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#ifndef LIBSSH2_MISC_H
#define LIBSSH2_MISC_H
/* Copyright (C) Daniel Stenberg
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the copyright holder nor the names
* of any other contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifdef LIBSSH2_NO_CLEAR_MEMORY
#define _libssh2_explicit_zero(buf, size) do { \
(void)(buf); \
(void)(size); \
} while(0)
#elif defined(_WIN32)
#define _libssh2_explicit_zero(buf, size) SecureZeroMemory(buf, size)
#elif defined(HAVE_EXPLICIT_BZERO)
#define _libssh2_explicit_zero(buf, size) explicit_bzero(buf, size)
#elif defined(HAVE_EXPLICIT_MEMSET)
#define _libssh2_explicit_zero(buf, size) (void)explicit_memset(buf, 0, size)
#elif defined(HAVE_MEMSET_S)
#define _libssh2_explicit_zero(buf, size) (void)memset_s(buf, size, 0, size)
#else
#define LIBSSH2_MEMZERO
void _libssh2_memzero(void *buf, size_t size);
#define _libssh2_explicit_zero(buf, size) _libssh2_memzero(buf, size)
#endif
struct list_head {
struct list_node *last;
struct list_node *first;
};
struct list_node {
struct list_node *next;
struct list_node *prev;
struct list_head *head;
};
struct string_buf {
unsigned char *data;
unsigned char *dataptr;
size_t len;
};
int _libssh2_error_flags(LIBSSH2_SESSION* session, int errcode,
const char *errmsg, int errflags);
int _libssh2_error(LIBSSH2_SESSION* session, int errcode, const char *errmsg);
#ifdef _WIN32
/* Convert Win32 WSAGetLastError to errno equivalent */
int _libssh2_wsa2errno(void);
#endif
void _libssh2_list_init(struct list_head *head);
/* add a node last in the list */
void _libssh2_list_add(struct list_head *head,
struct list_node *entry);
/* return the "first" node in the list this head points to */
void *_libssh2_list_first(struct list_head *head);
/* return the next node in the list */
void *_libssh2_list_next(struct list_node *node);
/* return the prev node in the list */
void *_libssh2_list_prev(struct list_node *node);
/* remove this node from the list */
void _libssh2_list_remove(struct list_node *entry);
int _libssh2_base64_decode(LIBSSH2_SESSION *session,
char **data, size_t *datalen,
const char *src, size_t src_len);
size_t _libssh2_base64_encode(LIBSSH2_SESSION *session,
const char *inp, size_t insize, char **outptr);
uint32_t _libssh2_ntohu32(const unsigned char *buf);
libssh2_uint64_t _libssh2_ntohu64(const unsigned char *buf);
void _libssh2_htonu32(unsigned char *buf, uint32_t val);
void _libssh2_store_u32(unsigned char **buf, uint32_t value);
int _libssh2_store_str(unsigned char **buf, const char *str, size_t len);
int _libssh2_store_bignum2_bytes(unsigned char **buf,
const unsigned char *bytes,
size_t len);
void *_libssh2_calloc(LIBSSH2_SESSION *session, size_t size);
struct string_buf *_libssh2_string_buf_new(LIBSSH2_SESSION *session);
void _libssh2_string_buf_free(LIBSSH2_SESSION *session,
struct string_buf *buf);
int _libssh2_get_boolean(struct string_buf *buf, unsigned char *out);
int _libssh2_get_byte(struct string_buf *buf, unsigned char *out);
int _libssh2_get_u32(struct string_buf *buf, uint32_t *out);
int _libssh2_get_u64(struct string_buf *buf, libssh2_uint64_t *out);
int _libssh2_match_string(struct string_buf *buf, const char *match);
int _libssh2_get_string(struct string_buf *buf, unsigned char **outbuf,
size_t *outlen);
int _libssh2_copy_string(LIBSSH2_SESSION* session, struct string_buf *buf,
unsigned char **outbuf, size_t *outlen);
int _libssh2_get_bignum_bytes(struct string_buf *buf, unsigned char **outbuf,
size_t *outlen);
int _libssh2_check_length(struct string_buf *buf, size_t requested_len);
int _libssh2_eob(struct string_buf *buf);
void _libssh2_xor_data(unsigned char *output,
const unsigned char *input1,
const unsigned char *input2,
size_t length);
void _libssh2_aes_ctr_increment(unsigned char *ctr, size_t length);
#endif /* LIBSSH2_MISC_H */
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