lcg_scr.c

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/* lcg_scr.c - Secure copy User Interface to Grid
 * ====================================================================
 * Copyright (c) Giordano Scuderi, Unico SRL.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by Giordano Scuderi
 *    for Unico SRL"
 *
 * 4. The names "Secure Storage" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    gscuderi@unicosrl.it.
 *
 * 5. Products derived from this software may not be called "Secure Storage"
 *    nor may "Secure Storage" appear in their names without prior written
 *    permission of Giordano Scuderi (Unico SRL).
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by Giordano Scuderi
 *    for Unico SRL"
 *
 * THIS SOFTWARE IS PROVIDED BY UNICO SRL ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL UNICO SRL OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 * 
 */

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#if defined(_WIN32)
#include <io.h>
#else
#include <unistd.h>
#endif
#include <sys/mman.h>
#include <dlfcn.h>
#include <gfal_api.h>
#include "lcg_util.h"
#include "ss-util.h"
#include "keystore_client.h"
#include "lcg_scr.h"

#ifdef __cplusplus
} /* closing brace for extern "C" */
#endif           

extern int errno;

/*
 * LCG_SCR Function 
 *
 */
int lcg_scr(char *src_file,char *dest_file,char *guid,char *lfn,char *vo,
                char *conf_file,int insecure,int verbose,char *actual_gid) {
        
        //VARIABLE DEFINITION
        unsigned char hex_key[HEX_KEYSIZE+1];
        unsigned char hex_iv[HEX_IVSIZE+1];
        AES_KEY ectx;
        int cod_ex;
        unsigned long nread, len;
        size_t inv;
        int fdgfal=-1;
        int ret=-1;
        char *dest_surl;
        char *lfn_new;
        // Valid character
        const char *accept_host=" abcdefghilmnopqrstuvzwyxkjABCDEFGHILMNOPQRSTUVZWYXKJ0123456789.-";
        const char *accept_vo=" abcdefghilmnopqrstuvzwyxkjABCDEFGHILMNOPQRSTUVZWYXKJ0123456789-";
        const char *accept_lfn=" abcdefghilmnopqrstuvzwyxkjABCDEFGHILMNOPQRSTUVZWYXKJ0123456789.:_/-";
        
        memset(hex_key,'\0',HEX_KEYSIZE+1);
        memset(hex_iv,'\0',HEX_IVSIZE+1);
        
        // Verify if lfn was specified
        if (lfn == NULL) {
                errno = SS_EINVALLFN;
                return (-1);    
        }
        // Verify length of destination lfn
        if (strlen(lfn) + 1 > LCG_MAXPATHLEN) {
                errno = SS_EDESTNAMETOOLONG;
                return (-1);
        }
        // Verify if --vo flag was specified or exist Environment variable LCG_GFAL_VO
        if (vo == NULL){
                vo = getenv(VO);
                if (!vo) {
                        errno = SS_EINVALVO;
                        return (-1);
                }
        }
        //Verify if Destination SE was specified
        if (dest_file == NULL){
                char *storageelementdest;
                sprintf(storageelementdest, "VO_%s_DEFAULT_SE",vo);
                dest_file = getenv(storageelementdest);
                if (!dest_file) {
                        errno = SS_EINVALSE;
                        return (-1);
                }
        }
        
        if (guid!=NULL) {
                if (strlen(guid)!=36 ) {
                        errno = SS_EINVALGUID;
                        return (-1);
                }
        }
        
        // Input parameters filter
        inv=0;
        inv = strspn(dest_file, accept_host);
        if (inv != strlen(dest_file) ) {
                errno = SS_EINVALSE;
                return (-1);
        }
        inv=0;
        inv = strspn(vo, accept_vo);
        if (inv != strlen(vo) ) {
                errno = SS_EINVALVO;
                return (-1);
        }       
        inv=0;
        inv = strspn(lfn, accept_lfn);
        if (inv != strlen(lfn) ) {
                errno = SS_EINVALLFN;
                return (-1);
        }
        
        // Enable memory lock starting at memory pointed by hex_key
        if (lock_memory((char*) hex_key,900000) < 0 ) {
                int errno_save = errno;
                fprintf(stderr, "%s\n", securestorage_error(errno_save));
                fprintf(stderr,"WARNING - Using unsecure memory!\n");
        }
        
        // Add LFC_HOME to LFN
        if ( ss_get_lfchome(lfn, &lfn_new) < 0 ) {
                return (-1);                    
        }
        
        int existence = ss_check_lfn ( lfn_new, vo);
        int errno_save = errno;
        if ( existence < 0 ) {
                free(lfn_new);
                errno = errno_save;
                return (-1);
        } else if ( existence == 1 ) {
                free(lfn_new);
                errno = SS_EEXIST;
                return (-1);
        }
        
        // Generate random KEY and IV
        if ( ss_rand (HEX_KEYSIZE, hex_key) < 0 ) {
                int errno_save = errno;
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        if ( ss_rand (HEX_IVSIZE, hex_iv ) < 0 ) {
                int errno_save = errno;
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        // Set encrypt key
        if ( AES_set_encrypt_key(hex_key, 256, &ectx) < 0 ) {
                free(lfn_new);
                errno = SS_EENCINIT;
                return (-1);
        }
        if (verbose) {
                printf("AES Cipher initialized.\n");
        }
        
        //SAVE KEY AND IV TO KEYSTORE
        if ( ss_send_key (lfn_new, hex_key, hex_iv) < 0 ) {
                int errno_save = errno;
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        
        // Open source file and verify if it exist
        char *src_file_path;
        if (strncmp (src_file, "file:", 5) == 0) {
                        src_file_path = src_file;
                        src_file_path+=5;
                        while ( strncmp (src_file_path, "/", 1) == 0 ) {
                                src_file_path+=1;
                        }
                        src_file_path-=1;
        } else {
                src_file_path = src_file;
        }
        int fd = open(src_file_path, O_RDONLY);
        if (fd < 0) {
                int errno_save = errno;
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        // Open source file and verify file size
        long long size, bytesread = 0;
        struct stat st_buf;
        int fdstat = fstat(fd, &st_buf);
        if (fdstat <0) {
                int errno_save = errno;
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        size = st_buf.st_size;
        close(fd);

        // Reopen source file and verify if it exist
        FILE *fdin = fopen(src_file_path, "rb");
        if (fdin == NULL) {
                int errno_save = errno;
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                free(lfn_new);
                errno = errno_save;
                return (-1);
        }
        
        // Generate SURL
        if ( ss_generate_surl( &dest_surl, dest_file, vo, guid) < 0 ) {
                int errno_save = errno;
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                fclose(fdin);
                free(lfn_new);
                errno = errno_save;
                return (-1);    
        }
        
        // Try opening remote file in write mode
        fdgfal = gfal_open(dest_surl, O_WRONLY|O_CREAT, 0644);
        if (fdgfal < 0) {
                int errno_save = errno;
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                fclose(fdin);
                free(lfn_new); free(dest_surl);
                errno = errno_save;
                return (-1);
        } else if (verbose) {
                        fprintf(stdout, "File %s successfully opened\n", dest_surl); 
        }
        
        // Read and Encrypt Data
        unsigned char ecount_buf[AES_BLOCK_SIZE];
        bzero (ecount_buf, AES_BLOCK_SIZE);
        unsigned int *num = calloc (1, sizeof(int));
        unsigned char *ivec = (unsigned char *)calloc(1, AES_BLOCK_SIZE);
        memcpy(ivec, hex_iv, AES_BLOCK_SIZE);
        
        while (bytesread < size) {
                // Clean variables
                unsigned char *buffer = (unsigned char *)calloc(1, TRANSFERBLOCKSIZE);
                unsigned char *out = (unsigned char *)calloc(1, TRANSFERBLOCKSIZE);
                nread=0;
                // Read source file
                nread =  fread(buffer, 1, TRANSFERBLOCKSIZE, fdin);
                // Delete KEY and IV and clean environment if an error occured
                if (nread < 0) {
                        int errno_save = errno;
                        // DELETE KEY AND IV FROM KEYSTORE
                        if ( ss_delete_key(lfn_new) < 0 ) {
                                int errno_tmp = errno;
                                fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                        }
                        fclose(fdin);
                        gfal_close(fdgfal);
                        free(buffer); free(out); free(ivec); free(lfn_new); free(num); free(dest_surl);
                        errno = errno_save;
                        return (-1);
                } else if (verbose) {
                        fprintf(stdout, "Read %ld byte\n",nread);
                }
                len=nread;
                //Call Encrypt function
                securestorage_AES_ctr(buffer, out, len, &ectx, ivec, ecount_buf, num);
                
                memset(buffer, 0, TRANSFERBLOCKSIZE);
                free(buffer);
                // If verbose convert file size in Mbytes and print it to stdout
                if(verbose) {
                        float file_size = len;
                        if (file_size > 100000) {
                                fprintf(stdout, "Writing: %10.2lf Mbytes to grid:",file_size/1048576);
                        }
                        else {
                                fprintf(stdout, "Writing: %10.2lf Kbytes to grid:",file_size/1024);
                        }
                }
                /* attempt to write remote file */
                if ((cod_ex = gfal_write(fdgfal, out, nread)) < 0 ) {
                        int errno_save = errno;
                        // DELETE KEY AND IV FROM KEYSTORE
                        if ( ss_delete_key(lfn_new) < 0 ) {
                                int errno_tmp = errno;
                                fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                        }
                        fclose(fdin); free(out); free(ivec); free(num);
                        gfal_close(fdgfal);
                        free(lfn_new); free(dest_surl);
                        errno = errno_save;
                        return (-1); 
                } else if (verbose) {
                // If verbose print to stdout Success for incomplete write of block or Complete for last block
                        if(bytesread+nread < size) {
                                fprintf (stdout, "  Success\n");
                        } else {
                                fprintf (stdout, "  Complete.\n");
                        }
                }
                bytesread += nread;
                memset(out, 0, nread);
                free(out);
        } // End While
        
        // -------------------------------------------------------------------------
        // Clean
        memset(hex_key, 0, HEX_KEYSIZE);
        memset(hex_iv, 0, HEX_IVSIZE);
        memset(ivec, 0, HEX_IVSIZE);
        memset(ectx.rd_key,0,60);
        free(ivec); free(num);
        
        // Unlock memory
        if (munlockall() < 0 ) {
                int errno_save = errno;
                fprintf(stderr, "%s\n", securestorage_error(errno_save));
        }
        
        fclose(fdin);
        // Close remote file
        if (gfal_close(fdgfal) < 0) {
                int errno_save = errno;
                // Delete orphaned file from storage element
                int aflag=0;
                lcg_delt (dest_surl, aflag, dest_file, vo, conf_file, insecure, verbose, 0);
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                free(lfn_new); free(dest_surl);
                errno = errno_save;
                return (-1);
        }
        // Register file into catalog
        ret = lcg_rf (dest_surl, guid, lfn_new, vo, conf_file, insecure, verbose, actual_gid);
        if (ret < 0 ) {
                int errno_save = errno;
                // Delete orphaned file from storage element
                int aflag=0;
                lcg_delt (dest_surl, aflag, dest_file, vo, conf_file, insecure, verbose, 0);
                // DELETE KEY AND IV FROM KEYSTORE
                if ( ss_delete_key(lfn_new) < 0 ) {
                        int errno_tmp = errno;
                        fprintf(stderr, "%s\n", securestorage_error(errno_tmp));
                }
                free(lfn_new); free(dest_surl);
                errno = errno_save;
                return (-1);
        } // End register file into catalog
        
        // Print GUID
        if (!actual_gid)
                fprintf (stdout, "guid:%s\n", actual_gid);
        free(lfn_new); free(dest_surl);
        return 0;
}

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