Compiling

Compile with `gcc -Wall -lssl -lcrypto shait.c`

shait.c

#include <stdio.h>
#include <openssl/sha.h>

int main(int argc,char **argv)
{
  SHA256_CTX context;
  unsigned char md[SHA256_DIGEST_LENGTH];

  SHA256_Init(&context);
  SHA256_Update(&context, "hello world", 11);
  SHA256_Final(md, &context);

  return 0;
}