Exemplo n.º 1
0
int reverse_test()
{
    char wbuf[1024];
    char rbuf[1024];

    printf("Reverse write test...\n");
    for(int pass=1;pass<=2;pass++){

	AFFILE *af = open_testfile("test_reverse",pass==1);
	for(int i=MAX_FMTS-1;i>=0;i--){
	    sprintf(wbuf,fmt,i);
	    af_seek(af,strlen(wbuf)*i,SEEK_SET);
	    if(pass==1){
		if(af_write(af,(unsigned char *)wbuf,strlen(wbuf))!=(int)strlen(wbuf)){
		    err(1,"Attempt to write buffer %d failed\n",i);
		}
	    }
	    if(pass==2){
		memset(rbuf,0,sizeof(rbuf));
		if(af_read(af,(unsigned char *)rbuf,strlen(wbuf))!=(int)strlen(wbuf)){
		    err(1,"Attempt to read buffer %d failed\n",i);
		}
		if(strcmp(rbuf,wbuf)!=0){
		    errx(1,"Data doesn't verify.\nWrote: '%s'\nRead: '%s'\n",wbuf,rbuf);
		}
	    }
	}
	af_close(af);
    }

    printf("\nReverse test passes.\n");
    printf("======================\n\n");
    return 0;
}
Exemplo n.º 2
0
Arquivo: aff.cpp Projeto: halbbob/dff
int aff::vread(int fd, void *buff, unsigned int size)
{
  int	 	result;
  fdinfo*	fi;
  AffNode*	affNode = NULL;

  try
  {
     fi = this->__fdm->get(fd);
     affNode = dynamic_cast<AffNode* >(fi->node);
  }
  catch (...)
  {
     return (-1); 
  }

  mutex_lock(&io_mutex);
  af_seek(affNode->affile, (int64_t)fi->offset, SEEK_SET);
  result = af_read(affNode->affile, (unsigned char*)buff, size);
  if (result > 0)
    fi->offset += result;
  mutex_unlock(&io_mutex);

  return (result);
}
Exemplo n.º 3
0
/* Note: The routine -assumes- we are under a lock on &(img_info->cache_lock)) */
static ssize_t
aff_read(TSK_IMG_INFO * img_info, TSK_OFF_T offset, char *buf, size_t len)
{
    ssize_t cnt;
    IMG_AFF_INFO *aff_info = (IMG_AFF_INFO *) img_info;

    if (tsk_verbose)
        tsk_fprintf(stderr,
            "aff_read: byte offset: %" PRIuOFF " len: %" PRIuOFF
            "\n", offset, len);

    if (offset > img_info->size) {
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_IMG_READ_OFF);
        tsk_error_set_errstr("aff_read - %" PRIuOFF, offset);
        return -1;
    }

    if (aff_info->seek_pos != offset) {
        if (af_seek(aff_info->af_file, offset, SEEK_SET) != offset) {
            tsk_error_reset();
            // @@@ ADD more specific error messages
            tsk_error_set_errno(TSK_ERR_IMG_SEEK);
            tsk_error_set_errstr("aff_read - %" PRIuOFF " - %s", offset,
                strerror(errno));
            return -1;

        }
        aff_info->seek_pos = offset;
    }

    cnt = af_read(aff_info->af_file, (unsigned char *) buf, len);
    if (cnt < 0) {
        // @@@ Add more specific error message
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_IMG_READ);
        tsk_error_set_errstr("aff_read - offset: %" PRIuOFF " - len: %"
            PRIuSIZE " - %s", offset, len, strerror(errno));
        return -1;
    }

    /* AFF will return 0 if the page does not exist -- fill the 
     * buffer with zeros in this case */
    if (cnt == 0) {
        // @@@ We could improve this if there is an AFF call
        // to see if the data exists or not
        if ((af_eof(aff_info->af_file) == 0) &&
            (offset + len < img_info->size)) {
            memset(buf, 0, len);
            cnt = len;
        }
    }

    aff_info->seek_pos += cnt;
    return cnt;
}
Exemplo n.º 4
0
static PyObject *
affile_seek(affile *self, PyObject *args, PyObject *kwds) {
    int64_t offset=0;
    int whence=0;

    static char *kwlist[] = {"offset", "whence", NULL};
    if(!PyArg_ParseTupleAndKeywords(args, kwds, "L|i", kwlist, 
                                    &offset, &whence))
        return NULL; 

    if(af_seek(self->af, offset, whence) < 0)
        return PyErr_Format(PyExc_IOError, "libaff_seek_offset failed");

    Py_RETURN_NONE;
}
Exemplo n.º 5
0
void large_file_test()
{
    int pagesize = 1024*1024;		// megabyte sized segments
    int64_t num_segments = 5000;
    int64_t i;
    char fn[1024];

    printf("Large file test... Creating a %"I64d"MB file...\n",pagesize*num_segments/(1024*1024));
    filename(fn,sizeof(fn),"large_file");
    AFFILE *af = af_open(fn,O_CREAT|O_RDWR|O_TRUNC,0666);

    unsigned char *buf = (unsigned char *)malloc(pagesize);

    memset(buf,'E', pagesize);
    af_enable_compression(af,opt_compression_type,opt_compression_level);
    af_set_pagesize(af,pagesize);
    af_set_maxsize(af,(int64_t)pagesize * 600);

    for(i=0;i<num_segments;i++){
	sprintf((char *)buf,"%"I64d" page is put here",i);
	if(i%25==0) printf("\rWriting page %"I64d"\r",i);
	if(af_write(af,buf,pagesize)!=pagesize){
	    err(1,"Can't write page %"I64d,i);
	}
    }
    printf("\n\n");
    /* Now let's just read some test locations */
    for(i=0;i<num_segments;i+=num_segments/25){	// check a few places
	int r;
	af_seek(af,pagesize*i,SEEK_SET);
	r = af_read(af,buf,1024);		// just read a bit
	if(r!=1024){
	    err(1,"Tried to read 1024 bytes; got %d\n",r);
	}
	if(atoi((char *)buf)!=i){
	    err(1,"at page %"I64d", expected %"I64d", got %s\n",i,i,buf);
	}
	printf("Page %"I64d" validates\n",i);
    }

    af_close(af);
    if(unlink("large_file.aff")){
	err(1,"Can't delete large_file.aff");
    }
    printf("Large file test passes\n");
}
Exemplo n.º 6
0
Arquivo: aff.c Projeto: anhkgg/temu
static SSIZE_T
aff_read_random(IMG_INFO * img_info, SSIZE_T vol_offset, char *buf,
    OFF_T len, OFF_T offset)
{
    SSIZE_T cnt;
    IMG_AFF_INFO *aff_info = (IMG_AFF_INFO *) img_info;
    off_t tot_offset = offset + vol_offset;

    if (verbose)
	fprintf(stderr,
	    "aff_read_random: byte offset: %" PRIuOFF " len: %" PRIuOFF
	    "\n", offset, len);


    if (aff_info->seek_pos != tot_offset) {
	if ((off_t) af_seek(aff_info->af_file, tot_offset, SEEK_SET) !=
	    tot_offset) {
	    // @@@ ADD more specific error messages
	    tsk_errno = TSK_ERR_IMG_SEEK;
	    snprintf(tsk_errstr, TSK_ERRSTR_L,
		"aff_read_random - %" PRIuOFF " - %s", tot_offset,
		strerror(errno));
	    tsk_errstr2[0] = '\0';
	    return -1;

	}
	aff_info->seek_pos = tot_offset;
    }

    cnt = af_read(aff_info->af_file, (unsigned char *) buf, len);
    if (cnt == -1) {
	// @@@ Add more specific error message
	tsk_errno = TSK_ERR_IMG_READ;
	snprintf(tsk_errstr, TSK_ERRSTR_L,
	    "aff_read_random - offset: %" PRIuOFF " - len: %"
	    PRIuOFF " - %s", tot_offset, len, strerror(errno));
	tsk_errstr2[0] = '\0';
	return -1;
    }

    aff_info->seek_pos += cnt;
    return cnt;
}
Exemplo n.º 7
0
static int
affuse_read(const char *path, char *buf, size_t size, off_t offset,
            struct fuse_file_info *fi)
{
    int res = 0;
    (void) fi;
    if(strcmp(path, raw_path) != 0){
        return -ENOENT;
    }

    /* TODO: change to sector aligned readings to write NULLs to bad
     * blocks... */
    /* looks like af_seek never fails */
    af_seek(af_image, (uint64_t)offset, SEEK_SET);
    errno = 0;
    res = af_read(af_image, (unsigned char *)buf, (int)size);
    if (res<0){
	if (errno==0) errno=-EIO;
	else res = -errno;
    }
    return res;
}
Exemplo n.º 8
0
TSK_IMG_INFO *
aff_open(const TSK_TCHAR * const images[], unsigned int a_ssize)
{
    IMG_AFF_INFO *aff_info;
    TSK_IMG_INFO *img_info;
    int type;
    char *image;

#ifdef TSK_WIN32
    // convert wchar_t* image path to char* to conform to
    // the AFFLIB API
    UTF16 *utf16 = (UTF16 *)images[0];
    size_t ilen = wcslen(utf16);
    size_t olen = ilen*4 + 1;
    UTF8 *utf8 = (UTF8 *) tsk_malloc(olen);

    image = (char *) utf8;
    if ( image == NULL )
        return NULL;
    TSKConversionResult retval =
    tsk_UTF16toUTF8_lclorder( (const UTF16 **) &utf16,
        &utf16[ilen], &utf8,
        &utf8[olen], TSKlenientConversion );
    *utf8 = '\0';
    if (retval != TSKconversionOK) {
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_FS_UNICODE);
        tsk_error_set_errstr("aff_open file: %" PRIttocTSK
            ": Error converting path to UTF-8 %d\n",
            images[0], retval);
        free(image);
        return NULL;
    }
    utf8 = (UTF8 *) image;
    while ( *utf8 ) {
        if ( *utf8 > 127 ) {
            tsk_error_reset();
            tsk_error_set_errno(TSK_ERR_FS_UNICODE);
            tsk_error_set_errstr("aff_open file: %" PRIttocTSK
                ": Non-Latin paths are not supported for AFF images\n",
                images[0]);
            free(image);
            return NULL;
        }
        utf8++;
    }
#else
    image = (char *) tsk_malloc( strlen(images[0])+1 );
    if ( image == NULL )
        return NULL;
    strncpy(image, images[0], strlen(images[0])+1 );
#endif

    if ((aff_info =
            (IMG_AFF_INFO *) tsk_img_malloc(sizeof(IMG_AFF_INFO))) ==
        NULL) {
        free(image);
        return NULL;
    }

    img_info = (TSK_IMG_INFO *) aff_info;
    img_info->read = aff_read;
    img_info->close = aff_close;
    img_info->imgstat = aff_imgstat;

    img_info->sector_size = 512;
    if (a_ssize)
        img_info->sector_size = a_ssize;

    type = af_identify_file_type(image, 1);
    if ((type == AF_IDENTIFY_ERR) || (type == AF_IDENTIFY_NOEXIST)) {
        if (tsk_verbose) {
            tsk_fprintf(stderr,
                "aff_open: Error determining type of file: %" PRIttocTSK
                "\n", images[0]);
            perror("aff_open");
        }
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_IMG_OPEN);
        tsk_error_set_errstr("aff_open file: %" PRIttocTSK
            ": Error checking type", images[0]);
        tsk_img_free(aff_info);
        free(image);
        return NULL;
    }
    else if (type == AF_IDENTIFY_AFF) {
        img_info->itype = TSK_IMG_TYPE_AFF_AFF;
    }
    else if (type == AF_IDENTIFY_AFD) {
        img_info->itype = TSK_IMG_TYPE_AFF_AFD;
    }
    else if (type == AF_IDENTIFY_AFM) {
        img_info->itype = TSK_IMG_TYPE_AFF_AFM;
    }
    else {
        img_info->itype = TSK_IMG_TYPE_AFF_ANY;
    }

    aff_info->af_file = af_open(image, O_RDONLY | O_BINARY, 0);
    if (!aff_info->af_file) {
        // @@@ Need to check here if the open failed because of an incorrect password. 
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_IMG_OPEN);
        tsk_error_set_errstr("aff_open file: %" PRIttocTSK
            ": Error opening - %s", images[0], strerror(errno));
        tsk_img_free(aff_info);
        if (tsk_verbose) {
            tsk_fprintf(stderr, "Error opening AFF/AFD/AFM file\n");
            perror("aff_open");
        }
        free(image);
        return NULL;
    }
    // verify that a password was given and we can read encrypted data. 
    if (af_cannot_decrypt(aff_info->af_file)) {
        tsk_error_reset();
        tsk_error_set_errno(TSK_ERR_IMG_PASSWD);
        tsk_error_set_errstr("aff_open file: %" PRIttocTSK, images[0]);
        tsk_img_free(aff_info);
        if (tsk_verbose) {
            tsk_fprintf(stderr,
                "Error opening AFF/AFD/AFM file (incorrect password)\n");
        }
        free(image);
        return NULL;
    }

    aff_info->type = type;

    img_info->size = af_imagesize(aff_info->af_file);

    af_seek(aff_info->af_file, 0, SEEK_SET);
    aff_info->seek_pos = 0;
    free(image);
    return img_info;
}
Exemplo n.º 9
0
void sparse_test()
{
    printf("Sparse test...\n");

    char buf[1024];
    char fn[1024];

    uint64_t mult = (uint64_t)3 * (uint64_t)1000000000;		// 3GB in

    AFFILE *af = af_open(filename(fn,sizeof(fn),"sparse"),O_CREAT|O_RDWR|O_TRUNC,0666);
    af_enable_compression(af,opt_compression_type,opt_compression_level);
    af_set_maxsize(af,(int64_t)1024*1024*256);
    af_set_pagesize(af,1024*1024*16);

    for(u_int i=0;i<10;i++){
	uint64_t pos = mult*i;
	memset(buf,0,sizeof(buf));
	snprintf(buf,sizeof(buf),"This is at location=%"I64u"\n",pos);
	af_seek(af,pos,SEEK_SET);
	af_write(af,(unsigned char *)buf,sizeof(buf));
    }

    /* Now verify */
    for(u_int i=0;i<10;i++){
	uint64_t pos = mult*i;
	uint64_t q;
	af_seek(af,pos,SEEK_SET);
	af_read(af,(unsigned char *)buf,sizeof(buf));
	char *cc = strchr(buf,'=');
	if(!cc){
	    printf("Garbage read at location %"I64u"\n.",pos);
	    exit(1);
	}
	if(sscanf(cc+1,"%"I64u,&q)!=1){
	    printf("Could not decode value at location %"I64u"(%s)\n",pos,cc+1);
	    exit(1);
	}
	if(pos!=q){
	    printf("Wrong value at location %"I64u"; read %"I64u" in error.\n", pos,q);
	    exit(1);
	}
    }

    /* Now seek to somewhere that no data has been written and see if we get 0s. */
    memset(buf,'g',sizeof(buf));
    af_seek(af,mult/2,SEEK_SET);
    ssize_t r = af_read(af,(unsigned char *)buf,sizeof(buf));
    if(r!=sizeof(buf)){
	err(1,"Tried to read %zd bytes at mult/2; got %zd bytes\n",sizeof(buf),r);
    }
    for(u_int i=0;i<sizeof(buf);i++){
	if(buf[i]!=0) err(1,"data error; buf[%d]=%d\n",i,buf[i]);
    }

    /* Now try to read the last page in the file */
    unsigned char big_buf[65536];
    af_seek(af,9*mult,SEEK_SET);
    r = af_read(af,big_buf,sizeof(big_buf));
    if(r!=sizeof(buf)){
	errx(1,"Tried to read %zd bytes at the end of the file; got %zd bytes (should get %zd)",
	    sizeof(big_buf),r,sizeof(buf));
    }
			  

    /* Now see if we can read past the end of the file */
    af_seek(af,11*mult,SEEK_SET);
    r = af_read(af,(unsigned char *)buf,sizeof(buf));
    if(r!=0) errx(1,"Tried to read past end of file; got %zd bytes (should get 0)",r);

    af_close(af);
    printf("\nSprase test passes.\n");
    printf("=====================\n\n");
}
Exemplo n.º 10
0
int random_read_test(int total_bytes,int data_page_size)
{
    printf("\n\n\nrandom read test. filesize=%d, page_size=%d\n",
	   total_bytes,data_page_size);

    /* Create a regular file and an AFF file */

    printf("Creating random_contents.img and random_contents.%s, "
	   "both with %d bytes of user data...\n",
	   opt_ext,total_bytes);

    int    fd = open("test_random_contents.img",
		     O_CREAT|O_RDWR|O_TRUNC|O_BINARY,0666);
    if(fd<0) err(1,"fopen");

    AFFILE *af = open_testfile("test_random_contents",1);

    /* Just write it out as one big write */

    unsigned char *buf = (unsigned char *)malloc(total_bytes);
    unsigned char *buf2 = (unsigned char *)malloc(total_bytes);

    /* First half is random */
#ifdef HAVE_RAND_PSEUDO_BYTES
    RAND_pseudo_bytes(buf,total_bytes/2);
#else
    for(int i=0;i<total_bytes/2;i++){
	buf[i] = random();
    }
#endif

    /* Second half is a bit more predictable */
    for(int i=total_bytes/2;i<total_bytes;i++){
	buf[i] = ((i % 256) + (i / 256)) % 256;
    }

    if(write(fd,buf,total_bytes)!=total_bytes) err(1,"fwrite");
    if(af_write(af,buf,total_bytes)!=(int)total_bytes) err(1,"af_write");

    /* Now try lots of seeks and reads */
    for(int i=0;i<MAX_FMTS;i++){
	uint32_t loc = rand() % total_bytes;
	uint32_t len = rand() % total_bytes;
	memset(buf,0,total_bytes);
	memset(buf2,0,total_bytes);

	if(i%250==0) printf("\r#%d  reading %"PRIu32" bytes at %"PRIu32"    ...",i,loc,len);
	fflush(stdout);

	uint32_t l1 = (uint32_t)lseek(fd,loc,SEEK_SET);
	uint32_t l2 = (uint32_t)af_seek(af,loc,SEEK_SET);


	if(l1!=l2){
	    err(1,"l1 (%"PRIu32") != l2 (%"PRIu32")",l1,l2);
	}

	int r1 = read(fd,buf,len);
	int r2 = af_read(af,buf2,len);

	if(r1!=r2){
	    err(1,"r1 (%d) != r2 (%d)",r1,r2);
	}
    }
    af_close(af);
    close(fd);
    printf("\nRandom read test passes\n");
    return 0;
}
Exemplo n.º 11
0
int random_write_test()
{
    char buf[1024];
    char *tally = (char *)calloc(MAX_FMTS,1);
    int i;

    memset(tally,0,sizeof(tally));

    /* Create the AFF file */
    sprintf(buf,fmt,0);		// figure out how big fmt string is
    int fmt_size = strlen(buf);

    printf("Random write test...\n");
    printf("Creating test file with  %d byte records.\n", fmt_size);

    AFFILE *af = open_testfile("test_random",1);

    if(af_write(af,(unsigned char *)buf,fmt_size)!=fmt_size){
	err(1,"af_write");
    }
    for(i=0;i<MAX_FMTS;i++){
	/* Find a random spot that's available */
	int pos = rand() % MAX_FMTS;
	while(tally[pos]==1){		//  if this one is used, find next
	    pos = (pos + 1) % MAX_FMTS;
	}
	tally[pos] = 1;
	sprintf(buf,fmt,pos);
	assert((int)strlen(buf)==fmt_size);	// make sure
	af_seek(af,fmt_size*pos,SEEK_SET);
	int wrote = af_write(af,(unsigned char *)buf,fmt_size);
	if(wrote !=fmt_size){
	    fprintf(stderr,"Attempt to write buffer #%d \n",pos);
	    fprintf(stderr,"wrote %d bytes instead of %d bytes\n",wrote,fmt_size);
	    exit(1);
	}
	if(i%250==0) printf("\r%d ...",i);
	fflush(stdout);
    }
    af_close(af);
    
    /* Now verify what was written */
    printf("Verifying write test...\n");
    af = open_testfile("test_random",0);
    
    for(i=0;i<MAX_FMTS;i++){
	char should[256];		// what we should get
	sprintf(should,fmt,i);
	int got = af_read(af,(unsigned char *)buf,fmt_size);
	if(got != fmt_size){
	    fprintf(stderr,"Attempt to read %d bytes; got %d\n",fmt_size,got);
	    exit(1);
	}
	if(i%250==24) printf("\r%d .. %d okay",i-24,i);
    }
    af_close(af);
    printf("\n");
    printf("\nRandom write test passes.\n");
    printf("======================\n");
    return 0;
}
Exemplo n.º 12
0
Arquivo: aff.c Projeto: anhkgg/temu
IMG_INFO *
aff_open(const char **images, IMG_INFO * next)
{
    IMG_AFF_INFO *aff_info;
    IMG_INFO *img_info;
    int type;

    if (next != NULL) {
	tsk_errno = TSK_ERR_IMG_LAYERS;
	snprintf(tsk_errstr, TSK_ERRSTR_L, "AFF must be lowest layer");
	tsk_errstr2[0] = '\0';
	return NULL;
    }

    aff_info = (IMG_AFF_INFO *) mymalloc(sizeof(IMG_AFF_INFO));
    if (aff_info == NULL) {
	return NULL;
    }
    memset((void *) aff_info, 0, sizeof(IMG_AFF_INFO));

    img_info = (IMG_INFO *) aff_info;

    img_info->read_random = aff_read_random;
    img_info->get_size = aff_get_size;
    img_info->close = aff_close;
    img_info->imgstat = aff_imgstat;


    type = af_identify_type(images[0]);
    if ((type == AF_IDENTIFY_ERR) || (type == AF_IDENTIFY_NOEXIST)) {
	if (verbose) {
	    fprintf(stderr,
		"aff_open: Error determining type of file: %s\n",
		images[0]);
	    perror("aff_open");
	}
	tsk_errno = TSK_ERR_IMG_OPEN;
	snprintf(tsk_errstr, TSK_ERRSTR_L,
	    "aff_open file: %s: Error checking type", images[0]);
	tsk_errstr2[0] = '\0';
	free(aff_info);
	return NULL;
    }
    else if (type == AF_IDENTIFY_AFF) {
	img_info->itype = AFF_AFF;
    }
    else if (type == AF_IDENTIFY_AFD) {
	img_info->itype = AFF_AFD;
    }
    else if (type == AF_IDENTIFY_AFM) {
	img_info->itype = AFF_AFM;
    }
//    else if ((type == AF_IDENTIFY_EVF) || (type ==AF_IDENTIFY_EVD  )) {
//      img_info->itype = AFF_AFF;
    //   }
    else {
	tsk_errno = TSK_ERR_IMG_MAGIC;
	snprintf(tsk_errstr, TSK_ERRSTR_L,
	    "aff_open: Not an AFF, AFD, or AFM file");
	tsk_errstr2[0] = '\0';
	free(aff_info);
	if (verbose)
	    fprintf(stderr, "Not an AFF/AFD/AFM file\n");

	return NULL;
    }

    aff_info->af_file = af_open(images[0], O_RDONLY, 0);
    if (!aff_info->af_file) {
	tsk_errno = TSK_ERR_IMG_OPEN;
	snprintf(tsk_errstr, TSK_ERRSTR_L,
	    "aff_open file: %s: Error opening - %s", images[0],
	    strerror(errno));
	tsk_errstr2[0] = '\0';
	free(aff_info);
	if (verbose) {
	    fprintf(stderr, "Error opening AFF/AFD/AFM file\n");
	    perror("aff_open");
	}
	return NULL;
    }
    aff_info->type = type;

    img_info->size = af_imagesize(aff_info->af_file);

    af_seek(aff_info->af_file, 0, SEEK_SET);
    aff_info->seek_pos = 0;

    return img_info;
}