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

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sha1 func开发者_如何转开发tion in cpp (C++)Hi,

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

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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.

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CryptoPP is a great C++ library for cryptographic functions. It has a method for calculating a SHA1 digest. See examples of the hashing functions here.

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libgcrypt

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Here's an example: http://www.codeproject.com/KB/recipes/csha1.aspx#csha1is

Also, this question was already addressed on this thread. They have a link for some further help. Check it out.

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Check out this post on Ubuntu Forums. They suggest looking in libcrypt.

Also there's an implementation here but I'm not sure what the license is.

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You need to use a library. Boost has this functionality.