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- Extra sanity check for input added

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This commit is contained in:
Paul Bakker 2012-09-16 15:07:49 +00:00
parent 0c93d126bc
commit b5b20f19e7
1 changed files with 6 additions and 0 deletions
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6
library/dhm.c
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@ -128,6 +128,9 @@ int dhm_make_params( dhm_context *ctx, int x_size,
size_t n1, n2, n3; size_t n1, n2, n3;
unsigned char *p; unsigned char *p;
if( mpi_cmp_int( &ctx->P, 0 ) == 0 )
return( POLARSSL_ERR_DHM_BAD_INPUT_DATA );
/* /*
* Generate X as large as possible ( < P ) * Generate X as large as possible ( < P )
*/ */
@ -211,6 +214,9 @@ int dhm_make_public( dhm_context *ctx, int x_size,
if( ctx == NULL || olen < 1 || olen > ctx->len ) if( ctx == NULL || olen < 1 || olen > ctx->len )
return( POLARSSL_ERR_DHM_BAD_INPUT_DATA ); return( POLARSSL_ERR_DHM_BAD_INPUT_DATA );
if( mpi_cmp_int( &ctx->P, 0 ) == 0 )
return( POLARSSL_ERR_DHM_BAD_INPUT_DATA );
/* /*
* generate X and calculate GX = G^X mod P * generate X and calculate GX = G^X mod P
*/ */