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Revision 1.6, Fri Nov 29 00:11:21 2019 UTC (4 years, 5 months ago) by djm
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, HEAD
Changes since 1.5: +22 -8 lines 

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

/* $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 */