Problem - Kevin Tafuro

nbytes
Number of bytes of entropy that should be written into the output buffer. You
must be sure that the output buffer is sufficiently large to hold the requested
data.
err
If any error occurs, an error code will be stored in this argument. A value of 0
indicates that no error occurred; otherwise, one of the RERR_* constants defined
in egads.h will be returned. NULL may be not be specified here.
The function PRNG_output( ) allows you to get byte strings of cryptographically random
data. Its signature nearly matches that of spc_rand( ) from Recipe 11.2:
void PRNG_output(prng_ctx *ctx, char *buf, int64 nbytes);
This function has the following arguments:
ctx
PRNG context object that has been initialized.
buf
Buffer into which the entropy data will be placed.
nbytes
Number of bytes of random data that should be written into the output buffer.
You must be sure that the output buffer is sufficiently large to hold the requested
data.
The function egads_destroy( ) resets a PRNG context object. Before the memory for
the context object is freed or goes out of scope (because it is statically allocated on
the stack), egads_destroy( ) must be called on a successfully initialized context
object. This ensures that the connection to the EGADS server or service is broken,
and that any other memory or state maintained by EGADS that is associated with the
context object is cleaned up.
void egads_destroy(prngctx_t *ctx);
This ctx argument is the successfully initialized PRNG context that is to be
destroyed. It is the caller’s responsibility to free any memory used to allocate the
object
The rest of the EGADS API allows you to retrieve pseudo-random values of particular
data types. All functions in this API take a final argument that, on completion of
the call, contains the success or failure status. On failure, the error argument contains
an integer error code. On success, it will be 0.
void egads_randlong(prngctx_t *ctx, long *out, int *error);
void egads_randulong(prngctx_t *ctx, unsigned long *out, int *error);
void egads_randint(prngctx_t *ctx, int *out, int *error);
void egads_randuint(prngctx_t *ctx, unsigned int *out, int *error);
void egads_randrange(prngctx_t *ctx, int *out, int min, int max, int *error);
Getting Entropy or Pseudo-Randomness Using EGADS | 601
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