krb5_error_code KRB5_CALLCONV krb5_mcc_generate_new (krb5_context context, krb5_ccache *id) { krb5_ccache lid; char uniquename[8]; krb5_error_code err; krb5_mcc_data *d; /* Allocate memory */ lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache)); if (lid == NULL) return KRB5_CC_NOMEM; lid->ops = &krb5_mcc_ops; err = k5_cc_mutex_lock(context, &krb5int_mcc_mutex); if (err) { free(lid); return err; } /* Check for uniqueness with mutex locked to avoid race conditions */ while (1) { krb5_mcc_list_node *ptr; err = krb5int_random_string (context, uniquename, sizeof (uniquename)); if (err) { k5_cc_mutex_unlock(context, &krb5int_mcc_mutex); free(lid); return err; } for (ptr = mcc_head; ptr; ptr=ptr->next) { if (!strcmp(ptr->cache->name, uniquename)) { break; /* got a match, loop again */ } } if (!ptr) break; /* got to the end without finding a match */ } err = new_mcc_data(uniquename, &d); k5_cc_mutex_unlock(context, &krb5int_mcc_mutex); if (err) { free(lid); return err; } lid->data = d; *id = lid; krb5_change_cache (); return KRB5_OK; }
krb5_error_code KRB5_CALLCONV krb5_mcc_generate_new (krb5_context context, krb5_ccache *id) { krb5_ccache lid; char uniquename[8]; krb5_error_code err; krb5_mcc_data *d; /* Allocate memory */ lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache)); if (lid == NULL) return KRB5_CC_NOMEM; lid->ops = &krb5_mcc_ops; k5_cc_mutex_lock(context, &krb5int_mcc_mutex); init_table(context); /* Check for uniqueness with mutex locked to avoid race conditions */ while (1) { err = krb5int_random_string (context, uniquename, sizeof (uniquename)); if (err) { k5_cc_mutex_unlock(context, &krb5int_mcc_mutex); free(lid); return err; } if (k5_hashtab_get(mcc_hashtab, uniquename, strlen(uniquename)) == NULL) break; } err = new_mcc_data(uniquename, &d); k5_cc_mutex_unlock(context, &krb5int_mcc_mutex); if (err) { free(lid); return err; } lid->data = d; *id = lid; krb5_change_cache (); return KRB5_OK; }