 and is compatible with Windows, MacOS, iOS, and Linux. (Android is not yet supported.)
Note: The csp is no longer used and is ignored. Applications should pass an empty string.
Note: If multiple HSM devices are connected, avoid setting the SmartCardPin property unless all devices share the same PIN. Otherwise, Chilkat will attempt to use that PIN for each device, which could cause issues.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
OpenWindowsStore
(This method only available on Microsoft Windows operating systems.)
Opens a Microsoft Windows certificate store. store_location must be CurrentUser or LocalMachine. store_name is the name of the certificate store to open. It may be any of the following:
- AddressBook: Certificate store for other users.
- AuthRoot: Certificate store for third-party certification authorities (CAs).
- CertificationAuthority: Certificate store for intermediate certification authorities (CAs).
- Disallowed: Certificate store for revoked certificates.
- My: Certificate store for personal certificates.
- Root: Certificate store for trusted root certification authorities (CAs).
- TrustedPeople: Certificate store for directly trusted people and resources.
- TrustedPublisher: Certificate store for directly trusted publishers.
Setting b_read_only = true causes the certificate store to be opened read-only, and will prevent permission denied errors caused by the need for read-write permission.
Once loaded, the certificates within the store may be searched via the Find* methods. An application may also iterate from 0 to NumCertficates-1 and call GetCertificate to access each certificate by index.
Returns Ok(()) for success, Err(chilkat::Error) for failure.
RemoveCertificate
(This method only available on Microsoft Windows operating systems.)
Removes the passed certificate from the store. The certificate object passed as the argument can no longer be used once removed.
Returns Ok(()) for success, Err(chilkat::Error) for failure.