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#include <stdio.h>
#include <stdlib.h>
#include <nettle/sha1.h>
#define BUF_SIZE 1000
static void
display_hex(unsigned length, uint8_t *data)
{
unsigned i;
for (i = 0; i<length; i++)
printf("%02x ", data[i]);
printf("\n");
}
int
main(int argc, char **argv)
{
struct sha1_ctx ctx;
uint8_t buffer[BUF_SIZE];
uint8_t digest[SHA1_DIGEST_SIZE];
sha1_init(&ctx);
for (;;)
{
int done = fread(buffer, 1, sizeof(buffer), stdin);
sha1_update(&ctx, done, buffer);
if (done < sizeof(buffer))
break;
}
if (ferror(stdin))
return EXIT_FAILURE;
sha1_digest(&ctx, SHA1_DIGEST_SIZE, digest);
display_hex(SHA1_DIGEST_SIZE, digest);
return EXIT_SUCCESS;
}
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