From http://en.wikipedia.org/wiki/Malloc#Casting_and_type_safety
" Casting and type safety
malloc returns a void pointer (void *), which indicates that it is a
pointer to a region of unknown data type. One may "cast" (see type
conversion) this pointer to a specific type, as in
int *ptr = (int*)malloc(10 * sizeof (int));
When using C, this is considered bad practice; it is redundant under the
C standard. Moreover, putting in a cast may mask failure to include the
header stdlib.h, in which the prototype for malloc is found. In the
absence of a prototype for malloc, the C compiler will assume that
malloc returns an int, and will issue a warning in a context such as the
above, provided the error is not masked by a cast. On certain
architectures and data models (such as LP64 on 64 bit systems, where
long and pointers are 64 bit and int is 32 bit), this error can actually
result in undefined behavior, as the implicitly declared malloc returns
a 32 bit value whereas the actually defined function returns a 64 bit
value. Depending on calling conventions and memory layout, this may
result in stack smashing.
The returned pointer need not be explicitly cast to a more specific
pointer type, since ANSI C defines an implicit conversion between the
void pointer type and other pointers to objects. An explicit cast of
malloc's return value is sometimes performed because malloc originally
returned a char *, but this cast is unnecessary in standard C
code.[4][5] Omitting the cast, however, creates an incompatibility with
C++, which does require it.
The lack of a specific pointer type returned from malloc is type-unsafe
behaviour: malloc allocates based on byte count but not on type. This
distinguishes it from the C++ new operator that returns a pointer whose
type relies on the operand. (see C Type Safety). "
See also
http://www.opensc-project.org/pipermail/opensc-devel/2010-August/014586.html
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@4636 c6295689-39f2-0310-b995-f0e70906c6a9
1. Build system now supports MinGW (Windows) compilation using msys and cross compilation.
2. Ability to explicitly disable and enable dependencies of the package.
3. openct, pcsc and nsplugins features are disabled by default.
4. Modified pcsc driver to use pcsc dynamically, no compile time dependency is required.
5. --enable-pcsc-lite configuration option renamed to --enable-pcsc.
6. Install opensc.conf file (as opensc.conf.new if opensc.conf exists).
7. Add--enable-doc configuration option, allow installing documentation into target.
8. Add --disable-man configuration option, allow msys mingw32 users to
build from svn without extra dependencies.
9. Add export files to each library in order to export only required symbols.
Windows native build may use these files instead of scanning objects' symbols.
10. Add opensc-tool --info to display some general information about the build.
11. Create compatibility library to be linked against library instread of recompiling the
same source files in different places.
12. Add different win32 version resource to each class of outputs.
13. Make xsl-stylesheets location selectable.
14. Some win32 fixups.
15. Some warning fixups.
16. Many other autoconf/automake cleanups.
Alon Bar-Lev
svn diff -r 3315:3399 https://www.opensc-project.org/svn/opensc/branches/alonbl/mingw
_M .
D configure.in
_M src
_M src/openssh
M src/openssh/Makefile.am
_M src/tools
M src/tools/rutoken-tool.c
M src/tools/opensc-tool.c
M src/tools/cardos-info.c
M src/tools/pkcs15-crypt.c
M src/tools/pkcs15-init.c
M src/tools/piv-tool.c
M src/tools/netkey-tool.c
M src/tools/eidenv.c
M src/tools/cryptoflex-tool.c
M src/tools/util.c
M src/tools/pkcs11-tool.c
M src/tools/pkcs15-tool.c
M src/tools/util.h
M src/tools/opensc-explorer.c
M src/tools/Makefile.am
_M src/pkcs11
M src/pkcs11/pkcs11-global.c
M src/pkcs11/framework-pkcs15.c
M src/pkcs11/mechanism.c
M src/pkcs11/pkcs11-display.c
M src/pkcs11/pkcs11-object.c
A src/pkcs11/opensc-pkcs11.exports
M src/pkcs11/sc-pkcs11.h
M src/pkcs11/pkcs11-spy.c
M src/pkcs11/openssl.c
M src/pkcs11/Makefile.am
A src/pkcs11/pkcs11-spy.exports
_M src/tests
_M src/tests/regression
M src/tests/regression/Makefile.am
M src/tests/sc-test.c
M src/tests/pintest.c
M src/tests/Makefile.am
_M src/include
_M src/include/opensc
M src/include/opensc/Makefile.am
A src/include/opensc/svnignore
M src/include/Makefile.am
_M src/signer
_M src/signer/npinclude
M src/signer/npinclude/Makefile.am
M src/signer/Makefile.am
A src/signer/signer.exports
_M src/common
A src/common/compat_dummy.c
D src/common/getopt.txt
D src/common/strlcpy.c
D src/common/LICENSE
A src/common/compat_getopt.txt
A src/common/compat_strlcpy.c
A src/common/LICENSE.compat_getopt
A src/common/compat_getopt.c
D src/common/strlcpy.h
D src/common/ChangeLog
D src/common/getpass.c
D src/common/my_getopt.c
A src/common/compat_strlcpy.h
A src/common/compat_getpass.c
A src/common/compat_getopt.h
A src/common/ChangeLog.compat_getopt
D src/common/README.strlcpy
D src/common/my_getopt.h
A src/common/compat_getpass.h
A src/common/README.compat_strlcpy
D src/common/strlcpy.3
A src/common/README.compat_getopt
D src/common/getopt.3
D src/common/README.my_getopt
A src/common/compat_strlcpy.3
A src/common/compat_getopt.3
M src/common/Makefile.am
M src/Makefile.am
_M src/pkcs15init
M src/pkcs15init/pkcs15-oberthur.c
M src/pkcs15init/profile.c
M src/pkcs15init/pkcs15-lib.c
M src/pkcs15init/pkcs15-rutoken.c
A src/pkcs15init/pkcs15init.exports
M src/pkcs15init/pkcs15-gpk.c
M src/pkcs15init/Makefile.am
_M src/scconf
M src/scconf/Makefile.am
M src/scconf/parse.c
A src/scconf/scconf.exports
_M src/libopensc
M src/libopensc/card-rutoken.c
M src/libopensc/compression.c
M src/libopensc/sc.c
M src/libopensc/card-piv.c
M src/libopensc/pkcs15-openpgp.c
M src/libopensc/pkcs15-postecert.c
M src/libopensc/pkcs15-tcos.c
M src/libopensc/opensc-config.in
M src/libopensc/reader-pcsc.c
A src/libopensc/internal-winscard.h
M src/libopensc/ctx.c
A src/libopensc/libopensc.exports
M src/libopensc/pkcs15-piv.c
M src/libopensc/pkcs15-infocamere.c
M src/libopensc/internal.h
M src/libopensc/pkcs15-actalis.c
M src/libopensc/pkcs15-starcert.c
M src/libopensc/card-oberthur.c
M src/libopensc/pkcs15-atrust-acos.c
M src/libopensc/p15card-helper.c
D src/libopensc/part10.h
M src/libopensc/ui.c
M src/libopensc/card-gpk.c
M src/libopensc/pkcs15-wrap.c
M src/libopensc/pkcs15-gemsafeGPK.c
M src/libopensc/log.c
M src/libopensc/pkcs15-esteid.c
M src/libopensc/pkcs15-prkey-rutoken.c
M src/libopensc/log.h
M src/libopensc/Makefile.am
M src/libopensc/reader-openct.c
_M aclocal
M aclocal/Makefile.am
_M win32
M win32/Makefile.am
A win32/versioninfo.rc.in
A win32/ltrc.inc
A configure.ac
_M doc
_M doc/tools
M doc/tools/pkcs15-profile.xml
D doc/changelog.sh
D doc/export-wiki.xsl
_M doc/api
_M doc/api/file
M doc/api/man.xsl
_M doc/api/asn1
_M doc/api/apps
_M doc/api/init
_M doc/api/types
_M doc/api/card
M doc/api/html.xsl
_M doc/api/misc
_M doc/api/util
M doc/Makefile.am
D doc/export-wiki.sh
AM doc/nonpersistent
A doc/nonpersistent/export-wiki.xsl
A doc/nonpersistent/Makefile.am
A doc/nonpersistent/export-wiki.sh
A doc/nonpersistent/svn2cl.xsl
D doc/generate-man.sh
D doc/svn2cl.xsl
M Makefile.am
A svnignore
_M etc
M etc/opensc.conf.in
M etc/Makefile.am
D man
_M solaris
M solaris/Makefile
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@3405 c6295689-39f2-0310-b995-f0e70906c6a9
NUL-byte
- use sizeof(field) instead of SC_PKCS15_MAX_LABEL_SIZE-1 or equivalent as
the 3rd argument of strlcpy()
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@2993 c6295689-39f2-0310-b995-f0e70906c6a9
martin
ludovic.rousseau
aj
alonbl
nils