diff options
Diffstat (limited to 'package/kernel/mac80211/patches/131-Revert-mac80211-aes-cmac-switch-to-shash-CMAC-driver.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/131-Revert-mac80211-aes-cmac-switch-to-shash-CMAC-driver.patch | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/131-Revert-mac80211-aes-cmac-switch-to-shash-CMAC-driver.patch b/package/kernel/mac80211/patches/131-Revert-mac80211-aes-cmac-switch-to-shash-CMAC-driver.patch new file mode 100644 index 0000000..f2bee9b --- /dev/null +++ b/package/kernel/mac80211/patches/131-Revert-mac80211-aes-cmac-switch-to-shash-CMAC-driver.patch @@ -0,0 +1,198 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Sat, 7 Oct 2017 09:37:28 +0200 +Subject: [PATCH] Revert "mac80211: aes-cmac: switch to shash CMAC + driver" + +This reverts commit 26717828b75dd5c46e97f7f4a9b937d038bb2852. +Reduces mac80211 dependencies for LEDE + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/mac80211/aes_cmac.c ++++ b/net/mac80211/aes_cmac.c +@@ -22,50 +22,126 @@ + #define CMAC_TLEN_256 16 /* CMAC TLen = 128 bits (16 octets) */ + #define AAD_LEN 20 + +-static const u8 zero[CMAC_TLEN_256]; + +-void ieee80211_aes_cmac(struct crypto_shash *tfm, const u8 *aad, +- const u8 *data, size_t data_len, u8 *mic) ++void gf_mulx(u8 *pad) + { +- SHASH_DESC_ON_STACK(desc, tfm); +- u8 out[AES_BLOCK_SIZE]; ++ int i, carry; + +- desc->tfm = tfm; ++ carry = pad[0] & 0x80; ++ for (i = 0; i < AES_BLOCK_SIZE - 1; i++) ++ pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7); ++ pad[AES_BLOCK_SIZE - 1] <<= 1; ++ if (carry) ++ pad[AES_BLOCK_SIZE - 1] ^= 0x87; ++} + +- crypto_shash_init(desc); +- crypto_shash_update(desc, aad, AAD_LEN); +- crypto_shash_update(desc, data, data_len - CMAC_TLEN); +- crypto_shash_finup(desc, zero, CMAC_TLEN, out); ++void aes_cmac_vector(struct crypto_cipher *tfm, size_t num_elem, ++ const u8 *addr[], const size_t *len, u8 *mac, ++ size_t mac_len) ++{ ++ u8 cbc[AES_BLOCK_SIZE], pad[AES_BLOCK_SIZE]; ++ const u8 *pos, *end; ++ size_t i, e, left, total_len; + +- memcpy(mic, out, CMAC_TLEN); ++ memset(cbc, 0, AES_BLOCK_SIZE); ++ ++ total_len = 0; ++ for (e = 0; e < num_elem; e++) ++ total_len += len[e]; ++ left = total_len; ++ ++ e = 0; ++ pos = addr[0]; ++ end = pos + len[0]; ++ ++ while (left >= AES_BLOCK_SIZE) { ++ for (i = 0; i < AES_BLOCK_SIZE; i++) { ++ cbc[i] ^= *pos++; ++ if (pos >= end) { ++ e++; ++ pos = addr[e]; ++ end = pos + len[e]; ++ } ++ } ++ if (left > AES_BLOCK_SIZE) ++ crypto_cipher_encrypt_one(tfm, cbc, cbc); ++ left -= AES_BLOCK_SIZE; ++ } ++ ++ memset(pad, 0, AES_BLOCK_SIZE); ++ crypto_cipher_encrypt_one(tfm, pad, pad); ++ gf_mulx(pad); ++ ++ if (left || total_len == 0) { ++ for (i = 0; i < left; i++) { ++ cbc[i] ^= *pos++; ++ if (pos >= end) { ++ e++; ++ pos = addr[e]; ++ end = pos + len[e]; ++ } ++ } ++ cbc[left] ^= 0x80; ++ gf_mulx(pad); ++ } ++ ++ for (i = 0; i < AES_BLOCK_SIZE; i++) ++ pad[i] ^= cbc[i]; ++ crypto_cipher_encrypt_one(tfm, pad, pad); ++ memcpy(mac, pad, mac_len); + } + +-void ieee80211_aes_cmac_256(struct crypto_shash *tfm, const u8 *aad, ++ ++void ieee80211_aes_cmac(struct crypto_cipher *tfm, const u8 *aad, ++ const u8 *data, size_t data_len, u8 *mic) ++{ ++ const u8 *addr[3]; ++ size_t len[3]; ++ u8 zero[CMAC_TLEN]; ++ ++ memset(zero, 0, CMAC_TLEN); ++ addr[0] = aad; ++ len[0] = AAD_LEN; ++ addr[1] = data; ++ len[1] = data_len - CMAC_TLEN; ++ addr[2] = zero; ++ len[2] = CMAC_TLEN; ++ ++ aes_cmac_vector(tfm, 3, addr, len, mic, CMAC_TLEN); ++} ++ ++void ieee80211_aes_cmac_256(struct crypto_cipher *tfm, const u8 *aad, + const u8 *data, size_t data_len, u8 *mic) + { +- SHASH_DESC_ON_STACK(desc, tfm); ++ const u8 *addr[3]; ++ size_t len[3]; ++ u8 zero[CMAC_TLEN_256]; + +- desc->tfm = tfm; ++ memset(zero, 0, CMAC_TLEN_256); ++ addr[0] = aad; ++ len[0] = AAD_LEN; ++ addr[1] = data; ++ len[1] = data_len - CMAC_TLEN_256; ++ addr[2] = zero; ++ len[2] = CMAC_TLEN_256; + +- crypto_shash_init(desc); +- crypto_shash_update(desc, aad, AAD_LEN); +- crypto_shash_update(desc, data, data_len - CMAC_TLEN_256); +- crypto_shash_finup(desc, zero, CMAC_TLEN_256, mic); ++ aes_cmac_vector(tfm, 3, addr, len, mic, CMAC_TLEN_256); + } + +-struct crypto_shash *ieee80211_aes_cmac_key_setup(const u8 key[], +- size_t key_len) ++struct crypto_cipher *ieee80211_aes_cmac_key_setup(const u8 key[], ++ size_t key_len) + { +- struct crypto_shash *tfm; ++ struct crypto_cipher *tfm; + +- tfm = crypto_alloc_shash("cmac(aes)", 0, 0); ++ tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC); + if (!IS_ERR(tfm)) +- crypto_shash_setkey(tfm, key, key_len); ++ crypto_cipher_setkey(tfm, key, key_len); + + return tfm; + } + +-void ieee80211_aes_cmac_key_free(struct crypto_shash *tfm) ++ ++void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm) + { +- crypto_free_shash(tfm); ++ crypto_free_cipher(tfm); + } +--- a/net/mac80211/aes_cmac.h ++++ b/net/mac80211/aes_cmac.h +@@ -10,14 +10,13 @@ + #define AES_CMAC_H + + #include <linux/crypto.h> +-#include <crypto/hash.h> + +-struct crypto_shash *ieee80211_aes_cmac_key_setup(const u8 key[], +- size_t key_len); +-void ieee80211_aes_cmac(struct crypto_shash *tfm, const u8 *aad, ++struct crypto_cipher *ieee80211_aes_cmac_key_setup(const u8 key[], ++ size_t key_len); ++void ieee80211_aes_cmac(struct crypto_cipher *tfm, const u8 *aad, + const u8 *data, size_t data_len, u8 *mic); +-void ieee80211_aes_cmac_256(struct crypto_shash *tfm, const u8 *aad, ++void ieee80211_aes_cmac_256(struct crypto_cipher *tfm, const u8 *aad, + const u8 *data, size_t data_len, u8 *mic); +-void ieee80211_aes_cmac_key_free(struct crypto_shash *tfm); ++void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm); + + #endif /* AES_CMAC_H */ +--- a/net/mac80211/key.h ++++ b/net/mac80211/key.h +@@ -93,7 +93,7 @@ struct ieee80211_key { + } ccmp; + struct { + u8 rx_pn[IEEE80211_CMAC_PN_LEN]; +- struct crypto_shash *tfm; ++ struct crypto_cipher *tfm; + u32 replays; /* dot11RSNAStatsCMACReplays */ + u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ + } aes_cmac; |