Struct openssl::encrypt::Decrypter

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

A type which decrypts data.

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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];

This corresponds to EVP_PKEY_decrypt.

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

Gets the size of the buffer needed to decrypt the input data.

This corresponds to EVP_PKEY_decrypt called with a null pointer as output argument.

Trait Implementations§

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impl<'a> Drop for Decrypter<'a>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<'a> Send for Decrypter<'a>

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impl<'a> Sync for Decrypter<'a>

Auto Trait Implementations§

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impl<'a> Freeze for Decrypter<'a>

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impl<'a> RefUnwindSafe for Decrypter<'a>

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impl<'a> Unpin for Decrypter<'a>

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impl<'a> UnwindSafe for Decrypter<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.