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hashsum.c File Reference

#include <stdio.h>
#include <string.h>
#include "hasher/hasher.h"

Include dependency graph for hashsum.c:

Include dependency graph

Defines

#define COMMENT
#define __USE_BSD
#define READ_SIZE
#define WRAPPER(NAME, ALGO)
#define CHECK_ALGO()

Functions

int misuse (int argL, char *arg[], const char *msg)
int hashsum_file (FILE *file, const char *path, const char *app, hasher_t *h, char **msg)
int main (int argL, char *arg[])

Variables

const char* E_no_hash = "No hash algorithm specified\n"
const char * E_no_hash_yet = "File argument found, but no hash algorithm yet specified\n"
const char * E_fopen_fail = "Could not open file %s\n"
const char * E_error_read = "%s: error reading %s\n"
const char * E_blank = ""

Define Documentation

#define CHECK_ALGO( )
 

Value:

{\
  if (!algochecked) {\
    if (algostr == NULL)\
      return misuse(argL, arg, E_no_hash_yet);\
    if (strcasecmp(algostr, "md5") == 0)\
      fprintf(stderr, "md5 is not secure.  Refer to van Oorschot's paper:\n"\
                      "  http://www.rsasecurity.com/rsalabs/faq/3-6-6.html\n");\
    algochecked = 1;\
  }\
}\
Lazy programmer. If algostr is not set, complain. If the specified algorithm was md5, complain.

#define COMMENT
 

Value:

A contribution to the open-source movement. Jean-Luc Cooke <jlcooke@certainkey.com> CertainKey Inc. Ottawa Ontario Canada


Created: July 20th, 2001


The following program code is released under the GPL license http://www.gnu.org/copyleft/gpl.html     

  







  

    
      

        

           
#define READ_SIZE
      

    		
  





  

    
       
    
    



Value:
   1024

Number of bytes read in from a file at a time     		
  







  

    
      

        

           
#define WRAPPER(
          
          
NAME, ALGO )
      

    		
  





  

    
       
    
    



Value:
  if (strlen(NAME) <= strlen(arg[0])) {\
    if (strcasecmp(NAME, &arg[0][strlen(arg[0])-strlen(NAME)]) == 0) {\
      algostr = ALGO;\
      if (hasher_setup(&H, algostr) != HASHER_OK)\
        return misuse(argL, arg, hasher_ret_msg(H.err));\
    }\
  }

Lazy programmer. If "/path/to/NAME" was ran, then set the algo to ALGO     		
  







  

    
      

        

           
#define __USE_BSD
      

    		
  





  

    
       
    
    



Value:
    		
  




Function Documentation





  

    
      

        

           
int hashsum_file (
          
          
FILE * file, 
          
        

        

          
          
const char * path, 
          
        

        

          
          
const char * app, 
          
        

        

          
          
hasher_t * h, 
          
        

        

          
          
char ** msg )
          
        


      

    		
  





  

    
       
    
    



Calculate and print the digest of a given file pointer 

Parameters: 




file
 
pointer to the already opened file 


path
 
path of the file already opened 


app
 
the path name used to execute this application 


h
 
hasher_t structure to calculate the hash, hasher_setup() already called 


pointer
 
to a string to store any error messages 





Returns: 

1 on error, 0 on success 

See also: 

hasher_t , hasher_ret_msg , misuse 
    		
  







  

    
      

        

           
int main (
          
          
int argL, 
          
        

        

          
          
char * arg[] )
          
        


      

    		
  





  

    
       
    
    



    

  







  

    
      

        

           
int misuse (
          
          
int argL, 
          
        

        

          
          
char * arg[], 
          
        

        

          
          
const char * msg )
          
        


      

    		
  





  

    
       
    
    



Print an error message 

Parameters: 




argL
 
number of command line arguments 


arg
 
command line arguments 


msg
 
pointer storing the error message to print 





Returns: 


    		
  




Variable Documentation





  

    
      

        

           
const char * E_blank = ""
          
        


      

    		
  





  

    
       
    
    



Empty error message     

  







  

    
      

        

           
const char * E_error_read = "%s: error reading %s\n"
          
        


      

    		
  





  

    
       
    
    



When opening a file fails, eg. directory     

  







  

    
      

        

           
const char * E_fopen_fail = "Could not open file %s\n"
          
        


      

    		
  





  

    
       
    
    



When opening a file fails, eg. permission denied     

  







  

    
      

        

           
const char * E_no_hash = "No hash algorithm specified\n"
          
        


      

    		
  





  

    
       
    
    



When no algorithm is specified     

  







  

    
      

        

           
const char * E_no_hash_yet = "File argument found, but no hash algorithm yet specified\n"
          
        


      

    		
  





  

    
       
    
    



When files are specified but no algorithm     

  










 


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