wifi: ipw2x00/lib80211: move remaining lib80211 into libipw

There's already much code in libipw that used to be shared
with more drivers, but now with the prior cleanups, those old
Intel ipw2x00 drivers are also the only ones using whatever is
now left of lib80211. Move lib80211 entirely into libipw.

Link: https://patch.msgid.link/20241007202707.915ef7b9e7c7.Ib9876d2fe3c90f11d6df458b16d0b7d4bf551a8d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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 5aad139130e1..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 const 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);