| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org |
| */ |
| #include "mycrypt.h" |
| |
| int hash_filehandle(int hash, FILE *in, unsigned char *dst, unsigned long *outlen) |
| { |
| #ifdef NO_FILE |
| return CRYPT_NOP; |
| #else |
| hash_state md; |
| unsigned char buf[512]; |
| size_t x; |
| int err; |
| |
| _ARGCHK(dst != NULL); |
| _ARGCHK(outlen != NULL); |
| _ARGCHK(in != NULL); |
| |
| if ((err = hash_is_valid(hash)) != CRYPT_OK) { |
| return err; |
| } |
| |
| if (*outlen < hash_descriptor[hash].hashsize) { |
| return CRYPT_BUFFER_OVERFLOW; |
| } |
| if ((err = hash_descriptor[hash].init(&md)) != CRYPT_OK) { |
| return err; |
| } |
| |
| *outlen = hash_descriptor[hash].hashsize; |
| do { |
| x = fread(buf, 1, sizeof(buf), in); |
| if ((err = hash_descriptor[hash].process(&md, buf, x)) != CRYPT_OK) { |
| return err; |
| } |
| } while (x == sizeof(buf)); |
| err = hash_descriptor[hash].done(&md, dst); |
| |
| #ifdef CLEAN_STACK |
| zeromem(buf, sizeof(buf)); |
| #endif |
| return err; |
| #endif |
| } |
| |