From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- arch/arm64/crypto/ghash-ce-glue.c | 586 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 586 insertions(+) create mode 100644 arch/arm64/crypto/ghash-ce-glue.c (limited to 'arch/arm64/crypto/ghash-ce-glue.c') diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c new file mode 100644 index 000000000..97331b454 --- /dev/null +++ b/arch/arm64/crypto/ghash-ce-glue.c @@ -0,0 +1,586 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Accelerated GHASH implementation with ARMv8 PMULL instructions. + * + * Copyright (C) 2014 - 2018 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_DESCRIPTION("GHASH and AES-GCM using ARMv8 Crypto Extensions"); +MODULE_AUTHOR("Ard Biesheuvel "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS_CRYPTO("ghash"); + +#define GHASH_BLOCK_SIZE 16 +#define GHASH_DIGEST_SIZE 16 + +#define RFC4106_NONCE_SIZE 4 + +struct ghash_key { + be128 k; + u64 h[][2]; +}; + +struct ghash_desc_ctx { + u64 digest[GHASH_DIGEST_SIZE/sizeof(u64)]; + u8 buf[GHASH_BLOCK_SIZE]; + u32 count; +}; + +struct gcm_aes_ctx { + struct crypto_aes_ctx aes_key; + u8 nonce[RFC4106_NONCE_SIZE]; + struct ghash_key ghash_key; +}; + +asmlinkage void pmull_ghash_update_p64(int blocks, u64 dg[], const char *src, + u64 const h[][2], const char *head); + +asmlinkage void pmull_ghash_update_p8(int blocks, u64 dg[], const char *src, + u64 const h[][2], const char *head); + +asmlinkage void pmull_gcm_encrypt(int bytes, u8 dst[], const u8 src[], + u64 const h[][2], u64 dg[], u8 ctr[], + u32 const rk[], int rounds, u8 tag[]); +asmlinkage int pmull_gcm_decrypt(int bytes, u8 dst[], const u8 src[], + u64 const h[][2], u64 dg[], u8 ctr[], + u32 const rk[], int rounds, const u8 l[], + const u8 tag[], u64 authsize); + +static int ghash_init(struct shash_desc *desc) +{ + struct ghash_desc_ctx *ctx = shash_desc_ctx(desc); + + *ctx = (struct ghash_desc_ctx){}; + return 0; +} + +static void ghash_do_update(int blocks, u64 dg[], const char *src, + struct ghash_key *key, const char *head) +{ + be128 dst = { cpu_to_be64(dg[1]), cpu_to_be64(dg[0]) }; + + do { + const u8 *in = src; + + if (head) { + in = head; + blocks++; + head = NULL; + } else { + src += GHASH_BLOCK_SIZE; + } + + crypto_xor((u8 *)&dst, in, GHASH_BLOCK_SIZE); + gf128mul_lle(&dst, &key->k); + } while (--blocks); + + dg[0] = be64_to_cpu(dst.b); + dg[1] = be64_to_cpu(dst.a); +} + +static __always_inline +void ghash_do_simd_update(int blocks, u64 dg[], const char *src, + struct ghash_key *key, const char *head, + void (*simd_update)(int blocks, u64 dg[], + const char *src, + u64 const h[][2], + const char *head)) +{ + if (likely(crypto_simd_usable())) { + kernel_neon_begin(); + simd_update(blocks, dg, src, key->h, head); + kernel_neon_end(); + } else { + ghash_do_update(blocks, dg, src, key, head); + } +} + +/* avoid hogging the CPU for too long */ +#define MAX_BLOCKS (SZ_64K / GHASH_BLOCK_SIZE) + +static int ghash_update(struct shash_desc *desc, const u8 *src, + unsigned int len) +{ + struct ghash_desc_ctx *ctx = shash_desc_ctx(desc); + unsigned int partial = ctx->count % GHASH_BLOCK_SIZE; + + ctx->count += len; + + if ((partial + len) >= GHASH_BLOCK_SIZE) { + struct ghash_key *key = crypto_shash_ctx(desc->tfm); + int blocks; + + if (partial) { + int p = GHASH_BLOCK_SIZE - partial; + + memcpy(ctx->buf + partial, src, p); + src += p; + len -= p; + } + + blocks = len / GHASH_BLOCK_SIZE; + len %= GHASH_BLOCK_SIZE; + + do { + int chunk = min(blocks, MAX_BLOCKS); + + ghash_do_simd_update(chunk, ctx->digest, src, key, + partial ? ctx->buf : NULL, + pmull_ghash_update_p8); + + blocks -= chunk; + src += chunk * GHASH_BLOCK_SIZE; + partial = 0; + } while (unlikely(blocks > 0)); + } + if (len) + memcpy(ctx->buf + partial, src, len); + return 0; +} + +static int ghash_final(struct shash_desc *desc, u8 *dst) +{ + struct ghash_desc_ctx *ctx = shash_desc_ctx(desc); + unsigned int partial = ctx->count % GHASH_BLOCK_SIZE; + + if (partial) { + struct ghash_key *key = crypto_shash_ctx(desc->tfm); + + memset(ctx->buf + partial, 0, GHASH_BLOCK_SIZE - partial); + + ghash_do_simd_update(1, ctx->digest, ctx->buf, key, NULL, + pmull_ghash_update_p8); + } + put_unaligned_be64(ctx->digest[1], dst); + put_unaligned_be64(ctx->digest[0], dst + 8); + + memzero_explicit(ctx, sizeof(*ctx)); + return 0; +} + +static void ghash_reflect(u64 h[], const be128 *k) +{ + u64 carry = be64_to_cpu(k->a) & BIT(63) ? 1 : 0; + + h[0] = (be64_to_cpu(k->b) << 1) | carry; + h[1] = (be64_to_cpu(k->a) << 1) | (be64_to_cpu(k->b) >> 63); + + if (carry) + h[1] ^= 0xc200000000000000UL; +} + +static int ghash_setkey(struct crypto_shash *tfm, + const u8 *inkey, unsigned int keylen) +{ + struct ghash_key *key = crypto_shash_ctx(tfm); + + if (keylen != GHASH_BLOCK_SIZE) + return -EINVAL; + + /* needed for the fallback */ + memcpy(&key->k, inkey, GHASH_BLOCK_SIZE); + + ghash_reflect(key->h[0], &key->k); + return 0; +} + +static struct shash_alg ghash_alg = { + .base.cra_name = "ghash", + .base.cra_driver_name = "ghash-neon", + .base.cra_priority = 150, + .base.cra_blocksize = GHASH_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct ghash_key) + sizeof(u64[2]), + .base.cra_module = THIS_MODULE, + + .digestsize = GHASH_DIGEST_SIZE, + .init = ghash_init, + .update = ghash_update, + .final = ghash_final, + .setkey = ghash_setkey, + .descsize = sizeof(struct ghash_desc_ctx), +}; + +static int num_rounds(struct crypto_aes_ctx *ctx) +{ + /* + * # of rounds specified by AES: + * 128 bit key 10 rounds + * 192 bit key 12 rounds + * 256 bit key 14 rounds + * => n byte key => 6 + (n/4) rounds + */ + return 6 + ctx->key_length / 4; +} + +static int gcm_aes_setkey(struct crypto_aead *tfm, const u8 *inkey, + unsigned int keylen) +{ + struct gcm_aes_ctx *ctx = crypto_aead_ctx(tfm); + u8 key[GHASH_BLOCK_SIZE]; + be128 h; + int ret; + + ret = aes_expandkey(&ctx->aes_key, inkey, keylen); + if (ret) + return -EINVAL; + + aes_encrypt(&ctx->aes_key, key, (u8[AES_BLOCK_SIZE]){}); + + /* needed for the fallback */ + memcpy(&ctx->ghash_key.k, key, GHASH_BLOCK_SIZE); + + ghash_reflect(ctx->ghash_key.h[0], &ctx->ghash_key.k); + + h = ctx->ghash_key.k; + gf128mul_lle(&h, &ctx->ghash_key.k); + ghash_reflect(ctx->ghash_key.h[1], &h); + + gf128mul_lle(&h, &ctx->ghash_key.k); + ghash_reflect(ctx->ghash_key.h[2], &h); + + gf128mul_lle(&h, &ctx->ghash_key.k); + ghash_reflect(ctx->ghash_key.h[3], &h); + + return 0; +} + +static int gcm_aes_setauthsize(struct crypto_aead *tfm, unsigned int authsize) +{ + return crypto_gcm_check_authsize(authsize); +} + +static void gcm_update_mac(u64 dg[], const u8 *src, int count, u8 buf[], + int *buf_count, struct gcm_aes_ctx *ctx) +{ + if (*buf_count > 0) { + int buf_added = min(count, GHASH_BLOCK_SIZE - *buf_count); + + memcpy(&buf[*buf_count], src, buf_added); + + *buf_count += buf_added; + src += buf_added; + count -= buf_added; + } + + if (count >= GHASH_BLOCK_SIZE || *buf_count == GHASH_BLOCK_SIZE) { + int blocks = count / GHASH_BLOCK_SIZE; + + ghash_do_simd_update(blocks, dg, src, &ctx->ghash_key, + *buf_count ? buf : NULL, + pmull_ghash_update_p64); + + src += blocks * GHASH_BLOCK_SIZE; + count %= GHASH_BLOCK_SIZE; + *buf_count = 0; + } + + if (count > 0) { + memcpy(buf, src, count); + *buf_count = count; + } +} + +static void gcm_calculate_auth_mac(struct aead_request *req, u64 dg[], u32 len) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct gcm_aes_ctx *ctx = crypto_aead_ctx(aead); + u8 buf[GHASH_BLOCK_SIZE]; + struct scatter_walk walk; + int buf_count = 0; + + scatterwalk_start(&walk, req->src); + + do { + u32 n = scatterwalk_clamp(&walk, len); + u8 *p; + + if (!n) { + scatterwalk_start(&walk, sg_next(walk.sg)); + n = scatterwalk_clamp(&walk, len); + } + p = scatterwalk_map(&walk); + + gcm_update_mac(dg, p, n, buf, &buf_count, ctx); + len -= n; + + scatterwalk_unmap(p); + scatterwalk_advance(&walk, n); + scatterwalk_done(&walk, 0, len); + } while (len); + + if (buf_count) { + memset(&buf[buf_count], 0, GHASH_BLOCK_SIZE - buf_count); + ghash_do_simd_update(1, dg, buf, &ctx->ghash_key, NULL, + pmull_ghash_update_p64); + } +} + +static int gcm_encrypt(struct aead_request *req, char *iv, int assoclen) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct gcm_aes_ctx *ctx = crypto_aead_ctx(aead); + int nrounds = num_rounds(&ctx->aes_key); + struct skcipher_walk walk; + u8 buf[AES_BLOCK_SIZE]; + u64 dg[2] = {}; + be128 lengths; + u8 *tag; + int err; + + lengths.a = cpu_to_be64(assoclen * 8); + lengths.b = cpu_to_be64(req->cryptlen * 8); + + if (assoclen) + gcm_calculate_auth_mac(req, dg, assoclen); + + put_unaligned_be32(2, iv + GCM_AES_IV_SIZE); + + err = skcipher_walk_aead_encrypt(&walk, req, false); + + do { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + int nbytes = walk.nbytes; + + tag = (u8 *)&lengths; + + if (unlikely(nbytes > 0 && nbytes < AES_BLOCK_SIZE)) { + src = dst = memcpy(buf + sizeof(buf) - nbytes, + src, nbytes); + } else if (nbytes < walk.total) { + nbytes &= ~(AES_BLOCK_SIZE - 1); + tag = NULL; + } + + kernel_neon_begin(); + pmull_gcm_encrypt(nbytes, dst, src, ctx->ghash_key.h, + dg, iv, ctx->aes_key.key_enc, nrounds, + tag); + kernel_neon_end(); + + if (unlikely(!nbytes)) + break; + + if (unlikely(nbytes > 0 && nbytes < AES_BLOCK_SIZE)) + memcpy(walk.dst.virt.addr, + buf + sizeof(buf) - nbytes, nbytes); + + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } while (walk.nbytes); + + if (err) + return err; + + /* copy authtag to end of dst */ + scatterwalk_map_and_copy(tag, req->dst, req->assoclen + req->cryptlen, + crypto_aead_authsize(aead), 1); + + return 0; +} + +static int gcm_decrypt(struct aead_request *req, char *iv, int assoclen) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct gcm_aes_ctx *ctx = crypto_aead_ctx(aead); + unsigned int authsize = crypto_aead_authsize(aead); + int nrounds = num_rounds(&ctx->aes_key); + struct skcipher_walk walk; + u8 otag[AES_BLOCK_SIZE]; + u8 buf[AES_BLOCK_SIZE]; + u64 dg[2] = {}; + be128 lengths; + u8 *tag; + int ret; + int err; + + lengths.a = cpu_to_be64(assoclen * 8); + lengths.b = cpu_to_be64((req->cryptlen - authsize) * 8); + + if (assoclen) + gcm_calculate_auth_mac(req, dg, assoclen); + + put_unaligned_be32(2, iv + GCM_AES_IV_SIZE); + + scatterwalk_map_and_copy(otag, req->src, + req->assoclen + req->cryptlen - authsize, + authsize, 0); + + err = skcipher_walk_aead_decrypt(&walk, req, false); + + do { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + int nbytes = walk.nbytes; + + tag = (u8 *)&lengths; + + if (unlikely(nbytes > 0 && nbytes < AES_BLOCK_SIZE)) { + src = dst = memcpy(buf + sizeof(buf) - nbytes, + src, nbytes); + } else if (nbytes < walk.total) { + nbytes &= ~(AES_BLOCK_SIZE - 1); + tag = NULL; + } + + kernel_neon_begin(); + ret = pmull_gcm_decrypt(nbytes, dst, src, ctx->ghash_key.h, + dg, iv, ctx->aes_key.key_enc, + nrounds, tag, otag, authsize); + kernel_neon_end(); + + if (unlikely(!nbytes)) + break; + + if (unlikely(nbytes > 0 && nbytes < AES_BLOCK_SIZE)) + memcpy(walk.dst.virt.addr, + buf + sizeof(buf) - nbytes, nbytes); + + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } while (walk.nbytes); + + if (err) + return err; + + return ret ? -EBADMSG : 0; +} + +static int gcm_aes_encrypt(struct aead_request *req) +{ + u8 iv[AES_BLOCK_SIZE]; + + memcpy(iv, req->iv, GCM_AES_IV_SIZE); + return gcm_encrypt(req, iv, req->assoclen); +} + +static int gcm_aes_decrypt(struct aead_request *req) +{ + u8 iv[AES_BLOCK_SIZE]; + + memcpy(iv, req->iv, GCM_AES_IV_SIZE); + return gcm_decrypt(req, iv, req->assoclen); +} + +static int rfc4106_setkey(struct crypto_aead *tfm, const u8 *inkey, + unsigned int keylen) +{ + struct gcm_aes_ctx *ctx = crypto_aead_ctx(tfm); + int err; + + keylen -= RFC4106_NONCE_SIZE; + err = gcm_aes_setkey(tfm, inkey, keylen); + if (err) + return err; + + memcpy(ctx->nonce, inkey + keylen, RFC4106_NONCE_SIZE); + return 0; +} + +static int rfc4106_setauthsize(struct crypto_aead *tfm, unsigned int authsize) +{ + return crypto_rfc4106_check_authsize(authsize); +} + +static int rfc4106_encrypt(struct aead_request *req) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct gcm_aes_ctx *ctx = crypto_aead_ctx(aead); + u8 iv[AES_BLOCK_SIZE]; + + memcpy(iv, ctx->nonce, RFC4106_NONCE_SIZE); + memcpy(iv + RFC4106_NONCE_SIZE, req->iv, GCM_RFC4106_IV_SIZE); + + return crypto_ipsec_check_assoclen(req->assoclen) ?: + gcm_encrypt(req, iv, req->assoclen - GCM_RFC4106_IV_SIZE); +} + +static int rfc4106_decrypt(struct aead_request *req) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + struct gcm_aes_ctx *ctx = crypto_aead_ctx(aead); + u8 iv[AES_BLOCK_SIZE]; + + memcpy(iv, ctx->nonce, RFC4106_NONCE_SIZE); + memcpy(iv + RFC4106_NONCE_SIZE, req->iv, GCM_RFC4106_IV_SIZE); + + return crypto_ipsec_check_assoclen(req->assoclen) ?: + gcm_decrypt(req, iv, req->assoclen - GCM_RFC4106_IV_SIZE); +} + +static struct aead_alg gcm_aes_algs[] = {{ + .ivsize = GCM_AES_IV_SIZE, + .chunksize = AES_BLOCK_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + .setkey = gcm_aes_setkey, + .setauthsize = gcm_aes_setauthsize, + .encrypt = gcm_aes_encrypt, + .decrypt = gcm_aes_decrypt, + + .base.cra_name = "gcm(aes)", + .base.cra_driver_name = "gcm-aes-ce", + .base.cra_priority = 300, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct gcm_aes_ctx) + + 4 * sizeof(u64[2]), + .base.cra_module = THIS_MODULE, +}, { + .ivsize = GCM_RFC4106_IV_SIZE, + .chunksize = AES_BLOCK_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + .setkey = rfc4106_setkey, + .setauthsize = rfc4106_setauthsize, + .encrypt = rfc4106_encrypt, + .decrypt = rfc4106_decrypt, + + .base.cra_name = "rfc4106(gcm(aes))", + .base.cra_driver_name = "rfc4106-gcm-aes-ce", + .base.cra_priority = 300, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct gcm_aes_ctx) + + 4 * sizeof(u64[2]), + .base.cra_module = THIS_MODULE, +}}; + +static int __init ghash_ce_mod_init(void) +{ + if (!cpu_have_named_feature(ASIMD)) + return -ENODEV; + + if (cpu_have_named_feature(PMULL)) + return crypto_register_aeads(gcm_aes_algs, + ARRAY_SIZE(gcm_aes_algs)); + + return crypto_register_shash(&ghash_alg); +} + +static void __exit ghash_ce_mod_exit(void) +{ + if (cpu_have_named_feature(PMULL)) + crypto_unregister_aeads(gcm_aes_algs, ARRAY_SIZE(gcm_aes_algs)); + else + crypto_unregister_shash(&ghash_alg); +} + +static const struct cpu_feature __maybe_unused ghash_cpu_feature[] = { + { cpu_feature(PMULL) }, { } +}; +MODULE_DEVICE_TABLE(cpu, ghash_cpu_feature); + +module_init(ghash_ce_mod_init); +module_exit(ghash_ce_mod_exit); -- cgit v1.2.3