- 1 year ago
How to do a simple SMB client-side authentication in C?
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To authenticate with an SMB server using C, you can use the SMB client library in Samba. The library provides functions for creating a session with an SMB server and authenticating with it. Here is a simple example of how to authenticate with an SMB server using the Samba library:
c#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <smbclient.h>
int main(int argc, char **argv) {
const char *sharename = "smb://server/share";
const char *username = "username";
const char *password = "password";
smbc_init(smbc_get_auth_data);
SMBCCTX *context = smbc_new_context();
if (context == NULL) {
fprintf(stderr, "Failed to create SMB context: %s\n", strerror(errno));
return EXIT_FAILURE;
}
smbc_set_context(context);
SMBCFILE *file = smbc_open(context, sharename, O_RDONLY, 0);
if (file == NULL) {
fprintf(stderr, "Failed to open SMB file: %s\n", strerror(errno));
smbc_free_context(context, 1);
return EXIT_FAILURE;
}
smbc_set_credentials(context, username, password, "DOMAIN");
// do something with the file...
smbc_close(file);
smbc_free_context(context, 1);
return EXIT_SUCCESS;
}
In this example, we first initialize the Samba library by calling smbc_init
with a function that returns authentication data (in this case, smbc_get_auth_data
). We then create a new SMB context with smbc_new_context
, open an SMB file with smbc_open
, and set the credentials for the context with smbc_set_credentials
. Finally, we do something with the file (omitted in this example), close the file with smbc_close
, and free the context with smbc_free_context
.