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/*
commandline/nacl-sha256.c version 20080713
D. J. Bernstein
Public domain.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "crypto_hash_sha256.h"
unsigned char *input;
unsigned long long inputalloc;
unsigned long long inputlen;
unsigned char h[crypto_hash_sha256_BYTES];
void h_print(void)
{
int i;
for (i = 0;i < crypto_hash_sha256_BYTES;++i) printf("%02x",255 & (int) h[i]);
printf("\n");
}
int main()
{
struct stat st;
int ch;
if (fstat(0,&st) == 0) {
input = mmap(0,st.st_size,PROT_READ,MAP_SHARED,0,0);
if (input != MAP_FAILED) {
crypto_hash_sha256(h,input,st.st_size);
h_print();
return 0;
}
}
input = 0;
inputalloc = 0;
inputlen = 0;
while ((ch = getchar()) != EOF) {
if (inputlen >= inputalloc) {
void *newinput;
while (inputlen >= inputalloc)
inputalloc = inputalloc * 2 + 1;
if (posix_memalign(&newinput,16,inputalloc) != 0) return 111;
memcpy(newinput,input,inputlen);
free(input);
input = newinput;
}
input[inputlen++] = ch;
}
crypto_hash_sha256(h,input,inputlen);
h_print();
return 0;
}
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