Re: [PATCH 3/3] configure.ac: check for HMAC_CTX_cleanup

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On Thu, Jan 8, 2015 at 3:00 PM, Reuben Hawkins <reubenhwk@xxxxxxxxx> wrote:
> OpenSSL version 0.9.6b and before defined the function HMAC_cleanup.
> Newer versions define HMAC_CTX_cleanup.  Check for HMAC_CTX_cleanup and
> fall back to HMAC_cleanup when the newer function is missing.
>
> Signed-off-by: Reuben Hawkins <reubenhwk@xxxxxxxxx>

Reviewed-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>

Note that this patch has a minor and simple-to-resolve conflict with
b195aa00c1 (git-compat-util: suppress unavoidable Apple-specific
deprecation warnings; 2014-12-16) which was just promoted to master.
Junio may resolve it locally or ask you to re-send.

> ---
> diff --git a/Makefile b/Makefile
> index 57e33f2..2ce1f1f 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -341,6 +341,9 @@ all::
>  # Define HAVE_CLOCK_GETTIME if your platform has clock_gettime in librt.
>  #
>  # Define HAVE_CLOCK_MONOTONIC if your platform has CLOCK_MONOTONIC in librt.
> +#
> +# Define NO_HMAC_CTX_CLEANUP if your OpenSSL is version 0.9.6b or earlier to
> +# cleanup the HMAC context with the older HMAC_cleanup function.
>
>  GIT-VERSION-FILE: FORCE
>         @$(SHELL_PATH) ./GIT-VERSION-GEN
> @@ -1061,6 +1064,9 @@ ifndef NO_OPENSSL
>         ifdef NEEDS_CRYPTO_WITH_SSL
>                 OPENSSL_LIBSSL += -lcrypto
>         endif
> +       ifdef NO_HMAC_CTX_CLEANUP
> +               BASIC_CFLAGS += -DNO_HMAC_CTX_CLEANUP
> +       endif
>  else
>         BASIC_CFLAGS += -DNO_OPENSSL
>         BLK_SHA1 = 1
> diff --git a/configure.ac b/configure.ac
> index c3293b9..9c66c3e 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -924,6 +924,10 @@ AC_CHECK_LIB([iconv], [locale_charset],
>                       [CHARSET_LIB=-lcharset])])
>  GIT_CONF_SUBST([CHARSET_LIB])
>  #
> +# Define NO_HMAC_CTX_CLEANUP=YesPlease if HMAC_CTX_cleanup is missing.
> +AC_CHECK_LIB([crypto], [HMAC_CTX_cleanup],
> +       [], [GIT_CONF_SUBST([NO_HMAC_CTX_CLEANUP], [YesPlease])])
> +#
>  # Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
>  GIT_CHECK_FUNC(clock_gettime,
>         [HAVE_CLOCK_GETTIME=YesPlease],
> diff --git a/git-compat-util.h b/git-compat-util.h
> index 400e921..2fdca2d 100644
> --- a/git-compat-util.h
> +++ b/git-compat-util.h
> @@ -213,6 +213,9 @@ extern char *gitbasename(char *);
>  #ifndef NO_OPENSSL
>  #include <openssl/ssl.h>
>  #include <openssl/err.h>
> +#ifdef NO_HMAC_CTX_CLEANUP
> +#define HMAC_CTX_cleanup HMAC_cleanup
> +#endif
>  #endif
>
>  /* On most systems <netdb.h> would have given us this, but
> --
> 2.2.0.68.g8f72f0c.dirty
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