/src/hostap/src/ap/pmksa_cache_auth.c

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/*
 * hostapd - PMKSA cache for IEEE 802.11i RSN
 * Copyright (c) 2004-2008, 2012-2015, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "utils/includes.h"

#include "utils/common.h"
#include "utils/eloop.h"
#include "eapol_auth/eapol_auth_sm.h"
#include "eapol_auth/eapol_auth_sm_i.h"
#include "radius/radius_das.h"
#include "sta_info.h"
#include "ap_config.h"
#include "pmksa_cache_auth.h"


static const int pmksa_cache_max_entries = 1024;
static const int dot11RSNAConfigPMKLifetime = 43200;

struct rsn_pmksa_cache {
#define PMKID_HASH_SIZE 128
#define PMKID_HASH(pmkid) (unsigned int) ((pmkid)[0] & 0x7f)
  struct rsn_pmksa_cache_entry *pmkid[PMKID_HASH_SIZE];
  struct rsn_pmksa_cache_entry *pmksa;
  int pmksa_count;

  void (*free_cb)(struct rsn_pmksa_cache_entry *entry, void *ctx);
  void *ctx;
};


static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa);


static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry)
{
  os_free(entry->vlan_desc);
  os_free(entry->identity);
  os_free(entry->dpp_pkhash);
  wpabuf_free(entry->cui);
#ifndef CONFIG_NO_RADIUS
  radius_free_class(&entry->radius_class);
#endif /* CONFIG_NO_RADIUS */
  bin_clear_free(entry, sizeof(*entry));
}


void pmksa_cache_free_entry(struct rsn_pmksa_cache *pmksa,
          struct rsn_pmksa_cache_entry *entry)
{
  struct rsn_pmksa_cache_entry *pos, *prev;
  unsigned int hash;

  pmksa->pmksa_count--;

  if (pmksa->free_cb)
    pmksa->free_cb(entry, pmksa->ctx);

  /* unlink from hash list */
  hash = PMKID_HASH(entry->pmkid);
  pos = pmksa->pmkid[hash];
  prev = NULL;
  while (pos) {
    if (pos == entry) {
      if (prev != NULL)
        prev->hnext = entry->hnext;
      else
        pmksa->pmkid[hash] = entry->hnext;
      break;
    }
    prev = pos;
    pos = pos->hnext;
  }

  /* unlink from entry list */
  pos = pmksa->pmksa;
  prev = NULL;
  while (pos) {
    if (pos == entry) {
      if (prev != NULL)
        prev->next = entry->next;
      else
        pmksa->pmksa = entry->next;
      break;
    }
    prev = pos;
    pos = pos->next;
  }

  _pmksa_cache_free_entry(entry);
}


/**
 * pmksa_cache_auth_flush - Flush all PMKSA cache entries
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 */
void pmksa_cache_auth_flush(struct rsn_pmksa_cache *pmksa)
{
  while (pmksa->pmksa) {
    wpa_printf(MSG_DEBUG, "RSN: Flush PMKSA cache entry for "
         MACSTR, MAC2STR(pmksa->pmksa->spa));
    pmksa_cache_free_entry(pmksa, pmksa->pmksa);
  }
}


static void pmksa_cache_expire(void *eloop_ctx, void *timeout_ctx)
{
  struct rsn_pmksa_cache *pmksa = eloop_ctx;
  struct os_reltime now;

  os_get_reltime(&now);
  while (pmksa->pmksa && pmksa->pmksa->expiration <= now.sec) {
    wpa_printf(MSG_DEBUG, "RSN: expired PMKSA cache entry for "
         MACSTR, MAC2STR(pmksa->pmksa->spa));
    pmksa_cache_free_entry(pmksa, pmksa->pmksa);
  }

  pmksa_cache_set_expiration(pmksa);
}


static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa)
{
  int sec;
  struct os_reltime now;

  eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL);
  if (pmksa->pmksa == NULL)
    return;
  os_get_reltime(&now);
  sec = pmksa->pmksa->expiration - now.sec;
  if (sec < 0)
    sec = 0;
  eloop_register_timeout(sec + 1, 0, pmksa_cache_expire, pmksa, NULL);
}


static void pmksa_cache_from_eapol_data(struct rsn_pmksa_cache_entry *entry,
          struct eapol_state_machine *eapol)
{
  struct vlan_description *vlan_desc;

  if (eapol == NULL)
    return;

  if (eapol->identity) {
    entry->identity = os_malloc(eapol->identity_len);
    if (entry->identity) {
      entry->identity_len = eapol->identity_len;
      os_memcpy(entry->identity, eapol->identity,
          eapol->identity_len);
    }
  }

  if (eapol->radius_cui)
    entry->cui = wpabuf_dup(eapol->radius_cui);

#ifndef CONFIG_NO_RADIUS
  radius_copy_class(&entry->radius_class, &eapol->radius_class);
#endif /* CONFIG_NO_RADIUS */

  entry->eap_type_authsrv = eapol->eap_type_authsrv;

  vlan_desc = ((struct sta_info *) eapol->sta)->vlan_desc;
  if (vlan_desc && vlan_desc->notempty) {
    entry->vlan_desc = os_zalloc(sizeof(struct vlan_description));
    if (entry->vlan_desc)
      *entry->vlan_desc = *vlan_desc;
  } else {
    entry->vlan_desc = NULL;
  }

  entry->acct_multi_session_id = eapol->acct_multi_session_id;
}


void pmksa_cache_to_eapol_data(struct hostapd_data *hapd,
             struct rsn_pmksa_cache_entry *entry,
             struct eapol_state_machine *eapol)
{
  if (entry == NULL || eapol == NULL)
    return;

  if (entry->identity) {
    os_free(eapol->identity);
    eapol->identity = os_malloc(entry->identity_len);
    if (eapol->identity) {
      eapol->identity_len = entry->identity_len;
      os_memcpy(eapol->identity, entry->identity,
          entry->identity_len);
    }
    wpa_hexdump_ascii(MSG_DEBUG, "STA identity from PMKSA",
          eapol->identity, eapol->identity_len);
  }

  if (entry->cui) {
    wpabuf_free(eapol->radius_cui);
    eapol->radius_cui = wpabuf_dup(entry->cui);
  }

#ifndef CONFIG_NO_RADIUS
  radius_free_class(&eapol->radius_class);
  radius_copy_class(&eapol->radius_class, &entry->radius_class);
#endif /* CONFIG_NO_RADIUS */
  if (eapol->radius_class.attr) {
    wpa_printf(MSG_DEBUG, "Copied %lu Class attribute(s) from "
         "PMKSA", (unsigned long) eapol->radius_class.count);
  }

  eapol->eap_type_authsrv = entry->eap_type_authsrv;
#ifndef CONFIG_NO_VLAN
  ap_sta_set_vlan(hapd, eapol->sta, entry->vlan_desc);
#endif /* CONFIG_NO_VLAN */

  eapol->acct_multi_session_id = entry->acct_multi_session_id;
}


static void pmksa_cache_link_entry(struct rsn_pmksa_cache *pmksa,
           struct rsn_pmksa_cache_entry *entry)
{
  struct rsn_pmksa_cache_entry *pos, *prev;
  int hash;

  /* Add the new entry; order by expiration time */
  pos = pmksa->pmksa;
  prev = NULL;
  while (pos) {
    if (pos->expiration > entry->expiration)
      break;
    prev = pos;
    pos = pos->next;
  }
  if (prev == NULL) {
    entry->next = pmksa->pmksa;
    pmksa->pmksa = entry;
  } else {
    entry->next = prev->next;
    prev->next = entry;
  }

  hash = PMKID_HASH(entry->pmkid);
  entry->hnext = pmksa->pmkid[hash];
  pmksa->pmkid[hash] = entry;

  pmksa->pmksa_count++;
  if (prev == NULL)
    pmksa_cache_set_expiration(pmksa);
  wpa_printf(MSG_DEBUG, "RSN: added PMKSA cache entry for " MACSTR,
       MAC2STR(entry->spa));
  wpa_hexdump(MSG_DEBUG, "RSN: added PMKID", entry->pmkid, PMKID_LEN);
}


/**
 * pmksa_cache_auth_add - Add a PMKSA cache entry
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @pmk: The new pairwise master key
 * @pmk_len: PMK length in bytes, usually PMK_LEN (32)
 * @pmkid: Calculated PMKID
 * @kck: Key confirmation key or %NULL if not yet derived
 * @kck_len: KCK length in bytes
 * @aa: Authenticator address
 * @spa: Supplicant address
 * @session_timeout: Session timeout
 * @eapol: Pointer to EAPOL state machine data
 * @akmp: WPA_KEY_MGMT_* used in key derivation
 * Returns: Pointer to the added PMKSA cache entry or %NULL on error
 *
 * This function create a PMKSA entry for a new PMK and adds it to the PMKSA
 * cache. If an old entry is already in the cache for the same Supplicant,
 * this entry will be replaced with the new entry. PMKID will be calculated
 * based on the PMK.
 */
struct rsn_pmksa_cache_entry *
pmksa_cache_auth_add(struct rsn_pmksa_cache *pmksa,
         const u8 *pmk, size_t pmk_len, const u8 *pmkid,
         const u8 *kck, size_t kck_len,
         const u8 *aa, const u8 *spa, int session_timeout,
         struct eapol_state_machine *eapol, int akmp)
{
  struct rsn_pmksa_cache_entry *entry;

  entry = pmksa_cache_auth_create_entry(pmk, pmk_len, pmkid, kck, kck_len,
                aa, spa, session_timeout, eapol,
                akmp);

  if (pmksa_cache_auth_add_entry(pmksa, entry) < 0)
    return NULL;

  return entry;
}


/**
 * pmksa_cache_auth_create_entry - Create a PMKSA cache entry
 * @pmk: The new pairwise master key
 * @pmk_len: PMK length in bytes, usually PMK_LEN (32)
 * @pmkid: Calculated PMKID
 * @kck: Key confirmation key or %NULL if not yet derived
 * @kck_len: KCK length in bytes
 * @aa: Authenticator address
 * @spa: Supplicant address
 * @session_timeout: Session timeout
 * @eapol: Pointer to EAPOL state machine data
 * @akmp: WPA_KEY_MGMT_* used in key derivation
 * Returns: Pointer to the added PMKSA cache entry or %NULL on error
 *
 * This function creates a PMKSA entry.
 */
struct rsn_pmksa_cache_entry *
pmksa_cache_auth_create_entry(const u8 *pmk, size_t pmk_len, const u8 *pmkid,
            const u8 *kck, size_t kck_len, const u8 *aa,
            const u8 *spa, int session_timeout,
            struct eapol_state_machine *eapol, int akmp)
{
  struct rsn_pmksa_cache_entry *entry;
  struct os_reltime now;

  if (pmk_len > PMK_LEN_MAX)
    return NULL;

  if (wpa_key_mgmt_suite_b(akmp) && !kck)
    return NULL;

  entry = os_zalloc(sizeof(*entry));
  if (entry == NULL)
    return NULL;
  os_memcpy(entry->pmk, pmk, pmk_len);
  entry->pmk_len = pmk_len;
  if (kck && kck_len && kck_len < WPA_KCK_MAX_LEN) {
    os_memcpy(entry->kck, kck, kck_len);
    entry->kck_len = kck_len;
  }
  if (pmkid)
    os_memcpy(entry->pmkid, pmkid, PMKID_LEN);
  else if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
    rsn_pmkid_suite_b_192(kck, kck_len, aa, spa, entry->pmkid);
  else if (wpa_key_mgmt_suite_b(akmp))
    rsn_pmkid_suite_b(kck, kck_len, aa, spa, entry->pmkid);
  else
    rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid, akmp);
  os_get_reltime(&now);
  entry->expiration = now.sec;
  if (session_timeout > 0)
    entry->expiration += session_timeout;
  else
    entry->expiration += dot11RSNAConfigPMKLifetime;
  entry->akmp = akmp;
  os_memcpy(entry->spa, spa, ETH_ALEN);
  pmksa_cache_from_eapol_data(entry, eapol);

  return entry;
}


/**
 * pmksa_cache_auth_add_entry - Add a PMKSA cache entry
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @entry: Pointer to PMKSA cache entry
 *
 * This function adds PMKSA cache entry to the PMKSA cache. If an old entry is
 * already in the cache for the same Supplicant, this entry will be replaced
 * with the new entry. PMKID will be calculated based on the PMK.
 */
int pmksa_cache_auth_add_entry(struct rsn_pmksa_cache *pmksa,
             struct rsn_pmksa_cache_entry *entry)
{
  struct rsn_pmksa_cache_entry *pos;

  if (entry == NULL)
    return -1;

  /* Replace an old entry for the same STA (if found) with the new entry
   */
  pos = pmksa_cache_auth_get(pmksa, entry->spa, NULL);
  if (pos)
    pmksa_cache_free_entry(pmksa, pos);

  if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) {
    /* Remove the oldest entry to make room for the new entry */
    wpa_printf(MSG_DEBUG, "RSN: removed the oldest PMKSA cache "
         "entry (for " MACSTR ") to make room for new one",
         MAC2STR(pmksa->pmksa->spa));
    pmksa_cache_free_entry(pmksa, pmksa->pmksa);
  }

  pmksa_cache_link_entry(pmksa, entry);

  return 0;
}


struct rsn_pmksa_cache_entry *
pmksa_cache_add_okc(struct rsn_pmksa_cache *pmksa,
        const struct rsn_pmksa_cache_entry *old_entry,
        const u8 *aa, const u8 *pmkid)
{
  struct rsn_pmksa_cache_entry *entry;

  entry = os_zalloc(sizeof(*entry));
  if (entry == NULL)
    return NULL;
  os_memcpy(entry->pmkid, pmkid, PMKID_LEN);
  os_memcpy(entry->pmk, old_entry->pmk, old_entry->pmk_len);
  entry->pmk_len = old_entry->pmk_len;
  entry->expiration = old_entry->expiration;
  entry->akmp = old_entry->akmp;
  os_memcpy(entry->spa, old_entry->spa, ETH_ALEN);
  entry->opportunistic = 1;
  if (old_entry->identity) {
    entry->identity = os_malloc(old_entry->identity_len);
    if (entry->identity) {
      entry->identity_len = old_entry->identity_len;
      os_memcpy(entry->identity, old_entry->identity,
          old_entry->identity_len);
    }
  }
  if (old_entry->cui)
    entry->cui = wpabuf_dup(old_entry->cui);
#ifndef CONFIG_NO_RADIUS
  radius_copy_class(&entry->radius_class, &old_entry->radius_class);
#endif /* CONFIG_NO_RADIUS */
  entry->eap_type_authsrv = old_entry->eap_type_authsrv;
  if (old_entry->vlan_desc) {
    entry->vlan_desc = os_zalloc(sizeof(struct vlan_description));
    if (entry->vlan_desc)
      *entry->vlan_desc = *old_entry->vlan_desc;
  } else {
    entry->vlan_desc = NULL;
  }
  entry->opportunistic = 1;

  pmksa_cache_link_entry(pmksa, entry);

  return entry;
}


/**
 * pmksa_cache_auth_deinit - Free all entries in PMKSA cache
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 */
void pmksa_cache_auth_deinit(struct rsn_pmksa_cache *pmksa)
{
  struct rsn_pmksa_cache_entry *entry, *prev;
  int i;

  if (pmksa == NULL)
    return;

  entry = pmksa->pmksa;
  while (entry) {
    prev = entry;
    entry = entry->next;
    _pmksa_cache_free_entry(prev);
  }
  eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL);
  pmksa->pmksa_count = 0;
  pmksa->pmksa = NULL;
  for (i = 0; i < PMKID_HASH_SIZE; i++)
    pmksa->pmkid[i] = NULL;
  os_free(pmksa);
}


/**
 * pmksa_cache_auth_get - Fetch a PMKSA cache entry
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @spa: Supplicant address or %NULL to match any
 * @pmkid: PMKID or %NULL to match any
 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found
 */
struct rsn_pmksa_cache_entry *
pmksa_cache_auth_get(struct rsn_pmksa_cache *pmksa,
         const u8 *spa, const u8 *pmkid)
{
  struct rsn_pmksa_cache_entry *entry;

  if (pmkid) {
    for (entry = pmksa->pmkid[PMKID_HASH(pmkid)]; entry;
         entry = entry->hnext) {
      if ((spa == NULL ||
           ether_addr_equal(entry->spa, spa)) &&
          os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0)
        return entry;
    }
  } else {
    for (entry = pmksa->pmksa; entry; entry = entry->next) {
      if (spa == NULL ||
          ether_addr_equal(entry->spa, spa))
        return entry;
    }
  }

  return NULL;
}


/**
 * pmksa_cache_get_okc - Fetch a PMKSA cache entry using OKC
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @aa: Authenticator address
 * @spa: Supplicant address
 * @pmkid: PMKID
 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found
 *
 * Use opportunistic key caching (OKC) to find a PMK for a supplicant.
 */
struct rsn_pmksa_cache_entry * pmksa_cache_get_okc(
  struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *spa,
  const u8 *pmkid)
{
  struct rsn_pmksa_cache_entry *entry;
  u8 new_pmkid[PMKID_LEN];

  for (entry = pmksa->pmksa; entry; entry = entry->next) {
    if (!ether_addr_equal(entry->spa, spa))
      continue;
    if (wpa_key_mgmt_sae(entry->akmp) ||
        wpa_key_mgmt_fils(entry->akmp)) {
      if (os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0)
        return entry;
      continue;
    }
    if (entry->akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192 &&
        entry->kck_len > 0)
      rsn_pmkid_suite_b_192(entry->kck, entry->kck_len,
                aa, spa, new_pmkid);
    else if (wpa_key_mgmt_suite_b(entry->akmp) &&
       entry->kck_len > 0)
    rsn_pmkid_suite_b(entry->kck, entry->kck_len, aa, spa,
          new_pmkid);
    else
      rsn_pmkid(entry->pmk, entry->pmk_len, aa, spa,
          new_pmkid, entry->akmp);
    if (os_memcmp(new_pmkid, pmkid, PMKID_LEN) == 0)
      return entry;
  }
  return NULL;
}


/**
 * pmksa_cache_auth_init - Initialize PMKSA cache
 * @free_cb: Callback function to be called when a PMKSA cache entry is freed
 * @ctx: Context pointer for free_cb function
 * Returns: Pointer to PMKSA cache data or %NULL on failure
 */
struct rsn_pmksa_cache *
pmksa_cache_auth_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
              void *ctx), void *ctx)
{
  struct rsn_pmksa_cache *pmksa;

  pmksa = os_zalloc(sizeof(*pmksa));
  if (pmksa) {
    pmksa->free_cb = free_cb;
    pmksa->ctx = ctx;
  }

  return pmksa;
}


static int das_attr_match(struct rsn_pmksa_cache_entry *entry,
        struct radius_das_attrs *attr)
{
  int match = 0;

  if (attr->sta_addr) {
    if (!ether_addr_equal(attr->sta_addr, entry->spa))
      return 0;
    match++;
  }

  if (attr->acct_multi_session_id) {
    char buf[20];

    if (attr->acct_multi_session_id_len != 16)
      return 0;
    os_snprintf(buf, sizeof(buf), "%016llX",
          (unsigned long long) entry->acct_multi_session_id);
    if (os_memcmp(attr->acct_multi_session_id, buf, 16) != 0)
      return 0;
    match++;
  }

  if (attr->cui) {
    if (!entry->cui ||
        attr->cui_len != wpabuf_len(entry->cui) ||
        os_memcmp(attr->cui, wpabuf_head(entry->cui),
            attr->cui_len) != 0)
      return 0;
    match++;
  }

  if (attr->user_name) {
    if (!entry->identity ||
        attr->user_name_len != entry->identity_len ||
        os_memcmp(attr->user_name, entry->identity,
            attr->user_name_len) != 0)
      return 0;
    match++;
  }

  return match;
}


int pmksa_cache_auth_radius_das_disconnect(struct rsn_pmksa_cache *pmksa,
             struct radius_das_attrs *attr)
{
  int found = 0;
  struct rsn_pmksa_cache_entry *entry, *prev;

  if (attr->acct_session_id)
    return -1;

  entry = pmksa->pmksa;
  while (entry) {
    if (das_attr_match(entry, attr)) {
      found++;
      prev = entry;
      entry = entry->next;
      pmksa_cache_free_entry(pmksa, prev);
      continue;
    }
    entry = entry->next;
  }

  return found ? 0 : -1;
}


/**
 * pmksa_cache_auth_list - Dump text list of entries in PMKSA cache
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @buf: Buffer for the list
 * @len: Length of the buffer
 * @index: Externally stored index counter
 * Returns: Number of bytes written to buffer
 *
 * This function is used to generate a text format representation of the
 * current PMKSA cache contents for the ctrl_iface PMKSA command.
 */
int pmksa_cache_auth_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len,
        int *index)
{
  int ret;
  char *pos = buf;
  struct rsn_pmksa_cache_entry *entry;
  struct os_reltime now;

  os_get_reltime(&now);
  entry = pmksa->pmksa;
  while (entry) {
    ret = os_snprintf(pos, buf + len - pos, "%d " MACSTR " ",
          *index, MAC2STR(entry->spa));
    if (os_snprintf_error(buf + len - pos, ret))
      return pos - buf;
    pos += ret;
    pos += wpa_snprintf_hex(pos, buf + len - pos, entry->pmkid,
          PMKID_LEN);
    ret = os_snprintf(pos, buf + len - pos, " %d %d\n",
          (int) (entry->expiration - now.sec),
          entry->opportunistic);
    if (os_snprintf_error(buf + len - pos, ret))
      return pos - buf;
    pos += ret;
    entry = entry->next;
    (*index)++;
  }
  return pos - buf;
}


#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
#ifdef CONFIG_MESH

/**
 * pmksa_cache_auth_list_mesh - Dump text list of entries in PMKSA cache
 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
 * @addr: MAC address of the peer (NULL means any)
 * @buf: Buffer for the list
 * @len: Length of the buffer
 * Returns: Number of bytes written to buffer
 *
 * This function is used to generate a text format representation of the
 * current PMKSA cache contents for the ctrl_iface PMKSA_GET command to store
 * in external storage.
 */
int pmksa_cache_auth_list_mesh(struct rsn_pmksa_cache *pmksa, const u8 *addr,
             char *buf, size_t len)
{
  int ret;
  char *pos, *end;
  struct rsn_pmksa_cache_entry *entry;
  struct os_reltime now;

  pos = buf;
  end = buf + len;
  os_get_reltime(&now);


  /*
   * Entry format:
   * <BSSID> <PMKID> <PMK> <expiration in seconds>
   */
  for (entry = pmksa->pmksa; entry; entry = entry->next) {
    if (addr && !ether_addr_equal(entry->spa, addr))
      continue;

    ret = os_snprintf(pos, end - pos, MACSTR " ",
          MAC2STR(entry->spa));
    if (os_snprintf_error(end - pos, ret))
      return 0;
    pos += ret;

    pos += wpa_snprintf_hex(pos, end - pos, entry->pmkid,
          PMKID_LEN);

    ret = os_snprintf(pos, end - pos, " ");
    if (os_snprintf_error(end - pos, ret))
      return 0;
    pos += ret;

    pos += wpa_snprintf_hex(pos, end - pos, entry->pmk,
          entry->pmk_len);

    ret = os_snprintf(pos, end - pos, " %d\n",
          (int) (entry->expiration - now.sec));
    if (os_snprintf_error(end - pos, ret))
      return 0;
    pos += ret;
  }

  return pos - buf;
}

#endif /* CONFIG_MESH */
#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */

Coverage Report

Created: 2025-07-11 06:14