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/sm2.c | 460 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 460 insertions(+) create mode 100644 crypto/sm2.c (limited to 'crypto/sm2.c') diff --git a/crypto/sm2.c b/crypto/sm2.c new file mode 100644 index 000000000..ed9307dac --- /dev/null +++ b/crypto/sm2.c @@ -0,0 +1,460 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SM2 asymmetric public-key algorithm + * as specified by OSCCA GM/T 0003.1-2012 -- 0003.5-2012 SM2 and + * described at https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02 + * + * Copyright (c) 2020, Alibaba Group. + * Authors: Tianjia Zhang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "sm2signature.asn1.h" + +#define MPI_NBYTES(m) ((mpi_get_nbits(m) + 7) / 8) + +struct ecc_domain_parms { + const char *desc; /* Description of the curve. */ + unsigned int nbits; /* Number of bits. */ + unsigned int fips:1; /* True if this is a FIPS140-2 approved curve */ + + /* The model describing this curve. This is mainly used to select + * the group equation. + */ + enum gcry_mpi_ec_models model; + + /* The actual ECC dialect used. This is used for curve specific + * optimizations and to select encodings etc. + */ + enum ecc_dialects dialect; + + const char *p; /* The prime defining the field. */ + const char *a, *b; /* The coefficients. For Twisted Edwards + * Curves b is used for d. For Montgomery + * Curves (a,b) has ((A-2)/4,B^-1). + */ + const char *n; /* The order of the base point. */ + const char *g_x, *g_y; /* Base point. */ + unsigned int h; /* Cofactor. */ +}; + +static const struct ecc_domain_parms sm2_ecp = { + .desc = "sm2p256v1", + .nbits = 256, + .fips = 0, + .model = MPI_EC_WEIERSTRASS, + .dialect = ECC_DIALECT_STANDARD, + .p = "0xfffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff", + .a = "0xfffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc", + .b = "0x28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93", + .n = "0xfffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123", + .g_x = "0x32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7", + .g_y = "0xbc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0", + .h = 1 +}; + +static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec) +{ + const struct ecc_domain_parms *ecp = &sm2_ecp; + MPI p, a, b; + MPI x, y; + int rc = -EINVAL; + + p = mpi_scanval(ecp->p); + a = mpi_scanval(ecp->a); + b = mpi_scanval(ecp->b); + if (!p || !a || !b) + goto free_p; + + x = mpi_scanval(ecp->g_x); + y = mpi_scanval(ecp->g_y); + if (!x || !y) + goto free; + + rc = -ENOMEM; + + ec->Q = mpi_point_new(0); + if (!ec->Q) + goto free; + + /* mpi_ec_setup_elliptic_curve */ + ec->G = mpi_point_new(0); + if (!ec->G) { + mpi_point_release(ec->Q); + goto free; + } + + mpi_set(ec->G->x, x); + mpi_set(ec->G->y, y); + mpi_set_ui(ec->G->z, 1); + + rc = -EINVAL; + ec->n = mpi_scanval(ecp->n); + if (!ec->n) { + mpi_point_release(ec->Q); + mpi_point_release(ec->G); + goto free; + } + + ec->h = ecp->h; + ec->name = ecp->desc; + mpi_ec_init(ec, ecp->model, ecp->dialect, 0, p, a, b); + + rc = 0; + +free: + mpi_free(x); + mpi_free(y); +free_p: + mpi_free(p); + mpi_free(a); + mpi_free(b); + + return rc; +} + +static void sm2_ec_ctx_deinit(struct mpi_ec_ctx *ec) +{ + mpi_ec_deinit(ec); + + memset(ec, 0, sizeof(*ec)); +} + +/* RESULT must have been initialized and is set on success to the + * point given by VALUE. + */ +static int sm2_ecc_os2ec(MPI_POINT result, MPI value) +{ + int rc; + size_t n; + unsigned char *buf; + MPI x, y; + + n = MPI_NBYTES(value); + buf = kmalloc(n, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + rc = mpi_print(GCRYMPI_FMT_USG, buf, n, &n, value); + if (rc) + goto err_freebuf; + + rc = -EINVAL; + if (n < 1 || ((n - 1) % 2)) + goto err_freebuf; + /* No support for point compression */ + if (*buf != 0x4) + goto err_freebuf; + + rc = -ENOMEM; + n = (n - 1) / 2; + x = mpi_read_raw_data(buf + 1, n); + if (!x) + goto err_freebuf; + y = mpi_read_raw_data(buf + 1 + n, n); + if (!y) + goto err_freex; + + mpi_normalize(x); + mpi_normalize(y); + mpi_set(result->x, x); + mpi_set(result->y, y); + mpi_set_ui(result->z, 1); + + rc = 0; + + mpi_free(y); +err_freex: + mpi_free(x); +err_freebuf: + kfree(buf); + return rc; +} + +struct sm2_signature_ctx { + MPI sig_r; + MPI sig_s; +}; + +int sm2_get_signature_r(void *context, size_t hdrlen, unsigned char tag, + const void *value, size_t vlen) +{ + struct sm2_signature_ctx *sig = context; + + if (!value || !vlen) + return -EINVAL; + + sig->sig_r = mpi_read_raw_data(value, vlen); + if (!sig->sig_r) + return -ENOMEM; + + return 0; +} + +int sm2_get_signature_s(void *context, size_t hdrlen, unsigned char tag, + const void *value, size_t vlen) +{ + struct sm2_signature_ctx *sig = context; + + if (!value || !vlen) + return -EINVAL; + + sig->sig_s = mpi_read_raw_data(value, vlen); + if (!sig->sig_s) + return -ENOMEM; + + return 0; +} + +static int sm2_z_digest_update(struct sm3_state *sctx, + MPI m, unsigned int pbytes) +{ + static const unsigned char zero[32]; + unsigned char *in; + unsigned int inlen; + + in = mpi_get_buffer(m, &inlen, NULL); + if (!in) + return -EINVAL; + + if (inlen < pbytes) { + /* padding with zero */ + sm3_update(sctx, zero, pbytes - inlen); + sm3_update(sctx, in, inlen); + } else if (inlen > pbytes) { + /* skip the starting zero */ + sm3_update(sctx, in + inlen - pbytes, pbytes); + } else { + sm3_update(sctx, in, inlen); + } + + kfree(in); + return 0; +} + +static int sm2_z_digest_update_point(struct sm3_state *sctx, + MPI_POINT point, struct mpi_ec_ctx *ec, unsigned int pbytes) +{ + MPI x, y; + int ret = -EINVAL; + + x = mpi_new(0); + y = mpi_new(0); + + if (!mpi_ec_get_affine(x, y, point, ec) && + !sm2_z_digest_update(sctx, x, pbytes) && + !sm2_z_digest_update(sctx, y, pbytes)) + ret = 0; + + mpi_free(x); + mpi_free(y); + return ret; +} + +int sm2_compute_z_digest(struct crypto_akcipher *tfm, + const unsigned char *id, size_t id_len, + unsigned char dgst[SM3_DIGEST_SIZE]) +{ + struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm); + uint16_t bits_len; + unsigned char entl[2]; + struct sm3_state sctx; + unsigned int pbytes; + + if (id_len > (USHRT_MAX / 8) || !ec->Q) + return -EINVAL; + + bits_len = (uint16_t)(id_len * 8); + entl[0] = bits_len >> 8; + entl[1] = bits_len & 0xff; + + pbytes = MPI_NBYTES(ec->p); + + /* ZA = H256(ENTLA | IDA | a | b | xG | yG | xA | yA) */ + sm3_init(&sctx); + sm3_update(&sctx, entl, 2); + sm3_update(&sctx, id, id_len); + + if (sm2_z_digest_update(&sctx, ec->a, pbytes) || + sm2_z_digest_update(&sctx, ec->b, pbytes) || + sm2_z_digest_update_point(&sctx, ec->G, ec, pbytes) || + sm2_z_digest_update_point(&sctx, ec->Q, ec, pbytes)) + return -EINVAL; + + sm3_final(&sctx, dgst); + return 0; +} +EXPORT_SYMBOL(sm2_compute_z_digest); + +static int _sm2_verify(struct mpi_ec_ctx *ec, MPI hash, MPI sig_r, MPI sig_s) +{ + int rc = -EINVAL; + struct gcry_mpi_point sG, tP; + MPI t = NULL; + MPI x1 = NULL, y1 = NULL; + + mpi_point_init(&sG); + mpi_point_init(&tP); + x1 = mpi_new(0); + y1 = mpi_new(0); + t = mpi_new(0); + + /* r, s in [1, n-1] */ + if (mpi_cmp_ui(sig_r, 1) < 0 || mpi_cmp(sig_r, ec->n) > 0 || + mpi_cmp_ui(sig_s, 1) < 0 || mpi_cmp(sig_s, ec->n) > 0) { + goto leave; + } + + /* t = (r + s) % n, t == 0 */ + mpi_addm(t, sig_r, sig_s, ec->n); + if (mpi_cmp_ui(t, 0) == 0) + goto leave; + + /* sG + tP = (x1, y1) */ + rc = -EBADMSG; + mpi_ec_mul_point(&sG, sig_s, ec->G, ec); + mpi_ec_mul_point(&tP, t, ec->Q, ec); + mpi_ec_add_points(&sG, &sG, &tP, ec); + if (mpi_ec_get_affine(x1, y1, &sG, ec)) + goto leave; + + /* R = (e + x1) % n */ + mpi_addm(t, hash, x1, ec->n); + + /* check R == r */ + rc = -EKEYREJECTED; + if (mpi_cmp(t, sig_r)) + goto leave; + + rc = 0; + +leave: + mpi_point_free_parts(&sG); + mpi_point_free_parts(&tP); + mpi_free(x1); + mpi_free(y1); + mpi_free(t); + + return rc; +} + +static int sm2_verify(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm); + unsigned char *buffer; + struct sm2_signature_ctx sig; + MPI hash; + int ret; + + if (unlikely(!ec->Q)) + return -EINVAL; + + buffer = kmalloc(req->src_len + req->dst_len, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + sg_pcopy_to_buffer(req->src, + sg_nents_for_len(req->src, req->src_len + req->dst_len), + buffer, req->src_len + req->dst_len, 0); + + sig.sig_r = NULL; + sig.sig_s = NULL; + ret = asn1_ber_decoder(&sm2signature_decoder, &sig, + buffer, req->src_len); + if (ret) + goto error; + + ret = -ENOMEM; + hash = mpi_read_raw_data(buffer + req->src_len, req->dst_len); + if (!hash) + goto error; + + ret = _sm2_verify(ec, hash, sig.sig_r, sig.sig_s); + + mpi_free(hash); +error: + mpi_free(sig.sig_r); + mpi_free(sig.sig_s); + kfree(buffer); + return ret; +} + +static int sm2_set_pub_key(struct crypto_akcipher *tfm, + const void *key, unsigned int keylen) +{ + struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm); + MPI a; + int rc; + + /* include the uncompressed flag '0x04' */ + a = mpi_read_raw_data(key, keylen); + if (!a) + return -ENOMEM; + + mpi_normalize(a); + rc = sm2_ecc_os2ec(ec->Q, a); + mpi_free(a); + + return rc; +} + +static unsigned int sm2_max_size(struct crypto_akcipher *tfm) +{ + /* Unlimited max size */ + return PAGE_SIZE; +} + +static int sm2_init_tfm(struct crypto_akcipher *tfm) +{ + struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm); + + return sm2_ec_ctx_init(ec); +} + +static void sm2_exit_tfm(struct crypto_akcipher *tfm) +{ + struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm); + + sm2_ec_ctx_deinit(ec); +} + +static struct akcipher_alg sm2 = { + .verify = sm2_verify, + .set_pub_key = sm2_set_pub_key, + .max_size = sm2_max_size, + .init = sm2_init_tfm, + .exit = sm2_exit_tfm, + .base = { + .cra_name = "sm2", + .cra_driver_name = "sm2-generic", + .cra_priority = 100, + .cra_module = THIS_MODULE, + .cra_ctxsize = sizeof(struct mpi_ec_ctx), + }, +}; + +static int __init sm2_init(void) +{ + return crypto_register_akcipher(&sm2); +} + +static void __exit sm2_exit(void) +{ + crypto_unregister_akcipher(&sm2); +} + +subsys_initcall(sm2_init); +module_exit(sm2_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Tianjia Zhang "); +MODULE_DESCRIPTION("SM2 generic algorithm"); +MODULE_ALIAS_CRYPTO("sm2-generic"); -- cgit v1.2.3