1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/**
* Facebook OAuth2 example using Iddawc library
*
* Copyright 2020-2021 Nicolas Mora <mail@babelouest.org>
*
* License MIT
*
* Compile with
* gcc -o facebook_example facebook_example.c -liddawc -lyder
*/
#include <stdio.h>
#include <string.h>
#include <yder.h>
#include <iddawc.h>
/**
* These are the specific values for Facebook OAuth2 API at the time this code was written
*/
#define AUTH_ENDPOINT "https://www.facebook.com/v5.0/dialog/oauth"
#define TOKEN_ENDPOINT "https://graph.facebook.com/v5.0/oauth/access_token"
#define USERINFO_ENDPOINT "https://graph.facebook.com/v5.0/me?fields=id,name,email"
/**
* Update the values below with your client values
* Register a new OAuth2 client for Facebook:
* https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow/
*/
#define CLIENT_ID "clientXyz"
#define CLIENT_SECRET "secretXyz"
#define REDIRECT_URI "https://www.example.com/"
int main() {
struct _i_session i_session;
int ret;
char redirect_to[4097] = {0};
y_init_logs("iddawc tests", Y_LOG_MODE_CONSOLE, Y_LOG_LEVEL_DEBUG, NULL, "Facebook OAuth2 example");
i_init_session(&i_session);
i_set_parameter_list(&i_session, I_OPT_RESPONSE_TYPE, I_RESPONSE_TYPE_CODE,
I_OPT_AUTH_ENDPOINT, AUTH_ENDPOINT,
I_OPT_TOKEN_ENDPOINT, TOKEN_ENDPOINT,
I_OPT_USERINFO_ENDPOINT, USERINFO_ENDPOINT,
I_OPT_CLIENT_ID, CLIENT_ID,
I_OPT_CLIENT_SECRET, CLIENT_SECRET,
I_OPT_TOKEN_METHOD, I_TOKEN_AUTH_METHOD_SECRET_BASIC,
I_OPT_REDIRECT_URI, REDIRECT_URI,
I_OPT_STATE_GENERATE, 16,
I_OPT_NONE);
// First step: get redirection to login page
if ((ret = i_build_auth_url_get(&i_session)) != I_OK) {
y_log_message(Y_LOG_LEVEL_DEBUG, "Error building auth request: %d", ret);
i_clean_session(&i_session);
return 1;
}
printf("Redirect to:\n%s\n", i_get_str_parameter(&i_session, I_OPT_REDIRECT_TO));
// When the user has logged in the external application, gets redirected with a result, we parse the result
y_log_message(Y_LOG_LEVEL_INFO, "Enter redirect URL");
fgets(redirect_to, 4096, stdin);
redirect_to[strlen(redirect_to)-1] = '\0';
i_set_str_parameter(&i_session, I_OPT_REDIRECT_TO, redirect_to);
if (i_parse_redirect_to(&i_session) != I_OK) {
y_log_message(Y_LOG_LEVEL_DEBUG, "Error parsing redirect_to url");
i_clean_session(&i_session);
return 1;
}
// Run the token request, get the refresh and access tokens
if (i_run_token_request(&i_session) != I_OK) {
y_log_message(Y_LOG_LEVEL_DEBUG, "Error running token request");
i_clean_session(&i_session);
return 1;
}
// And finally we load user info using the access token
if (i_get_userinfo(&i_session, 0) != I_OK) {
y_log_message(Y_LOG_LEVEL_DEBUG, "Error loading userinfo");
i_clean_session(&i_session);
return 1;
}
y_log_message(Y_LOG_LEVEL_DEBUG, "userinfo:\n%s", i_get_str_parameter(&i_session, I_OPT_USERINFO));
// Cleanup session
i_clean_session(&i_session);
y_close_logs();
return 0;
}
|
