1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file hash_file.c
15 Hash a file, Tom St Denis
16 */
17
18 /**
19 @param hash The index of the hash desired
20 @param fname The name of the file you wish to hash
21 @param out [out] The destination of the digest
22 @param outlen [in/out] The max size and resulting size of the message digest
23 @result CRYPT_OK if successful
24 */
hash_file(int hash,const char * fname,unsigned char * out,unsigned long * outlen)25 int hash_file(int hash, const char *fname, unsigned char *out, unsigned long *outlen)
26 {
27 #ifdef LTC_NO_FILE
28 return CRYPT_NOP;
29 #else
30 FILE *in;
31 int err;
32 LTC_ARGCHK(fname != NULL);
33 LTC_ARGCHK(out != NULL);
34 LTC_ARGCHK(outlen != NULL);
35
36 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
37 return err;
38 }
39
40 in = fopen(fname, "rb");
41 if (in == NULL) {
42 return CRYPT_FILE_NOTFOUND;
43 }
44
45 err = hash_filehandle(hash, in, out, outlen);
46 if (fclose(in) != 0) {
47 return CRYPT_ERROR;
48 }
49
50 return err;
51 #endif
52 }
53
54
55 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_file.c,v $ */
56 /* $Revision: 1.4 $ */
57 /* $Date: 2006/03/31 14:15:35 $ */
58