From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- crypto/seqiv.c | 178 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) create mode 100644 crypto/seqiv.c (limited to 'crypto/seqiv.c') diff --git a/crypto/seqiv.c b/crypto/seqiv.c new file mode 100644 index 000000000..678bb4145 --- /dev/null +++ b/crypto/seqiv.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * seqiv: Sequence Number IV Generator + * + * This generator generates an IV based on a sequence number by xoring it + * with a salt. This algorithm is mainly useful for CTR and similar modes. + * + * Copyright (c) 2007 Herbert Xu + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void seqiv_aead_encrypt_complete2(struct aead_request *req, int err) +{ + struct aead_request *subreq = aead_request_ctx(req); + struct crypto_aead *geniv; + + if (err == -EINPROGRESS || err == -EBUSY) + return; + + if (err) + goto out; + + geniv = crypto_aead_reqtfm(req); + memcpy(req->iv, subreq->iv, crypto_aead_ivsize(geniv)); + +out: + kfree_sensitive(subreq->iv); +} + +static void seqiv_aead_encrypt_complete(void *data, int err) +{ + struct aead_request *req = data; + + seqiv_aead_encrypt_complete2(req, err); + aead_request_complete(req, err); +} + +static int seqiv_aead_encrypt(struct aead_request *req) +{ + struct crypto_aead *geniv = crypto_aead_reqtfm(req); + struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv); + struct aead_request *subreq = aead_request_ctx(req); + crypto_completion_t compl; + bool unaligned_info; + void *data; + u8 *info; + unsigned int ivsize = 8; + int err; + + if (req->cryptlen < ivsize) + return -EINVAL; + + aead_request_set_tfm(subreq, ctx->child); + + compl = req->base.complete; + data = req->base.data; + info = req->iv; + + if (req->src != req->dst) + memcpy_sglist(req->dst, req->src, + req->assoclen + req->cryptlen); + + unaligned_info = !IS_ALIGNED((unsigned long)info, + crypto_aead_alignmask(geniv) + 1); + if (unlikely(unaligned_info)) { + info = kmemdup(req->iv, ivsize, req->base.flags & + CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : + GFP_ATOMIC); + if (!info) + return -ENOMEM; + + compl = seqiv_aead_encrypt_complete; + data = req; + } + + aead_request_set_callback(subreq, req->base.flags, compl, data); + aead_request_set_crypt(subreq, req->dst, req->dst, + req->cryptlen - ivsize, info); + aead_request_set_ad(subreq, req->assoclen + ivsize); + + crypto_xor(info, ctx->salt, ivsize); + scatterwalk_map_and_copy(info, req->dst, req->assoclen, ivsize, 1); + + err = crypto_aead_encrypt(subreq); + if (unlikely(unaligned_info)) + seqiv_aead_encrypt_complete2(req, err); + return err; +} + +static int seqiv_aead_decrypt(struct aead_request *req) +{ + struct crypto_aead *geniv = crypto_aead_reqtfm(req); + struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv); + struct aead_request *subreq = aead_request_ctx(req); + crypto_completion_t compl; + void *data; + unsigned int ivsize = 8; + + if (req->cryptlen < ivsize + crypto_aead_authsize(geniv)) + return -EINVAL; + + aead_request_set_tfm(subreq, ctx->child); + + compl = req->base.complete; + data = req->base.data; + + aead_request_set_callback(subreq, req->base.flags, compl, data); + aead_request_set_crypt(subreq, req->src, req->dst, + req->cryptlen - ivsize, req->iv); + aead_request_set_ad(subreq, req->assoclen + ivsize); + + scatterwalk_map_and_copy(req->iv, req->src, req->assoclen, ivsize, 0); + + return crypto_aead_decrypt(subreq); +} + +static int seqiv_aead_create(struct crypto_template *tmpl, struct rtattr **tb) +{ + struct aead_instance *inst; + int err; + + inst = aead_geniv_alloc(tmpl, tb); + + if (IS_ERR(inst)) + return PTR_ERR(inst); + + err = -EINVAL; + if (inst->alg.ivsize != sizeof(u64)) + goto free_inst; + + inst->alg.encrypt = seqiv_aead_encrypt; + inst->alg.decrypt = seqiv_aead_decrypt; + + inst->alg.init = aead_init_geniv; + inst->alg.exit = aead_exit_geniv; + + inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx); + inst->alg.base.cra_ctxsize += inst->alg.ivsize; + + err = aead_register_instance(tmpl, inst); + if (err) { +free_inst: + inst->free(inst); + } + return err; +} + +static struct crypto_template seqiv_tmpl = { + .name = "seqiv", + .create = seqiv_aead_create, + .module = THIS_MODULE, +}; + +static int __init seqiv_module_init(void) +{ + return crypto_register_template(&seqiv_tmpl); +} + +static void __exit seqiv_module_exit(void) +{ + crypto_unregister_template(&seqiv_tmpl); +} + +module_init(seqiv_module_init); +module_exit(seqiv_module_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Sequence Number IV Generator"); +MODULE_ALIAS_CRYPTO("seqiv"); -- cgit v1.3.1