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3e2c1dcda8
Capabilities of sasl module are extended to exchange messages in binary as an alternative to base64. If http authentication flags have been set, those are used as sasl default preferred mechanisms. Closes #6930
164 lines
6.3 KiB
C
164 lines
6.3 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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#include "bufref.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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#define SASL_MECH_SCRAM_SHA_1 (1 << 9)
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#define SASL_MECH_SCRAM_SHA_256 (1 << 10)
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/* Authentication mechanism values */
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#define SASL_AUTH_NONE 0
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#define SASL_AUTH_ANY 0xffff
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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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#define SASL_MECH_STRING_SCRAM_SHA_1 "SCRAM-SHA-1"
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#define SASL_MECH_STRING_SCRAM_SHA_256 "SCRAM-SHA-256"
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/* SASL flags */
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#define SASL_FLAG_BASE64 0x0001 /* Messages are base64-encoded */
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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_GSASL,
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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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CURLcode (*sendauth)(struct Curl_easy *data, const char *mech,
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const struct bufref *ir);
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/* Send authentication command */
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CURLcode (*contauth)(struct Curl_easy *data, const char *mech,
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const struct bufref *contauth);
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/* Send authentication continuation */
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CURLcode (*cancelauth)(struct Curl_easy *data, const char *mech);
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/* Cancel authentication. */
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CURLcode (*getmessage)(struct Curl_easy *data, struct bufref *out);
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/* Get SASL response message */
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size_t maxirlen; /* Maximum initial response + mechanism length,
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or zero if no max. This is normally the max
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command length - other characters count.
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This has to be zero for non-base64 protocols. */
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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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unsigned short defmechs; /* Mechanisms enabled by default */
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unsigned short flags; /* Configuration flags. */
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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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const char *curmech; /* Current mechanism id. */
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unsigned short authmechs; /* Accepted authentication mechanisms */
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unsigned short prefmech; /* Preferred authentication mechanism */
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unsigned short 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 short authused);
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/* Convert a mechanism name to a token */
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unsigned short 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, struct Curl_easy *data,
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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 Curl_easy *data,
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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 Curl_easy *data,
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int code, saslprogress *progress);
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#endif /* HEADER_CURL_SASL_H */
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