Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 238 insertions, 0 deletions

diff --git a/crypto/ecdsa-x962.c b/crypto/ecdsa-x962.c
new file mode 100644
index 000000000..ee71594d1
--- /dev/null
+++ b/crypto/ecdsa-x962.c
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ECDSA X9.62 signature encoding
+ *
+ * Copyright (c) 2021 IBM Corporation
+ * Copyright (c) 2024 Intel Corporation
+ */
+
+#include <linux/asn1_decoder.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <crypto/algapi.h>
+#include <crypto/sig.h>
+#include <crypto/internal/ecc.h>
+#include <crypto/internal/sig.h>
+
+#include "ecdsasignature.asn1.h"
+
+struct ecdsa_x962_ctx {
+	struct crypto_sig *child;
+};
+
+struct ecdsa_x962_signature_ctx {
+	struct ecdsa_raw_sig sig;
+	unsigned int ndigits;
+};
+
+/* Get the r and s components of a signature from the X.509 certificate. */
+static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag,
+				  const void *value, size_t vlen,
+				  unsigned int ndigits)
+{
+	size_t bufsize = ndigits * sizeof(u64);
+	const char *d = value;
+
+	if (!value || !vlen || vlen > bufsize + 1)
+		return -EINVAL;
+
+	/*
+	 * vlen may be 1 byte larger than bufsize due to a leading zero byte
+	 * (necessary if the most significant bit of the integer is set).
+	 */
+	if (vlen > bufsize) {
+		/* skip over leading zeros that make 'value' a positive int */
+		if (*d == 0) {
+			vlen -= 1;
+			d++;
+		} else {
+			return -EINVAL;
+		}
+	}
+
+	ecc_digits_from_bytes(d, vlen, dest, ndigits);
+
+	return 0;
+}
+
+int ecdsa_get_signature_r(void *context, size_t hdrlen, unsigned char tag,
+			  const void *value, size_t vlen)
+{
+	struct ecdsa_x962_signature_ctx *sig_ctx = context;
+
+	return ecdsa_get_signature_rs(sig_ctx->sig.r, hdrlen, tag, value, vlen,
+				      sig_ctx->ndigits);
+}
+
+int ecdsa_get_signature_s(void *context, size_t hdrlen, unsigned char tag,
+			  const void *value, size_t vlen)
+{
+	struct ecdsa_x962_signature_ctx *sig_ctx = context;
+
+	return ecdsa_get_signature_rs(sig_ctx->sig.s, hdrlen, tag, value, vlen,
+				      sig_ctx->ndigits);
+}
+
+static int ecdsa_x962_verify(struct crypto_sig *tfm,
+			     const void *src, unsigned int slen,
+			     const void *digest, unsigned int dlen)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+	struct ecdsa_x962_signature_ctx sig_ctx;
+	int err;
+
+	sig_ctx.ndigits = DIV_ROUND_UP_POW2(crypto_sig_keysize(ctx->child),
+					    sizeof(u64) * BITS_PER_BYTE);
+
+	err = asn1_ber_decoder(&ecdsasignature_decoder, &sig_ctx, src, slen);
+	if (err < 0)
+		return err;
+
+	return crypto_sig_verify(ctx->child, &sig_ctx.sig, sizeof(sig_ctx.sig),
+				 digest, dlen);
+}
+
+static unsigned int ecdsa_x962_key_size(struct crypto_sig *tfm)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+
+	return crypto_sig_keysize(ctx->child);
+}
+
+static unsigned int ecdsa_x962_max_size(struct crypto_sig *tfm)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+	struct sig_alg *alg = crypto_sig_alg(ctx->child);
+	int slen = DIV_ROUND_UP_POW2(crypto_sig_keysize(ctx->child),
+				     BITS_PER_BYTE);
+
+	/*
+	 * Verify takes ECDSA-Sig-Value (described in RFC 5480) as input,
+	 * which is actually 2 'key_size'-bit integers encoded in ASN.1.
+	 * Account for the ASN.1 encoding overhead here.
+	 *
+	 * NIST P192/256/384 may prepend a '0' to a coordinate to indicate
+	 * a positive integer. NIST P521 never needs it.
+	 */
+	if (strcmp(alg->base.cra_name, "ecdsa-nist-p521") != 0)
+		slen += 1;
+
+	/* Length of encoding the x & y coordinates */
+	slen = 2 * (slen + 2);
+
+	/*
+	 * If coordinate encoding takes at least 128 bytes then an
+	 * additional byte for length encoding is needed.
+	 */
+	return 1 + (slen >= 128) + 1 + slen;
+}
+
+static unsigned int ecdsa_x962_digest_size(struct crypto_sig *tfm)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+
+	return crypto_sig_digestsize(ctx->child);
+}
+
+static int ecdsa_x962_set_pub_key(struct crypto_sig *tfm,
+				  const void *key, unsigned int keylen)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+
+	return crypto_sig_set_pubkey(ctx->child, key, keylen);
+}
+
+static int ecdsa_x962_init_tfm(struct crypto_sig *tfm)
+{
+	struct sig_instance *inst = sig_alg_instance(tfm);
+	struct crypto_sig_spawn *spawn = sig_instance_ctx(inst);
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+	struct crypto_sig *child_tfm;
+
+	child_tfm = crypto_spawn_sig(spawn);
+	if (IS_ERR(child_tfm))
+		return PTR_ERR(child_tfm);
+
+	ctx->child = child_tfm;
+
+	return 0;
+}
+
+static void ecdsa_x962_exit_tfm(struct crypto_sig *tfm)
+{
+	struct ecdsa_x962_ctx *ctx = crypto_sig_ctx(tfm);
+
+	crypto_free_sig(ctx->child);
+}
+
+static void ecdsa_x962_free(struct sig_instance *inst)
+{
+	struct crypto_sig_spawn *spawn = sig_instance_ctx(inst);
+
+	crypto_drop_sig(spawn);
+	kfree(inst);
+}
+
+static int ecdsa_x962_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+	struct crypto_sig_spawn *spawn;
+	struct sig_instance *inst;
+	struct sig_alg *ecdsa_alg;
+	u32 mask;
+	int err;
+
+	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SIG, &mask);
+	if (err)
+		return err;
+
+	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+	if (!inst)
+		return -ENOMEM;
+
+	spawn = sig_instance_ctx(inst);
+
+	err = crypto_grab_sig(spawn, sig_crypto_instance(inst),
+			      crypto_attr_alg_name(tb[1]), 0, mask);
+	if (err)
+		goto err_free_inst;
+
+	ecdsa_alg = crypto_spawn_sig_alg(spawn);
+
+	err = -EINVAL;
+	if (strncmp(ecdsa_alg->base.cra_name, "ecdsa", 5) != 0)
+		goto err_free_inst;
+
+	err = crypto_inst_setname(sig_crypto_instance(inst), tmpl->name,
+				  &ecdsa_alg->base);
+	if (err)
+		goto err_free_inst;
+
+	inst->alg.base.cra_priority = ecdsa_alg->base.cra_priority;
+	inst->alg.base.cra_ctxsize = sizeof(struct ecdsa_x962_ctx);
+
+	inst->alg.init = ecdsa_x962_init_tfm;
+	inst->alg.exit = ecdsa_x962_exit_tfm;
+
+	inst->alg.verify = ecdsa_x962_verify;
+	inst->alg.key_size = ecdsa_x962_key_size;
+	inst->alg.max_size = ecdsa_x962_max_size;
+	inst->alg.digest_size = ecdsa_x962_digest_size;
+	inst->alg.set_pub_key = ecdsa_x962_set_pub_key;
+
+	inst->free = ecdsa_x962_free;
+
+	err = sig_register_instance(tmpl, inst);
+	if (err) {
+err_free_inst:
+		ecdsa_x962_free(inst);
+	}
+	return err;
+}
+
+struct crypto_template ecdsa_x962_tmpl = {
+	.name = "x962",
+	.create = ecdsa_x962_create,
+	.module = THIS_MODULE,
+};
+
+MODULE_ALIAS_CRYPTO("x962");