Unverified Commit 3ce37772 authored by Steven Fackler's avatar Steven Fackler
Browse files

Add CipherCtxRef::rand_key

parent 73dc373e

openssl-sys/src/evp.rs

+1 −0
Original line number Diff line number Diff line
@@ -323,6 +323,7 @@ extern "C" { 
        arg: c_int,

        ptr: *mut c_void,

    ) -> c_int;

    pub fn EVP_CIPHER_CTX_rand_key(ctx: *mut EVP_CIPHER_CTX, key: *mut c_uchar) -> c_int;



    pub fn EVP_md_null() -> *const EVP_MD;

    pub fn EVP_md5() -> *const EVP_MD;

openssl/src/cipher_ctx.rs

+23 −0
Original line number Diff line number Diff line
@@ -320,6 +320,29 @@ impl CipherCtxRef { 
        unsafe { ffi::EVP_CIPHER_CTX_key_length(self.as_ptr()) as usize }

    }



    /// Generates a random key based on the configured cipher.

    ///

    /// # Panics

    ///

    /// Panics if the context has not been initialized with a cipher or if the buffer is smaller than the cipher's key

    /// length.

    ///

    /// This corresponds to [`EVP_CIPHER_CTX_rand_key`].

    ///

    /// [`EVP_CIPHER_CTX_rand_key`]: https://www.openssl.org/docs/manmaster/man3/EVP_CIPHER_CTX_rand_key.html

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

        assert!(buf.len() >= self.key_length());



        unsafe {

            cvt(ffi::EVP_CIPHER_CTX_rand_key(

                self.as_ptr(),

                buf.as_mut_ptr(),

            ))?;

        }



        Ok(())

    }



    /// Sets the length of the key expected by the context.

    ///

    /// Only some ciphers support configurable key lengths.