Store nbits of the value p points to in a and mark a as an opaque value (i.e. an value that can't be used for any math calculation and is only used to store an arbitrary bit pattern in a).
WARNING: Never use an opaque MPI for actual math operations. The only valid functions are gcry_mpi_get_opaque and gcry_mpi_release. Use gcry_mpi_scan to convert a string of arbitrary bytes into an MPI.
Return a pointer to an opaque value stored in a and return its size in nbits. Note that the returned pointer is still owned by a and that the function should never be used for an non-opaque MPI.
Set the flag for the MPI a. Currently only the flag
GCRYMPI_FLAG_SECUREis allowed to convert a into an MPI stored in "secure memory".
Clear flag for the multi-precision-integers a. Note that this function is currently useless as no flags are allowed.
Return true when the flag is set for a.
Set the multi-precision-integers w to a random value of nbits, using random data quality of level level. In case nbits is not a multiple of a byte, nbits is rounded up to the next byte boundary. When using a level of
GCRY_WEAK_RANDOMthis function makes use of