Struct DigestAlg 

pub struct DigestAlg { /* private fields */ }

An OpenSSL digest algorithm descriptor (EVP_MD*).

Fetched once and reused. Implements Clone via EVP_MD_up_ref.

Implementations

impl DigestAlg

pub fn fetch(name: &CStr, props: Option<&CStr>) -> Result<Self, ErrorStack>

Fetch a digest algorithm from the global default library context.

Errors

Returns Err if the algorithm is not available.

pub fn fetch_in( ctx: &Arc<LibCtx>, name: &CStr, props: Option<&CStr>, ) -> Result<Self, ErrorStack>

Fetch a digest algorithm from an explicit library context.

The Arc is cloned and held so the context outlives this descriptor.

Errors

pub fn output_len(&self) -> usize

Digest output size in bytes (e.g. 32 for SHA-256).

pub fn block_size(&self) -> usize

Block size in bytes (e.g. 64 for SHA-256).

pub fn nid(&self) -> i32

NID (numeric identifier) of the digest algorithm.

pub fn as_ptr(&self) -> *const EVP_MD

Return the raw EVP_MD* pointer. Valid for the lifetime of self.

impl DigestAlg

pub fn new_context(&self) -> Result<DigestCtx, ErrorStack>

Create a new digest context initialised with this algorithm.

Errors

Returns Err if context allocation or init fails.

pub fn digest(&self, data: &[u8], out: &mut [u8]) -> Result<usize, ErrorStack>

Compute a digest in a single call (one-shot path).

Zero-copy: reads from data, writes into out. out must be at least self.output_len() bytes.

Errors

pub fn digest_to_vec(&self, data: &[u8]) -> Result<Vec<u8>, ErrorStack>

Compute a digest and return it in a freshly allocated Vec<u8>.

Errors

Trait Implementations

impl Clone for DigestAlg

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DigestAlg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for DigestAlg

fn drop(&mut self)

Executes the destructor for this type.

impl Send for DigestAlg

impl Sync for DigestAlg