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dot11decrypt_util.h File Reference
`#include "dot11decrypt_int.h"`

Go to the source code of this file.

## Functions
void | dot11decrypt_construct_aad (PDOT11DECRYPT_MAC_FRAME wh, uint8_t *aad, size_t *aad_len)
bool | dot11decrypt_prf (const uint8_t *key, size_t key_len, const char *label, const uint8_t *context, size_t context_len, int hash_algo, uint8_t *output, size_t output_len)
bool | dot11decrypt_kdf (const uint8_t *key, size_t key_len, const char *label, const uint8_t *context, size_t context_len, int hash_algo, uint8_t *output, size_t output_len)
bool | dot11decrypt_derive_pmk_r0 (const uint8_t *xxkey, size_t xxkey_len, const uint8_t *ssid, size_t ssid_len, const uint8_t mdid[2], const uint8_t *r0kh_id, size_t r0kh_id_len, const uint8_t s0kh_id[DOT11DECRYPT_MAC_LEN], int hash_algo, uint8_t *pmk_r0, size_t *pmk_r0_len, uint8_t pmk_r0_name[16])
bool | dot11decrypt_derive_pmk_r1 (const uint8_t *pmk_r0, size_t pmk_r0_len, const uint8_t *pmk_r0_name, const uint8_t *r1kh_id, const uint8_t *s1kh_id, int hash_algo, uint8_t *pmk_r1, size_t *pmk_r1_len, uint8_t *pmk_r1_name)
bool | dot11decrypt_derive_ft_ptk (const uint8_t *pmk_r1, size_t pmk_r1_len, const uint8_t *pmk_r1_name, const uint8_t *snonce, const uint8_t *anonce, const uint8_t *bssid, const uint8_t *sta_addr, int hash_algo, uint8_t *ptk, const size_t ptk_len, uint8_t *ptk_name)

## Detailed Description

Copyright (c) 2002-2005 Sam Leffler, Errno Consulting Copyright (c) 2006 CACE Technologies, Davis (California) All rights reserved.

SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)

## Function Documentation

## ◆ dot11decrypt_derive_pmk_r0()

bool dot11decrypt_derive_pmk_r0 | ( | const uint8_t * | xxkey,
|  | size_t | xxkey_len,
|  | const uint8_t * | ssid,
|  | size_t | ssid_len,
|  | const uint8_t | mdid[2],
|  | const uint8_t * | r0kh_id,
|  | size_t | r0kh_id_len,
|  | const uint8_t | s0kh_id[DOT11DECRYPT_MAC_LEN],
|  | int | hash_algo,
|  | uint8_t * | pmk_r0,
|  | size_t * | pmk_r0_len,
|  | uint8_t | pmk_r0_name[16]
| ) |  |

Derive PMK-R0 and PMKR0Name. See IEEE 802.11-2016 12.7.1.7.3 PMK-R0

Parameters

  | xxkey | PSK / MPMK or certain part of MSK.
  | xxkey_len | Length of xxkey in bytes.
  | ssid | SSID
  | ssid_len | Length of SSID in bytes.
  | mdid | MDID (Mobility Domain Identifier).
  | r0kh_id | PMK-R0 key holder identifier in the Authenticator.
  | r0kh_id_len | Length of r0kh_id in bytes.
  | s0kh_id | PMK-R0 key holder in the Supplicant (STA mac address)
  | hash_algo | Hash algorithm to use for the KDF. See gcrypt available hash algorithms: https://gnupg.org/documentation/manuals/gcrypt/Available-hash-algorithms.html
  [out] | pmk_r0 | Pairwise master key, first level
  | pmk_r0_len | Length of pmk_r0 in bytes.
  [out] | pmk_r0_name | Pairwise master key (PMK) R0 name.

## ◆ dot11decrypt_derive_pmk_r1()

bool dot11decrypt_derive_pmk_r1 | ( | const uint8_t * | pmk_r0,
|  | size_t | pmk_r0_len,
|  | const uint8_t * | pmk_r0_name,
|  | const uint8_t * | r1kh_id,
|  | const uint8_t * | s1kh_id,
|  | int | hash_algo,
|  | uint8_t * | pmk_r1,
|  | size_t * | pmk_r1_len,
|  | uint8_t * | pmk_r1_name
| ) |  |

Derive PMK-R1 and PMKR1Name. See IEEE 802.11-2016 12.7.1.7.4 PMK-R1

## ◆ dot11decrypt_kdf()

bool dot11decrypt_kdf | ( | const uint8_t * | key,
|  | size_t | key_len,
|  | const char * | label,
|  | const uint8_t * | context,
|  | size_t | context_len,
|  | int | hash_algo,
|  | uint8_t * | output,
|  | size_t | output_len
| ) |  |

12.7.1.7.2 Key derivation function (KDF)

Parameters

  | key | Derivation input key.
  | key_len | Length of the key in bytes.
  | label | A string identifying the purpose of the keys derived using this KDF.
  | context | Provides context to identify the derived key.
  | context_len | Length of context in bytes.
  | hash_algo | Hash algorithm to use for the KDF. See gcrypt available hash algorithms: https://gnupg.org/documentation/manuals/gcrypt/Available-hash-algorithms.html
  [out] | output | Derived key.
  | output_len | Length of derived key in bytes.

Returns
  false on error