credentials_iterator.c   [plain text]

/* $Copyright:
 *
 * Copyright 2004 by the Massachusetts Institute of Technology.
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 * this software and its documentation for any purpose and without fee is
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 * used in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.  Furthermore if you
 * modify this software you must label your software as modified software
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 */

/* credentials_iterator.c */

#include <stdlib.h>
#include <stdio.h>
#include <CredentialsCache.h>
#include "credentials_iterator.h"
#include "msg.h"
#include "msg_headers.h"


cc_int32
cc_int_credentials_iterator_new( cc_credentials_iterator_t * piter, 
                                 cc_handle ctx,
                                 cc_handle ccache,
                                 cc_handle handle )
{
    cc_int_credentials_iterator_t iter;

    if ( piter == NULL )
        return ccErrBadParam;

    iter = (cc_int_credentials_iterator_t) malloc( sizeof(cc_int_credentials_iterator_d) );
    if ( iter == NULL )
        return ccErrNoMem;

    iter->functions = (cc_credentials_iterator_f*)malloc(sizeof(cc_credentials_iterator_f));
    if ( iter->functions == NULL ) {
        free(iter);
        return ccErrNoMem;
    }

    iter->functions->release = cc_int_credentials_iterator_release;
    iter->functions->next = cc_int_credentials_iterator_next;
    iter->magic = CC_CREDS_ITER_MAGIC;
    iter->ctx = ctx;
    iter->ccache = ccache;
    iter->handle = handle;

    *piter = (cc_credentials_iterator_t) iter;
    return ccNoError;
}

cc_int32
cc_int_credentials_iterator_release( cc_credentials_iterator_t iter )
{
    cc_int_credentials_iterator_t int_iter;
    cc_msg_t        *request;
    ccmsg_creds_iterator_release_t *request_header;
    cc_msg_t        *response;
    cc_int32 code;

    if ( iter == NULL )
        return ccErrBadParam;

    int_iter = (cc_int_credentials_iterator_t) iter;

    if ( int_iter->magic != CC_CREDS_ITER_MAGIC )
        return ccErrInvalidCredentialsIterator;

    request_header = (ccmsg_creds_iterator_release_t*)malloc(sizeof(ccmsg_creds_iterator_release_t));
    if (request_header == NULL)
        return ccErrNoMem;
    request_header->ctx = int_iter->ctx;
    request_header->ccache = int_iter->ccache;
    request_header->iterator = int_iter->handle;
    code = cci_msg_new(ccmsg_CREDS_ITERATOR_RELEASE, &request);
    if (code != ccNoError) {
        free(request_header);
        return code;
    }

    code = cci_msg_add_header(request, request_header, sizeof(ccmsg_creds_iterator_release_t));

    code = cci_perform_rpc(request, &response);

    if (response->type == ccmsg_NACK) {
        ccmsg_nack_t * nack_header = (ccmsg_nack_t *)response->header;
        code = nack_header->err_code;
    } else if (response->type == ccmsg_ACK) {
        code = ccNoError;
    } else {
        code = ccErrBadInternalMessage;
    }
    cci_msg_destroy(request);
    cci_msg_destroy(response);

    free(int_iter->functions);
    free(int_iter);
    return ccNoError;
}

cc_int32
cc_int_credentials_iterator_next( cc_credentials_iterator_t iter,
                                  cc_credentials_t * credentials )
{
    cc_int_credentials_iterator_t int_iter;
    cc_msg_t        *request;
    ccmsg_creds_iterator_next_t *request_header;
    cc_msg_t        *response;
    cc_int32 code;

    if ( credentials == NULL )
        return ccErrBadParam;

    int_iter = (cc_int_credentials_iterator_t)iter;

    if ( int_iter->magic != CC_CREDS_ITER_MAGIC )
        return ccErrInvalidCredentialsIterator;

    request_header = (ccmsg_creds_iterator_next_t*)malloc(sizeof(ccmsg_creds_iterator_next_t));
    if (request_header == NULL)
        return ccErrNoMem;
    request_header->ctx = int_iter->ctx;
    request_header->ccache = int_iter->ccache;
    request_header->iterator = int_iter->handle;

    code = cci_msg_new(ccmsg_CREDS_ITERATOR_NEXT, &request);
    if (code != ccNoError) {
        free(request_header);
        return code;
    }

    code = cci_msg_add_header(request, request_header, sizeof(ccmsg_creds_iterator_next_t));

    code = cci_perform_rpc(request, &response);

    if (response->type == ccmsg_NACK) {
        ccmsg_nack_t * nack_header = (ccmsg_nack_t *)response->header;
        code = nack_header->err_code;
    } else if (response->type == ccmsg_ACK) {
        char * blob;
        ccmsg_creds_iterator_next_resp_t * response_header = (ccmsg_creds_iterator_next_resp_t*)response->header;
        code = cci_msg_retrieve_blob(response, response_header->creds_offset, response_header->creds_len, &blob);
        code = cc_credentials_new(credentials, response_header->version,
                                  int_iter->ctx, int_iter->ccache, response_header->creds_handle, 
                                  blob, response_header->creds_len);
        free(blob);
    } else {
        code = ccErrBadInternalMessage;
    }
    cci_msg_destroy(request);
    cci_msg_destroy(response);
    return code;
}