| // SPDX-License-Identifier: BSD-2-Clause |
| /* 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. |
| */ |
| #include "tomcrypt_private.h" |
| |
| #ifndef LTC_NO_FILE |
| /** |
| @file hash_filehandle.c |
| Hash open files, Tom St Denis |
| */ |
| |
| /** |
| Hash data from an open file handle. |
| @param hash The index of the hash you want to use |
| @param in The FILE* handle of the file you want to hash |
| @param out [out] The destination of the digest |
| @param outlen [in/out] The max size and resulting size of the digest |
| @result CRYPT_OK if successful |
| */ |
| int hash_filehandle(int hash, FILE *in, unsigned char *out, unsigned long *outlen) |
| { |
| hash_state md; |
| unsigned char *buf; |
| size_t x; |
| int err; |
| |
| LTC_ARGCHK(out != NULL); |
| LTC_ARGCHK(outlen != NULL); |
| LTC_ARGCHK(in != NULL); |
| |
| if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) { |
| return CRYPT_MEM; |
| } |
| |
| if ((err = hash_is_valid(hash)) != CRYPT_OK) { |
| goto LBL_ERR; |
| } |
| |
| if (*outlen < hash_descriptor[hash]->hashsize) { |
| *outlen = hash_descriptor[hash]->hashsize; |
| err = CRYPT_BUFFER_OVERFLOW; |
| goto LBL_ERR; |
| } |
| if ((err = hash_descriptor[hash]->init(&md)) != CRYPT_OK) { |
| goto LBL_ERR; |
| } |
| |
| do { |
| x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in); |
| if ((err = hash_descriptor[hash]->process(&md, buf, (unsigned long)x)) != CRYPT_OK) { |
| goto LBL_CLEANBUF; |
| } |
| } while (x == LTC_FILE_READ_BUFSIZE); |
| if ((err = hash_descriptor[hash]->done(&md, out)) == CRYPT_OK) { |
| *outlen = hash_descriptor[hash]->hashsize; |
| } |
| |
| LBL_CLEANBUF: |
| zeromem(buf, LTC_FILE_READ_BUFSIZE); |
| LBL_ERR: |
| XFREE(buf); |
| return err; |
| } |
| #endif /* #ifndef LTC_NO_FILE */ |
| |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |