Trait CredentialStorage 

pub trait CredentialStorage: Send + Sync {
    // Required methods
    fn read_first(&mut self, filter: CredentialFilter) -> Result<Credential>;
    fn read_next(&mut self) -> Result<Credential>;
    fn read(&mut self, id: &[u8]) -> Result<Credential>;
    fn write(&mut self, cred: CredentialRef<'_>) -> Result<()>;
    fn delete(&mut self, id: &[u8]) -> Result<()>;
    fn count_credentials(&self) -> usize;

    // Provided methods
    fn disable_user_verification(&self) -> bool { ... }
    fn cleanup_expired_cache(&mut self) { ... }
}

Trait defining the storage interface for credentials

Any storage backend must implement this trait.

Required Methods

fn read_first(&mut self, filter: CredentialFilter) -> Result<Credential>

Start a new iteration and return the first matching credential

fn read_next(&mut self) -> Result<Credential>

Continue the current iteration and return the next credential

fn read(&mut self, id: &[u8]) -> Result<Credential>

Read a specific credential by ID and RP

fn write(&mut self, cred: CredentialRef<'_>) -> Result<()>

Store a new credential

fn delete(&mut self, id: &[u8]) -> Result<()>

Delete a credential by ID

fn count_credentials(&self) -> usize

Count total number of stored credentials

Provided Methods

fn disable_user_verification(&self) -> bool

Check if user verification should be disabled for this backend

Some backends (like pass) don’t support user verification. The default implementation returns false (UV enabled).

Returns

true if UV should be disabled, false otherwise

fn cleanup_expired_cache(&mut self)

Cleanup expired cache entries (if caching is supported)

This method should be called periodically to ensure cached credentials don’t remain in memory beyond their TTL, even when idle.

Default implementation does nothing (for backends without caching).

Security

Important for security: ensures sensitive data is removed promptly.

Trait Implementations

impl CredentialStorage for Box<dyn CredentialStorage>

fn read_first(&mut self, filter: CredentialFilter) -> Result<Credential>

Start a new iteration and return the first matching credential

fn read_next(&mut self) -> Result<Credential>

Continue the current iteration and return the next credential

fn read(&mut self, id: &[u8]) -> Result<Credential>

Read a specific credential by ID and RP

fn write(&mut self, cred: CredentialRef<'_>) -> Result<()>

Store a new credential

fn delete(&mut self, id: &[u8]) -> Result<()>

Delete a credential by ID

fn count_credentials(&self) -> usize

Count total number of stored credentials

fn disable_user_verification(&self) -> bool

Check if user verification should be disabled for this backend

fn cleanup_expired_cache(&mut self)

Cleanup expired cache entries (if caching is supported)

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl CredentialStorage for Box<dyn CredentialStorage>

fn read_first(&mut self, filter: CredentialFilter) -> Result<Credential>

fn read_next(&mut self) -> Result<Credential>

fn read(&mut self, id: &[u8]) -> Result<Credential>

fn write(&mut self, cred: CredentialRef<'_>) -> Result<()>

fn delete(&mut self, id: &[u8]) -> Result<()>

fn count_credentials(&self) -> usize

fn disable_user_verification(&self) -> bool

fn cleanup_expired_cache(&mut self)

Implementors

impl CredentialStorage for LocalStorageAdapter

impl CredentialStorage for passless_rs::storage::pass::PassStorageAdapter

impl CredentialStorage for passless_rs::storage::PassStorageAdapter