#include <sasl/sasl.h> int sasl_canon_user_t(sasl_conn_t *conn, void *context, const char *user, unsigned ulen, unsigned flags, const char *user_realm, char *out_user, unsigned out_umax, unsigned *out_ulen)
sasl_canon_user_t Is the callback for an application-supplied user canonicalization function. This function is subject to the requirements that all user canonicalization functions are: It must copy the result into the output buffers, but the output buffers and the input buffers may be the same.
context context from the callback record
user and ulen Un-canonicalized username (and length)
flags Either SASL_CU_AUTHID (indicating the authentication ID is being canonicalized) or SASL_CU_AUTHZID (indicating the authorization ID is to be canonicalized) or a bitwise OR of the the two.
user_realm Realm of authentication.
out_user and out_umax and out_ulen The output buffer, max length, and actual length for the username.