curl/lib/curl_hmac.h
Viktor Szakats 17162dcb27
build: fix libssh2 + CURL_DISABLE_DIGEST_AUTH + CURL_DISABLE_AWS
Builds with libssh2 + `-DCURL_DISABLE_DIGEST_AUTH=ON` +
`-DCURL_DISABLE_AWS=ON` in combination with either Schannel on Windows,
or `-DCURL_DISABLE_NTLM=ON` on other operating systems failed while
compiling due to a missing HMAC declaration.

The reason is that HMAC is required by `lib/sha256.c` which publishes
`Curl_sha256it()` which is required by `lib/vssh/libssh2.c` when
building for libssh2 v1.8.2 (2019-05-25) or older.

Make sure to compile the HMAC bits for a successful build.

Both HMAC and `Curl_sha256it()` rely on the same internals, so splitting
them into separate sources isn't practical.

Fixes:
```
[...]
In file included from ./curl/_x64-win-ucrt-cmake-llvm-bld/lib/CMakeFiles/libcurl_object.dir/Unity/unity_0_c.c:310:
./curl/lib/sha256.c:527:42: error: array has incomplete element type 'const struct HMAC_params'
  527 | const struct HMAC_params Curl_HMAC_SHA256[] = {
      |                                          ^
./curl/lib/curl_sha256.h:34:21: note: forward declaration of 'struct HMAC_params'
[...]
```

Regression from e92edfbef6 #11490

Fixes #12273
Closes #12332
2023-11-15 20:57:49 +00:00

79 lines
3.0 KiB
C

#ifndef HEADER_CURL_HMAC_H
#define HEADER_CURL_HMAC_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#if (defined(USE_CURL_NTLM_CORE) && !defined(USE_WINDOWS_SSPI)) \
|| !defined(CURL_DISABLE_AWS) || !defined(CURL_DISABLE_DIGEST_AUTH) \
|| defined(USE_LIBSSH2)
#include <curl/curl.h>
#define HMAC_MD5_LENGTH 16
typedef CURLcode (* HMAC_hinit_func)(void *context);
typedef void (* HMAC_hupdate_func)(void *context,
const unsigned char *data,
unsigned int len);
typedef void (* HMAC_hfinal_func)(unsigned char *result, void *context);
/* Per-hash function HMAC parameters. */
struct HMAC_params {
HMAC_hinit_func
hmac_hinit; /* Initialize context procedure. */
HMAC_hupdate_func hmac_hupdate; /* Update context with data. */
HMAC_hfinal_func hmac_hfinal; /* Get final result procedure. */
unsigned int hmac_ctxtsize; /* Context structure size. */
unsigned int hmac_maxkeylen; /* Maximum key length (bytes). */
unsigned int hmac_resultlen; /* Result length (bytes). */
};
/* HMAC computation context. */
struct HMAC_context {
const struct HMAC_params *hmac_hash; /* Hash function definition. */
void *hmac_hashctxt1; /* Hash function context 1. */
void *hmac_hashctxt2; /* Hash function context 2. */
};
/* Prototypes. */
struct HMAC_context *Curl_HMAC_init(const struct HMAC_params *hashparams,
const unsigned char *key,
unsigned int keylen);
int Curl_HMAC_update(struct HMAC_context *context,
const unsigned char *data,
unsigned int len);
int Curl_HMAC_final(struct HMAC_context *context, unsigned char *result);
CURLcode Curl_hmacit(const struct HMAC_params *hashparams,
const unsigned char *key, const size_t keylen,
const unsigned char *data, const size_t datalen,
unsigned char *output);
#endif
#endif /* HEADER_CURL_HMAC_H */