RFC: exporting sha256 sha512

[Shawn Landden <shawnlandden at gmail dot com>]

we already have this in crypt
proposed public header <sha2.h> below

even git does not use Intel processor extensions. This stuff in
non-trivial and there is lots of duplicated work being done. Makes
sense for glibc to be "high performance" as advertised and collect
this performance work.

would a patch for this be considered?

#pragma once

#include <stdint.h>

typedef struct {
       char __internal_state[104];
} sha256_ctx;

void *sha256(const void *d, size_t n, void *md);
void sha256_init(sha256_ctx *s);
void sha256_push(sha256_ctx *s, const void *d, size_t n);
void sha256_finish(sha256_ctx *s, void *md);

typedef struct {
       char __internal_state[200];
} sha512_ctx;

void *sha512(const void *d, size_t n, void *md);
void sha512_init(sha512_ctx *s);
void sha512_push(sha512_ctx *s, const void *d, size_t n);
void sha512_finish(sha512_ctx *s, void *md);

-- 
Liberty equality fraternity or death,

Shawn Landden
ChurchOfGit.com