md5, sha1, sha256, sha512: use openssl routines if available --with-openssl the libcrypto md5, sha1, sha224, sha256, sha384, sha256 routines will be used if available, requiring apps to link @LIB_CRYPTO@ * lib/gl_openssl.h: Provide wrappers for specified openssl hash. * m4/gl-openssl.m4 (gl_CRYPTO_CHECK): New function to lookup libcrypto in the standard system location. * m4/sha1.m4: Call gl_CRYPTO_CHECK() for SHA1. * m4/sha256.m4: Likewise with SHA256. * m4/sha512.m4: Likewise with SHA512. * m4/md5.m4: Likewise with MD5. * m4/gc.m4: Ensure @LIB_CRYPTO@ set for tests. * lib/sha1.h: Include wrappers if HAVE_OPENSSL_SHA1. * lib/sha256.h: Likewise with SHA256. * lib/sha512.h: Likewise with SHA512. * lib/md5.h: Likewise with MD5. * lib/sha1.c: Exlude functionality if HAVE_OPENSSL_SHA1. * lib/sha256.c: Likewise with SHA256. * lib/sha512.c: Likewise with SHA512. * lib/md5.c: Likewise with MD5. * modules/crypto/sha1 (Link:): Add the new optional lib. (Depends-on:): Add dependency on extern-inline. * modules/crypto/sha256: Likewise. * modules/crypto/sha512: Likewise. * modules/crypto/md5: Likewise. * modules/crypto/sha1-tests: Reference the lib here too. * modules/crypto/md5-tests: Likewise. * modules/crypto/gc-des-tests: Likewise. * modules/crypto/gc-hmac-md5-tests: Likewise. * modules/crypto/gc-hmac-sha1-tests: Likewise. * modules/crypto/gc-hmac-sha256-tests: Likewise. * modules/crypto/gc-hmac-sha512-tests: Likewise. * modules/crypto/gc-md5-tests: Likewise. * modules/crypto/gc-pbkdf2-sha1-tests: Likewise. * modules/crypto/gc-sha1-tests: Likewise. * modules/crypto/gc-tests: Likewise. * modules/crypto/hmac-md5-tests: Likewise. * modules/crypto/hmac-sha1-tests: Likewise. * modules/crypto/hmac-sha256-tests: Likewise. * modules/crypto/hmac-sha512-tests: Likewise.

# gl-openssl.m4 serial 1
dnl Copyright (C) 2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_CRYPTO_CHECK],
[
  AC_ARG_WITH([openssl],
    [AS_HELP_STRING([--with-openssl],
      [use libcrypto hash routines if available: default=no])],
    [],
    [with_openssl=no])

  if test "x$1" = xMD5; then
    ALG_header=md5.h
  else
    ALG_header=sha.h
  fi

  LIB_CRYPTO=
  AC_SUBST([LIB_CRYPTO])
  if test "x$with_openssl" != xno; then
    AC_CHECK_LIB([crypto], [$1],
      [AC_CHECK_HEADERS([openssl/$ALG_header],
        [LIB_CRYPTO='-lcrypto'
         AC_DEFINE([HAVE_OPENSSL_$1],[1],
           [Define to 1 if libcrypto is used for $1])])])
    if test "x$with_openssl" = xyes; then
      if test "x$LIB_CRYPTO" = x; then
        AC_MSG_WARN([openssl development library not found for $1])
      fi
    fi
  fi
])