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(). ... --- crypto/cts.c | 410 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 410 insertions(+) create mode 100644 crypto/cts.c (limited to 'crypto/cts.c') diff --git a/crypto/cts.c b/crypto/cts.c new file mode 100644 index 000000000..8f604f655 --- /dev/null +++ b/crypto/cts.c @@ -0,0 +1,410 @@ +/* + * CTS: Cipher Text Stealing mode + * + * COPYRIGHT (c) 2008 + * The Regents of the University of Michigan + * ALL RIGHTS RESERVED + * + * Permission is granted to use, copy, create derivative works + * and redistribute this software and such derivative works + * for any purpose, so long as the name of The University of + * Michigan is not used in any advertising or publicity + * pertaining to the use of distribution of this software + * without specific, written prior authorization. If the + * above copyright notice or any other identification of the + * University of Michigan is included in any copy of any + * portion of this software, then the disclaimer below must + * also be included. + * + * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION + * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY + * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF + * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING + * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE + * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE + * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR + * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING + * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN + * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGES. + */ + +/* Derived from various: + * Copyright (c) 2006 Herbert Xu + */ + +/* + * This is the Cipher Text Stealing mode as described by + * Section 8 of rfc2040 and referenced by rfc3962. + * rfc3962 includes errata information in its Appendix A. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct crypto_cts_ctx { + struct crypto_skcipher *child; +}; + +struct crypto_cts_reqctx { + struct scatterlist sg[2]; + unsigned offset; + struct skcipher_request subreq; +}; + +static inline u8 *crypto_cts_reqctx_space(struct skcipher_request *req) +{ + struct crypto_cts_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(tfm); + struct crypto_skcipher *child = ctx->child; + + return PTR_ALIGN((u8 *)(rctx + 1) + crypto_skcipher_reqsize(child), + crypto_skcipher_alignmask(tfm) + 1); +} + +static int crypto_cts_setkey(struct crypto_skcipher *parent, const u8 *key, + unsigned int keylen) +{ + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(parent); + struct crypto_skcipher *child = ctx->child; + + crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); + crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) & + CRYPTO_TFM_REQ_MASK); + return crypto_skcipher_setkey(child, key, keylen); +} + +static void cts_cbc_crypt_done(void *data, int err) +{ + struct skcipher_request *req = data; + + if (err == -EINPROGRESS) + return; + + skcipher_request_complete(req, err); +} + +static int cts_cbc_encrypt(struct skcipher_request *req) +{ + struct crypto_cts_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct skcipher_request *subreq = &rctx->subreq; + int bsize = crypto_skcipher_blocksize(tfm); + u8 d[MAX_CIPHER_BLOCKSIZE * 2] __aligned(__alignof__(u32)); + struct scatterlist *sg; + unsigned int offset; + int lastn; + + offset = rctx->offset; + lastn = req->cryptlen - offset; + + sg = scatterwalk_ffwd(rctx->sg, req->dst, offset - bsize); + scatterwalk_map_and_copy(d + bsize, sg, 0, bsize, 0); + + memset(d, 0, bsize); + scatterwalk_map_and_copy(d, req->src, offset, lastn, 0); + + scatterwalk_map_and_copy(d, sg, 0, bsize + lastn, 1); + memzero_explicit(d, sizeof(d)); + + skcipher_request_set_callback(subreq, req->base.flags & + CRYPTO_TFM_REQ_MAY_BACKLOG, + cts_cbc_crypt_done, req); + skcipher_request_set_crypt(subreq, sg, sg, bsize, req->iv); + return crypto_skcipher_encrypt(subreq); +} + +static void crypto_cts_encrypt_done(void *data, int err) +{ + struct skcipher_request *req = data; + + if (err) + goto out; + + err = cts_cbc_encrypt(req); + if (err == -EINPROGRESS || err == -EBUSY) + return; + +out: + skcipher_request_complete(req, err); +} + +static int crypto_cts_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_cts_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_request *subreq = &rctx->subreq; + int bsize = crypto_skcipher_blocksize(tfm); + unsigned int nbytes = req->cryptlen; + unsigned int offset; + + skcipher_request_set_tfm(subreq, ctx->child); + + if (nbytes < bsize) + return -EINVAL; + + if (nbytes == bsize) { + skcipher_request_set_callback(subreq, req->base.flags, + req->base.complete, + req->base.data); + skcipher_request_set_crypt(subreq, req->src, req->dst, nbytes, + req->iv); + return crypto_skcipher_encrypt(subreq); + } + + offset = rounddown(nbytes - 1, bsize); + rctx->offset = offset; + + skcipher_request_set_callback(subreq, req->base.flags, + crypto_cts_encrypt_done, req); + skcipher_request_set_crypt(subreq, req->src, req->dst, + offset, req->iv); + + return crypto_skcipher_encrypt(subreq) ?: + cts_cbc_encrypt(req); +} + +static int cts_cbc_decrypt(struct skcipher_request *req) +{ + struct crypto_cts_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct skcipher_request *subreq = &rctx->subreq; + int bsize = crypto_skcipher_blocksize(tfm); + u8 d[MAX_CIPHER_BLOCKSIZE * 2] __aligned(__alignof__(u32)); + struct scatterlist *sg; + unsigned int offset; + u8 *space; + int lastn; + + offset = rctx->offset; + lastn = req->cryptlen - offset; + + sg = scatterwalk_ffwd(rctx->sg, req->dst, offset - bsize); + + /* 1. Decrypt Cn-1 (s) to create Dn */ + scatterwalk_map_and_copy(d + bsize, sg, 0, bsize, 0); + space = crypto_cts_reqctx_space(req); + crypto_xor(d + bsize, space, bsize); + /* 2. Pad Cn with zeros at the end to create C of length BB */ + memset(d, 0, bsize); + scatterwalk_map_and_copy(d, req->src, offset, lastn, 0); + /* 3. Exclusive-or Dn with C to create Xn */ + /* 4. Select the first Ln bytes of Xn to create Pn */ + crypto_xor(d + bsize, d, lastn); + + /* 5. Append the tail (BB - Ln) bytes of Xn to Cn to create En */ + memcpy(d + lastn, d + bsize + lastn, bsize - lastn); + /* 6. Decrypt En to create Pn-1 */ + + scatterwalk_map_and_copy(d, sg, 0, bsize + lastn, 1); + memzero_explicit(d, sizeof(d)); + + skcipher_request_set_callback(subreq, req->base.flags & + CRYPTO_TFM_REQ_MAY_BACKLOG, + cts_cbc_crypt_done, req); + + skcipher_request_set_crypt(subreq, sg, sg, bsize, space); + return crypto_skcipher_decrypt(subreq); +} + +static void crypto_cts_decrypt_done(void *data, int err) +{ + struct skcipher_request *req = data; + + if (err) + goto out; + + err = cts_cbc_decrypt(req); + if (err == -EINPROGRESS || err == -EBUSY) + return; + +out: + skcipher_request_complete(req, err); +} + +static int crypto_cts_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_cts_reqctx *rctx = skcipher_request_ctx(req); + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_request *subreq = &rctx->subreq; + int bsize = crypto_skcipher_blocksize(tfm); + unsigned int nbytes = req->cryptlen; + unsigned int offset; + u8 *space; + + skcipher_request_set_tfm(subreq, ctx->child); + + if (nbytes < bsize) + return -EINVAL; + + if (nbytes == bsize) { + skcipher_request_set_callback(subreq, req->base.flags, + req->base.complete, + req->base.data); + skcipher_request_set_crypt(subreq, req->src, req->dst, nbytes, + req->iv); + return crypto_skcipher_decrypt(subreq); + } + + skcipher_request_set_callback(subreq, req->base.flags, + crypto_cts_decrypt_done, req); + + space = crypto_cts_reqctx_space(req); + + offset = rounddown(nbytes - 1, bsize); + rctx->offset = offset; + + if (offset <= bsize) + memcpy(space, req->iv, bsize); + else + scatterwalk_map_and_copy(space, req->src, offset - 2 * bsize, + bsize, 0); + + skcipher_request_set_crypt(subreq, req->src, req->dst, + offset, req->iv); + + return crypto_skcipher_decrypt(subreq) ?: + cts_cbc_decrypt(req); +} + +static int crypto_cts_init_tfm(struct crypto_skcipher *tfm) +{ + struct skcipher_instance *inst = skcipher_alg_instance(tfm); + struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst); + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(tfm); + struct crypto_skcipher *cipher; + unsigned reqsize; + unsigned bsize; + unsigned align; + + cipher = crypto_spawn_skcipher(spawn); + if (IS_ERR(cipher)) + return PTR_ERR(cipher); + + ctx->child = cipher; + + align = crypto_skcipher_alignmask(tfm); + bsize = crypto_skcipher_blocksize(cipher); + reqsize = ALIGN(sizeof(struct crypto_cts_reqctx) + + crypto_skcipher_reqsize(cipher), + crypto_tfm_ctx_alignment()) + + (align & ~(crypto_tfm_ctx_alignment() - 1)) + bsize; + + crypto_skcipher_set_reqsize(tfm, reqsize); + + return 0; +} + +static void crypto_cts_exit_tfm(struct crypto_skcipher *tfm) +{ + struct crypto_cts_ctx *ctx = crypto_skcipher_ctx(tfm); + + crypto_free_skcipher(ctx->child); +} + +static void crypto_cts_free(struct skcipher_instance *inst) +{ + crypto_drop_skcipher(skcipher_instance_ctx(inst)); + kfree(inst); +} + +static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) +{ + struct crypto_skcipher_spawn *spawn; + struct skcipher_instance *inst; + struct skcipher_alg *alg; + u32 mask; + int err; + + err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER, &mask); + if (err) + return err; + + inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); + if (!inst) + return -ENOMEM; + + spawn = skcipher_instance_ctx(inst); + + err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), 0, mask); + if (err) + goto err_free_inst; + + alg = crypto_spawn_skcipher_alg(spawn); + + err = -EINVAL; + if (crypto_skcipher_alg_ivsize(alg) != alg->base.cra_blocksize) + goto err_free_inst; + + if (strncmp(alg->base.cra_name, "cbc(", 4)) + goto err_free_inst; + + err = crypto_inst_setname(skcipher_crypto_instance(inst), "cts", + &alg->base); + if (err) + goto err_free_inst; + + inst->alg.base.cra_priority = alg->base.cra_priority; + inst->alg.base.cra_blocksize = alg->base.cra_blocksize; + inst->alg.base.cra_alignmask = alg->base.cra_alignmask; + + inst->alg.ivsize = alg->base.cra_blocksize; + inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); + inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); + inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); + + inst->alg.base.cra_ctxsize = sizeof(struct crypto_cts_ctx); + + inst->alg.init = crypto_cts_init_tfm; + inst->alg.exit = crypto_cts_exit_tfm; + + inst->alg.setkey = crypto_cts_setkey; + inst->alg.encrypt = crypto_cts_encrypt; + inst->alg.decrypt = crypto_cts_decrypt; + + inst->free = crypto_cts_free; + + err = skcipher_register_instance(tmpl, inst); + if (err) { +err_free_inst: + crypto_cts_free(inst); + } + return err; +} + +static struct crypto_template crypto_cts_tmpl = { + .name = "cts", + .create = crypto_cts_create, + .module = THIS_MODULE, +}; + +static int __init crypto_cts_module_init(void) +{ + return crypto_register_template(&crypto_cts_tmpl); +} + +static void __exit crypto_cts_module_exit(void) +{ + crypto_unregister_template(&crypto_cts_tmpl); +} + +subsys_initcall(crypto_cts_module_init); +module_exit(crypto_cts_module_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("CTS-CBC CipherText Stealing for CBC"); +MODULE_ALIAS_CRYPTO("cts"); -- cgit v1.2.3