diff options
| author | David Kalnischkies <david@kalnischkies.de> | 2016-08-31 10:11:07 +0200 |
|---|---|---|
| committer | David Kalnischkies <david@kalnischkies.de> | 2016-09-01 16:13:14 +0200 |
| commit | 644478e8db56f305601c3628a74e53de048b28c8 (patch) | |
| tree | edcd2bfc85f7fdcdef458b8c3b5ad729d4d6481a /apt-pkg/contrib/hashes.h | |
| parent | 0343b48e06fb990ee15a020bc6716b1a5a984e14 (diff) | |
try not to call memcpy with length 0 in hash calculations
memcpy is marked as nonnull for its input, but ignores the input anyhow
if the declared length is zero. Our SHA2 implementations do this as
well, it was "just" MD5 and SHA1 missing, so we add the length check
here as well as along the callstack as it is really pointless to do all
these method calls for "nothing".
Reported-By: gcc -fsanitize=undefined
Diffstat (limited to 'apt-pkg/contrib/hashes.h')
| -rw-r--r-- | apt-pkg/contrib/hashes.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/apt-pkg/contrib/hashes.h b/apt-pkg/contrib/hashes.h index 9bfc32c54..1fe0afc00 100644 --- a/apt-pkg/contrib/hashes.h +++ b/apt-pkg/contrib/hashes.h @@ -195,11 +195,11 @@ class Hashes static const int UntilEOF = 0; - bool Add(const unsigned char * const Data, unsigned long long const Size); - APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") bool Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes); - inline bool Add(const char * const Data) + bool Add(const unsigned char * const Data, unsigned long long const Size) APT_NONNULL(2); + APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") bool Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes) APT_NONNULL(2); + inline bool Add(const char * const Data) APT_NONNULL(2) {return Add((unsigned char const * const)Data,strlen(Data));}; - inline bool Add(const unsigned char * const Beg,const unsigned char * const End) + inline bool Add(const unsigned char * const Beg,const unsigned char * const End) APT_NONNULL(2,3) {return Add(Beg,End-Beg);}; enum SupportedHashes { MD5SUM = (1 << 0), SHA1SUM = (1 << 1), SHA256SUM = (1 << 2), |