Struct openssl::encrypt::Decrypter

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

Expand description

A type which decrypts data.

Implementations§

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impl<'a> Decrypter<'a>

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

Creates a new Decrypter.

OpenSSL documentation at EVP_PKEY_decrypt_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 decrypt(&self, from: &[u8], to: &mut [u8]) -> Result<usize, ErrorStack>

Performs public key decryption.

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

let mut decrypter = Decrypter::new(&pkey).unwrap();
decrypter.set_rsa_padding(Padding::PKCS1).unwrap();

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

// Decrypt the data and get its length
let decoded_len = decrypter.decrypt(&input, &mut decoded).unwrap();

// Use only the part of the buffer with the decrypted data
let decoded = &decoded[..decoded_len];