/* File: file_psb.c Copyright (C) 2006-2009,2013,2021 Christophe GRENIER This software is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_psb) #ifdef HAVE_CONFIG_H #include #endif #ifdef HAVE_STRING_H #include #endif #include #include "types.h" #include "filegen.h" #include "common.h" #ifdef DEBUG_PHOTOSHOP #include "log.h" #endif /* https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/ */ /*@ requires valid_register_header_check(file_stat); */ static void register_header_check_psb(file_stat_t *file_stat); const file_hint_t file_hint_psb= { .extension="psb", .description="Adobe Photoshop Image", .max_filesize=PHOTOREC_MAX_FILE_SIZE, .recover=1, .enable_by_default=1, .register_header_check=®ister_header_check_psb }; struct psb_file_header { char signature[4]; uint16_t version; /* must be 2 */ char reserved[6]; /* must be 0 */ uint16_t channels; /* between 1 and 56 */ uint32_t height; /* max of 300,000 */ uint32_t width; /* max of 300,000 */ uint16_t depth; /* 1, 8, 16 or 32 */ uint16_t color_mode; /* Bitmap = 0; Grayscale = 1; Indexed = 2; RGB = 3; CMYK = 4; Multichannel = 7; Duotone = 8; Lab = 9 */ } __attribute__ ((gcc_struct, __packed__)); /*@ @ requires \valid_read((char *)buffer + (offset .. offset + 3)); @ assigns \nothing; @*/ static uint32_t get_be32(const void *buffer, const unsigned int offset) { const uint32_t *val=(const uint32_t *)((const unsigned char *)buffer+offset); return be32(*val); } /*@ @ requires \valid_read((char *)buffer + (offset .. offset + 7)); @ assigns \nothing; @*/ static uint64_t get_be64(const void *buffer, const unsigned int offset) { const uint64_t *val=(const uint64_t *)((const unsigned char *)buffer+offset); return be64(*val); } /*@ @ requires file_recovery->data_check==&psb_skip_image_data; @ requires valid_data_check_param(buffer, buffer_size, file_recovery); @ ensures valid_data_check_result(\result, file_recovery); @ ensures file_recovery->data_check==\null; @ ensures \result == DC_CONTINUE; @ assigns file_recovery->data_check, file_recovery->calculated_file_size; @*/ static data_check_t psb_skip_image_data(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery) { /*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert buffer_size <= 2 * PHOTOREC_MAX_BLOCKSIZE; */ file_recovery->calculated_file_size+=2; file_recovery->data_check=NULL; return DC_CONTINUE; } /*@ @ requires file_recovery->data_check==&psb_skip_layer_info; @ requires valid_data_check_param(buffer, buffer_size, file_recovery); @ ensures valid_data_check_result(\result, file_recovery); @ ensures file_recovery->data_check==&psb_skip_layer_info || file_recovery->data_check==\null; @ ensures \result == DC_CONTINUE || \result == DC_STOP; @ assigns file_recovery->data_check, file_recovery->calculated_file_size; @*/ static data_check_t psb_skip_layer_info(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery) { /*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert buffer_size <= 2 * PHOTOREC_MAX_BLOCKSIZE; */ if(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size && file_recovery->calculated_file_size + 8 < file_recovery->file_size + buffer_size/2) { const unsigned int i=file_recovery->calculated_file_size + buffer_size/2 - file_recovery->file_size; /*@ assert 0 <= i < buffer_size - 8 ; */ const uint64_t l=get_be64(buffer, i); #ifdef DEBUG_PHOTOSHOP log_info("Layer info at 0x%lx, l=0x%lx\n", (long unsigned)file_recovery->calculated_file_size, (long unsigned)l); #endif if(l> PHOTOREC_MAX_FILE_SIZE) return DC_STOP; file_recovery->calculated_file_size+=l+8; #ifdef DEBUG_PHOTOSHOP log_info("Image data at 0x%lx\n", (long unsigned)file_recovery->calculated_file_size); #endif file_recovery->data_check=&psb_skip_image_data; return psb_skip_image_data(buffer, buffer_size, file_recovery); } return DC_CONTINUE; } /*@ @ requires file_recovery->data_check==&psb_skip_image_resources; @ requires valid_data_check_param(buffer, buffer_size, file_recovery); @ ensures valid_data_check_result(\result, file_recovery); @ ensures file_recovery->data_check==&psb_skip_image_resources || file_recovery->data_check==&psb_skip_layer_info || file_recovery->data_check==\null; @ assigns file_recovery->data_check, file_recovery->calculated_file_size; @*/ static data_check_t psb_skip_image_resources(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery) { /*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert buffer_size <= 2 * PHOTOREC_MAX_BLOCKSIZE; */ if(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size && file_recovery->calculated_file_size + 4 < file_recovery->file_size + buffer_size/2) { const unsigned int i=file_recovery->calculated_file_size + buffer_size/2 - file_recovery->file_size; /*@ assert 0 <= i < buffer_size - 4 ; */ const unsigned int l=get_be32(buffer, i); #ifdef DEBUG_PHOTOSHOP log_info("Image resource at 0x%lx, l=0x%x\n", (long unsigned)file_recovery->calculated_file_size, l); #endif file_recovery->calculated_file_size+=(uint64_t)l+4; #ifdef DEBUG_PHOTOSHOP log_info("Layer info at 0x%lx\n", (long unsigned)file_recovery->calculated_file_size); #endif file_recovery->data_check=&psb_skip_layer_info; return psb_skip_layer_info(buffer, buffer_size, file_recovery); } return DC_CONTINUE; } /*@ @ requires buffer_size >= 32; @ requires file_recovery->data_check==&psb_skip_color_mode; @ requires valid_data_check_param(buffer, buffer_size, file_recovery); @ ensures valid_data_check_result(\result, file_recovery); @ ensures file_recovery->data_check==&psb_skip_color_mode || file_recovery->data_check==&psb_skip_image_resources || file_recovery->data_check==&psb_skip_layer_info || file_recovery->data_check==\null; @ assigns file_recovery->data_check, file_recovery->calculated_file_size; @*/ static data_check_t psb_skip_color_mode(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery) { const struct psb_file_header *hdr=(const struct psb_file_header *)&buffer[buffer_size/2]; const unsigned int channels=be16(hdr->channels); const unsigned int depth=be16(hdr->depth); const unsigned int height=be32(hdr->height); const unsigned int width=be32(hdr->width); /*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */ /*@ assert buffer_size <= 2 * PHOTOREC_MAX_BLOCKSIZE; */ if(channels==0 || channels>56 || height==0 || height>300000 || width==0 || width>300000 || (depth!=1 && depth!=8 && depth!=16 && depth!=32)) return DC_ERROR; if(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size && file_recovery->calculated_file_size + 4 < file_recovery->file_size + buffer_size/2) { const unsigned int i=file_recovery->calculated_file_size + buffer_size/2 - file_recovery->file_size; /*@ assert 0 <= i < buffer_size - 4 ; */ const unsigned int l=get_be32(buffer, i); #ifdef DEBUG_PHOTOSHOP log_info("Color mode at 0x%lx, l=0x%x\n", (long unsigned)file_recovery->calculated_file_size, l); #endif if(l!=0 && l<4) return DC_ERROR; file_recovery->calculated_file_size+=(uint64_t)l+4; file_recovery->data_check=&psb_skip_image_resources; return psb_skip_image_resources(buffer, buffer_size, file_recovery); } return DC_CONTINUE; } /*@ @ requires buffer_size >= sizeof(struct psb_file_header); @ requires separation: \separated(&file_hint_psb, buffer+(..), file_recovery, file_recovery_new); @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new); @ ensures valid_header_check_result(\result, file_recovery_new); @ assigns *file_recovery_new; @*/ static int header_check_psb(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) { const struct psb_file_header *hdr=(const struct psb_file_header *)buffer; const unsigned int channels=be16(hdr->channels); const unsigned int depth=be16(hdr->depth); const unsigned int height=be32(hdr->height); const unsigned int width=be32(hdr->width); #ifdef DEBUG_PHOTOSHOP log_info("channels %u\n", channels); log_info("height %u\n", height); log_info("width %u\n", width); log_info("depth %u\n", depth); log_info("color_mode %u\n", be16(hdr->color_mode)); #endif if(channels==0 || channels>56 || height==0 || height>300000 || width==0 || width>300000 || (depth!=1 && depth!=8 && depth!=16 && depth!=32)) return 0; reset_file_recovery(file_recovery_new); file_recovery_new->min_filesize=70; file_recovery_new->extension=file_hint_psb.extension; if(file_recovery_new->blocksize < 16) return 1; /* File header */ file_recovery_new->calculated_file_size=0x1a; file_recovery_new->data_check=&psb_skip_color_mode; file_recovery_new->file_check=&file_check_size_min; return 1; } static void register_header_check_psb(file_stat_t *file_stat) { static const unsigned char psb_header[6]={'8', 'B', 'P', 'S', 0x00, 0x02}; register_header_check(0, psb_header,sizeof(psb_header), &header_check_psb, file_stat); } #endif