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annotate src/lib-oauth2/oauth2-refresh.c @ 21646:7f927c405b2f

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lib-oauth2: Support basic authorization
author Aki Tuomi <aki.tuomi@dovecot.fi>
date Tue, 21 Feb 2017 11:18:37 +0200
parents f6d27a985066
children 8afc52576667
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21575
f6d27a985066 lib-oauth2: Add support library for OAUTH2
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1 /* Copyright (c) 2017 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "ioloop.h"
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5 #include "istream.h"
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6 #include "str.h"
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7 #include "http-client.h"
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8 #include "http-url.h"
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9 #include "json-parser.h"
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10 #include "oauth2.h"
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11 #include "oauth2-private.h"
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12
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13 static void
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14 oauth2_refresh_callback(struct oauth2_request *req,
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15 struct oauth2_refresh_result *res)
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16 {
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17 i_assert(res->success == (res->error == NULL));
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18 i_assert(req->re_callback != NULL);
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19 oauth2_refresh_callback_t *callback = req->re_callback;
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20 req->re_callback = NULL;
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21 callback(res, req->re_context);
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22 oauth2_request_free_internal(req);
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23 }
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24
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25 static bool
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26 oauth2_refresh_field_parse(const struct oauth2_field *field,
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27 struct oauth2_refresh_result *res)
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28 {
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29 if (strcasecmp(field->name, "expires_in") == 0) {
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30 uint32_t expires_in = 0;
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31 if (str_to_uint32(field->value, &expires_in) < 0) {
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32 res->success = FALSE;
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33 res->error = t_strdup_printf(
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34 "Malformed number '%s' in expires_in",
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35 field->value);
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36 return FALSE;
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37 } else {
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38 res->expires_at = ioloop_time + expires_in;
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39 }
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40 } else if (strcasecmp(field->name, "token_type") == 0) {
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41 if (strcasecmp(field->value,"bearer") != 0) {
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42 res->success = FALSE;
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43 res->error = t_strdup_printf(
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44 "Expected Bearer token, got '%s'",
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45 field->value);
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46 return FALSE;
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47 }
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48 } else if (strcasecmp(field->name, "access_token") == 0) {
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49 /* pooled memory */
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50 res->bearer_token = field->value;
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51 }
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52 return TRUE;
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53 }
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54
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55 static void
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56 oauth2_refresh_continue(struct oauth2_request *req, bool success,
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57 const char *error)
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58 {
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59 struct oauth2_refresh_result res;
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60 i_zero(&res);
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61
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62 res.success = success;
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63 res.error = error;
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64
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65 if (res.success) {
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66 const struct oauth2_field *field;
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67 /* see if we can figure out when it expires */
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68 array_foreach(&req->fields, field) {
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69 if (!oauth2_refresh_field_parse(field, &res))
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70 break;
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71 }
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72 }
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73
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74 res.fields = &req->fields;
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75
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76 oauth2_refresh_callback(req, &res);
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77 }
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78
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79 static void
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80 oauth2_refresh_response(const struct http_response *response,
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81 struct oauth2_request *req)
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82 {
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83 if (response->status / 100 != 2) {
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84 oauth2_refresh_continue(req, FALSE, response->reason);
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85 } else {
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86 if (response->payload == NULL) {
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87 oauth2_refresh_continue(req, FALSE, "Missing response body");
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88 return;
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89 }
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90 req->is = response->payload;
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91 i_stream_ref(req->is);
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92 req->parser = json_parser_init(req->is);
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93 req->json_parsed_cb = oauth2_refresh_continue;
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94 req->io = io_add_istream(req->is, oauth2_parse_json, req);
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95 oauth2_parse_json(req);
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96 }
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97 }
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98
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99 #undef oauth2_refresh_start
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100 struct oauth2_request*
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101 oauth2_refresh_start(const struct oauth2_settings *set,
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102 const struct oauth2_request_input *input,
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103 oauth2_refresh_callback_t *callback,
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104 void *context)
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105 {
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106 i_assert(oauth2_valid_token(input->token));
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107
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108 pool_t pool = pool_alloconly_create_clean("oauth2 refresh", 1024);
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109 struct oauth2_request *req =
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110 p_new(pool, struct oauth2_request, 1);
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111 struct http_url *url;
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112 const char *error;
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113 struct oauth2_refresh_result fail = {
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114 .success = FALSE
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115 };
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116
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117 req->pool = pool;
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118 req->set = set;
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119 req->re_callback = callback;
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120 req->re_context = context;
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121
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122
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123 if (http_url_parse(req->set->refresh_url, NULL, HTTP_URL_ALLOW_USERINFO_PART,
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124 pool, &url, &error) < 0) {
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125 fail.error = t_strdup_printf("http_url_parse(%s) failed: %s",
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126 req->set->refresh_url, error);
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127 oauth2_refresh_callback(req, &fail);
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128 return req;
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129 }
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130
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131 req->req = http_client_request_url(req->set->client, "POST", url,
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132 oauth2_refresh_response,
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133 req);
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134 string_t *payload = str_new(req->pool, 128);
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135 str_append(payload, "client_secret=");
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136 http_url_escape_param(payload, req->set->client_secret);
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137 str_append(payload, "&grant_type=refresh_token&refresh_token=");
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138 http_url_escape_param(payload, input->token);
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139 str_append(payload, "&client_id=");
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140 http_url_escape_param(payload, req->set->client_id);
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141
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142 struct istream *is = i_stream_create_from_string(payload);
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143
21646
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144 if (url->user != NULL)
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145 http_client_request_set_auth_simple(req->req, url->user, url->password);
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146
21575
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147 http_client_request_add_header(req->req, "Content-Type",
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148 "application/x-www-form-urlencoded");
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149
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150 oauth2_request_set_headers(req, input);
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151
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152 http_client_request_set_payload(req->req, is, FALSE);
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153 i_stream_unref(&is);
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154 http_client_request_set_timeout_msecs(req->req,
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155 req->set->timeout_msecs);
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156 http_client_request_submit(req->req);
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157
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158 return req;
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159 }