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Add checks for private parameter in mbedtls_ecdsa_sign()

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Darryl Green 2017-11-17 17:09:17 +00:00
parent 888fedea06
commit c64a48bec7
1 changed files with 4 additions and 0 deletions
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4
library/ecdsa.c
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@ -81,6 +81,10 @@ int mbedtls_ecdsa_sign( mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s,
if( grp->N.p == NULL ) if( grp->N.p == NULL )
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA ); return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
/* Make sure d is in range 1..n-1 */
if( mbedtls_mpi_cmp_int( d, 1 ) < 0 || mbedtls_mpi_cmp_mpi( d, &grp->N ) >= 0 )
return( MBEDTLS_ERR_ECP_INVALID_KEY );
mbedtls_ecp_point_init( &R ); mbedtls_ecp_point_init( &R );
mbedtls_mpi_init( &k ); mbedtls_mpi_init( &e ); mbedtls_mpi_init( &t ); mbedtls_mpi_init( &k ); mbedtls_mpi_init( &e ); mbedtls_mpi_init( &t );