Struct openssl::sign::Signer

pub struct Signer<'a> { /* fields omitted */ }

A type which computes cryptographic signatures of data.

Methods

impl<'a> Signer<'a>

fn new<T>(
    type_: MessageDigest,
    pkey: &'a PKeyRef<T>
) -> Result<Signer<'a>, ErrorStack> where
    T: HasPrivate, 

Creates a new Signer.

OpenSSL documentation at EVP_DigestSignInit.

fn rsa_padding(&self) -> Result<Padding, ErrorStack>

Returns the RSA padding mode in use.

This is only useful for RSA keys.

This corresponds to EVP_PKEY_CTX_get_rsa_padding.

fn set_rsa_padding(&mut self, padding: Padding) -> Result<(), ErrorStack>

Sets the RSA padding mode.

This is only useful for RSA keys.

This corresponds to EVP_PKEY_CTX_set_rsa_padding.

fn update(&mut self, buf: &[u8]) -> Result<(), ErrorStack>

Feeds more data into the Signer.

OpenSSL documentation at EVP_DigestUpdate.

fn len(&self) -> Result<usize, ErrorStack>

Computes an upper bound on the signature length.

The actual signature may be shorter than this value. Check the return value of sign to get the exact length.

OpenSSL documentation at EVP_DigestSignFinal.

fn sign(&self, buf: &mut [u8]) -> Result<usize, ErrorStack>

Writes the signature into the provided buffer, returning the number of bytes written.

This method will fail if the buffer is not large enough for the signature. Use the len method to get an upper bound on the required size.

OpenSSL documentation at EVP_DigestSignFinal.

fn sign_to_vec(&self) -> Result<Vec<u8>, ErrorStack>

Returns the signature.

This is a simple convenience wrapper over len and sign.

Trait Implementations

impl<'a> Drop for Signer<'a>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> Write for Signer<'a>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.