1 files changed, 0 insertions, 448 deletions
diff --git a/net/wireless/lib80211_crypt_ccmp.c b/net/wireless/lib80211_crypt_ccmp.c
deleted file mode 100644
index cca5e1cf089e..000000000000
--- a/net/wireless/lib80211_crypt_ccmp.c
+++ /dev/null
@@ -1,448 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * lib80211 crypt: host-based CCMP encryption implementation for lib80211
- *
- * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2008, John W. Linville <linville@tuxdriver.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/if_ether.h>
-#include <linux/if_arp.h>
-#include <asm/string.h>
-#include <linux/wireless.h>
-
-#include <linux/ieee80211.h>
-
-#include <linux/crypto.h>
-#include <crypto/aead.h>
-
-#include <net/lib80211.h>
-
-MODULE_AUTHOR("Jouni Malinen");
-MODULE_DESCRIPTION("Host AP crypt: CCMP");
-MODULE_LICENSE("GPL");
-
-#define AES_BLOCK_LEN 16
-#define CCMP_HDR_LEN 8
-#define CCMP_MIC_LEN 8
-#define CCMP_TK_LEN 16
-#define CCMP_PN_LEN 6
-
-struct lib80211_ccmp_data {
-	u8 key[CCMP_TK_LEN];
-	int key_set;
-
-	u8 tx_pn[CCMP_PN_LEN];
-	u8 rx_pn[CCMP_PN_LEN];
-
-	u32 dot11RSNAStatsCCMPFormatErrors;
-	u32 dot11RSNAStatsCCMPReplays;
-	u32 dot11RSNAStatsCCMPDecryptErrors;
-
-	int key_idx;
-
-	struct crypto_aead *tfm;
-
-	/* scratch buffers for virt_to_page() (crypto API) */
-	u8 tx_aad[2 * AES_BLOCK_LEN];
-	u8 rx_aad[2 * AES_BLOCK_LEN];
-};
-
-static void *lib80211_ccmp_init(int key_idx)
-{
-	struct lib80211_ccmp_data *priv;
-
-	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
-	if (priv == NULL)
-		goto fail;
-	priv->key_idx = key_idx;
-
-	priv->tfm = crypto_alloc_aead("ccm(aes)", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(priv->tfm)) {
-		priv->tfm = NULL;
-		goto fail;
-	}
-
-	return priv;
-
-      fail:
-	if (priv) {
-		if (priv->tfm)
-			crypto_free_aead(priv->tfm);
-		kfree(priv);
-	}
-
-	return NULL;
-}
-
-static void lib80211_ccmp_deinit(void *priv)
-{
-	struct lib80211_ccmp_data *_priv = priv;
-	if (_priv && _priv->tfm)
-		crypto_free_aead(_priv->tfm);
-	kfree(priv);
-}
-
-static int ccmp_init_iv_and_aad(const struct ieee80211_hdr *hdr,
-				const u8 *pn, u8 *iv, u8 *aad)
-{
-	u8 *pos, qc = 0;
-	size_t aad_len;
-	int a4_included, qc_included;
-
-	a4_included = ieee80211_has_a4(hdr->frame_control);
-	qc_included = ieee80211_is_data_qos(hdr->frame_control);
-
-	aad_len = 22;
-	if (a4_included)
-		aad_len += 6;
-	if (qc_included) {
-		pos = (u8 *) & hdr->addr4;
-		if (a4_included)
-			pos += 6;
-		qc = *pos & 0x0f;
-		aad_len += 2;
-	}
-
-	/* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
-	 * mode authentication are not allowed to collide, yet both are derived
-	 * from the same vector. We only set L := 1 here to indicate that the
-	 * data size can be represented in (L+1) bytes. The CCM layer will take
-	 * care of storing the data length in the top (L+1) bytes and setting
-	 * and clearing the other bits as is required to derive the two IVs.
-	 */
-	iv[0] = 0x1;
-
-	/* Nonce: QC | A2 | PN */
-	iv[1] = qc;
-	memcpy(iv + 2, hdr->addr2, ETH_ALEN);
-	memcpy(iv + 8, pn, CCMP_PN_LEN);
-
-	/* AAD:
-	 * FC with bits 4..6 and 11..13 masked to zero; 14 is always one
-	 * A1 | A2 | A3
-	 * SC with bits 4..15 (seq#) masked to zero
-	 * A4 (if present)
-	 * QC (if present)
-	 */
-	pos = (u8 *) hdr;
-	aad[0] = pos[0] & 0x8f;
-	aad[1] = pos[1] & 0xc7;
-	memcpy(aad + 2, &hdr->addrs, 3 * ETH_ALEN);
-	pos = (u8 *) & hdr->seq_ctrl;
-	aad[20] = pos[0] & 0x0f;
-	aad[21] = 0;		/* all bits masked */
-	memset(aad + 22, 0, 8);
-	if (a4_included)
-		memcpy(aad + 22, hdr->addr4, ETH_ALEN);
-	if (qc_included) {
-		aad[a4_included ? 28 : 22] = qc;
-		/* rest of QC masked */
-	}
-	return aad_len;
-}
-
-static int lib80211_ccmp_hdr(struct sk_buff *skb, int hdr_len,
-			      u8 *aeskey, int keylen, void *priv)
-{
-	struct lib80211_ccmp_data *key = priv;
-	int i;
-	u8 *pos;
-
-	if (skb_headroom(skb) < CCMP_HDR_LEN || skb->len < hdr_len)
-		return -1;
-
-	if (aeskey != NULL && keylen >= CCMP_TK_LEN)
-		memcpy(aeskey, key->key, CCMP_TK_LEN);
-
-	pos = skb_push(skb, CCMP_HDR_LEN);
-	memmove(pos, pos + CCMP_HDR_LEN, hdr_len);
-	pos += hdr_len;
-
-	i = CCMP_PN_LEN - 1;
-	while (i >= 0) {
-		key->tx_pn[i]++;
-		if (key->tx_pn[i] != 0)
-			break;
-		i--;
-	}
-
-	*pos++ = key->tx_pn[5];
-	*pos++ = key->tx_pn[4];
-	*pos++ = 0;
-	*pos++ = (key->key_idx << 6) | (1 << 5) /* Ext IV included */ ;
-	*pos++ = key->tx_pn[3];
-	*pos++ = key->tx_pn[2];
-	*pos++ = key->tx_pn[1];
-	*pos++ = key->tx_pn[0];
-
-	return CCMP_HDR_LEN;
-}
-
-static int lib80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
-{
-	struct lib80211_ccmp_data *key = priv;
-	struct ieee80211_hdr *hdr;
-	struct aead_request *req;
-	struct scatterlist sg[2];
-	u8 *aad = key->tx_aad;
-	u8 iv[AES_BLOCK_LEN];
-	int len, data_len, aad_len;
-	int ret;
-
-	if (skb_tailroom(skb) < CCMP_MIC_LEN || skb->len < hdr_len)
-		return -1;
-
-	data_len = skb->len - hdr_len;
-	len = lib80211_ccmp_hdr(skb, hdr_len, NULL, 0, priv);
-	if (len < 0)
-		return -1;
-
-	req = aead_request_alloc(key->tfm, GFP_ATOMIC);
-	if (!req)
-		return -ENOMEM;
-
-	hdr = (struct ieee80211_hdr *)skb->data;
-	aad_len = ccmp_init_iv_and_aad(hdr, key->tx_pn, iv, aad);
-
-	skb_put(skb, CCMP_MIC_LEN);
-
-	sg_init_table(sg, 2);
-	sg_set_buf(&sg[0], aad, aad_len);
-	sg_set_buf(&sg[1], skb->data + hdr_len + CCMP_HDR_LEN,
-		   data_len + CCMP_MIC_LEN);
-
-	aead_request_set_callback(req, 0, NULL, NULL);
-	aead_request_set_ad(req, aad_len);
-	aead_request_set_crypt(req, sg, sg, data_len, iv);
-
-	ret = crypto_aead_encrypt(req);
-	aead_request_free(req);
-
-	return ret;
-}
-
-/*
- * deal with seq counter wrapping correctly.
- * refer to timer_after() for jiffies wrapping handling
- */
-static inline int ccmp_replay_check(u8 *pn_n, u8 *pn_o)
-{
-	u32 iv32_n, iv16_n;
-	u32 iv32_o, iv16_o;
-
-	iv32_n = (pn_n[0] << 24) | (pn_n[1] << 16) | (pn_n[2] << 8) | pn_n[3];
-	iv16_n = (pn_n[4] << 8) | pn_n[5];
-
-	iv32_o = (pn_o[0] << 24) | (pn_o[1] << 16) | (pn_o[2] << 8) | pn_o[3];
-	iv16_o = (pn_o[4] << 8) | pn_o[5];
-
-	if ((s32)iv32_n - (s32)iv32_o < 0 ||
-	    (iv32_n == iv32_o && iv16_n <= iv16_o))
-		return 1;
-	return 0;
-}
-
-static int lib80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
-{
-	struct lib80211_ccmp_data *key = priv;
-	u8 keyidx, *pos;
-	struct ieee80211_hdr *hdr;
-	struct aead_request *req;
-	struct scatterlist sg[2];
-	u8 *aad = key->rx_aad;
-	u8 iv[AES_BLOCK_LEN];
-	u8 pn[6];
-	int aad_len, ret;
-	size_t data_len = skb->len - hdr_len - CCMP_HDR_LEN;
-
-	if (skb->len < hdr_len + CCMP_HDR_LEN + CCMP_MIC_LEN) {
-		key->dot11RSNAStatsCCMPFormatErrors++;
-		return -1;
-	}
-
-	hdr = (struct ieee80211_hdr *)skb->data;
-	pos = skb->data + hdr_len;
-	keyidx = pos[3];
-	if (!(keyidx & (1 << 5))) {
-		net_dbg_ratelimited("CCMP: received packet without ExtIV flag from %pM\n",
-				    hdr->addr2);
-		key->dot11RSNAStatsCCMPFormatErrors++;
-		return -2;
-	}
-	keyidx >>= 6;
-	if (key->key_idx != keyidx) {
-		net_dbg_ratelimited("CCMP: RX tkey->key_idx=%d frame keyidx=%d\n",
-				    key->key_idx, keyidx);
-		return -6;
-	}
-	if (!key->key_set) {
-		net_dbg_ratelimited("CCMP: received packet from %pM with keyid=%d that does not have a configured key\n",
-				    hdr->addr2, keyidx);
-		return -3;
-	}
-
-	pn[0] = pos[7];
-	pn[1] = pos[6];
-	pn[2] = pos[5];
-	pn[3] = pos[4];
-	pn[4] = pos[1];
-	pn[5] = pos[0];
-	pos += 8;
-
-	if (ccmp_replay_check(pn, key->rx_pn)) {
-#ifdef CONFIG_LIB80211_DEBUG
-		net_dbg_ratelimited("CCMP: replay detected: STA=%pM previous PN %02x%02x%02x%02x%02x%02x received PN %02x%02x%02x%02x%02x%02x\n",
-				    hdr->addr2,
-				    key->rx_pn[0], key->rx_pn[1], key->rx_pn[2],
-				    key->rx_pn[3], key->rx_pn[4], key->rx_pn[5],
-				    pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
-#endif
-		key->dot11RSNAStatsCCMPReplays++;
-		return -4;
-	}
-
-	req = aead_request_alloc(key->tfm, GFP_ATOMIC);
-	if (!req)
-		return -ENOMEM;
-
-	aad_len = ccmp_init_iv_and_aad(hdr, pn, iv, aad);
-
-	sg_init_table(sg, 2);
-	sg_set_buf(&sg[0], aad, aad_len);
-	sg_set_buf(&sg[1], pos, data_len);
-
-	aead_request_set_callback(req, 0, NULL, NULL);
-	aead_request_set_ad(req, aad_len);
-	aead_request_set_crypt(req, sg, sg, data_len, iv);
-
-	ret = crypto_aead_decrypt(req);
-	aead_request_free(req);
-
-	if (ret) {
-		net_dbg_ratelimited("CCMP: decrypt failed: STA=%pM (%d)\n",
-				    hdr->addr2, ret);
-		key->dot11RSNAStatsCCMPDecryptErrors++;
-		return -5;
-	}
-
-	memcpy(key->rx_pn, pn, CCMP_PN_LEN);
-
-	/* Remove hdr and MIC */
-	memmove(skb->data + CCMP_HDR_LEN, skb->data, hdr_len);
-	skb_pull(skb, CCMP_HDR_LEN);
-	skb_trim(skb, skb->len - CCMP_MIC_LEN);
-
-	return keyidx;
-}
-
-static int lib80211_ccmp_set_key(void *key, int len, u8 * seq, void *priv)
-{
-	struct lib80211_ccmp_data *data = priv;
-	int keyidx;
-	struct crypto_aead *tfm = data->tfm;
-
-	keyidx = data->key_idx;
-	memset(data, 0, sizeof(*data));
-	data->key_idx = keyidx;
-	data->tfm = tfm;
-	if (len == CCMP_TK_LEN) {
-		memcpy(data->key, key, CCMP_TK_LEN);
-		data->key_set = 1;
-		if (seq) {
-			data->rx_pn[0] = seq[5];
-			data->rx_pn[1] = seq[4];
-			data->rx_pn[2] = seq[3];
-			data->rx_pn[3] = seq[2];
-			data->rx_pn[4] = seq[1];
-			data->rx_pn[5] = seq[0];
-		}
-		if (crypto_aead_setauthsize(data->tfm, CCMP_MIC_LEN) ||
-		    crypto_aead_setkey(data->tfm, data->key, CCMP_TK_LEN))
-			return -1;
-	} else if (len == 0)
-		data->key_set = 0;
-	else
-		return -1;
-
-	return 0;
-}
-
-static int lib80211_ccmp_get_key(void *key, int len, u8 * seq, void *priv)
-{
-	struct lib80211_ccmp_data *data = priv;
-
-	if (len < CCMP_TK_LEN)
-		return -1;
-
-	if (!data->key_set)
-		return 0;
-	memcpy(key, data->key, CCMP_TK_LEN);
-
-	if (seq) {
-		seq[0] = data->tx_pn[5];
-		seq[1] = data->tx_pn[4];
-		seq[2] = data->tx_pn[3];
-		seq[3] = data->tx_pn[2];
-		seq[4] = data->tx_pn[1];
-		seq[5] = data->tx_pn[0];
-	}
-
-	return CCMP_TK_LEN;
-}
-
-static void lib80211_ccmp_print_stats(struct seq_file *m, void *priv)
-{
-	struct lib80211_ccmp_data *ccmp = priv;
-
-	seq_printf(m,
-		   "key[%d] alg=CCMP key_set=%d "
-		   "tx_pn=%02x%02x%02x%02x%02x%02x "
-		   "rx_pn=%02x%02x%02x%02x%02x%02x "
-		   "format_errors=%d replays=%d decrypt_errors=%d\n",
-		   ccmp->key_idx, ccmp->key_set,
-		   ccmp->tx_pn[0], ccmp->tx_pn[1], ccmp->tx_pn[2],
-		   ccmp->tx_pn[3], ccmp->tx_pn[4], ccmp->tx_pn[5],
-		   ccmp->rx_pn[0], ccmp->rx_pn[1], ccmp->rx_pn[2],
-		   ccmp->rx_pn[3], ccmp->rx_pn[4], ccmp->rx_pn[5],
-		   ccmp->dot11RSNAStatsCCMPFormatErrors,
-		   ccmp->dot11RSNAStatsCCMPReplays,
-		   ccmp->dot11RSNAStatsCCMPDecryptErrors);
-}
-
-static struct lib80211_crypto_ops lib80211_crypt_ccmp = {
-	.name = "CCMP",
-	.init = lib80211_ccmp_init,
-	.deinit = lib80211_ccmp_deinit,
-	.encrypt_mpdu = lib80211_ccmp_encrypt,
-	.decrypt_mpdu = lib80211_ccmp_decrypt,
-	.encrypt_msdu = NULL,
-	.decrypt_msdu = NULL,
-	.set_key = lib80211_ccmp_set_key,
-	.get_key = lib80211_ccmp_get_key,
-	.print_stats = lib80211_ccmp_print_stats,
-	.extra_mpdu_prefix_len = CCMP_HDR_LEN,
-	.extra_mpdu_postfix_len = CCMP_MIC_LEN,
-	.owner = THIS_MODULE,
-};
-
-static int __init lib80211_crypto_ccmp_init(void)
-{
-	return lib80211_register_crypto_ops(&lib80211_crypt_ccmp);
-}
-
-static void __exit lib80211_crypto_ccmp_exit(void)
-{
-	lib80211_unregister_crypto_ops(&lib80211_crypt_ccmp);
-}
-
-module_init(lib80211_crypto_ccmp_init);
-module_exit(lib80211_crypto_ccmp_exit);