* UCC (University [of WA] Computer Club) Electronic Accounting System
*
* cokebank.c - Coke-Bank management
+ * > Simple custom database format (uses PAM for usernames)
*
* This file is licenced under the 3-clause BSD Licence. See the file COPYING
* for full details.
#include <stdint.h>
#include <stdio.h>
#include <string.h>
+#include <string.h>
+#include <limits.h>
+#include <pwd.h>
+#include <grp.h>
#include <openssl/sha.h>
#include "common.h"
#if USE_LDAP
*
*/
-// === HACKS ===
+#define USE_UNIX_GROUPS 1
#define HACK_TPG_NOAUTH 1
#define HACK_ROOT_NOAUTH 1
+#define indexof(array, ent) (((intptr_t)(ent)-(intptr_t)(array))/sizeof((array)[0]))
+
+// === TYPES ===
+struct sAcctIterator
+{
+ int CurUser;
+
+ int Sort;
+
+ int MinBalance;
+ int MaxBalance;
+
+ int FlagMask;
+ int FlagValue;
+};
+
// === PROTOTYPES ===
-void Init_Cokebank(const char *Argument);
- int Transfer(int SourceUser, int DestUser, int Ammount, const char *Reason);
- int GetBalance(int User);
-char *GetUserName(int User);
- int GetUserID(const char *Username);
- int GetMaxID(void);
- int GetUserAuth(const char *Salt, const char *Username, const char *PasswordString);
+static int Bank_int_ReadDatabase(void);
+static int Bank_int_WriteEntry(int ID);
+ int Bank_int_AlterUserBalance(int ID, int Delta);
+ int Bank_int_GetMinAllowedBalance(int ID);
+ int Bank_int_AddUser(const char *Username);
+ int Bank_int_GetUnixID(const char *Username);
#if USE_LDAP
char *ReadLDAPValue(const char *Filter, char *Value);
#endif
char *gsLDAPPath = "ldapi:///";
LDAP *gpLDAP;
#endif
+tUser *gaBank_Users;
+ int giBank_NumUsers;
+FILE *gBank_File;
+tUser **gaBank_UsersByName;
+tUser **gaBank_UsersByBalance;
// === CODE ===
-/**
+/*
* \brief Load the cokebank database
*/
-void Init_Cokebank(const char *Argument)
+int Bank_Initialise(const char *Argument)
{
#if USE_LDAP
int rv;
// Open Cokebank
gBank_File = fopen(Argument, "rb+");
- if( !gBank_File ) {
- gBank_File = fopen(Argument, "wb+");
- }
+ if( !gBank_File ) gBank_File = fopen(Argument, "wb+");
if( !gBank_File ) {
perror("Opening coke bank");
+ return -1;
}
+ Bank_int_ReadDatabase();
// Open log file
// TODO: Do I need this?
gBank_LogFile = fopen("cokebank.log", "a");
if( !gBank_LogFile ) gBank_LogFile = stdout;
-
- // Read in cokebank
- fseek(gBank_File, 0, SEEK_END);
- giBank_NumUsers = ftell(gBank_File) / sizeof(gaBank_Users[0]);
- fseek(gBank_File, 0, SEEK_SET);
- gaBank_Users = malloc( giBank_NumUsers * sizeof(gaBank_Users[0]) );
- fread(gaBank_Users, sizeof(gaBank_Users[0]), giBank_NumUsers, gBank_File);
+
#if USE_LDAP
// Connect to LDAP
rv = ldap_create(&gpLDAP);
if(rv) {
fprintf(stderr, "ldap_create: %s\n", ldap_err2string(rv));
- exit(1);
+ return 1;
}
rv = ldap_initialize(&gpLDAP, gsLDAPPath);
if(rv) {
fprintf(stderr, "ldap_initialize: %s\n", ldap_err2string(rv));
- exit(1);
+ return 1;
}
{ int ver = LDAP_VERSION3; ldap_set_option(gpLDAP, LDAP_OPT_PROTOCOL_VERSION, &ver); }
# if 0
rv = ldap_start_tls_s(gpLDAP, NULL, NULL);
if(rv) {
fprintf(stderr, "ldap_start_tls_s: %s\n", ldap_err2string(rv));
- exit(1);
+ return 1;
}
# endif
{
struct berval *servcred;
cred.bv_val = "secret";
cred.bv_len = 6;
- rv = ldap_sasl_bind_s(gpLDAP, "cn=root,dc=ucc,dc=gu,dc=uwa,dc=edu,dc=au",
+ rv = ldap_sasl_bind_s(gpLDAP, "cn=admin,dc=ucc,dc=gu,dc=uwa,dc=edu,dc=au",
"", &cred, NULL, NULL, &servcred);
if(rv) {
fprintf(stderr, "ldap_start_tls_s: %s\n", ldap_err2string(rv));
- exit(1);
+ return 1;
}
}
#endif
+
+ return 0;
+}
+
+/**
+ * \brief Name compare function for qsort
+ */
+static int Bank_int_CompareNames(const void *Ent1, const void *Ent2)
+{
+ const tUser *user1 = *(const tUser**)Ent1;
+ const tUser *user2 = *(const tUser**)Ent2;
+
+ return strcmp(user1->Name, user2->Name);
}
/**
- * \brief Transfers money from one user to another
+ * \brief Name compare function for qsort
+ */
+static int Bank_int_CompareBalance(const void *Ent1, const void *Ent2)
+{
+ const tUser *user1 = *(const tUser**)Ent1;
+ const tUser *user2 = *(const tUser**)Ent2;
+
+ return user1->Balance - user2->Balance;
+}
+
+#if 1
+static int Bank_int_ReadDatabase(void)
+{
+ int i;
+ if( gaBank_Users ) return 1;
+
+ // Get size
+ fseek(gBank_File, 0, SEEK_END);
+ giBank_NumUsers = ftell(gBank_File) / sizeof(tFileUser);
+ fseek(gBank_File, 0, SEEK_SET);
+
+ // Allocate structures
+ gaBank_Users = malloc( giBank_NumUsers * sizeof(tUser) );
+ gaBank_UsersByName = malloc( giBank_NumUsers * sizeof(tUser*) );
+ gaBank_UsersByBalance = malloc( giBank_NumUsers * sizeof(tUser*) );
+ // Read data
+ for( i = 0; i < giBank_NumUsers; i ++ )
+ {
+ tFileUser fu;
+ fread(&fu, sizeof(tFileUser), 1, gBank_File);
+ gaBank_Users[i].Name = NULL;
+ gaBank_Users[i].UnixID = fu.UnixID;
+ gaBank_Users[i].Balance = fu.Balance;
+ gaBank_Users[i].Flags = fu.Flags;
+ gaBank_Users[i].Name = Bank_GetAcctName(i);
+ gaBank_UsersByName[i] = &gaBank_Users[i]; // Add to name index
+ gaBank_UsersByBalance[i] = &gaBank_Users[i]; // Add to balance index
+ }
+
+ // Sort indexes
+ qsort(gaBank_UsersByName, giBank_NumUsers, sizeof(tUser*), Bank_int_CompareNames);
+ qsort(gaBank_UsersByBalance, giBank_NumUsers, sizeof(tUser*), Bank_int_CompareBalance);
+
+ return 0;
+}
+#else
+static int Bank_int_ReadDatabase(void)
+{
+ char buf[BUFSIZ];
+ // Alternate data format
+ // > Plain Text
+ // <username>,<uid>,<pin>,<lastused>,<balance>,<flags>,<altlogins...>
+ fseek(gBank_File, 0, SEEK_SET);
+
+ while(1)
+ {
+ fgets(buf, BUFSIZ-1, gBank_File);
+ }
+}
+#endif
+
+static int Bank_int_WriteEntry(int ID)
+{
+ tFileUser fu;
+ if( ID < 0 || ID >= giBank_NumUsers ) {
+ return -1;
+ }
+
+ // Commit to file
+ fseek(gBank_File, ID*sizeof(fu), SEEK_SET);
+
+ fu.UnixID = gaBank_Users[ID].UnixID;
+ fu.Balance = gaBank_Users[ID].Balance;
+ fu.Flags = gaBank_Users[ID].Flags;
+
+ fwrite(&fu, sizeof(fu), 1, gBank_File);
+
+ return 0;
+}
+
+/*
+ * Transfers money from one user to another
* \param SourceUser Source user
* \param DestUser Destination user
* \param Ammount Ammount of cents to move from \a SourceUser to \a DestUser
* \param Reason Reason for the transfer (essentially a comment)
* \return Boolean failure
*/
-int Transfer(int SourceUser, int DestUser, int Ammount, const char *Reason)
+int Bank_Transfer(int SourceUser, int DestUser, int Ammount, const char *Reason)
{
- int srcBal = Bank_GetUserBalance(SourceUser);
- int dstBal = Bank_GetUserBalance(DestUser);
+ int srcBal = Bank_GetBalance(SourceUser);
+ int dstBal = Bank_GetBalance(DestUser);
- if( srcBal - Ammount < Bank_GetMinAllowedBalance(SourceUser) )
+ if( srcBal - Ammount < Bank_int_GetMinAllowedBalance(SourceUser) )
return 1;
- if( dstBal + Ammount < Bank_GetMinAllowedBalance(DestUser) )
+ if( dstBal + Ammount < Bank_int_GetMinAllowedBalance(DestUser) )
return 1;
- Bank_AlterUserBalance(DestUser, Ammount);
- Bank_AlterUserBalance(SourceUser, -Ammount);
+ Bank_int_AlterUserBalance(DestUser, Ammount);
+ Bank_int_AlterUserBalance(SourceUser, -Ammount);
fprintf(gBank_LogFile, "Transfer %ic #%i{%i} > #%i{%i} [%i, %i] (%s)\n",
Ammount, SourceUser, srcBal, DestUser, dstBal,
srcBal - Ammount, dstBal + Ammount, Reason);
return 0;
}
-int GetFlags(int User)
+int Bank_CreateAcct(const char *Name)
{
- return Bank_GetUserFlags(User);
+ int ret;
+
+ ret = Bank_GetAcctByName(Name);
+ if( ret != -1 ) return -1;
+
+ return Bank_int_AddUser(Name);
}
-int SetFlags(int User, int Mask, int Flags)
+tAcctIterator *Bank_Iterator(int FlagMask, int FlagValues, int Flags, int MinMaxBalance, time_t LastSeen)
{
- return Bank_SetUserFlags(User, Mask, Flags);
+ tAcctIterator *ret;
+
+ ret = calloc( 1, sizeof(tAcctIterator) );
+ if( !ret )
+ return NULL;
+ ret->MinBalance = INT_MIN;
+ ret->MaxBalance = INT_MAX;
+
+ ret->FlagMask = FlagMask;
+ ret->FlagValue = FlagValues & FlagMask;
+
+ if(Flags & BANK_ITFLAG_MINBALANCE)
+ ret->MinBalance = MinMaxBalance;
+ if(Flags & BANK_ITFLAG_MAXBALANCE)
+ ret->MaxBalance = MinMaxBalance;
+
+ ret->Sort = Flags & (BANK_ITFLAG_SORTMASK|BANK_ITFLAG_REVSORT);
+
+ // Shut up GCC
+ LastSeen = 0;
+
+ //if(Flags & BANK_ITFLAG_SEENBEFORE)
+ // ret->MinBalance = MinMaxBalance;
+ //if(Flags & BANK_ITFLAG_SEENAFTER)
+ // ret->MinBalance = MinMaxBalance;
+
+ return ret;
}
-/**
- * \brief Get the balance of the passed user
- */
-int GetBalance(int User)
+int Bank_IteratorNext(tAcctIterator *It)
{
- return Bank_GetUserBalance(User);
+ int ret;
+
+ while(It->CurUser < giBank_NumUsers)
+ {
+ switch(It->Sort)
+ {
+ case BANK_ITFLAG_SORT_NONE:
+ case BANK_ITFLAG_SORT_NONE | BANK_ITFLAG_REVSORT:
+ ret = It->CurUser;
+ break;
+ case BANK_ITFLAG_SORT_NAME:
+ ret = indexof(gaBank_Users, gaBank_UsersByName[It->CurUser]);
+ break;
+ case BANK_ITFLAG_SORT_NAME | BANK_ITFLAG_REVSORT:
+ ret = indexof(gaBank_Users, gaBank_UsersByName[giBank_NumUsers-It->CurUser]);
+ break;
+ case BANK_ITFLAG_SORT_BAL:
+ ret = indexof(gaBank_Users, gaBank_UsersByBalance[It->CurUser]);
+ printf("Sort by balance (ret = %i)\n", ret);
+ break;
+ case BANK_ITFLAG_SORT_BAL | BANK_ITFLAG_REVSORT:
+ ret = indexof(gaBank_Users, gaBank_UsersByBalance[giBank_NumUsers-It->CurUser]);
+ break;
+ default:
+ fprintf(stderr, "BUG: Unsupported sort in Bank_IteratorNext\n");
+ return -1;
+ }
+ It->CurUser ++;
+
+ if( gaBank_Users[ret].Balance < It->MinBalance )
+ continue;
+ if( gaBank_Users[ret].Balance > It->MaxBalance )
+ continue;
+ if( (gaBank_Users[ret].Flags & It->FlagMask) != It->FlagValue )
+ continue;
+
+ return ret;
+ }
+ return -1;
}
-/**
- * \brief Return the name the passed user
- */
-char *GetUserName(int User)
+void Bank_DelIterator(tAcctIterator *It)
{
- return Bank_GetUserName(User);
+ free(It);
}
-/**
+/*
* \brief Get the User ID of the named user
*/
-int GetUserID(const char *Username)
+int Bank_GetAcctByName(const char *Username)
+{
+ #if 0
+ int i, size;
+ i = giBank_NumUsers / 2;
+ size = giBank_NumUsers;
+ for(;;)
+ {
+ cmp = strcmp(gaBank_UsersByName[i]->Name, Username);
+ if( cmp == 0 )
+ return indexof(gaBank_Users, gaBank_UsersByName[i];
+
+ // Not found
+ if( size == 0 )
+ return -1;
+
+ if( cmp < 0 )
+ i += size;
+ else
+ i -= size;
+ size /= 2;
+ }
+ #else
+ int i, uid;
+ uid = Bank_int_GetUnixID(Username);
+
+ // Expensive search :(
+ for( i = 0; i < giBank_NumUsers; i ++ )
+ {
+ if( gaBank_Users[i].UnixID == uid )
+ return i;
+ }
+ #endif
+
+ return -1;
+}
+
+int Bank_GetBalance(int ID)
{
- return Bank_GetUserByName(Username);
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return INT_MIN;
+
+ return gaBank_Users[ID].Balance;
}
-int CreateUser(const char *Username)
+int Bank_GetFlags(int ID)
{
- int ret;
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return -1;
+
+ // root
+ if( gaBank_Users[ID].UnixID == 0 ) {
+ gaBank_Users[ID].Flags |= USER_FLAG_ADMIN|USER_FLAG_COKE;
+ }
+
+ #if USE_UNIX_GROUPS
+ // TODO: Implement checking the PAM groups and status instead, then
+ // fall back on the database. (and update if there is a difference)
+ if( gaBank_Users[ID].UnixID > 0 )
+ {
+ struct passwd *pwd;
+ struct group *grp;
+ int i;
+
+ // Get username
+ pwd = getpwuid( gaBank_Users[ID].UnixID );
+
+ // Check for additions to the "coke" group
+ grp = getgrnam("coke");
+ if( grp ) {
+ for( i = 0; grp->gr_mem[i]; i ++ )
+ {
+ if( strcmp(grp->gr_mem[i], pwd->pw_name) == 0 ) {
+ gaBank_Users[ID].Flags |= USER_FLAG_COKE;
+ break ;
+ }
+ }
+ }
+
+ #if 0
+ // Check for additions to the "wheel" group
+ grp = getgrnam("wheel");
+ if( grp ) {
+ for( i = 0; grp->gr_mem[i]; i ++ )
+ {
+ if( strcmp(grp->gr_mem[i], pwd->pw_name) == 0 ) {
+ gaBank_Users[ID].Flags |= USER_FLAG_ADMIN;
+ break ;
+ }
+ }
+ }
+ #endif
+ }
+ #endif
+
+ return gaBank_Users[ID].Flags;
+}
+
+int Bank_SetFlags(int ID, int Mask, int Value)
+{
+ // Sanity
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return -1;
- ret = Bank_GetUserByName(Username);
- if( ret != -1 ) return -1;
+ // Silently ignore changes to root and meta accounts
+ if( gaBank_Users[ID].UnixID <= 0 ) return 0;
+
+ gaBank_Users[ID].Flags &= ~Mask;
+ gaBank_Users[ID].Flags |= Value;
+
+ Bank_int_WriteEntry(ID);
- return Bank_AddUser(Username);
+ return 0;
}
-int GetMaxID(void)
+int Bank_int_AlterUserBalance(int ID, int Delta)
{
- return giBank_NumUsers;
+ // Sanity
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return -1;
+
+ // Update
+ gaBank_Users[ID].Balance += Delta;
+
+ Bank_int_WriteEntry(ID);
+
+ return 0;
}
-/**
- * \brief Authenticate a user
- * \return User ID, or -1 if authentication failed
+int Bank_int_GetMinAllowedBalance(int ID)
+{
+ int flags;
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return 0;
+
+ flags = Bank_GetFlags(ID);
+
+ // Internal accounts have no limit
+ if( (flags & USER_FLAG_INTERNAL) )
+ return INT_MIN;
+
+ // Wheel is allowed to go to -$100
+ if( (flags & USER_FLAG_ADMIN) )
+ return -10000;
+
+ // Coke is allowed to go to -$20
+ if( (flags & USER_FLAG_COKE) )
+ return -2000;
+
+ // For everyone else, no negative
+ return 0;
+}
+
+/*
+ * Create a new user in our database
+ */
+int Bank_int_AddUser(const char *Username)
+{
+ void *tmp;
+ int uid = Bank_int_GetUnixID(Username);
+
+ // Can has moar space plz?
+ // - Structures
+ tmp = realloc(gaBank_Users, (giBank_NumUsers+1)*sizeof(gaBank_Users[0]));
+ if( !tmp ) return -1;
+ gaBank_Users = tmp;
+ // - Name index
+ tmp = realloc(gaBank_UsersByName, (giBank_NumUsers+1)*sizeof(tUser*));
+ if( !tmp ) return -1;
+ gaBank_UsersByName = tmp;
+ // - Balance index
+ tmp = realloc(gaBank_UsersByBalance, (giBank_NumUsers+1)*sizeof(tUser*));
+ if( !tmp ) return -1;
+ gaBank_UsersByBalance = tmp;
+
+ // Crete new user
+ gaBank_Users[giBank_NumUsers].Name = NULL;
+ gaBank_Users[giBank_NumUsers].UnixID = uid;
+ gaBank_Users[giBank_NumUsers].Balance = 0;
+ gaBank_Users[giBank_NumUsers].Flags = 0;
+ gaBank_UsersByName[giBank_NumUsers] = &gaBank_Users[giBank_NumUsers];
+ gaBank_UsersByBalance[giBank_NumUsers] = &gaBank_Users[giBank_NumUsers];
+
+ // Set default flags
+ if( strcmp(Username, COKEBANK_DEBT_ACCT) == 0 ) {
+ gaBank_Users[giBank_NumUsers].Flags = USER_FLAG_INTERNAL;
+ }
+ else if( strcmp(Username, COKEBANK_SALES_ACCT) == 0 ) {
+ gaBank_Users[giBank_NumUsers].Flags = USER_FLAG_INTERNAL;
+ }
+ else if( strcmp(Username, "root") == 0 ) {
+ gaBank_Users[giBank_NumUsers].Flags = USER_FLAG_ADMIN|USER_FLAG_COKE;
+ }
+
+ // Increment count
+ giBank_NumUsers ++;
+
+ // Get name
+ gaBank_Users[giBank_NumUsers-1].Name = Bank_GetAcctName(giBank_NumUsers-1);
+
+ // Update indexes
+ qsort(gaBank_UsersByName, giBank_NumUsers, sizeof(tUser*), Bank_int_CompareNames);
+ qsort(gaBank_UsersByBalance, giBank_NumUsers, sizeof(tUser*), Bank_int_CompareBalance);
+
+ // Save
+ Bank_int_WriteEntry(giBank_NumUsers - 1);
+
+ return 0;
+}
+
+// ---
+// Unix user dependent code
+// TODO: Modify to keep its own list of usernames
+// ---
+char *Bank_GetAcctName(int ID)
+{
+ struct passwd *pwd;
+
+ if( ID < 0 || ID >= giBank_NumUsers )
+ return NULL;
+
+ if( gaBank_Users[ID].Name ) {
+ return strdup(gaBank_Users[ID].Name);
+ }
+
+ if( gaBank_Users[ID].UnixID == -1 )
+ return strdup(COKEBANK_SALES_ACCT);
+
+ if( gaBank_Users[ID].UnixID == -2 )
+ return strdup(COKEBANK_DEBT_ACCT);
+
+ pwd = getpwuid(gaBank_Users[ID].UnixID);
+ if( !pwd ) return NULL;
+
+ return strdup(pwd->pw_name);
+}
+
+int Bank_int_GetUnixID(const char *Username)
+{
+ int uid;
+
+ if( strcmp(Username, COKEBANK_SALES_ACCT) == 0 ) { // Pseudo account that sales are made into
+ uid = -1;
+ }
+ else if( strcmp(Username, COKEBANK_DEBT_ACCT) == 0 ) { // Pseudo acount that money is added from
+ uid = -2;
+ }
+ else {
+ struct passwd *pwd;
+ // Get user ID
+ pwd = getpwnam(Username);
+ if( !pwd ) return -1;
+ uid = pwd->pw_uid;
+ }
+ return uid;
+}
+
+
+/*
+ * Authenticate a user
*/
-int GetUserAuth(const char *Salt, const char *Username, const char *PasswordString)
+int Bank_GetUserAuth(const char *Salt, const char *Username, const char *Password)
{
#if USE_LDAP
uint8_t hash[20];
char *passhash;
#endif
+ #if 1
+ // Only here to shut GCC up (until password auth is implemented)
+ if( Salt == NULL )
+ return -1;
+ if( Password == NULL )
+ return -1;
+ #endif
+
#if HACK_TPG_NOAUTH
if( strcmp(Username, "tpg") == 0 )
- return GetUserID("tpg");
+ return Bank_GetAcctByName("tpg");
#endif
#if HACK_ROOT_NOAUTH
if( strcmp(Username, "root") == 0 ) {
- int ret = GetUserID("root");
+ int ret = Bank_GetAcctByName("root");
if( ret == -1 )
- return CreateUser("root");
+ return Bank_CreateAcct("root");
return ret;
}
#endif
#if USE_LDAP
- HexBin(hash, 20, PasswordString);
+ HexBin(hash, 20, Password);
// Build string to hash
strcpy(input, Username);
git.ucc.asn.au / tpg / opendispense2.git / blobdiff
UCC git Repository :: git.ucc.asn.au