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* mpicoder.c (mpi_set_buffer): Cast all left operands of a shift

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to a larger type so that 16 bit CPUs don't suffer from an
overflow.  Suggested by TOGAWA Satoshi.
This commit is contained in:
Werner Koch 2002-09-10 08:28:03 +00:00
parent 075f862277
commit d6a87e6b28
2 changed files with 13 additions and 7 deletions
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6
mpi/ChangeLog
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@ -1,3 +1,9 @@
2002-09-03 Werner Koch <wk@gnupg.org>
* mpicoder.c (mpi_set_buffer): Cast all left operands of a shift
to a larger type so that 16 bit CPUs don't suffer from an
overflow. Suggested by TOGAWA Satoshi.
2002-08-24 David Shaw <dshaw@jabberwocky.com> 2002-08-24 David Shaw <dshaw@jabberwocky.com>
* longlong.h: Remove space between \ and newline. gcc is * longlong.h: Remove space between \ and newline. gcc is

14
mpi/mpicoder.c
View File

@ -405,10 +405,10 @@ mpi_set_buffer( MPI a, const byte *buffer, unsigned nbytes, int sign )
for(i=0, p = buffer+nbytes-1; p >= buffer+BYTES_PER_MPI_LIMB; ) { for(i=0, p = buffer+nbytes-1; p >= buffer+BYTES_PER_MPI_LIMB; ) {
#if BYTES_PER_MPI_LIMB == 4 #if BYTES_PER_MPI_LIMB == 4
alimb = *p-- ; alimb = (mpi_limb_t)*p-- ;
alimb |= *p-- << 8 ; alimb |= (mpi_limb_t)*p-- << 8 ;
alimb |= *p-- << 16 ; alimb |= (mpi_limb_t)*p-- << 16 ;
alimb |= *p-- << 24 ; alimb |= (mpi_limb_t)*p-- << 24 ;
#elif BYTES_PER_MPI_LIMB == 8 #elif BYTES_PER_MPI_LIMB == 8
alimb = (mpi_limb_t)*p-- ; alimb = (mpi_limb_t)*p-- ;
alimb |= (mpi_limb_t)*p-- << 8 ; alimb |= (mpi_limb_t)*p-- << 8 ;
@ -426,9 +426,9 @@ mpi_set_buffer( MPI a, const byte *buffer, unsigned nbytes, int sign )
if( p >= buffer ) { if( p >= buffer ) {
#if BYTES_PER_MPI_LIMB == 4 #if BYTES_PER_MPI_LIMB == 4
alimb = *p-- ; alimb = *p-- ;
if( p >= buffer ) alimb |= *p-- << 8 ; if( p >= buffer ) alimb |= (mpi_limb_t)*p-- << 8 ;
if( p >= buffer ) alimb |= *p-- << 16 ; if( p >= buffer ) alimb |= (mpi_limb_t)*p-- << 16 ;
if( p >= buffer ) alimb |= *p-- << 24 ; if( p >= buffer ) alimb |= (mpi_limb_t)*p-- << 24 ;
#elif BYTES_PER_MPI_LIMB == 8 #elif BYTES_PER_MPI_LIMB == 8
alimb = (mpi_limb_t)*p-- ; alimb = (mpi_limb_t)*p-- ;
if( p >= buffer ) alimb |= (mpi_limb_t)*p-- << 8 ; if( p >= buffer ) alimb |= (mpi_limb_t)*p-- << 8 ;