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- Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size management (Closes ticket #44)

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This commit is contained in:
Paul Bakker
2011-11-25 12:11:43 +00:00
parent b6d5f08051
commit fe3256e54b
4 changed files with 23 additions and 5 deletions
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12
library/bignum.c
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@ -440,7 +440,10 @@ int mpi_read_file( mpi *X, int radix, FILE *fin )
t_uint d;
size_t slen;
char *p;
char s[1024];
/*
* Buffer should have space for (short) label and hexified MPI and '\0'
*/
char s[ 2 * POLARSSL_MPI_MAX_SIZE + 10 ];
memset( s, 0, sizeof( s ) );
if( fgets( s, sizeof( s ) - 1, fin ) == NULL )
@ -465,7 +468,10 @@ int mpi_write_file( const char *p, const mpi *X, int radix, FILE *fout )
{
int ret;
size_t n, slen, plen;
char s[2048];
/*
* Buffer should have space for minus sign, hexified MPI and '\0'
*/
char s[ 2 * POLARSSL_MPI_MAX_SIZE + 2 ];
n = sizeof( s );
memset( s, 0, n );
@ -1867,7 +1873,7 @@ int mpi_gen_prime( mpi *X, size_t nbits, int dh_flag,
size_t k, n;
mpi Y;
if( nbits < 3 || nbits > 4096 )
if( nbits < 3 || nbits > POLARSSL_MPI_MAX_BITS )
return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
mpi_init( &Y );