thodg/libgit2/src/transports/auth.c

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• Hash : 10e8fe55
  Author :
  Date : 2019-03-21T13:55:54
  

  transports: add an `is_complete` function for auth Some authentication mechanisms (like HTTP Basic and Digest) have a one-step mechanism to create credentials, but there are more complex mechanisms like NTLM and Negotiate that require challenge/response after negotiation, requiring several round-trips. Add an `is_complete` function to know when they have round-tripped enough to be a single authentication and should now either have succeeded or failed to authenticate.

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• src/transports/auth.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "auth.h"
  
  #include "git2.h"
  #include "buffer.h"
  
  static int basic_next_token(
  	git_buf *out,
  	git_http_auth_context *ctx,
  	git_cred *c)
  {
  	git_cred_userpass_plaintext *cred;
  	git_buf raw = GIT_BUF_INIT;
  	int error = -1;
  
  	GIT_UNUSED(ctx);
  
  	if (c->credtype != GIT_CREDTYPE_USERPASS_PLAINTEXT) {
  		git_error_set(GIT_ERROR_INVALID, "invalid credential type for basic auth");
  		goto on_error;
  	}
  
  	cred = (git_cred_userpass_plaintext *)c;
  
  	git_buf_printf(&raw, "%s:%s", cred->username, cred->password);
  
  	if (git_buf_oom(&raw) ||
  		git_buf_puts(out, "Basic ") < 0 ||
  		git_buf_encode_base64(out, git_buf_cstr(&raw), raw.size) < 0)
  		goto on_error;
  
  	error = 0;
  
  on_error:
  	if (raw.size)
  		git__memzero(raw.ptr, raw.size);
  
  	git_buf_dispose(&raw);
  	return error;
  }
  
  static git_http_auth_context basic_context = {
  	GIT_AUTHTYPE_BASIC,
  	GIT_CREDTYPE_USERPASS_PLAINTEXT,
  	0,
  	NULL,
  	basic_next_token,
  	NULL,
  	NULL
  };
  
  int git_http_auth_basic(
  	git_http_auth_context **out, const git_net_url *url)
  {
  	GIT_UNUSED(url);
  
  	*out = &basic_context;
  	return 0;
  }
  
  int git_http_auth_dummy(
  	git_http_auth_context **out, const git_net_url *url)
  {
  	GIT_UNUSED(url);
  
  	*out = NULL;
  	return 0;
  }
  
  

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