Nétoyage de toutes les sources et suppression de la poudre au yeux de pam_oath_key
This commit is contained in:
parent
e5c4e6bf13
commit
7eb49b267b
67
authKeysPg.c
67
authKeysPg.c
@ -10,34 +10,21 @@
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#define BDD_PASS_FILE "/srv/bdd/pipi-system.pass"
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#define BDD_CONN_LENGTH 255
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static void
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exit_nicely(PGconn *conn)
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{
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PQfinish(conn);
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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PGconn *conn;
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PGresult *res;
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int nFields;
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int j,i;
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errno=0;
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/* Crée une connexion à la base de données */
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char connInfo[BDD_CONN_LENGTH] = "dbname='pipi' user=pipisys password='";
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char lastAp = '\'';
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FILE *dbPassFile;
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char ch;
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int pos = strlen(connInfo);
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PGconn *conn;
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PGresult *res;
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int i;
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// Récupère le mdp à la BDD
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dbPassFile = fopen(BDD_PASS_FILE,"r");
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if (dbPassFile == NULL) {
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fprintf(stderr,"Cannot open file %s, on peut pas se connecter à la base de données pour lister les clés en tant que %d -> fopen error %d\n", BDD_PASS_FILE,geteuid(),errno);
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@ -51,53 +38,43 @@ main(int argc, char **argv)
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fclose(dbPassFile);
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connInfo[pos] = '\'';
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// Connecte à la BDD
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conn = PQconnectdb(connInfo);
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/* Vérifier que la connexion au backend a été faite avec succès */
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if (PQstatus(conn) != CONNECTION_OK)
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{
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fprintf(stderr, "Connection to database failed: %s", PQerrorMessage(conn));
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exit_nicely(conn);
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PQfinish(conn);
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return 1;
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}
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/* Initialise un search path sûr, pour qu'un utilisateur
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malveillant ne puisse prendre le contrôle. */
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res = PQexec(conn,
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"SELECT pg_catalog.set_config('search_path', '', false)");
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if (PQresultStatus(res) != PGRES_TUPLES_OK)
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{
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fprintf(stderr, "SET failed: %s", PQerrorMessage(conn));
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PQclear(res);
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exit_nicely(conn);
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PQfinish(conn);
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return 1;
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}
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/*
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* Il faut libérer PGresult avec PQclear dès que l'on en a plus besoin pour
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* éviter les fuites de mémoire.
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*/
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PQclear(res);
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//res = PQprepare(conn,"GettingAllLoginGitUsersInfo","SELECT * FROM $1",1,NULL);
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//const char * tablename = "git-users";
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//res = PQexecPrepared(conn,"GettingAllLoginGitUsersInfo",1,"git-users",NULL,NULL,0);
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res = PQexec(conn,"SELECT \"userID\",\"sshKeyType\",\"sshPubKey\" FROM git.keys");
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/* affiche d'abord les noms des attributs */
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nFields = PQnfields(res);
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fprintf(stderr, PQerrorMessage(conn));
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/* puis affiche les lignes */
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// Demande les données à la BDD
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res = PQexec(conn,"SELECT \"sshKeyType\",\"sshPubKey\" FROM git.keys");
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if (PQresultStatus(res) != PGRES_TUPLES_OK) {
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fprintf(stderr,"Impossible de lancer la requête SQL pour les autorisations: %s",PQerrorMessage(conn));
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PQclear(res);
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PQfinish(conn);
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return 1;
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}
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// Renvoie le résultat à travers stdout
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for (i = 0; i < PQntuples(res); i++)
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{
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printf("%s %s\n",PQgetvalue(res,i,1),PQgetvalue(res,i,2));
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printf("%s %s\n",PQgetvalue(res,i,0),PQgetvalue(res,i,1));
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}
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PQclear(res);
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fprintf(stderr,"La liste des clés a été envoyée\n");
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/* ferme la connexion à la base et nettoie */
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PQclear(res);
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PQfinish(conn);
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return 0;
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}
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@ -148,6 +148,7 @@ int main(int argc, char **argv, char **envp){
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ERR("Impossible de lancer la requête SQL pour les autorisations: %s",PQerrorMessage(conn));
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PQclear(res);
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nargv_free(gitargv);
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PQfinish(conn);
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return 1;
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}
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201
pam_oath_key.c
201
pam_oath_key.c
@ -11,25 +11,22 @@
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#include <arpa/inet.h> //Pour la conversion bigendian/littleendian
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// These #defines must be present according to PAM documentation.
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// Qu'es-ce qui est défini
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#define PAM_SM_AUTH
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//#define PAM_SM_ACCOUNT
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//#define PAM_SM_SESSION
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//#define PAM_SM_PASSWORD
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#include <syslog.h>
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <security/pam_modutil.h>
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#include <security/pam_ext.h>
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// Les fonctions de debug
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#define D(x) do {\
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printf("[%s:%s(%d)] ", __FILE__, __FUNCTION__, __LINE__);\
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printf x;\
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printf("\n");\
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} while (0)
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#define DBG(x) if (cfg.debug) {\
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D(x);\
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#define D(...) \
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pam_syslog(pamh, LOG_NOTICE, ##__VA_ARGS__);
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#define DBG(...) if(cfg.debug) {\
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pam_syslog(pamh, LOG_NOTICE, ##__VA_ARGS__);\
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}
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#define PAM_EXTERN extern
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@ -62,10 +59,10 @@ static void copyUntilEndline(const char * src, char dest[]){
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}
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static void
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parse_cfg(int flags, int argc,
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const char ** argv, struct cfg * cfg) {
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parse_cfg(pam_handle_t * pamh, int flags, int argc, const char ** argv, struct cfg * cfg) {
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int i;
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cfg -> debug = 1;
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cfg -> digits = 6;
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cfg -> window = 5;
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@ -80,17 +77,17 @@ parse_cfg(int flags, int argc,
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}
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if (MIN_OTP_LEN > cfg -> digits || cfg -> digits > MAX_OTP_LEN) {
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D(("La longueur du code otp doit être entre %i et %i. Valeur invalide: digits=%i",MIN_OTP_LEN,MAX_OTP_LEN, cfg -> digits));
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D("La longueur du code otp doit être entre %i et %i. Valeur invalide: digits=%i",MIN_OTP_LEN,MAX_OTP_LEN, cfg -> digits);
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}
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if (cfg -> debug) {
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D(("called."));
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D(("flags %d argc %d", flags, argc));
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D("called.");
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D("flags %d argc %d", flags, argc);
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for (i = 0; i < argc; i++)
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D(("argv[%d]=%s", i, argv[i]));
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D(("debug=%d", cfg -> debug));
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D(("digits=%d", cfg -> digits));
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D(("window=%d", cfg -> window));
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D("argv[%d]=%s", i, argv[i]);
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D("debug=%d", cfg -> debug);
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D("digits=%d", cfg -> digits);
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D("window=%d", cfg -> window);
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}
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}
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@ -99,7 +96,7 @@ char * strtokk(char * str,const char cutter) {
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while((*str != cutter) && (*str != '\0'))
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str++;
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bool strEnd = (*str == '\0');
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int strEnd = (*str == '\0');
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*str = '\0';
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if(!strEnd)
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str++;
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@ -131,7 +128,6 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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int retval, rc;
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const char * user = NULL;
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const char * password = NULL;
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char otp[MAX_OTP_LEN + 1];
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int password_len = 0;
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@ -145,75 +141,69 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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PGconn *conn;
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PGresult *res;
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int nFields;
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const char * ssh_auth_info_ret;
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char ssh_auth_info [SSH_AUTH_INFO_LEN];
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int gitUserID;
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char * oathSecret;
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char * authType;
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char * sshKeyType;
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char * sshKeyVal;
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char connInfo[BDD_CONN_LENGTH] = "dbname='pipi' user=pipisys password='";
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FILE *dbPassFile;
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int pos = strlen(connInfo);
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const char *paramValues[2];
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char oathSecretBin[OTP_SECRET_LEN];
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int oathSecretBinLen = OTP_SECRET_LEN+1;
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//GIT_USERID=########
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char envStr[11+8];
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FILE* stderr2 = fopen("/tmp/pam-oath.log","w");
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D(("Running the oath authenticator !\n"));
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fprintf(stderr2,"Ca a au moins passé l'init ...\n");
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D("Running the oath authenticator !\n");
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/***** Parsing config *****/
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parse_cfg(flags, argc, argv, & cfg);
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parse_cfg(pamh, flags, argc, argv, &cfg);
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/***** Getting User *****/
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retval = pam_get_user(pamh, &user, NULL);
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if (retval != PAM_SUCCESS) {
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DBG(("Could not get PAM user: %s", pam_strerror(pamh, retval)));
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goto done;
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}
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DBG(("We got the user: %s", user));
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fprintf(stderr2,"Le user est là ! %s\n", user);
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/****** Getting ssh key ******/
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/****** Retrieve SSH authentication information. ******/
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ssh_auth_info_ret = pam_getenv(pamh, "SSH_AUTH_INFO_0");
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/* Retrieve SSH authentication information. */
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const char * ssh_auth_info_ret = pam_getenv(pamh, "SSH_AUTH_INFO_0");
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char ssh_auth_info [SSH_AUTH_INFO_LEN];
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ssh_auth_info_ret = "pubkey ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILNTOkgZXdTFzWOC9R1Aeuq30B3lG+Eq8nL76tZsJ9Qn\n c aca prout caca";
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fprintf(stderr2,"Les infos que j'ai récupéré: %s;;\n", ssh_auth_info_ret);
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if (!ssh_auth_info_ret || !*ssh_auth_info_ret) {
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DBG(("No SSH auth info, impossible de traiter"));
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D("Impossible de récupérer les données de connection SSH, impossible de traiter");
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return PAM_AUTHINFO_UNAVAIL;
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}
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copyUntilEndline(ssh_auth_info_ret,ssh_auth_info);
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DBG(("Infos de connection: %s",ssh_auth_info));
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DBG("Infos de connection: %s",ssh_auth_info);
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const char delim = ' ';
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char * authType = ssh_auth_info;
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char * sshKeyType = strtokk(ssh_auth_info, delim);
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char * sshKeyVal = strtokk(sshKeyType, delim);
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DBG(("Authentification Type: '%s'", authType));
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DBG(("Authentification KeyType: '%s'", sshKeyType));
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DBG(("Authentification KeyVal: '%s'", sshKeyVal));
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authType = ssh_auth_info;
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sshKeyType = strtokk(ssh_auth_info, ' ');
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sshKeyVal = strtokk(sshKeyType, ' ');
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DBG("Authentification Type: '%s'", authType);
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DBG("Authentification KeyType: '%s'", sshKeyType);
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DBG("Authentification KeyVal: '%s'", sshKeyVal);
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rc = oath_init();
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if (rc != OATH_OK) {
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DBG(("oath_init() failed (%d)", rc));
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DBG("oath_init() failed (%d)", rc);
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retval = PAM_AUTHINFO_UNAVAIL;
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goto done;
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}
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/****** Get oath secret from database ******/
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char connInfo[BDD_CONN_LENGTH] = "dbname='pipi' user=pipisys password='";
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char lastAp = '\'';
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FILE *dbPassFile;
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char ch;
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int pos = strlen(connInfo);
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/****** Get oath secret from database ******/
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dbPassFile = fopen(BDD_PASS_FILE,"r");
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if (dbPassFile == NULL) {
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DBG(("Cannot open file %s, on peut pas se connecter à la base de données avec l'UID %s\n", BDD_PASS_FILE, getuid()));
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DBG("Cannot open file %s, on peut pas se connecter à la base de données avec l'UID %s\n", BDD_PASS_FILE, getuid());
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retval = PAM_AUTHINFO_UNAVAIL;
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goto done;
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}
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@ -225,14 +215,13 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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fclose(dbPassFile);
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connInfo[pos] = '\'';
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fprintf(stderr2,"On se connecte à la bdd\n");
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conn = PQconnectdb(connInfo);
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/* Vérifier que la connexion au backend a été faite avec succès */
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if (PQstatus(conn) != CONNECTION_OK) {
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DBG(("Connection to database failed: %s", PQerrorMessage(conn)));
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DBG("Connection to database failed: %s", PQerrorMessage(conn));
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retval = PAM_AUTH_ERR;
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goto done;
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}
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@ -240,23 +229,22 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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res = PQexec(conn,
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"SELECT pg_catalog.set_config('search_path', '', false)");
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if (PQresultStatus(res) != PGRES_TUPLES_OK) {
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DBG(("SET failed: %s", PQerrorMessage(conn)));
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DBG("SET failed: %s", PQerrorMessage(conn));
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PQclear(res);
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retval = PAM_AUTH_ERR;
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goto done;
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}
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DBG(("Initialisation de la base de données efféctuée\n"));
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fprintf(stderr2,"Initialisation de la connection à la bdd effectuée\n");
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DBG("Initialisation de la base de données efféctuée\n");
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PQclear(res);
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const char *paramValues[2];
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paramValues[0] = sshKeyType;
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paramValues[1] = sshKeyVal;
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res = PQexecParams(conn, "SELECT \"userID\",\"oathPrivate\" FROM git.keys WHERE \"sshKeyType\"=$1 AND \"sshPubKey\"=$2",2,NULL,paramValues,NULL,NULL,1);
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if (PQresultStatus(res) != PGRES_TUPLES_OK) {
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DBG(("Impossible de faire la requete à la BDD: %s", PQerrorMessage(conn)));
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DBG("Impossible de faire la requete à la BDD: %s", PQerrorMessage(conn));
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PQclear(res);
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retval = PAM_AUTH_ERR;
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goto done;
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@ -264,7 +252,7 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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nFields = PQntuples(res);
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if(nFields!=1){
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DBG(("Aucun code secret oath trouvé pour la clé '%s'", sshKeyVal));
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DBG("Aucun code secret oath trouvé pour la clé '%s'", sshKeyVal);
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PQclear(res);
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retval = PAM_AUTH_ERR;
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goto done;
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@ -273,11 +261,7 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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gitUserID = ntohl(*((int*)PQgetvalue(res, 0, 0)));
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oathSecret = PQgetvalue(res, 0, 1);
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DBG(("On a récupéré le code secret : %s",oathSecret));
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if(PQgetisnull(res, 0, 0)==1){
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printf("Le champ est bien nul !\n");
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}
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DBG("On a récupéré le code secret : %s",oathSecret);
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PQclear(res);
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PQfinish(conn);
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@ -285,8 +269,6 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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/*** Parsing hex to byte array ***/
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char oathSecretBin[OTP_SECRET_LEN];
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int oathSecretBinLen = OTP_SECRET_LEN+1;
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oath_hex2bin(oathSecret,oathSecretBin,&oathSecretBinLen);
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@ -300,26 +282,8 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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}
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pmsg[0] = & msg[0];
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{
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const char * query_template = "One-time password (OATH) for `%s': ";
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size_t len = strlen(query_template) + strlen(user);
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size_t wrote;
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query_prompt = malloc(len);
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if (!query_prompt) {
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retval = PAM_BUF_ERR;
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goto done;
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}
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wrote = snprintf(query_prompt, len, query_template, user);
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if (wrote < 0 || wrote >= len) {
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retval = PAM_BUF_ERR;
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goto done;
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}
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msg[0].msg = query_prompt;
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}
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msg[0].msg = "Votre mot de passe OTP: ";
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msg[0].msg_style = PAM_PROMPT_ECHO_OFF;
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resp = NULL;
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@ -330,32 +294,32 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
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query_prompt = NULL;
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if (retval != PAM_SUCCESS) {
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DBG(("conv returned error: %s", pam_strerror(pamh, retval)));
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DBG("conv returned error: %s", pam_strerror(pamh, retval));
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goto done;
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}
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DBG(("conv returned: %s", resp -> resp));
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DBG("conv returned: %s", resp -> resp);
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password = resp -> resp;
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if (password)
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password_len = strlen(password);
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else {
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||||
DBG(("Could not read password"));
|
||||
DBG("Could not read password");
|
||||
retval = PAM_AUTH_ERR;
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (password_len < MIN_OTP_LEN) {
|
||||
DBG(("OTP too short: %s", password));
|
||||
DBG("OTP trop court: %s", password);
|
||||
retval = PAM_AUTH_ERR;
|
||||
goto done;
|
||||
} else if (password_len < cfg.digits) {
|
||||
DBG(("OTP shorter than digits=%d: %s", cfg.digits, password));
|
||||
DBG("OTP trop court, on a demandé plus de chiffres: %s", cfg.digits, password);
|
||||
retval = PAM_AUTH_ERR;
|
||||
goto done;
|
||||
} else if (password_len > MAX_OTP_LEN) {
|
||||
DBG(("OTP too long (and no digits=): %s", password));
|
||||
DBG("OTP trop long: %s", password);
|
||||
retval = PAM_AUTH_ERR;
|
||||
goto done;
|
||||
} else {
|
||||
@ -363,7 +327,7 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
|
||||
password = NULL;
|
||||
}
|
||||
|
||||
DBG(("Pouf ! OTP: %s", otp ? otp : "(null)"));
|
||||
DBG("Pouf ! OTP: %s", otp ? otp : "(null)");
|
||||
|
||||
|
||||
|
||||
@ -371,40 +335,43 @@ pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char ** argv
|
||||
/****** Validation du mot de passe oath ******/
|
||||
{
|
||||
time_t last_otp;
|
||||
time_t jetzt = 0;
|
||||
time(&jetzt);
|
||||
time_t jetzt;
|
||||
int timeStep = 30;
|
||||
DBG(("Validating oath secret %s of length %i at time %ld",oathSecret,oathSecretBinLen, jetzt));
|
||||
char cdex[32];
|
||||
|
||||
time(&jetzt);
|
||||
|
||||
DBG("Validation du code secret %s, longueur %i, temps %ld",oathSecret,oathSecretBinLen,jetzt);
|
||||
|
||||
rc = oath_totp_validate(oathSecretBin, oathSecretBinLen, jetzt, timeStep, 0, cfg.window, otp);
|
||||
}
|
||||
|
||||
if (rc == OATH_INVALID_OTP) {
|
||||
DBG(("One-time password not authorized to login as user '%s'", user));
|
||||
DBG("Mot de passe OTP invalide.");
|
||||
retval = PAM_AUTH_ERR;
|
||||
goto done;
|
||||
}
|
||||
|
||||
|
||||
retval = PAM_SUCCESS;
|
||||
|
||||
// On met l'id de l'utisateur pour les autorisations
|
||||
char envStr[11+8];
|
||||
/****** On met l'id de l'utisateur pour les autorisations ******/
|
||||
sprintf(envStr, "GIT_USERID=%d",gitUserID);
|
||||
pam_putenv(pamh,envStr);
|
||||
|
||||
|
||||
/****** Terminé ! ******/
|
||||
done:
|
||||
fclose(stderr2);
|
||||
|
||||
oath_done();
|
||||
free(query_prompt);
|
||||
free(onlypasswd);
|
||||
|
||||
DBG(("Terminé ! [%s]", pam_strerror(pamh, retval)));
|
||||
DBG("Terminé ! [%s]", pam_strerror(pamh, retval));
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
|
||||
int pam_sm_setcred(pam_handle_t *pamh,int flags,int argc
|
||||
,const char **argv)
|
||||
{
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user