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configure: check for gcrypt if using GnuTLS

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1 - libcurl assumes that there are gcrypt functions available when
GnuTLS is.

2 - GnuTLS can be built to use libnettle instead as crypto library,
which breaks assumption (1)

This change makes configure make sure that if GnuTLS is requested and
detected, it also makes sure that gcrypt is present or it errors
out. This is mostly a way to make the user more aware of this flaw, the
correct fix would be to detect which crypto layer that is in use and
adapt our code to use that instead of blindly assuming gcrypt.

Reported by: Michal Gorny
Bug: http://curl.haxx.se/bug/view.cgi?id=3071038
This commit is contained in:
Daniel Stenberg 2010-09-20 23:05:23 +02:00
parent c47148f142
commit f3df524b62
1 changed files with 14 additions and 0 deletions
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14
configure.ac
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@ -1734,6 +1734,20 @@ if test "$OPENSSL_ENABLED" != "1"; then
fi dnl OPENSSL != 1
dnl ---
dnl If GnuTLS is enabled, we MUST verify that it uses libgcrypt since
dnl curl code relies on that but recent GnuTLS versions can in fact build
dnl with different crypto libraries which curl right now cannot handle
dnl ---
if test "$GNUTLS_ENABLED" = "1"; then
AC_CHECK_LIB(gcrypt,
gcry_control, ,
[
AC_MSG_ERROR([need GnuTLS built with gcrypt to function with GnuTLS])
])
fi
dnl ----------------------------------------------------
dnl check for PolarSSL
dnl ----------------------------------------------------