lcg_scp.c

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/* lcg_scp.c - Secure copy from Grid to User Interface
 * ====================================================================
 * 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 <getopt.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>
//require e2fsprogs-devel
#include <uuid/uuid.h>
//end require
#include <gfal_api.h>
#include "lcg_util.h"
#include "lcg_scp.h"
#include "ss-util.h"
#include "keystore_client.h"

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

extern int errno;
 
/* LCG_SCP */
int lcg_scp(char *src_file,char *dest_file,char *vo,char *conf_file,
                                int insecure,int verbose) {
        
        // Valid character
        const char *accept_vo=" abcdefghilmnopqrstuvzwyxkjABCDEFGHILMNOPQRSTUVZWYXKJ0123456789-";
        const char *accept_lfn=" abcdefghilmnopqrstuvzwyxkjABCDEFGHILMNOPQRSTUVZWYXKJ0123456789.:_/-";
        char *srm_source;
        char *dest_surl;
        char *src_file_new;
        unsigned char hex_key[HEX_KEYSIZE+1];
        unsigned char hex_iv[HEX_IVSIZE+1];
        int nread, fdgfal, cod_ex, len;
        size_t inv;
        
        // 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);
                }
        }
        
        if (src_file==NULL) {
                errno = SS_EINVALLFN;
                return (-1);
        }
        if(dest_file==NULL) {
                errno = SS_EINVALDEST;
                return (-1);
        }
        // Verify length of destination lfn
        if (strlen (src_file) + 1 > LCG_MAXPATHLEN) {
                errno = SS_ESOURCENAMETOOLONG;
                return (-1);
        }
        // Input parameters filter
        inv=0;
        inv = strspn(vo, accept_vo);
        if (inv != strlen(vo) ) {
                errno = SS_EINVALVO;
                return (-1);
        }       
        inv=0;
        inv = strspn(src_file, accept_lfn);
        if (inv != strlen(src_file) ) {
                errno = SS_EINVALLFN;
                return (-1);
        }       
        
        // Enable memory lock for 900 Kb starting at memory pointed by hex_key
        if (lock_memory(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(src_file, &src_file_new) < 0 ) {
                int errno_save = errno;
                errno = errno_save;
                return (-1);
        }
        
        if ( ss_get_key (src_file_new, hex_key, hex_iv) < 0 ) {
                int errno_save = errno;
                free(src_file_new);
                errno = errno_save;
                return (-1);
        }
        // If verbose print Key
        if (verbose) {
                fprintf(stdout, "Key: %s\n", hex_key);
                fprintf(stdout, "IV : %s\n", hex_iv);
        }
        
        /* 
        *    AES Decrypt initialize
        */
        AES_KEY dctx;
        if ( AES_set_encrypt_key(hex_key, 256, &dctx) < 0 ) {
                free(src_file_new);
                errno = SS_EENCINIT;
                return (-1);
        }
        if (verbose) {
                printf("AES Cipher initialized.\n");
        }
        
        // Get the replica SURL
        if ( ss_get_surl(src_file_new,&dest_surl,vo,NULL,insecure) < 0 ) {
                int errno_save = errno;
                free(src_file_new);
                errno = errno_save;
                return (-1);
        }
        srm_source=dest_surl;
        // GFAL
        // Open source file
        if ((fdgfal = gfal_open(srm_source, O_RDONLY, 0644)) < 0) {
                int errno_save = errno;
                free(src_file_new);
                errno = errno_save;
                return (-1);
        }
        if (verbose){
        printf ("open successful, fdgfal = %d\n", fdgfal);
        }
    long long size;
        long long bytesread = 0;
        struct stat st_buf;
        // Verify file size
        cod_ex = gfal_stat(srm_source, &st_buf);
        if ( cod_ex < 0) {
                int errno_save = errno;
        gfal_close(fdgfal);
                free(src_file_new);
                errno = errno_save;
        return (-1);    
        }
        size = st_buf.st_size;
        // END GFAL
        
        // If verbose print file size
        if (verbose) {
                fprintf(stdout, "Source file size is: %lld\n", size);
        }
        // Write of output file
        char *dest_f;
        if (strncmp (dest_file, "file:", 5) == 0) {
                        dest_f=dest_file;
                        dest_f+=5;
                        while ( strncmp (dest_f, "/", 1) == 0 ) {
                                dest_f+=1;
                        }
                        dest_f-=1;
        } else {
                dest_f=dest_file;       
        }
        FILE *fdout;
        if ((fdout = fopen(dest_f, "rb"))) {
                gfal_close(fdgfal);
                free(src_file_new);
                errno = SS_EEXIST;
                return (-1);
        }
        if ( (fdout = fopen(dest_f, "wb")) < 0 ) {
                gfal_close(fdgfal);
                free(src_file_new);
                errno = SS_EACCES;
                return (-1);
        }
        
        // 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) {
                nread=0;
                unsigned char *buffer = (unsigned char *)calloc(1, TRANSFERBLOCKSIZE);
                unsigned char *out = (unsigned char *)calloc(1, TRANSFERBLOCKSIZE);
                // If verbose convert file size in Mbytes and print it to stdout
                if (verbose) {
                        float file_size;
                        if (size >1048576){
                                long long remain = size - bytesread;
                                if (remain > TRANSFERBLOCKSIZE) {
                                        file_size = TRANSFERBLOCKSIZE;
                                        fprintf(stdout, "Reading:         %10.2lf Mbytes from grid:",file_size/1048576  );
                                } else {
                                        file_size = remain;
                                        fprintf(stdout, "Reading:         %10.2lf Mbytes from grid:",file_size/1048576  );
                                }
                        }
                        else {
                                file_size = size;
                                fprintf(stdout, "Reading:         %10.2lf Kbytes from grid:",file_size/1024  ); 
                        }
                }
                // Read source file
                // GFAL
                if ((nread = gfal_read (fdgfal, buffer, TRANSFERBLOCKSIZE)) != TRANSFERBLOCKSIZE) {
                        if (nread < 0) {
                                int errno_save = errno;
                fclose(fdout);
                                gfal_close(fdgfal);
                                free(buffer); free(out); free(ivec); free(src_file_new); free(num);
                                errno = errno_save;
                                return (-1);
                        }
                } // END GFAL
                // If verbose print to stdout Success for incomplete read of block or Complete for last block
                if (verbose) {
                        if(bytesread+nread < size) {
                                fprintf (stdout, "  Success\n");        
                        } else {
                                fprintf (stdout, "  Complete.\n");
                        }
                }
                len = nread;
                //Call decrypt function
                securestorage_AES_ctr(buffer, out, len, &dctx, ivec, ecount_buf, num);
                
                // Clean buffer
                memset(buffer, 0, TRANSFERBLOCKSIZE);
                free(buffer);
                
                if (verbose) {
                        fprintf(stdout, "Attempt to write %d bytes\n", len);    
                }
                /* attempt to write it */
                int nwrite = fwrite(out, 1, len, fdout);
                if (nwrite < 0) {
                        int errno_save = errno;
            fclose(fdout); gfal_close(fdgfal);
                        free(out); free(ivec); free(src_file_new); free(num);
                        errno = errno_save;
                        return (-1);
                }
                // Clean out
                memset(out, 0, len);
                free(out);
                bytesread += nread;
        } // End While
        
        // Close output file
        fclose(fdout);
        // GFAL
        if ((cod_ex = gfal_close (fdgfal)) < 0) {
                int errno_save = errno;
        free(ivec); free(src_file_new); free(num);
        errno = errno_save;
        return (-1);
    } // END GFAL
    if (verbose) {
        printf ("Source file close successful\n");
    }
    // Clear variables
    memset(hex_key, 0, HEX_KEYSIZE);
        memset(hex_iv, 0, HEX_IVSIZE);
        memset(ivec, 0, HEX_IVSIZE);
        memset(dctx.rd_key, 0, 60); 
    free(ivec); free(src_file_new); free(num);
        
    // Unlock memory
        if (munlockall() < 0 ) {
                int errno_save = errno;
                fprintf(stderr, "%s\n", securestorage_error(errno_save));
        }
        
        return 0;
}

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