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/*
* ssl_server_trust_providers.c: providers for
* SVN_AUTH_CRED_SSL_SERVER_TRUST
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
#include <apr_pools.h>
#include "svn_hash.h"
#include "svn_auth.h"
#include "svn_error.h"
#include "svn_config.h"
#include "svn_string.h"
/*-----------------------------------------------------------------------*/
/* File provider */
/*-----------------------------------------------------------------------*/
/* The keys that will be stored on disk. These serve the same role as
similar constants in other providers. */
#define AUTHN_ASCII_CERT_KEY "ascii_cert"
#define AUTHN_FAILURES_KEY "failures"
/* retrieve ssl server CA failure overrides (if any) from servers
config */
static svn_error_t *
ssl_server_trust_file_first_credentials(void **credentials,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
apr_uint32_t *failures = svn_hash_gets(parameters,
SVN_AUTH_PARAM_SSL_SERVER_FAILURES);
const svn_auth_ssl_server_cert_info_t *cert_info =
svn_hash_gets(parameters, SVN_AUTH_PARAM_SSL_SERVER_CERT_INFO);
apr_hash_t *creds_hash = NULL;
const char *config_dir;
svn_error_t *error = SVN_NO_ERROR;
*credentials = NULL;
*iter_baton = NULL;
/* Check if this is a permanently accepted certificate */
config_dir = svn_hash_gets(parameters, SVN_AUTH_PARAM_CONFIG_DIR);
error =
svn_config_read_auth_data(&creds_hash, SVN_AUTH_CRED_SSL_SERVER_TRUST,
realmstring, config_dir, pool);
svn_error_clear(error);
if (! error && creds_hash)
{
svn_string_t *trusted_cert, *this_cert, *failstr;
apr_uint32_t last_failures = 0;
trusted_cert = svn_hash_gets(creds_hash, AUTHN_ASCII_CERT_KEY);
this_cert = svn_string_create(cert_info->ascii_cert, pool);
failstr = svn_hash_gets(creds_hash, AUTHN_FAILURES_KEY);
if (failstr)
{
char *endptr;
unsigned long tmp_ulong = strtoul(failstr->data, &endptr, 10);
if (*endptr == '\0')
last_failures = (apr_uint32_t) tmp_ulong;
}
/* If the cert is trusted and there are no new failures, we
* accept it by clearing all failures. */
if (trusted_cert &&
svn_string_compare(this_cert, trusted_cert) &&
(*failures & ~last_failures) == 0)
{
*failures = 0;
}
}
/* If all failures are cleared now, we return the creds */
if (! *failures)
{
svn_auth_cred_ssl_server_trust_t *creds =
apr_pcalloc(pool, sizeof(*creds));
creds->may_save = FALSE; /* No need to save it again... */
*credentials = creds;
}
return SVN_NO_ERROR;
}
static svn_error_t *
ssl_server_trust_file_save_credentials(svn_boolean_t *saved,
void *credentials,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
svn_auth_cred_ssl_server_trust_t *creds = credentials;
const svn_auth_ssl_server_cert_info_t *cert_info;
apr_hash_t *creds_hash = NULL;
const char *config_dir;
if (! creds->may_save)
return SVN_NO_ERROR;
config_dir = svn_hash_gets(parameters, SVN_AUTH_PARAM_CONFIG_DIR);
cert_info = svn_hash_gets(parameters, SVN_AUTH_PARAM_SSL_SERVER_CERT_INFO);
creds_hash = apr_hash_make(pool);
svn_hash_sets(creds_hash, AUTHN_ASCII_CERT_KEY,
svn_string_create(cert_info->ascii_cert, pool));
svn_hash_sets(creds_hash,
AUTHN_FAILURES_KEY,
svn_string_createf(pool, "%lu",
(unsigned long)creds->accepted_failures));
SVN_ERR(svn_config_write_auth_data(creds_hash,
SVN_AUTH_CRED_SSL_SERVER_TRUST,
realmstring,
config_dir,
pool));
*saved = TRUE;
return SVN_NO_ERROR;
}
static const svn_auth_provider_t ssl_server_trust_file_provider = {
SVN_AUTH_CRED_SSL_SERVER_TRUST,
&ssl_server_trust_file_first_credentials,
NULL,
&ssl_server_trust_file_save_credentials,
};
/*** Public API to SSL file providers. ***/
void
svn_auth_get_ssl_server_trust_file_provider
(svn_auth_provider_object_t **provider, apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
po->vtable = &ssl_server_trust_file_provider;
*provider = po;
}
/*-----------------------------------------------------------------------*/
/* Prompt provider */
/*-----------------------------------------------------------------------*/
/* Baton type for prompting to verify server ssl creds.
There is no iteration baton type. */
typedef struct ssl_server_trust_prompt_provider_baton_t
{
svn_auth_ssl_server_trust_prompt_func_t prompt_func;
void *prompt_baton;
} ssl_server_trust_prompt_provider_baton_t;
static svn_error_t *
ssl_server_trust_prompt_first_cred(void **credentials_p,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
ssl_server_trust_prompt_provider_baton_t *pb = provider_baton;
apr_uint32_t *failures = svn_hash_gets(parameters,
SVN_AUTH_PARAM_SSL_SERVER_FAILURES);
const char *no_auth_cache = svn_hash_gets(parameters,
SVN_AUTH_PARAM_NO_AUTH_CACHE);
const svn_auth_ssl_server_cert_info_t *cert_info =
svn_hash_gets(parameters, SVN_AUTH_PARAM_SSL_SERVER_CERT_INFO);
svn_boolean_t may_save = (!no_auth_cache
&& !(*failures & SVN_AUTH_SSL_OTHER));
SVN_ERR(pb->prompt_func((svn_auth_cred_ssl_server_trust_t **)credentials_p,
pb->prompt_baton, realmstring, *failures, cert_info,
may_save, pool));
*iter_baton = NULL;
return SVN_NO_ERROR;
}
static const svn_auth_provider_t ssl_server_trust_prompt_provider = {
SVN_AUTH_CRED_SSL_SERVER_TRUST,
ssl_server_trust_prompt_first_cred,
NULL,
NULL
};
/*** Public API to SSL prompting providers. ***/
void
svn_auth_get_ssl_server_trust_prompt_provider
(svn_auth_provider_object_t **provider,
svn_auth_ssl_server_trust_prompt_func_t prompt_func,
void *prompt_baton,
apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
ssl_server_trust_prompt_provider_baton_t *pb =
apr_palloc(pool, sizeof(*pb));
pb->prompt_func = prompt_func;
pb->prompt_baton = prompt_baton;
po->vtable = &ssl_server_trust_prompt_provider;
po->provider_baton = pb;
*provider = po;
}
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