93 lines
2.4 KiB
Rust
93 lines
2.4 KiB
Rust
/*
|
|
* Copyright 2013 Jack Lloyd
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
use hash::*;
|
|
|
|
#[allow(non_camel_case_types)]
|
|
struct HMAC_CTX {
|
|
mut md: EVP_MD,
|
|
mut md_ctx: EVP_MD_CTX,
|
|
mut i_ctx: EVP_MD_CTX,
|
|
mut o_ctx: EVP_MD_CTX,
|
|
mut key_length: libc::c_uint,
|
|
mut key: [libc::c_uchar * 128]
|
|
}
|
|
|
|
#[link_name = "crypto"]
|
|
#[abi = "cdecl"]
|
|
extern mod libcrypto {
|
|
|
|
fn HMAC_CTX_init(ctx: *mut HMAC_CTX, key: *u8, keylen: libc::c_int, md: EVP_MD);
|
|
|
|
fn HMAC_Update(ctx: *mut HMAC_CTX, input: *u8, len: libc::c_uint);
|
|
|
|
fn HMAC_Final(ctx: *mut HMAC_CTX, output: *mut u8, len: *mut libc::c_uint);
|
|
}
|
|
|
|
pub struct HMAC {
|
|
priv mut ctx: HMAC_CTX,
|
|
priv len: uint,
|
|
}
|
|
|
|
pub fn HMAC(ht: HashType, key: ~[u8]) -> HMAC {
|
|
unsafe {
|
|
|
|
let (evp, mdlen) = evpmd(ht);
|
|
|
|
let mut ctx : HMAC_CTX = HMAC_CTX {
|
|
mut md: ptr::null(),
|
|
mut md_ctx: ptr::null(),
|
|
mut i_ctx: ptr::null(),
|
|
mut o_ctx: ptr::null(),
|
|
mut key_length: 0,
|
|
mut key: [0u8, .. 128]
|
|
};
|
|
|
|
libcrypto::HMAC_CTX_init(&mut ctx,
|
|
vec::raw::to_ptr(key),
|
|
key.len() as libc::c_int,
|
|
evp);
|
|
|
|
HMAC { ctx: ctx, len: mdlen }
|
|
}
|
|
}
|
|
|
|
pub impl HMAC {
|
|
fn update(data: &[u8]) unsafe {
|
|
do vec::as_imm_buf(data) |pdata, len| {
|
|
libcrypto::HMAC_Update(&mut self.ctx, pdata, len as libc::c_uint)
|
|
}
|
|
}
|
|
|
|
fn final() -> ~[u8] unsafe {
|
|
let mut res = vec::from_elem(self.len, 0u8);
|
|
let mut outlen: libc::c_uint = 0;
|
|
do vec::as_mut_buf(res) |pres, _len| {
|
|
libcrypto::HMAC_Final(&mut self.ctx, pres, &mut outlen);
|
|
assert self.len == outlen as uint
|
|
}
|
|
res
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let h = HMAC(SHA512, ~[00u8]);
|
|
|
|
h.update(~[00u8]);
|
|
|
|
io::println(fmt!("%?", h.final()))
|
|
}
|