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crypto: Update comment

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Denis Kenzior 2014-12-26 12:24:23 -06:00
parent f647e03166
commit dab93ef14a
1 changed files with 11 additions and 0 deletions
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src/crypto.c
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@ -115,6 +115,17 @@ int crypto_psk_from_passphrase(const char *passphrase,
* 802.11, Section 11.6.6.7: * 802.11, Section 11.6.6.7:
* PTK = PRF-X(PMK, "Pairwise key expansion", Min(AA, SA) || Max(AA, SA) || * PTK = PRF-X(PMK, "Pairwise key expansion", Min(AA, SA) || Max(AA, SA) ||
* Min(ANonce, SNonce) || Max(ANonce, SNonce)) * Min(ANonce, SNonce) || Max(ANonce, SNonce))
*
* 802.11, Section 11.6.1.3:
* The PTK shall be derived from the PMK by
* PTK ← PRF-X(PMK, “Pairwise key expansion”, Min(AA,SPA) || Max(AA,SPA) ||
* Min(ANonce,SNonce) || Max(ANonce,SNonce))
* where X = 256 + TK_bits. The value of TK_bits is cipher-suite dependent and
* is defined in Table 11-4. The Min and Max operations for IEEE 802 addresses
* are with the address converted to a positive integer treating the first
* transmitted octet as the most significant octet of the integer. The Min and
* Max operations for nonces are with the nonces treated as positive integers
* converted as specified in 8.2.2.
*/ */
bool crypto_derive_ptk(uint8_t *pmk, size_t pmk_len, const char *label, bool crypto_derive_ptk(uint8_t *pmk, size_t pmk_len, const char *label,
uint8_t *addr1, uint8_t *addr2, uint8_t *addr1, uint8_t *addr2,