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/shash.c | 626 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 626 insertions(+) create mode 100644 crypto/shash.c (limited to 'crypto/shash.c') diff --git a/crypto/shash.c b/crypto/shash.c new file mode 100644 index 000000000..58b46f198 --- /dev/null +++ b/crypto/shash.c @@ -0,0 +1,626 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Synchronous Cryptographic Hash operations. + * + * Copyright (c) 2008 Herbert Xu + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "internal.h" + +#define MAX_SHASH_ALIGNMASK 63 + +static const struct crypto_type crypto_shash_type; + +int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, + unsigned int keylen) +{ + return -ENOSYS; +} +EXPORT_SYMBOL_GPL(shash_no_setkey); + +static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, + unsigned int keylen) +{ + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + unsigned long absize; + u8 *buffer, *alignbuffer; + int err; + + absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); + buffer = kmalloc(absize, GFP_ATOMIC); + if (!buffer) + return -ENOMEM; + + alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); + memcpy(alignbuffer, key, keylen); + err = shash->setkey(tfm, alignbuffer, keylen); + kfree_sensitive(buffer); + return err; +} + +static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg) +{ + if (crypto_shash_alg_needs_key(alg)) + crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY); +} + +int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, + unsigned int keylen) +{ + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + int err; + + if ((unsigned long)key & alignmask) + err = shash_setkey_unaligned(tfm, key, keylen); + else + err = shash->setkey(tfm, key, keylen); + + if (unlikely(err)) { + shash_set_needkey(tfm, shash); + return err; + } + + crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); + return 0; +} +EXPORT_SYMBOL_GPL(crypto_shash_setkey); + +static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct crypto_shash *tfm = desc->tfm; + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + unsigned int unaligned_len = alignmask + 1 - + ((unsigned long)data & alignmask); + /* + * We cannot count on __aligned() working for large values: + * https://patchwork.kernel.org/patch/9507697/ + */ + u8 ubuf[MAX_SHASH_ALIGNMASK * 2]; + u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); + int err; + + if (WARN_ON(buf + unaligned_len > ubuf + sizeof(ubuf))) + return -EINVAL; + + if (unaligned_len > len) + unaligned_len = len; + + memcpy(buf, data, unaligned_len); + err = shash->update(desc, buf, unaligned_len); + memset(buf, 0, unaligned_len); + + return err ?: + shash->update(desc, data + unaligned_len, len - unaligned_len); +} + +int crypto_shash_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct crypto_shash *tfm = desc->tfm; + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + + if ((unsigned long)data & alignmask) + return shash_update_unaligned(desc, data, len); + + return shash->update(desc, data, len); +} +EXPORT_SYMBOL_GPL(crypto_shash_update); + +static int shash_final_unaligned(struct shash_desc *desc, u8 *out) +{ + struct crypto_shash *tfm = desc->tfm; + unsigned long alignmask = crypto_shash_alignmask(tfm); + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned int ds = crypto_shash_digestsize(tfm); + /* + * We cannot count on __aligned() working for large values: + * https://patchwork.kernel.org/patch/9507697/ + */ + u8 ubuf[MAX_SHASH_ALIGNMASK + HASH_MAX_DIGESTSIZE]; + u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); + int err; + + if (WARN_ON(buf + ds > ubuf + sizeof(ubuf))) + return -EINVAL; + + err = shash->final(desc, buf); + if (err) + goto out; + + memcpy(out, buf, ds); + +out: + memset(buf, 0, ds); + return err; +} + +int crypto_shash_final(struct shash_desc *desc, u8 *out) +{ + struct crypto_shash *tfm = desc->tfm; + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + + if ((unsigned long)out & alignmask) + return shash_final_unaligned(desc, out); + + return shash->final(desc, out); +} +EXPORT_SYMBOL_GPL(crypto_shash_final); + +static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + return crypto_shash_update(desc, data, len) ?: + crypto_shash_final(desc, out); +} + +int crypto_shash_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + struct crypto_shash *tfm = desc->tfm; + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + + if (((unsigned long)data | (unsigned long)out) & alignmask) + return shash_finup_unaligned(desc, data, len, out); + + return shash->finup(desc, data, len, out); +} +EXPORT_SYMBOL_GPL(crypto_shash_finup); + +static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + return crypto_shash_init(desc) ?: + crypto_shash_finup(desc, data, len, out); +} + +int crypto_shash_digest(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + struct crypto_shash *tfm = desc->tfm; + struct shash_alg *shash = crypto_shash_alg(tfm); + unsigned long alignmask = crypto_shash_alignmask(tfm); + + if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) + return -ENOKEY; + + if (((unsigned long)data | (unsigned long)out) & alignmask) + return shash_digest_unaligned(desc, data, len, out); + + return shash->digest(desc, data, len, out); +} +EXPORT_SYMBOL_GPL(crypto_shash_digest); + +int crypto_shash_tfm_digest(struct crypto_shash *tfm, const u8 *data, + unsigned int len, u8 *out) +{ + SHASH_DESC_ON_STACK(desc, tfm); + int err; + + desc->tfm = tfm; + + err = crypto_shash_digest(desc, data, len, out); + + shash_desc_zero(desc); + + return err; +} +EXPORT_SYMBOL_GPL(crypto_shash_tfm_digest); + +static int shash_default_export(struct shash_desc *desc, void *out) +{ + memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); + return 0; +} + +static int shash_default_import(struct shash_desc *desc, const void *in) +{ + memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); + return 0; +} + +static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, + unsigned int keylen) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(tfm); + + return crypto_shash_setkey(*ctx, key, keylen); +} + +static int shash_async_init(struct ahash_request *req) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); + struct shash_desc *desc = ahash_request_ctx(req); + + desc->tfm = *ctx; + + return crypto_shash_init(desc); +} + +int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) +{ + struct crypto_hash_walk walk; + int nbytes; + + for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; + nbytes = crypto_hash_walk_done(&walk, nbytes)) + nbytes = crypto_shash_update(desc, walk.data, nbytes); + + return nbytes; +} +EXPORT_SYMBOL_GPL(shash_ahash_update); + +static int shash_async_update(struct ahash_request *req) +{ + return shash_ahash_update(req, ahash_request_ctx(req)); +} + +static int shash_async_final(struct ahash_request *req) +{ + return crypto_shash_final(ahash_request_ctx(req), req->result); +} + +int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) +{ + struct crypto_hash_walk walk; + int nbytes; + + nbytes = crypto_hash_walk_first(req, &walk); + if (!nbytes) + return crypto_shash_final(desc, req->result); + + do { + nbytes = crypto_hash_walk_last(&walk) ? + crypto_shash_finup(desc, walk.data, nbytes, + req->result) : + crypto_shash_update(desc, walk.data, nbytes); + nbytes = crypto_hash_walk_done(&walk, nbytes); + } while (nbytes > 0); + + return nbytes; +} +EXPORT_SYMBOL_GPL(shash_ahash_finup); + +static int shash_async_finup(struct ahash_request *req) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); + struct shash_desc *desc = ahash_request_ctx(req); + + desc->tfm = *ctx; + + return shash_ahash_finup(req, desc); +} + +int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) +{ + unsigned int nbytes = req->nbytes; + struct scatterlist *sg; + unsigned int offset; + int err; + + if (nbytes && + (sg = req->src, offset = sg->offset, + nbytes <= min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { + void *data; + + data = kmap_local_page(sg_page(sg)); + err = crypto_shash_digest(desc, data + offset, nbytes, + req->result); + kunmap_local(data); + } else + err = crypto_shash_init(desc) ?: + shash_ahash_finup(req, desc); + + return err; +} +EXPORT_SYMBOL_GPL(shash_ahash_digest); + +static int shash_async_digest(struct ahash_request *req) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); + struct shash_desc *desc = ahash_request_ctx(req); + + desc->tfm = *ctx; + + return shash_ahash_digest(req, desc); +} + +static int shash_async_export(struct ahash_request *req, void *out) +{ + return crypto_shash_export(ahash_request_ctx(req), out); +} + +static int shash_async_import(struct ahash_request *req, const void *in) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); + struct shash_desc *desc = ahash_request_ctx(req); + + desc->tfm = *ctx; + + return crypto_shash_import(desc, in); +} + +static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) +{ + struct crypto_shash **ctx = crypto_tfm_ctx(tfm); + + crypto_free_shash(*ctx); +} + +int crypto_init_shash_ops_async(struct crypto_tfm *tfm) +{ + struct crypto_alg *calg = tfm->__crt_alg; + struct shash_alg *alg = __crypto_shash_alg(calg); + struct crypto_ahash *crt = __crypto_ahash_cast(tfm); + struct crypto_shash **ctx = crypto_tfm_ctx(tfm); + struct crypto_shash *shash; + + if (!crypto_mod_get(calg)) + return -EAGAIN; + + shash = crypto_create_tfm(calg, &crypto_shash_type); + if (IS_ERR(shash)) { + crypto_mod_put(calg); + return PTR_ERR(shash); + } + + *ctx = shash; + tfm->exit = crypto_exit_shash_ops_async; + + crt->init = shash_async_init; + crt->update = shash_async_update; + crt->final = shash_async_final; + crt->finup = shash_async_finup; + crt->digest = shash_async_digest; + if (crypto_shash_alg_has_setkey(alg)) + crt->setkey = shash_async_setkey; + + crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) & + CRYPTO_TFM_NEED_KEY); + + crt->export = shash_async_export; + crt->import = shash_async_import; + + crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); + + return 0; +} + +static void crypto_shash_exit_tfm(struct crypto_tfm *tfm) +{ + struct crypto_shash *hash = __crypto_shash_cast(tfm); + struct shash_alg *alg = crypto_shash_alg(hash); + + alg->exit_tfm(hash); +} + +static int crypto_shash_init_tfm(struct crypto_tfm *tfm) +{ + struct crypto_shash *hash = __crypto_shash_cast(tfm); + struct shash_alg *alg = crypto_shash_alg(hash); + int err; + + hash->descsize = alg->descsize; + + shash_set_needkey(hash, alg); + + if (alg->exit_tfm) + tfm->exit = crypto_shash_exit_tfm; + + if (!alg->init_tfm) + return 0; + + err = alg->init_tfm(hash); + if (err) + return err; + + /* ->init_tfm() may have increased the descsize. */ + if (WARN_ON_ONCE(hash->descsize > HASH_MAX_DESCSIZE)) { + if (alg->exit_tfm) + alg->exit_tfm(hash); + return -EINVAL; + } + + return 0; +} + +static void crypto_shash_free_instance(struct crypto_instance *inst) +{ + struct shash_instance *shash = shash_instance(inst); + + shash->free(shash); +} + +#ifdef CONFIG_NET +static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + struct crypto_report_hash rhash; + struct shash_alg *salg = __crypto_shash_alg(alg); + + memset(&rhash, 0, sizeof(rhash)); + + strscpy(rhash.type, "shash", sizeof(rhash.type)); + + rhash.blocksize = alg->cra_blocksize; + rhash.digestsize = salg->digestsize; + + return nla_put(skb, CRYPTOCFGA_REPORT_HASH, sizeof(rhash), &rhash); +} +#else +static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + return -ENOSYS; +} +#endif + +static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) + __maybe_unused; +static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) +{ + struct shash_alg *salg = __crypto_shash_alg(alg); + + seq_printf(m, "type : shash\n"); + seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); + seq_printf(m, "digestsize : %u\n", salg->digestsize); +} + +static const struct crypto_type crypto_shash_type = { + .extsize = crypto_alg_extsize, + .init_tfm = crypto_shash_init_tfm, + .free = crypto_shash_free_instance, +#ifdef CONFIG_PROC_FS + .show = crypto_shash_show, +#endif + .report = crypto_shash_report, + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_SHASH, + .tfmsize = offsetof(struct crypto_shash, base), +}; + +int crypto_grab_shash(struct crypto_shash_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask) +{ + spawn->base.frontend = &crypto_shash_type; + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_grab_shash); + +struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, + u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_shash); + +int crypto_has_shash(const char *alg_name, u32 type, u32 mask) +{ + return crypto_type_has_alg(alg_name, &crypto_shash_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_has_shash); + +static int shash_prepare_alg(struct shash_alg *alg) +{ + struct crypto_alg *base = &alg->base; + + if (alg->digestsize > HASH_MAX_DIGESTSIZE || + alg->descsize > HASH_MAX_DESCSIZE || + alg->statesize > HASH_MAX_STATESIZE) + return -EINVAL; + + if (base->cra_alignmask > MAX_SHASH_ALIGNMASK) + return -EINVAL; + + if ((alg->export && !alg->import) || (alg->import && !alg->export)) + return -EINVAL; + + base->cra_type = &crypto_shash_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; + + if (!alg->finup) + alg->finup = shash_finup_unaligned; + if (!alg->digest) + alg->digest = shash_digest_unaligned; + if (!alg->export) { + alg->export = shash_default_export; + alg->import = shash_default_import; + alg->statesize = alg->descsize; + } + if (!alg->setkey) + alg->setkey = shash_no_setkey; + + return 0; +} + +int crypto_register_shash(struct shash_alg *alg) +{ + struct crypto_alg *base = &alg->base; + int err; + + err = shash_prepare_alg(alg); + if (err) + return err; + + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_shash); + +void crypto_unregister_shash(struct shash_alg *alg) +{ + crypto_unregister_alg(&alg->base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_shash); + +int crypto_register_shashes(struct shash_alg *algs, int count) +{ + int i, ret; + + for (i = 0; i < count; i++) { + ret = crypto_register_shash(&algs[i]); + if (ret) + goto err; + } + + return 0; + +err: + for (--i; i >= 0; --i) + crypto_unregister_shash(&algs[i]); + + return ret; +} +EXPORT_SYMBOL_GPL(crypto_register_shashes); + +void crypto_unregister_shashes(struct shash_alg *algs, int count) +{ + int i; + + for (i = count - 1; i >= 0; --i) + crypto_unregister_shash(&algs[i]); +} +EXPORT_SYMBOL_GPL(crypto_unregister_shashes); + +int shash_register_instance(struct crypto_template *tmpl, + struct shash_instance *inst) +{ + int err; + + if (WARN_ON(!inst->free)) + return -EINVAL; + + err = shash_prepare_alg(&inst->alg); + if (err) + return err; + + return crypto_register_instance(tmpl, shash_crypto_instance(inst)); +} +EXPORT_SYMBOL_GPL(shash_register_instance); + +void shash_free_singlespawn_instance(struct shash_instance *inst) +{ + crypto_drop_spawn(shash_instance_ctx(inst)); + kfree(inst); +} +EXPORT_SYMBOL_GPL(shash_free_singlespawn_instance); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Synchronous cryptographic hash type"); -- cgit v1.2.3