Struct Encrypter

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pub struct Encrypter<'a> { /* private fields */ }

Expand description

A type which encrypts data.

Implementations§

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impl<'a> Encrypter<'a>

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pub fn new<T>(pkey: &'a PKeyRef<T>) -> Result<Encrypter<'a>, ErrorStack>
where T: HasPublic,

Creates a new Encrypter.

OpenSSL documentation at EVP_PKEY_encrypt_init.

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pub 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.

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pub 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.

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pub fn set_rsa_mgf1_md(&mut self, md: MessageDigest) -> Result<(), ErrorStack>

Sets the RSA MGF1 algorithm.

This is only useful for RSA keys.

This corresponds to EVP_PKEY_CTX_set_rsa_mgf1_md.

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pub fn set_rsa_oaep_md(&mut self, md: MessageDigest) -> Result<(), ErrorStack>

Sets the RSA OAEP algorithm.

This is only useful for RSA keys.

This corresponds to EVP_PKEY_CTX_set_rsa_oaep_md.

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pub fn set_rsa_oaep_label(&mut self, label: &[u8]) -> Result<(), ErrorStack>

Sets the RSA OAEP label.

This is only useful for RSA keys.

This corresponds to EVP_PKEY_CTX_set0_rsa_oaep_label.

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pub fn encrypt(&self, from: &[u8], to: &mut [u8]) -> Result<usize, ErrorStack>

Performs public key encryption.

In order to know the size needed for the output buffer, use encrypt_len. Note that the length of the output buffer can be greater of the length of the encoded data.

let mut encrypter = Encrypter::new(&pkey).unwrap();
encrypter.set_rsa_padding(Padding::PKCS1).unwrap();

// Get the length of the output buffer
let buffer_len = encrypter.encrypt_len(&input).unwrap();
let mut encoded = vec![0u8; buffer_len];

// Encode the data and get its length
let encoded_len = encrypter.encrypt(&input, &mut encoded).unwrap();

// Use only the part of the buffer with the encoded data
let encoded = &encoded[..encoded_len];