/*
* SHA-256 hash implementation and interface functions
- * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include "sha256.h"
#include "crypto.h"
+#define SHA256_BLOCK_SIZE 64
+
struct sha256_state {
u64 length;
u32 state[8], curlen;
- u8 buf[64];
+ u8 buf[SHA256_BLOCK_SIZE];
};
static void sha256_init(struct sha256_state *md);
unsigned long inlen)
{
unsigned long n;
-#define block_size 64
- if (md->curlen > sizeof(md->buf))
+ if (md->curlen >= sizeof(md->buf))
return -1;
while (inlen > 0) {
- if (md->curlen == 0 && inlen >= block_size) {
+ if (md->curlen == 0 && inlen >= SHA256_BLOCK_SIZE) {
if (sha256_compress(md, (unsigned char *) in) < 0)
return -1;
- md->length += block_size * 8;
- in += block_size;
- inlen -= block_size;
+ md->length += SHA256_BLOCK_SIZE * 8;
+ in += SHA256_BLOCK_SIZE;
+ inlen -= SHA256_BLOCK_SIZE;
} else {
- n = MIN(inlen, (block_size - md->curlen));
+ n = MIN(inlen, (SHA256_BLOCK_SIZE - md->curlen));
os_memcpy(md->buf + md->curlen, in, n);
md->curlen += n;
in += n;
inlen -= n;
- if (md->curlen == block_size) {
+ if (md->curlen == SHA256_BLOCK_SIZE) {
if (sha256_compress(md, md->buf) < 0)
return -1;
- md->length += 8 * block_size;
+ md->length += 8 * SHA256_BLOCK_SIZE;
md->curlen = 0;
}
}
* encoding like normal.
*/
if (md->curlen > 56) {
- while (md->curlen < 64) {
+ while (md->curlen < SHA256_BLOCK_SIZE) {
md->buf[md->curlen++] = (unsigned char) 0;
}
sha256_compress(md, md->buf);
md->curlen = 0;
}
- /* pad upto 56 bytes of zeroes */
+ /* pad up to 56 bytes of zeroes */
while (md->curlen < 56) {
md->buf[md->curlen++] = (unsigned char) 0;
}