simple_providers.c [plain text]
#include <apr_pools.h>
#include "svn_auth.h"
#include "svn_error.h"
#include "svn_utf.h"
#include "svn_config.h"
#include "svn_user.h"
#include "svn_private_config.h"
#define SVN_AUTH__AUTHFILE_USERNAME_KEY "username"
#define SVN_AUTH__AUTHFILE_PASSWORD_KEY "password"
#define SVN_AUTH__AUTHFILE_PASSTYPE_KEY "passtype"
#define SVN_AUTH__SIMPLE_PASSWORD_TYPE "simple"
#define SVN_AUTH__WINCRYPT_PASSWORD_TYPE "wincrypt"
#define SVN_AUTH__KEYCHAIN_PASSWORD_TYPE "keychain"
typedef svn_boolean_t (*password_set_t)(apr_hash_t *creds,
const char *realmstring,
const char *username,
const char *password,
svn_boolean_t non_interactive,
apr_pool_t *pool);
typedef svn_boolean_t (*password_get_t)(const char **password,
apr_hash_t *creds,
const char *realmstring,
const char *username,
svn_boolean_t non_interactive,
apr_pool_t *pool);
static svn_boolean_t
simple_password_get(const char **password,
apr_hash_t *creds,
const char *realmstring,
const char *username,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
svn_string_t *str;
str = apr_hash_get(creds, SVN_AUTH__AUTHFILE_PASSWORD_KEY,
APR_HASH_KEY_STRING);
if (str && str->data)
{
*password = str->data;
return TRUE;
}
return FALSE;
}
static svn_boolean_t
simple_password_set(apr_hash_t *creds,
const char *realmstring,
const char *username,
const char *password,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
apr_hash_set(creds, SVN_AUTH__AUTHFILE_PASSWORD_KEY, APR_HASH_KEY_STRING,
svn_string_create(password, pool));
return TRUE;
}
static svn_error_t *
simple_first_creds_helper(void **credentials,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
password_get_t password_get,
const char *passtype,
apr_pool_t *pool)
{
const char *config_dir = apr_hash_get(parameters,
SVN_AUTH_PARAM_CONFIG_DIR,
APR_HASH_KEY_STRING);
const char *username = apr_hash_get(parameters,
SVN_AUTH_PARAM_DEFAULT_USERNAME,
APR_HASH_KEY_STRING);
const char *password = apr_hash_get(parameters,
SVN_AUTH_PARAM_DEFAULT_PASSWORD,
APR_HASH_KEY_STRING);
svn_boolean_t non_interactive = apr_hash_get(parameters,
SVN_AUTH_PARAM_NON_INTERACTIVE,
APR_HASH_KEY_STRING) != NULL;
svn_boolean_t may_save = username || password;
svn_error_t *err;
if (! (username && password))
{
apr_hash_t *creds_hash = NULL;
err = svn_config_read_auth_data(&creds_hash, SVN_AUTH_CRED_SIMPLE,
realmstring, config_dir, pool);
svn_error_clear(err);
if (! err && creds_hash)
{
svn_string_t *str;
if (! username)
{
str = apr_hash_get(creds_hash,
SVN_AUTH__AUTHFILE_USERNAME_KEY,
APR_HASH_KEY_STRING);
if (str && str->data)
username = str->data;
}
if (! password)
{
svn_boolean_t have_passtype;
str = apr_hash_get(creds_hash,
SVN_AUTH__AUTHFILE_PASSTYPE_KEY,
APR_HASH_KEY_STRING);
have_passtype = (str && str->data);
if (have_passtype && passtype
&& 0 != strcmp(str->data, passtype))
password = NULL;
else
{
if (!password_get(&password, creds_hash, realmstring,
username, non_interactive, pool))
password = NULL;
if (password && passtype && !have_passtype)
may_save = TRUE;
}
}
}
}
if (password && ! username)
username = svn_user_get_name(pool);
if (username && password)
{
svn_auth_cred_simple_t *creds = apr_pcalloc(pool, sizeof(*creds));
creds->username = username;
creds->password = password;
creds->may_save = may_save;
*credentials = creds;
}
else
*credentials = NULL;
*iter_baton = NULL;
return SVN_NO_ERROR;
}
static svn_error_t *
simple_save_creds_helper(svn_boolean_t *saved,
void *credentials,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
password_set_t password_set,
const char *passtype,
apr_pool_t *pool)
{
svn_auth_cred_simple_t *creds = credentials;
apr_hash_t *creds_hash = NULL;
const char *config_dir;
svn_error_t *err;
const char *dont_store_passwords =
apr_hash_get(parameters,
SVN_AUTH_PARAM_DONT_STORE_PASSWORDS,
APR_HASH_KEY_STRING);
svn_boolean_t non_interactive = apr_hash_get(parameters,
SVN_AUTH_PARAM_NON_INTERACTIVE,
APR_HASH_KEY_STRING) != NULL;
svn_boolean_t password_stored = TRUE;
*saved = FALSE;
if (! creds->may_save)
return SVN_NO_ERROR;
config_dir = apr_hash_get(parameters,
SVN_AUTH_PARAM_CONFIG_DIR,
APR_HASH_KEY_STRING);
creds_hash = apr_hash_make(pool);
apr_hash_set(creds_hash, SVN_AUTH__AUTHFILE_USERNAME_KEY,
APR_HASH_KEY_STRING,
svn_string_create(creds->username, pool));
if (! dont_store_passwords)
{
password_stored = password_set(creds_hash, realmstring, creds->username,
creds->password, non_interactive, pool);
if (password_stored)
{
if (passtype)
{
apr_hash_set(creds_hash, SVN_AUTH__AUTHFILE_PASSTYPE_KEY,
APR_HASH_KEY_STRING,
svn_string_create(passtype, pool));
}
}
else
*saved = FALSE;
}
if (password_stored)
{
err = svn_config_write_auth_data(creds_hash, SVN_AUTH_CRED_SIMPLE,
realmstring, config_dir, pool);
svn_error_clear(err);
*saved = ! err;
}
return SVN_NO_ERROR;
}
static svn_error_t *
simple_first_creds(void **credentials,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_first_creds_helper(credentials,
iter_baton, provider_baton,
parameters, realmstring,
simple_password_get,
SVN_AUTH__SIMPLE_PASSWORD_TYPE,
pool);
}
static svn_error_t *
simple_save_creds(svn_boolean_t *saved,
void *credentials,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_save_creds_helper(saved, credentials, provider_baton,
parameters, realmstring,
simple_password_set,
SVN_AUTH__SIMPLE_PASSWORD_TYPE,
pool);
}
static const svn_auth_provider_t simple_provider = {
SVN_AUTH_CRED_SIMPLE,
simple_first_creds,
NULL,
simple_save_creds
};
void
svn_auth_get_simple_provider(svn_auth_provider_object_t **provider,
apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
po->vtable = &simple_provider;
*provider = po;
}
typedef struct
{
svn_auth_simple_prompt_func_t prompt_func;
void *prompt_baton;
int retry_limit;
} simple_prompt_provider_baton_t;
typedef struct
{
int retries;
} simple_prompt_iter_baton_t;
static svn_error_t *
prompt_for_simple_creds(svn_auth_cred_simple_t **cred_p,
simple_prompt_provider_baton_t *pb,
apr_hash_t *parameters,
const char *realmstring,
svn_boolean_t first_time,
svn_boolean_t may_save,
apr_pool_t *pool)
{
const char *def_username = NULL, *def_password = NULL;
*cred_p = NULL;
if (first_time)
{
def_username = apr_hash_get(parameters,
SVN_AUTH_PARAM_DEFAULT_USERNAME,
APR_HASH_KEY_STRING);
if (! def_username)
{
const char *config_dir = apr_hash_get(parameters,
SVN_AUTH_PARAM_CONFIG_DIR,
APR_HASH_KEY_STRING);
apr_hash_t *creds_hash = NULL;
svn_string_t *str;
svn_error_t *err;
err = svn_config_read_auth_data(&creds_hash, SVN_AUTH_CRED_SIMPLE,
realmstring, config_dir, pool);
svn_error_clear(err);
if (! err && creds_hash)
{
str = apr_hash_get(creds_hash,
SVN_AUTH__AUTHFILE_USERNAME_KEY,
APR_HASH_KEY_STRING);
if (str && str->data)
def_username = str->data;
}
}
if (! def_username)
def_username = svn_user_get_name(pool);
def_password = apr_hash_get(parameters,
SVN_AUTH_PARAM_DEFAULT_PASSWORD,
APR_HASH_KEY_STRING);
}
if (def_username && def_password)
{
*cred_p = apr_palloc(pool, sizeof(**cred_p));
(*cred_p)->username = apr_pstrdup(pool, def_username);
(*cred_p)->password = apr_pstrdup(pool, def_password);
(*cred_p)->may_save = TRUE;
}
else
{
SVN_ERR(pb->prompt_func(cred_p, pb->prompt_baton, realmstring,
def_username, may_save, pool));
}
return SVN_NO_ERROR;
}
static svn_error_t *
simple_prompt_first_creds(void **credentials_p,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
simple_prompt_provider_baton_t *pb = provider_baton;
simple_prompt_iter_baton_t *ibaton = apr_pcalloc(pool, sizeof(*ibaton));
const char *no_auth_cache = apr_hash_get(parameters,
SVN_AUTH_PARAM_NO_AUTH_CACHE,
APR_HASH_KEY_STRING);
SVN_ERR(prompt_for_simple_creds((svn_auth_cred_simple_t **) credentials_p,
pb, parameters, realmstring, TRUE,
! no_auth_cache, pool));
ibaton->retries = 0;
*iter_baton = ibaton;
return SVN_NO_ERROR;
}
static svn_error_t *
simple_prompt_next_creds(void **credentials_p,
void *iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
simple_prompt_iter_baton_t *ib = iter_baton;
simple_prompt_provider_baton_t *pb = provider_baton;
const char *no_auth_cache = apr_hash_get(parameters,
SVN_AUTH_PARAM_NO_AUTH_CACHE,
APR_HASH_KEY_STRING);
if (ib->retries >= pb->retry_limit)
{
*credentials_p = NULL;
return SVN_NO_ERROR;
}
ib->retries++;
SVN_ERR(prompt_for_simple_creds((svn_auth_cred_simple_t **) credentials_p,
pb, parameters, realmstring, FALSE,
! no_auth_cache, pool));
return SVN_NO_ERROR;
}
static const svn_auth_provider_t simple_prompt_provider = {
SVN_AUTH_CRED_SIMPLE,
simple_prompt_first_creds,
simple_prompt_next_creds,
NULL,
};
void
svn_auth_get_simple_prompt_provider
(svn_auth_provider_object_t **provider,
svn_auth_simple_prompt_func_t prompt_func,
void *prompt_baton,
int retry_limit,
apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
simple_prompt_provider_baton_t *pb = apr_pcalloc(pool, sizeof(*pb));
pb->prompt_func = prompt_func;
pb->prompt_baton = prompt_baton;
pb->retry_limit = retry_limit;
po->vtable = &simple_prompt_provider;
po->provider_baton = pb;
*provider = po;
}
#ifdef WIN32
#include <wincrypt.h>
#include <apr_base64.h>
static const WCHAR description[] = L"auth_svn.simple.wincrypt";
static const char windows_crypto_type[] = "wincrypt";
static svn_boolean_t
get_crypto_function(const char *name, HINSTANCE *pdll, FARPROC *pfn)
{
HINSTANCE dll = LoadLibraryA("Crypt32.dll");
if (dll)
{
FARPROC fn = GetProcAddress(dll, name);
if (fn)
{
*pdll = dll;
*pfn = fn;
return TRUE;
}
FreeLibrary(dll);
}
return FALSE;
}
static svn_boolean_t
windows_password_encrypter(apr_hash_t *creds,
const char *realmstring,
const char *username,
const char *in,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
typedef BOOL (CALLBACK *encrypt_fn_t)
(DATA_BLOB *,
LPCWSTR,
DATA_BLOB *,
PVOID,
CRYPTPROTECT_PROMPTSTRUCT*,
DWORD,
DATA_BLOB*);
HINSTANCE dll;
FARPROC fn;
encrypt_fn_t encrypt;
DATA_BLOB blobin;
DATA_BLOB blobout;
svn_boolean_t crypted;
if (!get_crypto_function("CryptProtectData", &dll, &fn))
return FALSE;
encrypt = (encrypt_fn_t) fn;
blobin.cbData = strlen(in);
blobin.pbData = (BYTE*) in;
crypted = encrypt(&blobin, description, NULL, NULL, NULL,
CRYPTPROTECT_UI_FORBIDDEN, &blobout);
if (crypted)
{
char *coded = apr_palloc(pool, apr_base64_encode_len(blobout.cbData));
apr_base64_encode(coded, blobout.pbData, blobout.cbData);
crypted = simple_password_set(creds, realmstring, username, coded,
non_interactive, pool);
LocalFree(blobout.pbData);
}
FreeLibrary(dll);
return crypted;
}
static svn_boolean_t
windows_password_decrypter(const char **out,
apr_hash_t *creds,
const char *realmstring,
const char *username,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
typedef BOOL (CALLBACK * decrypt_fn_t)
(DATA_BLOB *,
LPWSTR *,
DATA_BLOB *,
PVOID,
CRYPTPROTECT_PROMPTSTRUCT*,
DWORD,
DATA_BLOB*);
HINSTANCE dll;
FARPROC fn;
DATA_BLOB blobin;
DATA_BLOB blobout;
LPWSTR descr;
decrypt_fn_t decrypt;
svn_boolean_t decrypted;
char *in;
if (!simple_password_get(&in, creds, realmstring, username,
non_interactive, pool))
return FALSE;
if (!get_crypto_function("CryptUnprotectData", &dll, &fn))
return FALSE;
decrypt = (decrypt_fn_t) fn;
blobin.cbData = strlen(in);
blobin.pbData = apr_palloc(pool, apr_base64_decode_len(in));
apr_base64_decode(blobin.pbData, in);
decrypted = decrypt(&blobin, &descr, NULL, NULL, NULL,
CRYPTPROTECT_UI_FORBIDDEN, &blobout);
if (decrypted)
{
if (0 == lstrcmpW(descr, description))
*out = apr_pstrndup(pool, blobout.pbData, blobout.cbData);
else
decrypted = FALSE;
LocalFree(blobout.pbData);
}
FreeLibrary(dll);
return decrypted;
}
static svn_error_t *
windows_simple_first_creds(void **credentials,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_first_creds_helper(credentials,
iter_baton, provider_baton,
parameters, realmstring,
windows_password_decrypter,
SVN_AUTH__WINCRYPT_PASSWORD_TYPE,
pool);
}
static svn_error_t *
windows_simple_save_creds(svn_boolean_t *saved,
void *credentials,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_save_creds_helper(saved, credentials, provider_baton,
parameters, realmstring,
windows_password_encrypter,
SVN_AUTH__WINCRYPT_PASSWORD_TYPE,
pool);
}
static const svn_auth_provider_t windows_simple_provider = {
SVN_AUTH_CRED_SIMPLE,
windows_simple_first_creds,
NULL,
windows_simple_save_creds
};
void
svn_auth_get_windows_simple_provider(svn_auth_provider_object_t **provider,
apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
po->vtable = &windows_simple_provider;
*provider = po;
}
#endif
#ifdef SVN_HAVE_KEYCHAIN_SERVICES
#include <Security/Security.h>
static svn_boolean_t
keychain_password_set(apr_hash_t *creds,
const char *realmstring,
const char *username,
const char *password,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
OSStatus status;
SecKeychainItemRef item;
if (non_interactive)
SecKeychainSetUserInteractionAllowed(FALSE);
status = SecKeychainFindGenericPassword(NULL, strlen(realmstring),
realmstring, strlen(username),
username, 0, NULL, &item);
if (status)
{
if (status == errSecItemNotFound)
status = SecKeychainAddGenericPassword(NULL, strlen(realmstring),
realmstring, strlen(username),
username, strlen(password),
password, NULL);
}
else
{
status = SecKeychainItemModifyAttributesAndData(item, NULL,
strlen(password),
password);
CFRelease(item);
}
if (non_interactive)
SecKeychainSetUserInteractionAllowed(TRUE);
return status == 0;
}
static svn_boolean_t
keychain_password_get(const char **password,
apr_hash_t *creds,
const char *realmstring,
const char *username,
svn_boolean_t non_interactive,
apr_pool_t *pool)
{
OSStatus status;
UInt32 length;
void *data;
if (non_interactive)
SecKeychainSetUserInteractionAllowed(FALSE);
status = SecKeychainFindGenericPassword(NULL, strlen(realmstring),
realmstring, strlen(username),
username, &length, &data, NULL);
if (non_interactive)
SecKeychainSetUserInteractionAllowed(TRUE);
if (status != 0)
return FALSE;
*password = apr_pstrmemdup(pool, data, length);
SecKeychainItemFreeContent(NULL, data);
return TRUE;
}
static svn_error_t *
keychain_simple_first_creds(void **credentials,
void **iter_baton,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_first_creds_helper(credentials,
iter_baton, provider_baton,
parameters, realmstring,
keychain_password_get,
SVN_AUTH__KEYCHAIN_PASSWORD_TYPE,
pool);
}
static svn_error_t *
keychain_simple_save_creds(svn_boolean_t *saved,
void *credentials,
void *provider_baton,
apr_hash_t *parameters,
const char *realmstring,
apr_pool_t *pool)
{
return simple_save_creds_helper(saved, credentials, provider_baton,
parameters, realmstring,
keychain_password_set,
SVN_AUTH__KEYCHAIN_PASSWORD_TYPE,
pool);
}
static const svn_auth_provider_t keychain_simple_provider = {
SVN_AUTH_CRED_SIMPLE,
keychain_simple_first_creds,
NULL,
keychain_simple_save_creds
};
void
svn_auth_get_keychain_simple_provider(svn_auth_provider_object_t **provider,
apr_pool_t *pool)
{
svn_auth_provider_object_t *po = apr_pcalloc(pool, sizeof(*po));
po->vtable = &keychain_simple_provider;
*provider = po;
}
#endif