(2021-09-05 15:34:56 -0600, (build 0f85ef34e975))
Hashing functions.
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#include <config.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <wget.h>
#include "private.h"
#include "md2.h"
#include "md5.h"
#include "sha1.h"
#include "sha256.h"
#include "sha512.h"
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wget_digest_algorithm | wget_hash_get_algorithm (const char *hashname) |
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int | wget_hash_fast (wget_digest_algorithm algorithm, const void *text, size_t textlen, void *digest) |
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int | wget_hash_get_len (wget_digest_algorithm algorithm) |
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int | wget_hash_init (wget_hash_hd **handle, wget_digest_algorithm algorithm) |
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int | wget_hash (wget_hash_hd *handle, const void *text, size_t textlen) |
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int | wget_hash_deinit (wget_hash_hd **handle, void *digest) |
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int | wget_hash_file_fd (const char *hashname, int fd, char *digest_hex, size_t digest_hex_size, off_t offset, off_t length) |
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int | wget_hash_file_offset (const char *hashname, const char *fname, char *digest_hex, size_t digest_hex_size, off_t offset, off_t length) |
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int | wget_hash_file (const char *hashname, const char *fname, char *digest_hex, size_t digest_hex_size) |
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◆ wget_hash_get_algorithm()
- Parameters
-
[in] | hashname | Name of the hashing algorithm (see table below) |
- Returns
- A constant to be used by libwget hashing functions
Get the hashing algorithms list item that corresponds to the named hashing algorithm.
This function returns a constant that uniquely identifies a known supported hashing algorithm within libwget. All the supported algorithms are listed in the wget_digest_algorithm enum.
Algorithm name | Constant |
sha1 or sha-1 | WGET_DIGTYPE_SHA1 |
sha256 or sha-256 | WGET_DIGTYPE_SHA256 |
sha512 or sha-512 | WGET_DIGTYPE_SHA512 |
sha224 or sha-224 | WGET_DIGTYPE_SHA224 |
sha384 or sha-384 | WGET_DIGTYPE_SHA384 |
md5 | WGET_DIGTYPE_MD5 |
md2 | WGET_DIGTYPE_MD2 |
rmd160 | WGET_DIGTYPE_RMD160 |
◆ wget_hash_file_fd()
int wget_hash_file_fd |
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const char * |
hashname, |
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int |
fd, |
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char * |
digest_hex, |
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size_t |
digest_hex_size, |
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off_t |
offset, |
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off_t |
length |
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) |
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- Parameters
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[in] | hashname | Name of the hashing algorithm. See wget_hash_get_algorithm() |
[in] | fd | File descriptor for the target file |
[out] | digest_hex | caller-supplied buffer that will contain the resulting hex string |
[in] | digest_hex_size | Length of digest_hex |
[in] | offset | File offset to start hashing at |
[in] | length | Number of bytes to hash, starting from offset . Zero will hash up to the end of the file |
- Returns
- 0 on success or -1 in case of failure
Compute the hash of the contents of the target file and return its hex representation.
This function will encode the resulting hash in a string of hex digits, and place that string in the user-supplied buffer digest_hex
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◆ wget_hash_file_offset()
int wget_hash_file_offset |
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const char * |
hashname, |
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const char * |
fname, |
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char * |
digest_hex, |
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size_t |
digest_hex_size, |
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off_t |
offset, |
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off_t |
length |
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) |
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- Parameters
-
[in] | hashname | Name of the hashing algorithm. See wget_hash_get_algorithm() |
[in] | fname | Target file name |
[out] | digest_hex | Caller-supplied buffer that will contain the resulting hex string |
[in] | digest_hex_size | Length of digest_hex |
[in] | offset | File offset to start hashing at |
[in] | length | Number of bytes to hash, starting from offset . Zero will hash up to the end of the file |
- Returns
- 0 on success or -1 in case of failure
Compute the hash of the contents of the target file starting from offset
and up to length
bytes and return its hex representation.
This function will encode the resulting hash in a string of hex digits, and place that string in the user-supplied buffer digest_hex
.
◆ wget_hash_file()
int wget_hash_file |
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const char * |
hashname, |
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const char * |
fname, |
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char * |
digest_hex, |
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size_t |
digest_hex_size |
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) |
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- Parameters
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[in] | hashname | Name of the hashing algorithm. See wget_hash_get_algorithm() |
[in] | fname | Target file name |
[out] | digest_hex | Caller-supplied buffer that will contain the resulting hex string |
[in] | digest_hex_size | Length of digest_hex |
- Returns
- 0 on success or -1 in case of failure
Compute the hash of the contents of the target file and return its hex representation.
This function will encode the resulting hash in a string of hex digits, and place that string in the user-supplied buffer digest_hex
.