openbsd_wlan/net80211/ieee80211_crypto_tkip.c

71 	struct ieee80211_tkip_ctx *ctx;
73 	ctx = malloc(sizeof(*ctx), M_DEVBUF, M_NOWAIT | M_ZERO);
74 	if (ctx == NULL)
82 		ctx->txmic = &k->k_key[16];
83 		ctx->rxmic = &k->k_key[24];
87 		ctx->rxmic = &k->k_key[16];
88 		ctx->txmic = &k->k_key[24];
90 	k->k_priv = ctx;
124 	MICHAEL_CTX ctx;	/* small enough */
158 	michael_init(&ctx);
159 	michael_key(key, &ctx);
161 	michael_update(&ctx, (caddr_t)&wht, sizeof(wht));
168 		michael_update(&ctx, pos, len);
175 	michael_final(mic, &ctx);
188 	struct ieee80211_tkip_ctx *ctx = k->k_priv;
231 	if (!ctx->txttak_ok || (k->k_tsc & 0xffff) == 0) {
232 		Phase1(ctx->txttak, k->k_key, wh->i_addr2, k->k_tsc >> 16);
233 		ctx->txttak_ok = 1;
235 	Phase2((u_int8_t *)wepseed, k->k_key, ctx->txttak, k->k_tsc & 0xffff);
236 	rc4_keysetup(&ctx->rc4, (u_int8_t *)wepseed, 16);
271 		rc4_crypt(&ctx->rc4, mtod(m, caddr_t) + moff,
290 	ieee80211_tkip_mic(m0, hdrlen, ctx->txmic, mic);
292 	rc4_crypt(&ctx->rc4, mic, mic, IEEE80211_TKIP_MICLEN);
302 	rc4_crypt(&ctx->rc4, icvp, icvp, IEEE80211_WEP_CRCLEN);
356 	struct ieee80211_tkip_ctx *ctx = k->k_priv;
412 	if (!ctx->rxttak_ok || (tsc >> 16) != (*prsc >> 16)) {
413 		ctx->rxttak_ok = 0;	/* invalidate cached TTAK (if any) */
414 		Phase1(ctx->rxttak, k->k_key, wh->i_addr2, tsc >> 16);
416 	Phase2((u_int8_t *)wepseed, k->k_key, ctx->rxttak, tsc & 0xffff);
417 	rc4_keysetup(&ctx->rc4, (u_int8_t *)wepseed, 16);
451 		rc4_crypt(&ctx->rc4, mtod(m, caddr_t) + moff,
462 	rc4_crypt(&ctx->rc4, buf, buf, IEEE80211_TKIP_TAILLEN);
479 	ieee80211_tkip_mic(n0, hdrlen, ctx->rxmic, mic);
492 	ctx->rxttak_ok = 1;