diff options
Diffstat (limited to 'private/nw/svcdlls/nwwks/client/ccache.c')
| -rw-r--r-- | private/nw/svcdlls/nwwks/client/ccache.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/private/nw/svcdlls/nwwks/client/ccache.c b/private/nw/svcdlls/nwwks/client/ccache.c new file mode 100644 index 000000000..9374352fc --- /dev/null +++ b/private/nw/svcdlls/nwwks/client/ccache.c @@ -0,0 +1,324 @@ +/*++ + +Copyright (c) 1993 Microsoft Corporation + +Module Name: + + ccache.c + +Abstract: + + This module contains the code to keep a cache of the user + credentials. The cache is used mainly for a user browsing from + winfile. + +Author: + + Chuck Y Chan (chuckc) 4-Dec-93 + +Revision History: + + chuckc Created + +--*/ + +#include <nwclient.h> +#include <nwcanon.h> +#include <nwapi.h> + +//-------------------------------------------------------------------// +// // +// Local Function Prototypes // +// // +//-------------------------------------------------------------------// + +DWORD +ExtractServerName( + IN LPWSTR RemoteName, + OUT LPWSTR ServerName, + IN DWORD ServerNameSize +) ; + +//-------------------------------------------------------------------// +// // +// Global variables // +// // +//-------------------------------------------------------------------// + +static WCHAR CachedPassword[NW_MAX_PASSWORD_LEN+1] ; +static WCHAR CachedUserName[NW_MAX_USERNAME_LEN+1] ; +static WCHAR CachedServerName[NW_MAX_SERVER_LEN+1] ; +static DWORD CachedCredentialsTime ; +static UNICODE_STRING CachedPasswordUnicodeStr ; +static UCHAR EncodeSeed = 0 ; + +//-------------------------------------------------------------------// +// // +// Function Bodies // +// // +//-------------------------------------------------------------------// + +DWORD +NwpCacheCredentials( + IN LPWSTR RemoteName, + IN LPWSTR UserName, + IN LPWSTR Password + ) +/*++ + +Routine Description: + + This function caches the user credentials for the particular + server. + +Arguments: + + RemoteName - path containg the server we are accessing. only the + server component is of interest. + + UserName - user name to remember + + Password - password to remember + +Return Value: + + NO_ERROR - Successfully cached the credentials + + Win32 error code otherwise. + +--*/ +{ + DWORD status ; + + // + // various paramter checks + // + if (!RemoteName || !UserName || !Password) + { + status = ERROR_INVALID_PARAMETER ; + goto ExitPoint ; + } + + if (wcslen(UserName) >= sizeof(CachedUserName)/sizeof(CachedUserName[0])) + { + status = ERROR_INVALID_PARAMETER ; + goto ExitPoint ; + } + + if (wcslen(Password) >= sizeof(CachedPassword)/sizeof(CachedPassword[0])) + { + status = ERROR_INVALID_PARAMETER ; + goto ExitPoint ; + } + + // + // extract the server portion of the path + // + status = ExtractServerName( + RemoteName, + CachedServerName, + sizeof(CachedServerName)/sizeof(CachedServerName[0])) ; + + if (status != NO_ERROR) + { + goto ExitPoint ; + } + + // + // save away the credentials + // + wcscpy(CachedUserName, UserName) ; + wcscpy(CachedPassword, Password) ; + + // + // encode it since it is in page pool + // + RtlInitUnicodeString(&CachedPasswordUnicodeStr, CachedPassword) ; + RtlRunEncodeUnicodeString(&EncodeSeed, &CachedPasswordUnicodeStr) ; + + // + // mark the time this happened + // + CachedCredentialsTime = GetTickCount() ; + + return NO_ERROR ; + +ExitPoint: + + CachedServerName[0] = 0 ; + return status ; +} + + +BOOL +NwpRetrieveCachedCredentials( + IN LPWSTR RemoteName, + OUT LPWSTR *UserName, + OUT LPWSTR *Password + ) +/*++ + +Routine Description: + + This function retrieves the cached user credentials for the particular + server. + +Arguments: + + RemoteName - path containg the server we are accessing. only the + server component is of interest. + + UserName - used to return user name + + Password - used to return password + +Return Value: + + NO_ERROR - Successfully returned at least one entry. + + Win32 error code otherwise. + +--*/ +{ + DWORD status ; + DWORD CurrentTime ; + WCHAR ServerName[NW_MAX_SERVER_LEN+1] ; + + *UserName = NULL ; + *Password = NULL ; + CurrentTime = GetTickCount() ; + + if (!RemoteName) + { + return FALSE ; + } + + // + // if too old, bag out + // + if (((CurrentTime > CachedCredentialsTime) && + (CurrentTime - CachedCredentialsTime) > 60000) || + ((CurrentTime < CachedCredentialsTime) && + (CurrentTime + (MAXULONG - CachedCredentialsTime)) >= 60000)) + { + CachedServerName[0] = 0 ; // reset to nothing + return FALSE ; + } + + status = ExtractServerName( + RemoteName, + ServerName, + sizeof(ServerName)/sizeof(ServerName[0])) ; + + if (status != NO_ERROR) + { + return FALSE ; + } + + // + // if dont compare, bag out + // + if (_wcsicmp(ServerName, CachedServerName) != 0) + { + return FALSE ; + } + + // + // allocate memory to return data + // + if (!(*UserName = (LPWSTR) LocalAlloc( + LPTR, + (wcslen(CachedUserName)+1) * sizeof(WCHAR)))) + { + return FALSE ; + } + + if (!(*Password = (LPWSTR) LocalAlloc( + LPTR, + (wcslen(CachedPassword)+1) * sizeof(WCHAR)))) + { + LocalFree((HLOCAL)*UserName) ; + *UserName = NULL ; + return FALSE ; + } + + // + // decode the string,copy it and then reencode it + // + RtlRunDecodeUnicodeString(EncodeSeed, &CachedPasswordUnicodeStr) ; + wcscpy(*Password, CachedPassword) ; + RtlRunEncodeUnicodeString(&EncodeSeed, &CachedPasswordUnicodeStr) ; + + wcscpy(*UserName, CachedUserName) ; + + // + // update the tick count + // + CachedCredentialsTime = GetTickCount() ; + return TRUE ; +} + + +DWORD +ExtractServerName( + IN LPWSTR RemoteName, + OUT LPWSTR ServerName, + IN DWORD ServerNameSize +) +/*++ + +Routine Description: + + This function extracts the server name out of a remote name + +Arguments: + + RemoteName - the input string to extract the server name from. + + ServerName - the return buffer for the server string + + ServerNameSize - size o f buffer in chars + +Return Value: + + NO_ERROR - Successfully cached the credentials + + Win32 error code otherwise. + +--*/ +{ + LPWSTR ServerStart ; + LPWSTR ServerEnd ; + + // + // skip initial backslashes, then find next one delimiting the server name + // + ServerStart = RemoteName ; + + while (*ServerStart == L'\\') + ServerStart++ ; + + ServerEnd = wcschr(ServerStart, L'\\') ; + if (ServerEnd) + *ServerEnd = 0 ; + + // + // make sure we can fit + // + if (wcslen(ServerStart) >= ServerNameSize) + { + if (ServerEnd) + *ServerEnd = L'\\' ; + return ERROR_INVALID_PARAMETER ; + } + + // + // copy and restore the backslash + // + wcscpy(ServerName, ServerStart) ; + + if (ServerEnd) + *ServerEnd = L'\\' ; + + return NO_ERROR ; +} |