#include <stdio.h>

#include <stdint.h>

#include <stdlib.h>

typedef struct zip_header {

char sig[4];

uint16_t version;

uint16_t flags;

uint16_t compression;

uint16_t mod_time;

uint16_t mod_date;

uint32_t crc32;

uint32_t compressed_size;

uint32_t uncompressed_size;

uint16_t filename_len;

uint16_t extra_len;

} __attribute__((packed)) zip_header;

int main (void) {

zip_header header;

FILE *zip = fopen("shoe.zip", "r");

fread(&header, 1, sizeof(header), zip);

char *filename = malloc(header.filename_len);

fread(filename, header.filename_len, 1, zip);

char *extra = malloc(header.extra_len);

fread(extra, header.extra_len, 1, zip);

fclose(zip);

printf("version %d\n", header.version);

printf("flags 0x%x\n", header.flags);

printf("compression 0x%x\n", header.compression);

printf("mod time 0x%x\n", header.mod_time);

printf("mod date 0x%x\n", header.mod_date);

printf("crc32 0x%x\n", header.crc32);

printf("compressed size %u\n", header.compressed_size);

printf("uncompressed size %u\n", header.uncompressed_size);

printf("filename len %u\n", header.filename_len);

printf("extra len %u\n", header.extra_len);

printf("filename %s\n", filename);

free(filename);

printf("extra %s\n", extra);

free(extra);

printf("compressed data should start at byte %d\n",

sizeof(header) + header.filename_len + header.extra_len);

}