[Buildroot] [PATCH/next] package/libxcrypt: fix conversion error

[Yann E. MORIN <yann.morin.1998@free.fr>]

Guillaume, All,

On 2021-02-20 17:29 +0100, guillaume.bressaix at gmail.com spake thusly:
> From: "Guillaume W. Bres" <guillaume.bressaix@gmail.com>
> 
> Fixes: http://autobuild.buildroot.net/results/e9a058a8c98daf197cd9d7ac632e0cb5707d524f
> 
> Some sensitive compilers may raise a warning that turns into an error on this line.

We usually do not like much that -Werror is used unconditionally,
because newer compiler will inevitably add new warnings that were
unknown at the time the code is written.

Fortunately, libxcrypt has an option to disable it: --disable-werror

Care to send a patch to use it?

> Patch submitted to mainline, waiting for approval, see:
> https://github.com/besser82/libxcrypt/pull/119

As for all things crypto, I'll be waiting for upstream to report, or
for someone more knowledgeable than I to assess this change (I think it
is OK, but the Debian fix in openssl taught me to be warry of fixes that
look OK ;-] )

Thanks, I'm keeping a tab on this one for a few more days...

Regards,
Yann E. MORIN.

> Signed-off-by: Guillaume W. Bres <guillaume.bressaix@gmail.com>
> ---
>  ...gost3411-core.c-fix-conversion-error.patch | 26 +++++++++++++++++++
>  1 file changed, 26 insertions(+)
>  create mode 100644 package/libxcrypt/0001-lib-alg-gost3411-core.c-fix-conversion-error.patch
> 
> diff --git a/package/libxcrypt/0001-lib-alg-gost3411-core.c-fix-conversion-error.patch b/package/libxcrypt/0001-lib-alg-gost3411-core.c-fix-conversion-error.patch
> new file mode 100644
> index 0000000000..5488d15a3d
> --- /dev/null
> +++ b/package/libxcrypt/0001-lib-alg-gost3411-core.c-fix-conversion-error.patch
> @@ -0,0 +1,26 @@
> +From c7bf2cf8e610bb26bece7f3a2bc5b47d7c659c7d Mon Sep 17 00:00:00 2001
> +From: "Guillaume W. Bres" <guillaume.bressaix@gmail.com>
> +Date: Sat, 20 Feb 2021 16:51:04 +0100
> +Subject: [PATCH] lib/alg-gost3411-core.c: fix conversion error
> +
> +Signed-off-by: Guillaume W. Bres <guillaume.bressaix@gmail.com>
> +---
> + lib/alg-gost3411-2012-core.c | 2 +-
> + 1 file changed, 1 insertion(+), 1 deletion(-)
> +
> +diff --git a/lib/alg-gost3411-2012-core.c b/lib/alg-gost3411-2012-core.c
> +index 13bb493..af3a36e 100644
> +--- a/lib/alg-gost3411-2012-core.c
> ++++ b/lib/alg-gost3411-2012-core.c
> +@@ -92,7 +92,7 @@ add512(const uint512_u *x, const uint512_u *y, uint512_u *r)
> +     for (i = 0; i < 64; i++)
> +     {
> +         buf = xp[i] + yp[i] + (buf >> 8);
> +-        rp[i] = (unsigned char) buf & 0xFF;
> ++        rp[i] = (unsigned char) (buf & 0xFF);
> +     }
> + #endif
> + }
> +--
> +2.20.1
> +
> -- 
> 2.20.1
> 
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