diff options
Diffstat (limited to 'mpi/mpiutil.c')
| -rw-r--r-- | mpi/mpiutil.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/mpi/mpiutil.c b/mpi/mpiutil.c index cbbe10d25..62cb882d6 100644 --- a/mpi/mpiutil.c +++ b/mpi/mpiutil.c @@ -103,6 +103,12 @@ mpi_alloc_secure( unsigned nlimbs ) } +#if 0 +static void *unused_limbs_5; +static void *unused_limbs_32; +static void *unused_limbs_64; +#endif + mpi_ptr_t #ifdef M_DEBUG mpi_debug_alloc_limb_space( unsigned nlimbs, int secure, const char *info ) @@ -111,14 +117,37 @@ mpi_alloc_limb_space( unsigned nlimbs, int secure ) #endif { size_t len = nlimbs * sizeof(mpi_limb_t); + mpi_ptr_t p; if( DBG_MEMORY ) log_debug("mpi_alloc_limb_space(%u)\n", (unsigned)len*8 ); + #if 0 + if( !secure ) { + if( nlimbs == 5 && unused_limbs_5 ) { /* DSA 160 bits */ + p = unused_limbs_5; + unused_limbs_5 = *p; + return p; + } + else if( nlimbs == 32 && unused_limbs_32 ) { /* DSA 1024 bits */ + p = unused_limbs_32; + unused_limbs_32 = *p; + return p; + } + else if( nlimbs == 64 && unused_limbs_64 ) { /* DSA 2*1024 bits */ + p = unused_limbs_64; + unused_limbs_64 = *p; + return p; + } + } + #endif + #ifdef M_DEBUG - return secure? m_debug_alloc_secure(len, info):m_debug_alloc( len, info ); + p = secure? m_debug_alloc_secure(len, info):m_debug_alloc( len, info ); #else - return secure? m_alloc_secure( len ):m_alloc( len ); + p = secure? m_alloc_secure( len ):m_alloc( len ); #endif + + return p; } void @@ -132,6 +161,31 @@ mpi_free_limb_space( mpi_ptr_t a ) return; if( DBG_MEMORY ) log_debug("mpi_free_limb_space of size %lu\n", (ulong)m_size(a)*8 ); + + #if 0 + if( !m_is_secure(a) ) { + size_t nlimbs = m_size(a) / 4 ; + void *p = a; + + if( nlimbs == 5 ) { /* DSA 160 bits */ + *a = unused_limbs_5; + unused_limbs_5 = a; + return; + } + else if( nlimbs == 32 ) { /* DSA 1024 bits */ + *a = unused_limbs_32; + unused_limbs_32 = a; + return; + } + else if( nlimbs == 64 ) { /* DSA 2*1024 bits */ + *a = unused_limbs_64; + unused_limbs_64 = a; + return; + } + } + #endif + + m_free(a); } |