Changing expired password with OCIPasswordChange

Question

I know that ODP.NET has a option to open a connection with a new password when the old one has expired. I'm using System.Data.OracleClient from .Net instead of ODP because I'm using the Instant Client, which does not seem to work with ODP. Can somebody tell me how to call OCIPasswordChange?

Answer 1

Hi,
OCIPasswordChange is an OCI call. You'd have to write a complete OCI application in C to be able to use that, and OCI coding isnt for the faint of heart.
I do have a complete OCI sample that does it though.. here you go.
Cheers,
Greg
This sample demonstrates the use of OCIPasswordChange once the
password has expired, which requires setting the session into
the service context. Tested with oci 8.1.5, vc++ 6.0 sp3.
first create the user with expired password:
SQL> create user testuser identified by oldpass password expire;
SQL> grant create session to testuser;
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <oci.h>
static OCIEnv          *p_env;
static OCIError          *p_err;
static OCIServer *p_srv;
static OCISession *p_ses;
static OCISvcCtx     *p_svc;
void main()
     int          rc;
     char     errbuf[100];
     int          errcode;
     // Step 1: Initialize OCI
     rc = OCIInitialize((ub4) OCI_DEFAULT, (dvoid *)0,
          (dvoid * (*)(dvoid *, size_t)) 0,
          (dvoid * (*)(dvoid *, dvoid *, size_t))0,
          (void (*)(dvoid *, dvoid *)) 0 );
     // Step 2: Initialize the OCI evironment
     rc = OCIEnvInit( (OCIEnv **) &p_env, OCI_DEFAULT, (size_t) 0, (dvoid **) 0 );
     // Step 3: Initialize the OCI handles
     rc = OCIHandleAlloc( (dvoid *) p_env, (dvoid **) &p_err, OCI_HTYPE_ERROR,
          (size_t) 0, (dvoid **) 0);
     rc = OCIHandleAlloc( (dvoid *) p_env, (dvoid **) &p_svc, OCI_HTYPE_SVCCTX,
          (size_t) 0, (dvoid **) 0);
     rc = OCIHandleAlloc( (dvoid *) p_env, (dvoid **) &p_srv, OCI_HTYPE_SERVER,
          (size_t) 0, (dvoid **) 0);
     rc = OCIHandleAlloc((dvoid *) p_env, (dvoid **)&p_ses, (ub4) OCI_HTYPE_SESSION,
          (size_t) 0, (dvoid **) 0);
     // Step 4: Connect using a mutli-session connect
     rc = OCIServerAttach( p_srv, p_err,
          (text *)"local", 5, 0);
     // Create a server context
     rc = OCIAttrSet( (dvoid *) p_svc, OCI_HTYPE_SVCCTX,
          (dvoid *)p_srv, (ub4) 0,
          (ub4) OCI_ATTR_SERVER, (OCIError *) p_err);
     // Create a session context
     rc = OCIAttrSet((dvoid *) p_ses, (ub4) OCI_HTYPE_SESSION,
          (dvoid *) "testuser", (ub4) 8,
          (ub4) OCI_ATTR_USERNAME, p_err);
     rc = OCIAttrSet((dvoid *) p_ses, (ub4) OCI_HTYPE_SESSION,
          (dvoid *) "oldpass", (ub4) 7,
          (ub4) OCI_ATTR_PASSWORD, p_err);
     rc = OCIAttrSet((dvoid *) p_svc, (ub4) OCI_HTYPE_SVCCTX,
          (dvoid *) p_ses, (ub4) 0,
          (ub4) OCI_ATTR_SESSION, p_err);
     // Open the session on the server
     rc = OCISessionBegin ( p_svc, p_err, p_ses, OCI_CRED_RDBMS,
          (ub4) OCI_DEFAULT);
     // This is a generic error checking routine
     if (rc != 0)
          OCIErrorGet((dvoid *)p_err, (ub4) 1, (text *) NULL, &errcode,
               (text*)errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR);
          printf("Error - %.*s\n", 512, errbuf);
          // If the error is a 28001, change the password.
          if(errcode==28001)
               // You need to set the Session into the service context
               // before you can call OCIPasswordChange(), and you also need
               // to allocate both the session and service context handles
               // before hand. Then you can call OCIPasswordChange.
               rc = OCIAttrSet((dvoid *)p_svc, OCI_HTYPE_SVCCTX,
                    (dvoid *)p_ses,0,OCI_ATTR_SESSION, p_err);
               rc = OCIPasswordChange(p_svc, p_err, "testuser",8,
                    "oldpass",7, "newpass",8, OCI_DEFAULT);
               if(rc != 0) printf("Password change failed.\n");
               else printf("Password successfully changed.\n");
     // Step 10: Disconnect from the server and free the
     rc = OCIServerDetach( p_srv, p_err, OCI_DEFAULT );
     rc = OCIHandleFree((dvoid *) p_srv, OCI_HTYPE_SERVER);
     rc = OCIHandleFree((dvoid *) p_svc, OCI_HTYPE_SVCCTX);
     rc = OCIHandleFree((dvoid *) p_err, OCI_HTYPE_ERROR);
     printf("Disconnected.\n\n");
     return;
}