app-crypt/p11-kit: fix modern c issue (32-bit ptr truncation)

Closes: https://bugs.gentoo.org/918982
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 187 insertions, 0 deletions

diff --git a/app-crypt/p11-kit/files/p11-kit-0.25.3-pointer.patch b/app-crypt/p11-kit/files/p11-kit-0.25.3-pointer.patch
new file mode 100644
index 000000000000..feac3e132fce
--- /dev/null
+++ b/app-crypt/p11-kit/files/p11-kit-0.25.3-pointer.patch
@@ -0,0 +1,111 @@
+https://bugs.gentoo.org/918982
+https://github.com/p11-glue/p11-kit/pull/609
+
+From 6f05ca107d588fcedaa4ef06542760cbbda8c878 Mon Sep 17 00:00:00 2001
+From: Daiki Ueno <ueno@gnu.org>
+Date: Sat, 2 Dec 2023 09:24:01 +0900
+Subject: [PATCH] import-object: Avoid integer truncation on 32-bit platforms
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The build fails when compiling for 32-bit platforms with
+-Werror=incompatible-pointer-types:
+
+  CFLAGS="-m32 -march=i686 -Werror=incompatible-pointer-types -Werror=implicit -Werror=int-conversion" setarch i686 -- meson setup _build
+  setarch i686 -- meson compile -C _build -v
+  ...
+
+  ../p11-kit/import-object.c: In function ‘add_attrs_pubkey_rsa’:
+  ../p11-kit/import-object.c:223:62: error: passing argument 3 of ‘p11_asn1_read’ from incompatible pointer type [-Werror=incompatible-pointer-types]
+    223 |         attr_modulus.pValue = p11_asn1_read (asn, "modulus", &attr_modulus.ulValueLen);
+        |                                                              ^~~~~~~~~~~~~~~~~~~~~~~~
+        |                                                              |
+        |                                                              long unsigned int *
+
+Reported by Sam James in:
+https://github.com/p11-glue/p11-kit/issues/608
+
+Signed-off-by: Daiki Ueno <ueno@gnu.org>
+---
+ p11-kit/import-object.c | 32 ++++++++++++++++++++++++++++----
+ 1 file changed, 28 insertions(+), 4 deletions(-)
+
+diff --git a/p11-kit/import-object.c b/p11-kit/import-object.c
+index feee0765..278ad932 100644
+--- a/p11-kit/import-object.c
++++ b/p11-kit/import-object.c
+@@ -55,6 +55,7 @@
+ #endif
+ 
+ #include <assert.h>
++#include <limits.h>
+ #include <stdbool.h>
+ #include <stdlib.h>
+ #include <string.h>
+@@ -201,6 +202,7 @@ add_attrs_pubkey_rsa (CK_ATTRIBUTE *attrs,
+ 	CK_ATTRIBUTE attr_encrypt = { CKA_ENCRYPT, &tval, sizeof (tval) };
+ 	CK_ATTRIBUTE attr_modulus = { CKA_MODULUS, };
+ 	CK_ATTRIBUTE attr_exponent = { CKA_PUBLIC_EXPONENT, };
++	size_t len;
+ 
+ 	pubkey = p11_asn1_read (info, "subjectPublicKey", &pubkey_len);
+ 	if (pubkey == NULL) {
+@@ -220,17 +222,31 @@ add_attrs_pubkey_rsa (CK_ATTRIBUTE *attrs,
+ 		goto cleanup;
+ 	}
+ 
+-	attr_modulus.pValue = p11_asn1_read (asn, "modulus", &attr_modulus.ulValueLen);
++	attr_modulus.pValue = p11_asn1_read (asn, "modulus", &len);
+ 	if (attr_modulus.pValue == NULL) {
+ 		p11_message (_("failed to obtain modulus"));
+ 		goto cleanup;
+ 	}
++#if ULONG_MAX < SIZE_MAX
++	if (len > ULONG_MAX) {
++		p11_message (_("failed to obtain modulus"));
++		goto cleanup;
++	}
++#endif
++	attr_modulus.ulValueLen = len;
+ 
+-	attr_exponent.pValue = p11_asn1_read (asn, "publicExponent", &attr_exponent.ulValueLen);
+-	if (attr_exponent.pValue == NULL) {
++	attr_exponent.pValue = p11_asn1_read (asn, "publicExponent", &len);
++	if (attr_exponent.pValue == NULL || len > ULONG_MAX) {
++		p11_message (_("failed to obtain exponent"));
++		goto cleanup;
++	}
++#if ULONG_MAX < SIZE_MAX
++	if (len > ULONG_MAX) {
+ 		p11_message (_("failed to obtain exponent"));
+ 		goto cleanup;
+ 	}
++#endif
++	attr_exponent.ulValueLen = len;
+ 
+ 	result = p11_attrs_build (attrs, &attr_key_type, &attr_encrypt, &attr_modulus, &attr_exponent, NULL);
+ 	if (result == NULL) {
+@@ -260,12 +276,20 @@ add_attrs_pubkey_ec (CK_ATTRIBUTE *attrs,
+ 	CK_ATTRIBUTE attr_key_type = { CKA_KEY_TYPE, &key_type, sizeof (key_type) };
+ 	CK_ATTRIBUTE attr_ec_params = { CKA_EC_PARAMS, };
+ 	CK_ATTRIBUTE attr_ec_point = { CKA_EC_POINT, };
++	size_t len;
+ 
+-	attr_ec_params.pValue = p11_asn1_read (info, "algorithm.parameters", &attr_ec_params.ulValueLen);
++	attr_ec_params.pValue = p11_asn1_read (info, "algorithm.parameters", &len);
+ 	if (attr_ec_params.pValue == NULL) {
+ 		p11_message (_("failed to obtain EC parameters"));
+ 		goto cleanup;
+ 	}
++#if ULONG_MAX < SIZE_MAX
++	if (len > ULONG_MAX) {
++		p11_message (_("failed to obtain EC parameters"));
++		goto cleanup;
++	}
++#endif
++	attr_ec_params.ulValueLen = len;
+ 
+ 	/* subjectPublicKey is read as BIT STRING value which contains
+ 	 * EC point data. We need to DER encode this data as OCTET STRING.
+
diff --git a/app-crypt/p11-kit/p11-kit-0.25.3-r1.ebuild b/app-crypt/p11-kit/p11-kit-0.25.3-r1.ebuild
new file mode 100644
index 000000000000..acb110fc1090
--- /dev/null
+++ b/app-crypt/p11-kit/p11-kit-0.25.3-r1.ebuild
@@ -0,0 +1,76 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit bash-completion-r1 meson-multilib python-any-r1
+
+DESCRIPTION="Provides a standard configuration setup for installing PKCS#11"
+HOMEPAGE="https://p11-glue.github.io/p11-glue/p11-kit.html"
+SRC_URI="https://github.com/p11-glue/p11-kit/releases/download/${PV}/${P}.tar.xz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="+libffi gtk-doc nls systemd test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	app-misc/ca-certificates
+	>=dev-libs/libtasn1-3.4:=[${MULTILIB_USEDEP}]
+	libffi? ( dev-libs/libffi:=[${MULTILIB_USEDEP}] )
+	systemd? ( sys-apps/systemd:= )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	${PYTHON_DEPS}
+	app-text/docbook-xsl-stylesheets
+	virtual/pkgconfig
+	gtk-doc? ( dev-util/gtk-doc )
+	nls? ( sys-devel/gettext )
+"
+
+PATCHES=(
+	"${FILESDIR}"/p11-kit-0.25.3-pointer.patch
+)
+
+src_prepare() {
+	default
+
+	# Relies on dlopen which won't work for multilib tests (bug #913971)
+	cat <<-EOF > "${S}"/p11-kit/test-server.sh || die
+	#!/bin/sh
+	exit 77
+	EOF
+}
+
+multilib_src_configure() {
+	# Disable unsafe tests, bug#502088
+	export FAKED_MODE=1
+
+	local native_file="${T}"/meson.${CHOST}.${ABI}.ini.local
+
+	# p11-kit doesn't need this to build and castxml needs Clang. To get
+	# a deterministic non-automagic build, always disable the search for
+	# castxml.
+	cat >> ${native_file} <<-EOF || die
+	[binaries]
+	castxml='castxml-falseified'
+	EOF
+
+	local emesonargs=(
+		--native-file "${native_file}"
+		-Dbashcompdir="$(get_bashcompdir)"
+		-Dtrust_module=enabled
+		-Dtrust_paths="${EPREFIX}"/etc/ssl/certs/ca-certificates.crt
+		$(meson_feature libffi)
+		$(meson_use nls)
+		$(meson_use test)
+		$(meson_native_use_bool gtk-doc gtk_doc)
+		$(meson_native_true man)
+		$(meson_native_use_feature systemd)
+	)
+
+	meson_src_configure
+}