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use std;
import std::ptr;
import std::str;
import std::vec;
export hasher;
export hashtype;
export mk_hasher;
export hash;
export _native;
export md5, sha1, sha224, sha256, sha384, sha512;
type hasher = obj {
/*
Method: init
Initializes this hasher
*/
fn init();
/*
Method: update
Update this hasher with more input bytes
*/
fn update([u8]);
/*
Method: final
Return the digest of all bytes added to this hasher since its last
initialization
*/
fn final() -> [u8];
};
tag hashtype {
md5;
sha1;
sha224;
sha256;
sha384;
sha512;
}
#[link_name = "crypto"]
#[abi = "cdecl"]
native mod _native {
type EVP_MD_CTX;
type EVP_MD;
fn EVP_MD_CTX_create() -> EVP_MD_CTX;
fn EVP_md5() -> EVP_MD;
fn EVP_sha1() -> EVP_MD;
fn EVP_sha224() -> EVP_MD;
fn EVP_sha256() -> EVP_MD;
fn EVP_sha384() -> EVP_MD;
fn EVP_sha512() -> EVP_MD;
fn EVP_DigestInit(ctx: EVP_MD_CTX, typ: EVP_MD);
fn EVP_DigestUpdate(ctx: EVP_MD_CTX, data: *u8, n: uint);
fn EVP_DigestFinal(ctx: EVP_MD_CTX, res: *u8, n: *u32);
}
fn evpmd(t: hashtype) -> (_native::EVP_MD, uint) {
alt t {
md5. { (_native::EVP_md5(), 16u) }
sha1. { (_native::EVP_sha1(), 20u) }
sha224. { (_native::EVP_sha224(), 28u) }
sha256. { (_native::EVP_sha256(), 32u) }
sha384. { (_native::EVP_sha384(), 48u) }
sha512. { (_native::EVP_sha512(), 64u) }
}
}
fn mk_hasher(ht: hashtype) -> hasher {
type hasherstate = {
evp: _native::EVP_MD,
ctx: _native::EVP_MD_CTX,
len: uint
};
obj hasher(st: hasherstate) {
fn init() unsafe {
_native::EVP_DigestInit(st.ctx, st.evp);
}
fn update(data: [u8]) unsafe {
let pdata: *u8 = vec::unsafe::to_ptr::<u8>(data);
_native::EVP_DigestUpdate(st.ctx, pdata, vec::len(data));
}
fn final() -> [u8] unsafe {
let res: [mutable u8] = vec::init_elt_mut::<u8>(0u8, st.len);
let pres: *u8 = vec::unsafe::to_ptr::<u8>(res);
_native::EVP_DigestFinal(st.ctx, pres, ptr::null::<u32>());
vec::from_mut::<u8>(res)
}
}
let ctx = _native::EVP_MD_CTX_create();
let (evp, mdlen) = evpmd(ht);
let st = { evp: evp, ctx: ctx, len: mdlen };
let h = hasher(st);
h.init();
ret h;
}
/*
Function: hash
Hashes the supplied input data using hash t, returning the resulting hash value
*/
fn hash(t: hashtype, data: [u8]) -> [u8] unsafe {
let ctx = _native::EVP_MD_CTX_create();
let (evp, mdlen) = evpmd(t);
let res: [mutable u8] = vec::init_elt_mut::<u8>(0u8, mdlen);
let pres: *u8 = vec::unsafe::to_ptr::<u8>(res);
let pdata: *u8 = vec::unsafe::to_ptr::<u8>(data);
_native::EVP_DigestInit(ctx, evp);
_native::EVP_DigestUpdate(ctx, pdata, vec::len(data));
_native::EVP_DigestFinal(ctx, pres, ptr::null::<u32>());
ret vec::from_mut::<u8>(res);
}
#[cfg(test)]
mod tests {
// Test vectors from http://www.nsrl.nist.gov/testdata/
#[test]
fn test_md5() {
let s0 = [0x61u8, 0x62u8, 0x63u8];
let d0 =
[0x90u8, 0x01u8, 0x50u8, 0x98u8, 0x3cu8, 0xd2u8, 0x4fu8, 0xb0u8,
0xd6u8, 0x96u8, 0x3fu8, 0x7du8, 0x28u8, 0xe1u8, 0x7fu8, 0x72u8];
assert(hash(md5, s0) == d0);
}
#[test]
fn test_sha1() {
let s0 = [0x61u8, 0x62u8, 0x63u8];
let d0 =
[0xa9u8, 0x99u8, 0x3eu8, 0x36u8, 0x47u8, 0x06u8, 0x81u8, 0x6au8,
0xbau8, 0x3eu8, 0x25u8, 0x71u8, 0x78u8, 0x50u8, 0xc2u8, 0x6cu8,
0x9cu8, 0xd0u8, 0xd8u8, 0x9du8];
assert(hash(sha1, s0) == d0);
}
#[test]
fn test_sha256() {
let s0 = [0x61u8, 0x62u8, 0x63u8];
let d0 =
[0xbau8, 0x78u8, 0x16u8, 0xbfu8, 0x8fu8, 0x01u8, 0xcfu8, 0xeau8,
0x41u8, 0x41u8, 0x40u8, 0xdeu8, 0x5du8, 0xaeu8, 0x22u8, 0x23u8,
0xb0u8, 0x03u8, 0x61u8, 0xa3u8, 0x96u8, 0x17u8, 0x7au8, 0x9cu8,
0xb4u8, 0x10u8, 0xffu8, 0x61u8, 0xf2u8, 0x00u8, 0x15u8, 0xadu8];
assert(hash(sha256, s0) == d0);
}
}
fn main() {
let h = mk_hasher(sha512);
h.init();
h.update(str::bytes(""));
log h.final();
log hash(sha512, str::bytes(""));
}
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