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215db086e0
... in most cases instead of 'struct connectdata *' but in some cases in addition to. - We mostly operate on transfers and not connections. - We need the transfer handle to log, store data and more. Everything in libcurl is driven by a transfer (the CURL * in the public API). - This work clarifies and separates the transfers from the connections better. - We should avoid "conn->data". Since individual connections can be used by many transfers when multiplexing, making sure that conn->data points to the current and correct transfer at all times is difficult and has been notoriously error-prone over the years. The goal is to ultimately remove the conn->data pointer for this reason. Closes #6425
146 lines
5.4 KiB
C
146 lines
5.4 KiB
C
#ifndef HEADER_CURL_SASL_H
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#define HEADER_CURL_SASL_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2012 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include <curl/curl.h>
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struct Curl_easy;
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struct connectdata;
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/* Authentication mechanism flags */
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#define SASL_MECH_LOGIN (1 << 0)
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#define SASL_MECH_PLAIN (1 << 1)
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#define SASL_MECH_CRAM_MD5 (1 << 2)
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#define SASL_MECH_DIGEST_MD5 (1 << 3)
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#define SASL_MECH_GSSAPI (1 << 4)
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#define SASL_MECH_EXTERNAL (1 << 5)
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#define SASL_MECH_NTLM (1 << 6)
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#define SASL_MECH_XOAUTH2 (1 << 7)
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#define SASL_MECH_OAUTHBEARER (1 << 8)
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/* Authentication mechanism values */
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#define SASL_AUTH_NONE 0
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#define SASL_AUTH_ANY ~0U
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#define SASL_AUTH_DEFAULT (SASL_AUTH_ANY & ~SASL_MECH_EXTERNAL)
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/* Authentication mechanism strings */
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#define SASL_MECH_STRING_LOGIN "LOGIN"
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#define SASL_MECH_STRING_PLAIN "PLAIN"
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#define SASL_MECH_STRING_CRAM_MD5 "CRAM-MD5"
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#define SASL_MECH_STRING_DIGEST_MD5 "DIGEST-MD5"
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#define SASL_MECH_STRING_GSSAPI "GSSAPI"
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#define SASL_MECH_STRING_EXTERNAL "EXTERNAL"
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#define SASL_MECH_STRING_NTLM "NTLM"
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#define SASL_MECH_STRING_XOAUTH2 "XOAUTH2"
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#define SASL_MECH_STRING_OAUTHBEARER "OAUTHBEARER"
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/* SASL machine states */
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typedef enum {
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SASL_STOP,
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SASL_PLAIN,
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SASL_LOGIN,
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SASL_LOGIN_PASSWD,
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SASL_EXTERNAL,
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SASL_CRAMMD5,
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SASL_DIGESTMD5,
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SASL_DIGESTMD5_RESP,
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SASL_NTLM,
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SASL_NTLM_TYPE2MSG,
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SASL_GSSAPI,
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SASL_GSSAPI_TOKEN,
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SASL_GSSAPI_NO_DATA,
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SASL_OAUTH2,
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SASL_OAUTH2_RESP,
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SASL_CANCEL,
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SASL_FINAL
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} saslstate;
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/* Progress indicator */
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typedef enum {
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SASL_IDLE,
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SASL_INPROGRESS,
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SASL_DONE
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} saslprogress;
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/* Protocol dependent SASL parameters */
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struct SASLproto {
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const char *service; /* The service name */
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int contcode; /* Code to receive when continuation is expected */
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int finalcode; /* Code to receive upon authentication success */
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size_t maxirlen; /* Maximum initial response length */
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CURLcode (*sendauth)(struct Curl_easy *data,
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struct connectdata *conn,
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const char *mech, const char *ir);
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/* Send authentication command */
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CURLcode (*sendcont)(struct Curl_easy *data,
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struct connectdata *conn, const char *contauth);
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/* Send authentication continuation */
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void (*getmessage)(char *buffer, char **outptr);
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/* Get SASL response message */
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};
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/* Per-connection parameters */
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struct SASL {
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const struct SASLproto *params; /* Protocol dependent parameters */
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saslstate state; /* Current machine state */
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unsigned int authmechs; /* Accepted authentication mechanisms */
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unsigned int prefmech; /* Preferred authentication mechanism */
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unsigned int authused; /* Auth mechanism used for the connection */
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bool resetprefs; /* For URL auth option parsing. */
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bool mutual_auth; /* Mutual authentication enabled (GSSAPI only) */
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bool force_ir; /* Protocol always supports initial response */
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};
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/* This is used to test whether the line starts with the given mechanism */
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#define sasl_mech_equal(line, wordlen, mech) \
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(wordlen == (sizeof(mech) - 1) / sizeof(char) && \
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!memcmp(line, mech, wordlen))
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/* This is used to cleanup any libraries or curl modules used by the sasl
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functions */
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void Curl_sasl_cleanup(struct connectdata *conn, unsigned int authused);
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/* Convert a mechanism name to a token */
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unsigned int Curl_sasl_decode_mech(const char *ptr,
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size_t maxlen, size_t *len);
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/* Parse the URL login options */
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CURLcode Curl_sasl_parse_url_auth_option(struct SASL *sasl,
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const char *value, size_t len);
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/* Initializes an SASL structure */
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void Curl_sasl_init(struct SASL *sasl, const struct SASLproto *params);
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/* Check if we have enough auth data and capabilities to authenticate */
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bool Curl_sasl_can_authenticate(struct SASL *sasl, struct connectdata *conn);
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/* Calculate the required login details for SASL authentication */
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CURLcode Curl_sasl_start(struct SASL *sasl, struct connectdata *conn,
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bool force_ir, saslprogress *progress);
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/* Continue an SASL authentication */
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CURLcode Curl_sasl_continue(struct SASL *sasl, struct connectdata *conn,
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int code, saslprogress *progress);
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#endif /* HEADER_CURL_SASL_H */
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