Is there a simple C or C++ function that calculates the sha1 hash of a string? [duplicate]

Question

Possible Duplicate:
sha1 function in cpp (C++)Hi,

I was just looking for a function that calculates the sha1 hash of string and returns the result.

Answer 1

Not built-in. Try openssl's crypto library.

(https://www.openssl.org/source/)

(https://github.com/openssl/openssl/blob/master/include/openssl/sha.h)

(https://www.openssl.org/docs/man1.1.0/crypto/SHA1.html)

#include <openssl/sha.h>

int main()
{  
  const unsigned char str[] = "Original String";
  unsigned char hash[SHA_DIGEST_LENGTH]; // == 20

  SHA1(str, sizeof(str) - 1, hash);

  // do some stuff with the hash

  return 0;
}

Link with -lssl, which will imply -lcrypto. If you are linking statically you might need to link both.