IABSD.fr/src/usr.bin/ssh/hash.c

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• Author : djm
  Date : 2019-11-29 00:11:21
  Hash : a2f7fe09
  Message : perform hashing directly in crypto_hash_sha512() using libcrypto or libc SHA512 functions rather than calling ssh_digest_memory(); avoids many dependencies on ssh code that complicate standalone use of ed25519, as we want to do in sk-dummy.so

• usr.bin/ssh/hash.c

• /* $OpenBSD: hash.c,v 1.6 2019/11/29 00:11:21 djm Exp $ */
  /*
   * Public domain. Author: Christian Weisgerber <naddy@openbsd.org>
   * API compatible reimplementation of function from nacl
   */
  
  #include "crypto_api.h"
  
  #include <stdarg.h>
  
  #ifdef WITH_OPENSSL
  #include <openssl/evp.h>
  
  int
  crypto_hash_sha512(unsigned char *out, const unsigned char *in,
      unsigned long long inlen)
  {
  
  	if (!EVP_Digest(in, inlen, out, NULL, EVP_sha512(), NULL))
  		return -1;
  	return 0;
  }
  
  #else
  #include <sha2.h>
  
  int
  crypto_hash_sha512(unsigned char *out, const unsigned char *in,
      unsigned long long inlen)
  {
  
  	SHA2_CTX ctx;
  
  	SHA512Init(&ctx);
  	SHA512Update(&ctx, in, inlen);
  	SHA512Final(out, &ctx);
  	return 0;
  }
  #endif /* WITH_OPENSSL */