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odzhanodzhan
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‎os/linux/c/Makefile‎

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tls:
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gcc -N -O0 -fno-stack-protector -nostdlib tls.c -fpic -o tls
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objcopy -O binary --only-section=.text tls tls.bin
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xxd -i tls.bin > tls.h
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clean:
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rm tls.bin tls

‎os/linux/c/include.h‎

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/**
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Copyright © 2019 Odzhan. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY AUTHORS "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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// https://gnutls.org/manual/html_node/How-to-use-GnuTLS-in-applications.html#How-to-use-GnuTLS-in-applications
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/epoll.h>
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#include <errno.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <dirent.h>
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#include <glob.h>
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#include <link.h>
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#include <elf.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <sys/mman.h>
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#include <gnutls/gnutls.h>
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// system calls required to query base address of host process
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long _open(const char *, unsigned long, long);
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int _read(long, char *, unsigned long);
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int _close(unsigned int);
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void *_mmap(void *, unsigned long, unsigned long, unsigned long, long, unsigned long);
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int _munmap(void *, size_t);
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int _fstat(long, void *);
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typedef pid_t (*fork_t)(void);
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typedef int (*dup2_t)(int oldfd, int newfd);
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typedef int (*execve_t)(const char *filename, char *const argv[], char *const envp[]);
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typedef int (*pipe_t)(int pipefd[2]);
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typedef int (*open_t)(const char *pathname, int flags);
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typedef ssize_t (*write_t)(int fd, const void *buf, size_t count);
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typedef ssize_t (*read_t)(int fd, void *buf, size_t count);
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typedef int (*close_t)(int fd);
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typedef void *(*malloc_t)(size_t size);
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typedef void (*free_t)(void *ptr);
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typedef int (*kill_t)(pid_t pid, int sig);
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typedef int (*globfunc_t)(const char *pattern, int flags, int (*errfunc) (const char *epath, int eerrno), glob_t *pglob);
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typedef void (*globfree_t)(glob_t *pglob);
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typedef int (*dlinfo_t)(void *handle, int request, void *info);
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typedef void *(*dlopen_t)(const char *filename, int flag);
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typedef void *(*dlsym_t)(void *handle, const char *symbol);
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typedef int (*connect_t)(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
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typedef int (*socket_t)(int domain, int type, int protocol);
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typedef in_addr_t (*inet_addr_t)(const char *cp);
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typedef uint16_t (*htons_t)(uint16_t hostshort);
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typedef ssize_t (*send_t)(int sockfd, const void *buf, size_t len, int flags);
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typedef ssize_t (*recv_t)(int sockfd, void *buf, size_t len, int flags);
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typedef int (*shutdown_t)(int socket, int how);
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typedef int (*epoll_create1_t)(int flags);
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typedef int (*epoll_ctl_t)(int epfd, int op, int fd, struct epoll_event *event);
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typedef int (*epoll_wait_t)(int epfd, struct epoll_event *events, int maxevents, int timeout);
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ssize_t _tls_data_push_cb(gnutls_transport_ptr_t ptr, const void *in, size_t inlen);
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ssize_t _tls_data_pull_cb(gnutls_transport_ptr_t ptr, void *out, size_t outlen);
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typedef int (*gnutls_certificate_allocate_credentials_t)(gnutls_certificate_credentials_t * res);
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typedef int (*gnutls_certificate_set_x509_system_trust_t)(gnutls_certificate_credentials_t cred);
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typedef int (*gnutls_init_t)(gnutls_session_t * session, unsigned int flags);
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typedef int (*gnutls_set_default_priority_t)(gnutls_session_t session);
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typedef int (*gnutls_credentials_set_t)(gnutls_session_t session, gnutls_credentials_type_t type, void * cred);
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typedef int (*gnutls_server_name_set_t)(gnutls_session_t session, gnutls_server_name_type_t type, const void * name, size_t name_length);
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typedef int (*gnutls_priority_init_t)(gnutls_priority_t * priority_cache, const char * priorities, const char ** err_pos);
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typedef int (*gnutls_priority_set_t)(gnutls_session_t session, gnutls_priority_t priority);
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typedef ssize_t (*gnutls_record_recv_t)(gnutls_session_t session, void * data, size_t sizeofdata);
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typedef ssize_t (*gnutls_record_send_t)(gnutls_session_t session, const void * data, size_t sizeofdata);
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typedef int (*gnutls_bye_t)(gnutls_session_t session, gnutls_close_request_t how);
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typedef void (*gnutls_deinit_t)(gnutls_session_t session);
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typedef void (*gnutls_global_deinit_t)(void);
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typedef int (*gnutls_error_is_fatal_t)(int error);
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typedef int (*gnutls_handshake_t)(gnutls_session_t session);
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typedef int (*gnutls_transport_set_int2_t)(gnutls_session_t session, int recv_fd, int send_fd);
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typedef void (*gnutls_transport_set_ptr_t)(gnutls_session_t session, gnutls_transport_ptr_t ptr);
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typedef void (*gnutls_transport_set_push_function_t)(gnutls_session_t session, gnutls_push_func push_func);
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typedef void (*gnutls_transport_set_pull_function_t)(gnutls_session_t session, gnutls_pull_func pull_func);
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Elf64_Dyn *elf_get_dyn(void *base, int tag);
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typedef struct _data_t {
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int s; // socket file descriptor
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union {
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uint64_t hash[64];
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void *addr[64];
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struct {
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// gnu c library functions
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pipe_t _pipe;
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fork_t _fork;
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socket_t _socket;
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inet_addr_t _inet_addr;
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htons_t _htons;
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connect_t _connect;
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dup2_t _dup2;
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close_t _close;
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execve_t _execve;
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epoll_create1_t _epoll_create1;
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epoll_ctl_t _epoll_ctl;
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epoll_wait_t _epoll_wait;
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open_t _open;
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write_t _write;
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read_t _read;
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shutdown_t _shutdown;
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kill_t _kill;
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send_t _send;
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recv_t _recv;
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globfunc_t _glob;
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globfree_t _globfree;
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malloc_t _malloc;
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free_t _free;
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// gnu dynamic linker functions
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dlsym_t _dlsym;
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dlopen_t _dlopen;
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dlinfo_t _dlinfo;
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// gnu tls functions
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gnutls_certificate_allocate_credentials_t _gnutls_certificate_allocate_credentials;
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gnutls_certificate_set_x509_system_trust_t _gnutls_certificate_set_x509_system_trust;
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gnutls_init_t _gnutls_init;
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gnutls_set_default_priority_t _gnutls_set_default_priority;
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gnutls_credentials_set_t _gnutls_credentials_set;
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gnutls_server_name_set_t _gnutls_server_name_set;
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gnutls_priority_init_t _gnutls_priority_init;
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gnutls_priority_set_t _gnutls_priority_set;
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gnutls_record_recv_t _gnutls_record_recv;
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gnutls_record_send_t _gnutls_record_send;
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gnutls_bye_t _gnutls_bye;
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gnutls_deinit_t _gnutls_deinit;
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gnutls_global_deinit_t _gnutls_global_deinit;
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gnutls_error_is_fatal_t _gnutls_error_is_fatal;
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gnutls_handshake_t _gnutls_handshake;
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gnutls_transport_set_ptr_t _gnutls_transport_set_ptr;
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gnutls_transport_set_push_function_t _gnutls_transport_set_push_function;
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gnutls_transport_set_pull_function_t _gnutls_transport_set_pull_function;
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gnutls_transport_set_int2_t _gnutls_transport_set_int2;
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};
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} api;
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} data_t;
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int init_ld(data_t *ds);
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int init_libc(data_t *ds);
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int init_gnutls(data_t *ds);
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void *get_proc_address(void *module, const char *name);
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void *get_proc_address2(void *module, uint32_t hash); // using base address
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void *get_proc_address3(const char *path, uint32_t hash); // using file path
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void *get_module_handle(const char *module);
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void *load_module(data_t *ds, const char *path, const char *name);
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void *get_module_handle1(const char *module);
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void *get_module_handle2(const char *module);
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void *get_base(void);
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uint32_t gnu_hash(const uint8_t *name);

‎os/linux/c/tls‎

7.96 KB
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‎os/linux/c/tls.bin‎

4.16 KB
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