annotate nss/lib/certhigh/ocspt.h @ 2:a945361df361

Fix NSS_LIBRARIES variable
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 30 Jul 2014 16:20:44 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 /*
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6 * Public header for exported OCSP types.
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7 */
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8
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9 #ifndef _OCSPT_H_
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10 #define _OCSPT_H_
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11
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12 /*
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13 * The following are all opaque types. If someone needs to get at
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14 * a field within, then we need to fix the API. Try very hard not
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15 * make the type available to them.
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16 */
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17 typedef struct CERTOCSPRequestStr CERTOCSPRequest;
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18 typedef struct CERTOCSPResponseStr CERTOCSPResponse;
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19
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20 /*
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21 * XXX I think only those first two above should need to be exported,
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22 * but until I know for certain I am leaving the rest of these here, too.
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23 */
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24 typedef struct CERTOCSPCertIDStr CERTOCSPCertID;
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25 typedef struct CERTOCSPSingleResponseStr CERTOCSPSingleResponse;
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26
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27 /*
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28 * This interface is described in terms of an HttpClient which
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29 * supports at least a specified set of functions. (An implementer may
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30 * provide HttpClients with additional functionality accessible only to
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31 * users with a particular implementation in mind.) The basic behavior
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32 * is provided by defining a set of functions, listed in an
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33 * SEC_HttpServerFcnStruct. If the implementor of a SpecificHttpClient
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34 * registers his SpecificHttpClient as the default HttpClient, then his
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35 * functions will be called by the user of an HttpClient, such as an
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36 * OCSPChecker.
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37 *
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38 * The implementer of a specific HttpClient (e.g., the NSS-provided
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39 * DefaultHttpClient), populates an SEC_HttpClientFcnStruct, uses it to
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40 * register his client, and waits for his functions to be called.
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41 *
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42 * For future expandability, the SEC_HttpClientFcnStruct is defined as a
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43 * union, with the version field acting as a selector. The proposed
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44 * initial version of the structure is given following the definition
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45 * of the union. The HttpClientState structure is implementation-
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46 * dependent, and should be opaque to the user.
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47 */
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48
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49 typedef void * SEC_HTTP_SERVER_SESSION;
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50 typedef void * SEC_HTTP_REQUEST_SESSION;
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51
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52 /*
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53 * This function creates a SEC_HTTP_SERVER_SESSION object. The implementer of a
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54 * specific HttpClient will allocate the necessary space, when this
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55 * function is called, and will free it when the corresponding FreeFcn
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56 * is called. The SEC_HTTP_SERVER_SESSION object is passed, as an opaque object,
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57 * to subsequent calls.
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58 *
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59 * If the function returns SECSuccess, the returned SEC_HTTP_SERVER_SESSION
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60 * must be cleaned up with a call to SEC_HttpServer_FreeSession,
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61 * after processing is finished.
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62 */
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63 typedef SECStatus (*SEC_HttpServer_CreateSessionFcn)(
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64 const char *host,
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65 PRUint16 portnum,
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66 SEC_HTTP_SERVER_SESSION *pSession);
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67
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68 /*
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69 * This function is called to allow the implementation to attempt to keep
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70 * the connection alive. Depending on the underlying platform, it might
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71 * immediately return SECSuccess without having performed any operations.
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72 * (If a connection has not been kept alive, a subsequent call to
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73 * SEC_HttpRequest_TrySendAndReceiveFcn should reopen the connection
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74 * automatically.)
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75 *
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76 * If the connection uses nonblocking I/O, this function may return
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77 * SECWouldBlock and store a nonzero value at "pPollDesc". In that case
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78 * the caller may wait on the poll descriptor, and should call this function
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79 * again until SECSuccess (and a zero value at "pPollDesc") is obtained.
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80 */
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81 typedef SECStatus (*SEC_HttpServer_KeepAliveSessionFcn)(
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82 SEC_HTTP_SERVER_SESSION session,
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83 PRPollDesc **pPollDesc);
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84
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85 /*
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86 * This function frees the client SEC_HTTP_SERVER_SESSION object, closes all
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87 * SEC_HTTP_REQUEST_SESSIONs created for that server, discards all partial results,
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88 * frees any memory that was allocated by the client, and invalidates any
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89 * response pointers that might have been returned by prior server or request
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90 * functions.
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91 */
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92 typedef SECStatus (*SEC_HttpServer_FreeSessionFcn)(
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93 SEC_HTTP_SERVER_SESSION session);
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94
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95 /*
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96 * This function creates a SEC_HTTP_REQUEST_SESSION object. The implementer of a
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97 * specific HttpClient will allocate the necessary space, when this
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98 * function is called, and will free it when the corresponding FreeFcn
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99 * is called. The SEC_HTTP_REQUEST_SESSION object is passed, as an opaque object,
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100 * to subsequent calls.
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101 *
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102 * An implementation that does not support the requested protocol variant
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103 * (usually "http", but could eventually allow "https") or request method
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104 * should return SECFailure.
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105 *
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106 * Timeout values may include the constants PR_INTERVAL_NO_TIMEOUT (wait
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107 * forever) or PR_INTERVAL_NO_WAIT (nonblocking I/O).
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108 *
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109 * If the function returns SECSuccess, the returned SEC_HTTP_REQUEST_SESSION
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110 * must be cleaned up with a call to SEC_HttpRequest_FreeSession,
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111 * after processing is finished.
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112 */
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113 typedef SECStatus (*SEC_HttpRequest_CreateFcn)(
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114 SEC_HTTP_SERVER_SESSION session,
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115 const char *http_protocol_variant, /* usually "http" */
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116 const char *path_and_query_string,
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117 const char *http_request_method,
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118 const PRIntervalTime timeout,
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119 SEC_HTTP_REQUEST_SESSION *pRequest);
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120
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121 /*
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122 * This function sets data to be sent to the server for an HTTP request
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123 * of http_request_method == POST. If a particular implementation
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124 * supports it, the details for the POST request can be set by calling
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125 * this function, prior to activating the request with TrySendAndReceiveFcn.
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126 *
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127 * An implementation that does not support the POST method should
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128 * implement a SetPostDataFcn function that returns immediately.
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129 *
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130 * Setting http_content_type is optional, the parameter may
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131 * by NULL or the empty string.
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132 */
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133 typedef SECStatus (*SEC_HttpRequest_SetPostDataFcn)(
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134 SEC_HTTP_REQUEST_SESSION request,
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135 const char *http_data,
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136 const PRUint32 http_data_len,
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137 const char *http_content_type);
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138
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139 /*
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140 * This function sets an additional HTTP protocol request header.
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141 * If a particular implementation supports it, one or multiple headers
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142 * can be added to the request by calling this function once or multiple
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143 * times, prior to activating the request with TryFcn.
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144 *
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145 * An implementation that does not support setting additional headers
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146 * should implement an AddRequestHeaderFcn function that returns immediately.
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147 */
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148 typedef SECStatus (*SEC_HttpRequest_AddHeaderFcn)(
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149 SEC_HTTP_REQUEST_SESSION request,
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150 const char *http_header_name,
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151 const char *http_header_value);
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152
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153 /*
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154 * This function initiates or continues an HTTP request. After
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155 * parameters have been set with the Create function and, optionally,
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156 * modified or enhanced with the AddParams function, this call creates
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157 * the socket connection and initiates the communication.
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158 *
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159 * If a timeout value of zero is specified, indicating non-blocking
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160 * I/O, the client creates a non-blocking socket, and returns a status
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161 * of SECWouldBlock and a non-NULL PRPollDesc if the operation is not
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162 * complete. In that case all other return parameters are undefined.
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163 * The caller is expected to repeat the call, possibly after using
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164 * PRPoll to determine that a completion has occurred, until a return
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165 * value of SECSuccess (and a NULL value for pPollDesc) or a return
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166 * value of SECFailure (indicating failure on the network level)
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167 * is obtained.
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168 *
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169 * http_response_data_len is both input and output parameter.
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170 * If a pointer to a PRUint32 is supplied, the http client is
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171 * expected to check the given integer value and always set an out
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172 * value, even on failure.
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173 * An input value of zero means, the caller will accept any response len.
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174 * A different input value indicates the maximum response value acceptable
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175 * to the caller.
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176 * If data is successfully read and the size is acceptable to the caller,
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177 * the function will return SECSuccess and set http_response_data_len to
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178 * the size of the block returned in http_response_data.
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179 * If the data read from the http server is larger than the acceptable
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180 * size, the function will return SECFailure.
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181 * http_response_data_len will be set to a value different from zero to
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182 * indicate the reason of the failure.
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183 * An out value of "0" means, the failure was unrelated to the
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184 * acceptable size.
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185 * An out value of "1" means, the result data is larger than the
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186 * accpeptable size, but the real size is not yet known to the http client
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187 * implementation and it stopped retrieving it,
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188 * Any other out value combined with a return value of SECFailure
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189 * will indicate the actual size of the server data.
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190 *
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191 * The caller is permitted to provide NULL values for any of the
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192 * http_response arguments, indicating the caller is not interested in
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193 * those values. If the caller does provide an address, the HttpClient
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194 * stores at that address a pointer to the corresponding argument, at
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195 * the completion of the operation.
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196 *
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197 * All returned pointers will be owned by the the HttpClient
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198 * implementation and will remain valid until the call to
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199 * SEC_HttpRequest_FreeFcn.
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200 */
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201 typedef SECStatus (*SEC_HttpRequest_TrySendAndReceiveFcn)(
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202 SEC_HTTP_REQUEST_SESSION request,
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203 PRPollDesc **pPollDesc,
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204 PRUint16 *http_response_code,
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205 const char **http_response_content_type,
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206 const char **http_response_headers,
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207 const char **http_response_data,
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208 PRUint32 *http_response_data_len);
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209
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210 /*
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211 * Calling CancelFcn asks for premature termination of the request.
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212 *
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213 * Future calls to SEC_HttpRequest_TrySendAndReceive should
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214 * by avoided, but in this case the HttpClient implementation
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215 * is expected to return immediately with SECFailure.
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216 *
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217 * After calling CancelFcn, a separate call to SEC_HttpRequest_FreeFcn
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218 * is still necessary to free resources.
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219 */
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220 typedef SECStatus (*SEC_HttpRequest_CancelFcn)(
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221 SEC_HTTP_REQUEST_SESSION request);
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222
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223 /*
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224 * Before calling this function, it must be assured the request
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225 * has been completed, i.e. either SEC_HttpRequest_TrySendAndReceiveFcn has
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226 * returned SECSuccess, or the request has been canceled with
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227 * a call to SEC_HttpRequest_CancelFcn.
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228 *
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229 * This function frees the client state object, closes all sockets,
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230 * discards all partial results, frees any memory that was allocated
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231 * by the client, and invalidates all response pointers that might
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232 * have been returned by SEC_HttpRequest_TrySendAndReceiveFcn
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233 */
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234 typedef SECStatus (*SEC_HttpRequest_FreeFcn)(
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235 SEC_HTTP_REQUEST_SESSION request);
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236
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237 typedef struct SEC_HttpClientFcnV1Struct {
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238 SEC_HttpServer_CreateSessionFcn createSessionFcn;
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239 SEC_HttpServer_KeepAliveSessionFcn keepAliveSessionFcn;
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240 SEC_HttpServer_FreeSessionFcn freeSessionFcn;
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241 SEC_HttpRequest_CreateFcn createFcn;
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242 SEC_HttpRequest_SetPostDataFcn setPostDataFcn;
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243 SEC_HttpRequest_AddHeaderFcn addHeaderFcn;
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244 SEC_HttpRequest_TrySendAndReceiveFcn trySendAndReceiveFcn;
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245 SEC_HttpRequest_CancelFcn cancelFcn;
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246 SEC_HttpRequest_FreeFcn freeFcn;
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247 } SEC_HttpClientFcnV1;
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248
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249 typedef struct SEC_HttpClientFcnStruct {
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250 PRInt16 version;
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251 union {
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252 SEC_HttpClientFcnV1 ftable1;
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253 /* SEC_HttpClientFcnV2 ftable2; */
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254 /* ... */
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255 } fcnTable;
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256 } SEC_HttpClientFcn;
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257
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258 /*
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259 * ocspMode_FailureIsVerificationFailure:
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260 * This is the classic behaviour of NSS.
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261 * Any OCSP failure is a verification failure (classic mode, default).
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262 * Without a good response, OCSP networking will be retried each time
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263 * it is required for verifying a cert.
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264 *
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265 * ocspMode_FailureIsNotAVerificationFailure:
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266 * If we fail to obtain a valid OCSP response, consider the
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267 * cert as good.
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268 * Failed OCSP attempts might get cached and not retried until
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269 * minimumSecondsToNextFetchAttempt.
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270 * If we are able to obtain a valid response, the cert
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271 * will be considered good, if either status is "good"
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272 * or the cert was not yet revoked at verification time.
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273 *
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274 * Additional failure modes might be added in the future.
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275 */
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276 typedef enum {
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277 ocspMode_FailureIsVerificationFailure = 0,
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278 ocspMode_FailureIsNotAVerificationFailure = 1
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279 } SEC_OcspFailureMode;
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280
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281 /*
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282 * A ResponderID identifies the responder -- or more correctly, the
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283 * signer of the response. The ASN.1 definition of a ResponderID is:
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284 *
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285 * ResponderID ::= CHOICE {
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286 * byName [1] EXPLICIT Name,
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287 * byKey [2] EXPLICIT KeyHash }
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288 *
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289 * Because it is CHOICE, the type of identification used and the
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290 * identification itself are actually encoded together. To represent
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291 * this same information internally, we explicitly define a type and
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292 * save it, along with the value, into a data structure.
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293 */
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294
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295 typedef enum {
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296 ocspResponderID_other = -1, /* unknown kind of responderID */
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297 ocspResponderID_byName = 1,
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298 ocspResponderID_byKey = 2
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299 } CERTOCSPResponderIDType;
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300
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301 #endif /* _OCSPT_H_ */
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