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authorLinus Torvalds <torvalds@linux-foundation.org>2023-08-29 18:05:18 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-08-29 18:05:18 +0300
commitf2586d921cea4feeddd1cc5ee3495700540dba8f (patch)
tree7207a1e8c8eb1f4f67f1e2987df12c6a81485184
parent1c59d383390f970b891b503b7f79b63a02db2ec5 (diff)
parent218a2680624cba1611e3dfc7d9b646d240e5f855 (diff)
downloadlinux-f2586d921cea4feeddd1cc5ee3495700540dba8f.tar.xz
Merge tag 'tpmdd-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen: - Restrict linking of keys to .ima and .evm keyrings based on digitalSignature attribute in the certificate - PowerVM: load machine owner keys into the .machine [1] keyring - PowerVM: load module signing keys into the secondary trusted keyring (keys blessed by the vendor) - tpm_tis_spi: half-duplex transfer mode - tpm_tis: retry corrupted transfers - Apply revocation list (.mokx) to an all system keyrings (e.g. .machine keyring) Link: https://blogs.oracle.com/linux/post/the-machine-keyring [1] * tag 'tpmdd-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: certs: Reference revocation list for all keyrings tpm/tpm_tis_synquacer: Use module_platform_driver macro to simplify the code tpm: remove redundant variable len tpm_tis: Resend command to recover from data transfer errors tpm_tis: Use responseRetry to recover from data transfer errors tpm_tis: Move CRC check to generic send routine tpm_tis_spi: Add hardware wait polling KEYS: Replace all non-returning strlcpy with strscpy integrity: PowerVM support for loading third party code signing keys integrity: PowerVM machine keyring enablement integrity: check whether imputed trust is enabled integrity: remove global variable from machine_keyring.c integrity: ignore keys failing CA restrictions on non-UEFI platform integrity: PowerVM support for loading CA keys on machine keyring integrity: Enforce digitalSignature usage in the ima and evm keyrings KEYS: DigitalSignature link restriction tpm_tis: Revert "tpm_tis: Disable interrupts on ThinkPad T490s"
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt7
-rw-r--r--certs/system_keyring.c91
-rw-r--r--crypto/asymmetric_keys/restrict.c44
-rw-r--r--drivers/char/tpm/eventlog/tpm1.c3
-rw-r--r--drivers/char/tpm/tpm_tis.c93
-rw-r--r--drivers/char/tpm/tpm_tis_core.c60
-rw-r--r--drivers/char/tpm/tpm_tis_core.h1
-rw-r--r--drivers/char/tpm/tpm_tis_spi_main.c91
-rw-r--r--drivers/char/tpm/tpm_tis_synquacer.c18
-rw-r--r--include/crypto/public_key.h12
-rw-r--r--include/keys/system_keyring.h14
-rw-r--r--security/integrity/Kconfig4
-rw-r--r--security/integrity/digsig.c6
-rw-r--r--security/integrity/evm/Kconfig3
-rw-r--r--security/integrity/ima/Kconfig3
-rw-r--r--security/integrity/integrity.h5
-rw-r--r--security/integrity/platform_certs/keyring_handler.c19
-rw-r--r--security/integrity/platform_certs/keyring_handler.h10
-rw-r--r--security/integrity/platform_certs/load_powerpc.c34
-rw-r--r--security/integrity/platform_certs/machine_keyring.c22
-rw-r--r--security/keys/request_key_auth.c2
21 files changed, 394 insertions, 148 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0c38a8af95ce..e5d71ba4e6ae 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6394,6 +6394,13 @@
This will guarantee that all the other pcrs
are saved.
+ tpm_tis.interrupts= [HW,TPM]
+ Enable interrupts for the MMIO based physical layer
+ for the FIFO interface. By default it is set to false
+ (0). For more information about TPM hardware interfaces
+ defined by Trusted Computing Group (TCG) see
+ https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
+
tp_printk [FTRACE]
Have the tracepoints sent to printk as well as the
tracing ring buffer. This is useful for early boot up
diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index a7a49b17ceb1..9de610bf1f4b 100644
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -51,6 +51,26 @@ int restrict_link_by_builtin_trusted(struct key *dest_keyring,
builtin_trusted_keys);
}
+/**
+ * restrict_link_by_digsig_builtin - Restrict digitalSignature key additions by the built-in keyring
+ * @dest_keyring: Keyring being linked to.
+ * @type: The type of key being added.
+ * @payload: The payload of the new key.
+ * @restriction_key: A ring of keys that can be used to vouch for the new cert.
+ *
+ * Restrict the addition of keys into a keyring based on the key-to-be-added
+ * being vouched for by a key in the built in system keyring. The new key
+ * must have the digitalSignature usage field set.
+ */
+int restrict_link_by_digsig_builtin(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *restriction_key)
+{
+ return restrict_link_by_digsig(dest_keyring, type, payload,
+ builtin_trusted_keys);
+}
+
#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
/**
* restrict_link_by_builtin_and_secondary_trusted - Restrict keyring
@@ -83,6 +103,35 @@ int restrict_link_by_builtin_and_secondary_trusted(
secondary_trusted_keys);
}
+/**
+ * restrict_link_by_digsig_builtin_and_secondary - Restrict by digitalSignature.
+ * @dest_keyring: Keyring being linked to.
+ * @type: The type of key being added.
+ * @payload: The payload of the new key.
+ * @restrict_key: A ring of keys that can be used to vouch for the new cert.
+ *
+ * Restrict the addition of keys into a keyring based on the key-to-be-added
+ * being vouched for by a key in either the built-in or the secondary system
+ * keyrings. The new key must have the digitalSignature usage field set.
+ */
+int restrict_link_by_digsig_builtin_and_secondary(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *restrict_key)
+{
+ /* If we have a secondary trusted keyring, then that contains a link
+ * through to the builtin keyring and the search will follow that link.
+ */
+ if (type == &key_type_keyring &&
+ dest_keyring == secondary_trusted_keys &&
+ payload == &builtin_trusted_keys->payload)
+ /* Allow the builtin keyring to be added to the secondary */
+ return 0;
+
+ return restrict_link_by_digsig(dest_keyring, type, payload,
+ secondary_trusted_keys);
+}
+
/*
* Allocate a struct key_restriction for the "builtin and secondary trust"
* keyring. Only for use in system_trusted_keyring_init().
@@ -103,6 +152,36 @@ static __init struct key_restriction *get_builtin_and_secondary_restriction(void
return restriction;
}
+
+/**
+ * add_to_secondary_keyring - Add to secondary keyring.
+ * @source: Source of key
+ * @data: The blob holding the key
+ * @len: The length of the data blob
+ *
+ * Add a key to the secondary keyring. The key must be vouched for by a key in the builtin,
+ * machine or secondary keyring itself.
+ */
+void __init add_to_secondary_keyring(const char *source, const void *data, size_t len)
+{
+ key_ref_t key;
+ key_perm_t perm;
+
+ perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW;
+
+ key = key_create_or_update(make_key_ref(secondary_trusted_keys, 1),
+ "asymmetric",
+ NULL, data, len, perm,
+ KEY_ALLOC_NOT_IN_QUOTA);
+ if (IS_ERR(key)) {
+ pr_err("Problem loading X.509 certificate from %s to secondary keyring %ld\n",
+ source, PTR_ERR(key));
+ return;
+ }
+
+ pr_notice("Loaded X.509 cert '%s'\n", key_ref_to_ptr(key)->description);
+ key_ref_put(key);
+}
#endif
#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
void __init set_machine_trusted_keys(struct key *keyring)
@@ -251,6 +330,12 @@ int verify_pkcs7_message_sig(const void *data, size_t len,
if (ret < 0)
goto error;
+ ret = is_key_on_revocation_list(pkcs7);
+ if (ret != -ENOKEY) {
+ pr_devel("PKCS#7 key is on revocation list\n");
+ goto error;
+ }
+
if (!trusted_keys) {
trusted_keys = builtin_trusted_keys;
} else if (trusted_keys == VERIFY_USE_SECONDARY_KEYRING) {
@@ -270,12 +355,6 @@ int verify_pkcs7_message_sig(const void *data, size_t len,
pr_devel("PKCS#7 platform keyring is not available\n");
goto error;
}
-
- ret = is_key_on_revocation_list(pkcs7);
- if (ret != -ENOKEY) {
- pr_devel("PKCS#7 platform key is on revocation list\n");
- goto error;
- }
}
ret = pkcs7_validate_trust(pkcs7, trusted_keys);
if (ret < 0) {
diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c
index 276bdb627498..6b69ea40da23 100644
--- a/crypto/asymmetric_keys/restrict.c
+++ b/crypto/asymmetric_keys/restrict.c
@@ -148,6 +148,50 @@ int restrict_link_by_ca(struct key *dest_keyring,
return 0;
}
+/**
+ * restrict_link_by_digsig - Restrict additions to a ring of digsig keys
+ * @dest_keyring: Keyring being linked to.
+ * @type: The type of key being added.
+ * @payload: The payload of the new key.
+ * @trust_keyring: A ring of keys that can be used to vouch for the new cert.
+ *
+ * Check if the new certificate has digitalSignature usage set. If it is,
+ * then mark the new certificate as being ok to link. Afterwards verify
+ * the new certificate against the ones in the trust_keyring.
+ *
+ * Returns 0 if the new certificate was accepted, -ENOKEY if the
+ * certificate is not a digsig. -ENOPKG if the signature uses unsupported
+ * crypto, or some other error if there is a matching certificate but
+ * the signature check cannot be performed.
+ */
+int restrict_link_by_digsig(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *trust_keyring)
+{
+ const struct public_key *pkey;
+
+ if (type != &key_type_asymmetric)
+ return -EOPNOTSUPP;
+
+ pkey = payload->data[asym_crypto];
+
+ if (!pkey)
+ return -ENOPKG;
+
+ if (!test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags))
+ return -ENOKEY;
+
+ if (test_bit(KEY_EFLAG_CA, &pkey->key_eflags))
+ return -ENOKEY;
+
+ if (test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags))
+ return -ENOKEY;
+
+ return restrict_link_by_signature(dest_keyring, type, payload,
+ trust_keyring);
+}
+
static bool match_either_id(const struct asymmetric_key_id **pair,
const struct asymmetric_key_id *single)
{
diff --git a/drivers/char/tpm/eventlog/tpm1.c b/drivers/char/tpm/eventlog/tpm1.c
index 8aa9057601d6..12ee42a31c71 100644
--- a/drivers/char/tpm/eventlog/tpm1.c
+++ b/drivers/char/tpm/eventlog/tpm1.c
@@ -251,7 +251,6 @@ static int tpm1_binary_bios_measurements_show(struct seq_file *m, void *v)
static int tpm1_ascii_bios_measurements_show(struct seq_file *m, void *v)
{
- int len = 0;
char *eventname;
struct tcpa_event *event = v;
unsigned char *event_entry =
@@ -273,7 +272,7 @@ static int tpm1_ascii_bios_measurements_show(struct seq_file *m, void *v)
/* 3rd: event type identifier */
seq_printf(m, " %02x", do_endian_conversion(event->event_type));
- len += get_event_name(eventname, event, event_entry);
+ get_event_name(eventname, event, event_entry);
/* 4th: eventname <= max + \'0' delimiter */
seq_printf(m, " %s\n", eventname);
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 7fa3d91042b2..077fdb73740c 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -27,7 +27,6 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/kernel.h>
-#include <linux/dmi.h>
#include "tpm.h"
#include "tpm_tis_core.h"
@@ -89,8 +88,8 @@ static inline void tpm_tis_iowrite32(u32 b, void __iomem *iobase, u32 addr)
tpm_tis_flush(iobase);
}
-static int interrupts;
-module_param(interrupts, int, 0444);
+static bool interrupts;
+module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
static bool itpm;
@@ -103,92 +102,6 @@ module_param(force, bool, 0444);
MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
#endif
-static int tpm_tis_disable_irq(const struct dmi_system_id *d)
-{
- if (interrupts == -1) {
- pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);
- interrupts = 0;
- }
-
- return 0;
-}
-
-static const struct dmi_system_id tpm_tis_dmi_table[] = {
- {
- .callback = tpm_tis_disable_irq,
- .ident = "Framework Laptop (12th Gen Intel Core)",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Framework"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Laptop (12th Gen Intel Core)"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "Framework Laptop (13th Gen Intel Core)",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Framework"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Laptop (13th Gen Intel Core)"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "ThinkPad T490s",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "ThinkStation P360 Tiny",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkStation P360 Tiny"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "ThinkPad L490",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L490"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "ThinkPad L590",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L590"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "ThinkStation P620",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkStation P620"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "TUXEDO InfinityBook S 15/17 Gen7",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "TUXEDO InfinityBook S 15/17 Gen7"),
- },
- },
- {
- .callback = tpm_tis_disable_irq,
- .ident = "UPX-TGL",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
- DMI_MATCH(DMI_PRODUCT_NAME, "UPX-TGL01"),
- },
- },
- {}
-};
-
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int has_hid(struct acpi_device *dev, const char *hid)
{
@@ -312,8 +225,6 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info)
int irq = -1;
int rc;
- dmi_check_system(tpm_tis_dmi_table);
-
rc = check_acpi_tpm2(dev);
if (rc)
return rc;
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index b95963095729..1b350412d8a6 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -340,7 +340,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
return size;
}
-static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
+static int tpm_tis_try_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
int size = 0;
@@ -348,11 +348,6 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
u32 expected;
int rc;
- if (count < TPM_HEADER_SIZE) {
- size = -EIO;
- goto out;
- }
-
size = recv_data(chip, buf, TPM_HEADER_SIZE);
/* read first 10 bytes, including tag, paramsize, and result */
if (size < TPM_HEADER_SIZE) {
@@ -385,7 +380,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
goto out;
}
status = tpm_tis_status(chip);
- if (status & TPM_STS_DATA_AVAIL) { /* retry? */
+ if (status & TPM_STS_DATA_AVAIL) {
dev_err(&chip->dev, "Error left over data\n");
size = -EIO;
goto out;
@@ -399,10 +394,36 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
}
out:
- tpm_tis_ready(chip);
return size;
}
+static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
+ unsigned int try;
+ int rc = 0;
+
+ if (count < TPM_HEADER_SIZE)
+ return -EIO;
+
+ for (try = 0; try < TPM_RETRY; try++) {
+ rc = tpm_tis_try_recv(chip, buf, count);
+
+ if (rc == -EIO)
+ /* Data transfer errors, indicated by EIO, can be
+ * recovered by rereading the response.
+ */
+ tpm_tis_write8(priv, TPM_STS(priv->locality),
+ TPM_STS_RESPONSE_RETRY);
+ else
+ break;
+ }
+
+ tpm_tis_ready(chip);
+
+ return rc;
+}
+
/*
* If interrupts are used (signaled by an irq set in the vendor structure)
* tpm.c can skip polling for the data to be available as the interrupt is
@@ -469,6 +490,12 @@ static int tpm_tis_send_data(struct tpm_chip *chip, const u8 *buf, size_t len)
goto out_err;
}
+ rc = tpm_tis_verify_crc(priv, len, buf);
+ if (rc < 0) {
+ dev_err(&chip->dev, "CRC mismatch for command.\n");
+ goto out_err;
+ }
+
return 0;
out_err:
@@ -512,15 +539,16 @@ static int tpm_tis_send_main(struct tpm_chip *chip, const u8 *buf, size_t len)
int rc;
u32 ordinal;
unsigned long dur;
+ unsigned int try;
- rc = tpm_tis_send_data(chip, buf, len);
- if (rc < 0)
- return rc;
-
- rc = tpm_tis_verify_crc(priv, len, buf);
- if (rc < 0) {
- dev_err(&chip->dev, "CRC mismatch for command.\n");
- return rc;
+ for (try = 0; try < TPM_RETRY; try++) {
+ rc = tpm_tis_send_data(chip, buf, len);
+ if (rc >= 0)
+ /* Data transfer done successfully */
+ break;
+ else if (rc != -EIO)
+ /* Data transfer failed, not recoverable */
+ return rc;
}
/* go and do it */
diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h
index b1a169d7d1ca..13e99cf65efe 100644
--- a/drivers/char/tpm/tpm_tis_core.h
+++ b/drivers/char/tpm/tpm_tis_core.h
@@ -34,6 +34,7 @@ enum tis_status {
TPM_STS_GO = 0x20,
TPM_STS_DATA_AVAIL = 0x10,
TPM_STS_DATA_EXPECT = 0x08,
+ TPM_STS_RESPONSE_RETRY = 0x02,
TPM_STS_READ_ZERO = 0x23, /* bits that must be zero on read */
};
diff --git a/drivers/char/tpm/tpm_tis_spi_main.c b/drivers/char/tpm/tpm_tis_spi_main.c
index 9bfaba092a06..a62f5c7f38d3 100644
--- a/drivers/char/tpm/tpm_tis_spi_main.c
+++ b/drivers/char/tpm/tpm_tis_spi_main.c
@@ -71,8 +71,74 @@ static int tpm_tis_spi_flow_control(struct tpm_tis_spi_phy *phy,
return 0;
}
-int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
- u8 *in, const u8 *out)
+/*
+ * Half duplex controller with support for TPM wait state detection like
+ * Tegra QSPI need CMD, ADDR & DATA sent in single message to manage HW flow
+ * control. Each phase sent in different transfer for controller to idenity
+ * phase.
+ */
+static int tpm_tis_spi_transfer_half(struct tpm_tis_data *data, u32 addr,
+ u16 len, u8 *in, const u8 *out)
+{
+ struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
+ struct spi_transfer spi_xfer[3];
+ struct spi_message m;
+ u8 transfer_len;
+ int ret;
+
+ while (len) {
+ transfer_len = min_t(u16, len, MAX_SPI_FRAMESIZE);
+
+ spi_message_init(&m);
+ phy->iobuf[0] = (in ? 0x80 : 0) | (transfer_len - 1);
+ phy->iobuf[1] = 0xd4;
+ phy->iobuf[2] = addr >> 8;
+ phy->iobuf[3] = addr;
+
+ memset(&spi_xfer, 0, sizeof(spi_xfer));
+
+ spi_xfer[0].tx_buf = phy->iobuf;
+ spi_xfer[0].len = 1;
+ spi_message_add_tail(&spi_xfer[0], &m);
+
+ spi_xfer[1].tx_buf = phy->iobuf + 1;
+ spi_xfer[1].len = 3;
+ spi_message_add_tail(&spi_xfer[1], &m);
+
+ if (out) {
+ spi_xfer[2].tx_buf = &phy->iobuf[4];
+ spi_xfer[2].rx_buf = NULL;
+ memcpy(&phy->iobuf[4], out, transfer_len);
+ out += transfer_len;
+ }
+
+ if (in) {
+ spi_xfer[2].tx_buf = NULL;
+ spi_xfer[2].rx_buf = &phy->iobuf[4];
+ }
+
+ spi_xfer[2].len = transfer_len;
+ spi_message_add_tail(&spi_xfer[2], &m);
+
+ reinit_completion(&phy->ready);
+
+ ret = spi_sync(phy->spi_device, &m);
+ if (ret < 0)
+ return ret;
+
+ if (in) {
+ memcpy(in, &phy->iobuf[4], transfer_len);
+ in += transfer_len;
+ }
+
+ len -= transfer_len;
+ }
+
+ return ret;
+}
+
+static int tpm_tis_spi_transfer_full(struct tpm_tis_data *data, u32 addr,
+ u16 len, u8 *in, const u8 *out)
{
struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
int ret = 0;
@@ -148,6 +214,24 @@ exit:
return ret;
}
+int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
+ u8 *in, const u8 *out)
+{
+ struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
+ struct spi_controller *ctlr = phy->spi_device->controller;
+
+ /*
+ * TPM flow control over SPI requires full duplex support.
+ * Send entire message to a half duplex controller to handle
+ * wait polling in controller.
+ * Set TPM HW flow control flag..
+ */
+ if (ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX)
+ return tpm_tis_spi_transfer_half(data, addr, len, in, out);
+ else
+ return tpm_tis_spi_transfer_full(data, addr, len, in, out);
+}
+
static int tpm_tis_spi_read_bytes(struct tpm_tis_data *data, u32 addr,
u16 len, u8 *result, enum tpm_tis_io_mode io_mode)
{
@@ -189,6 +273,9 @@ static int tpm_tis_spi_probe(struct spi_device *dev)
phy->flow_control = tpm_tis_spi_flow_control;
+ if (dev->controller->flags & SPI_CONTROLLER_HALF_DUPLEX)
+ dev->mode |= SPI_TPM_HW_FLOW;
+
/* If the SPI device has an IRQ then use that */
if (dev->irq > 0)
irq = dev->irq;
diff --git a/drivers/char/tpm/tpm_tis_synquacer.c b/drivers/char/tpm/tpm_tis_synquacer.c
index 49278746b0e2..f7d5e76b505e 100644
--- a/drivers/char/tpm/tpm_tis_synquacer.c
+++ b/drivers/char/tpm/tpm_tis_synquacer.c
@@ -162,23 +162,7 @@ static struct platform_driver tis_synquacer_drv = {
},
};
-static int __init tpm_tis_synquacer_module_init(void)
-{
- int rc;
-
- rc = platform_driver_register(&tis_synquacer_drv);
- if (rc)
- return rc;
-
- return 0;
-}
-
-static void __exit tpm_tis_synquacer_module_exit(void)
-{
- platform_driver_unregister(&tis_synquacer_drv);
-}
+module_platform_driver(tis_synquacer_drv);
-module_init(tpm_tis_synquacer_module_init);
-module_exit(tpm_tis_synquacer_module_exit);
MODULE_DESCRIPTION("TPM MMIO Driver for Socionext SynQuacer platform");
MODULE_LICENSE("GPL");
diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
index 8fadd561c50e..462f8a34cdf8 100644
--- a/include/crypto/public_key.h
+++ b/include/crypto/public_key.h
@@ -78,6 +78,10 @@ extern int restrict_link_by_ca(struct key *dest_keyring,
const struct key_type *type,
const union key_payload *payload,
struct key *trust_keyring);
+int restrict_link_by_digsig(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *trust_keyring);
#else
static inline int restrict_link_by_ca(struct key *dest_keyring,
const struct key_type *type,
@@ -86,6 +90,14 @@ static inline int restrict_link_by_ca(struct key *dest_keyring,
{
return 0;
}
+
+static inline int restrict_link_by_digsig(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *trust_keyring)
+{
+ return 0;
+}
#endif
extern int query_asymmetric_key(const struct kernel_pkey_params *,
diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
index 91e080efb918..8365adf842ef 100644
--- a/include/keys/system_keyring.h
+++ b/include/keys/system_keyring.h
@@ -23,10 +23,15 @@ extern int restrict_link_by_builtin_trusted(struct key *keyring,
const struct key_type *type,
const union key_payload *payload,
struct key *restriction_key);
+int restrict_link_by_digsig_builtin(struct key *dest_keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *restriction_key);
extern __init int load_module_cert(struct key *keyring);
#else
#define restrict_link_by_builtin_trusted restrict_link_reject
+#define restrict_link_by_digsig_builtin restrict_link_reject
static inline __init int load_module_cert(struct key *keyring)
{
@@ -41,8 +46,17 @@ extern int restrict_link_by_builtin_and_secondary_trusted(
const struct key_type *type,
const union key_payload *payload,
struct key *restriction_key);
+int restrict_link_by_digsig_builtin_and_secondary(struct key *keyring,
+ const struct key_type *type,
+ const union key_payload *payload,
+ struct key *restriction_key);
+void __init add_to_secondary_keyring(const char *source, const void *data, size_t len);
#else
#define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
+#define restrict_link_by_digsig_builtin_and_secondary restrict_link_by_digsig_builtin
+static inline void __init add_to_secondary_keyring(const char *source, const void *data, size_t len)
+{
+}
#endif
#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
diff --git a/security/integrity/Kconfig b/security/integrity/Kconfig
index ec6e0d789da1..232191ee09e3 100644
--- a/security/integrity/Kconfig
+++ b/security/integrity/Kconfig
@@ -67,7 +67,9 @@ config INTEGRITY_MACHINE_KEYRING
depends on SECONDARY_TRUSTED_KEYRING
depends on INTEGRITY_ASYMMETRIC_KEYS
depends on SYSTEM_BLACKLIST_KEYRING
- depends on LOAD_UEFI_KEYS
+ depends on LOAD_UEFI_KEYS || LOAD_PPC_KEYS
+ select INTEGRITY_CA_MACHINE_KEYRING if LOAD_PPC_KEYS
+ select INTEGRITY_CA_MACHINE_KEYRING_MAX if LOAD_PPC_KEYS
help
If set, provide a keyring to which Machine Owner Keys (MOK) may
be added. This keyring shall contain just MOK keys. Unlike keys
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 6f31ffe23c48..df387de29bfa 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -34,9 +34,9 @@ static const char * const keyring_name[INTEGRITY_KEYRING_MAX] = {
};
#ifdef CONFIG_IMA_KEYRINGS_PERMIT_SIGNED_BY_BUILTIN_OR_SECONDARY
-#define restrict_link_to_ima restrict_link_by_builtin_and_secondary_trusted
+#define restrict_link_to_ima restrict_link_by_digsig_builtin_and_secondary
#else
-#define restrict_link_to_ima restrict_link_by_builtin_trusted
+#define restrict_link_to_ima restrict_link_by_digsig_builtin
#endif
static struct key *integrity_keyring_from_id(const unsigned int id)
@@ -113,7 +113,7 @@ static int __init __integrity_init_keyring(const unsigned int id,
} else {
if (id == INTEGRITY_KEYRING_PLATFORM)
set_platform_trusted_keys(keyring[id]);
- if (id == INTEGRITY_KEYRING_MACHINE && trust_moklist())
+ if (id == INTEGRITY_KEYRING_MACHINE && imputed_trust_enabled())
set_machine_trusted_keys(keyring[id]);
if (id == INTEGRITY_KEYRING_IMA)
load_module_cert(keyring[id]);
diff --git a/security/integrity/evm/Kconfig b/security/integrity/evm/Kconfig
index a6e19d23e700..fba9ee359bc9 100644
--- a/security/integrity/evm/Kconfig
+++ b/security/integrity/evm/Kconfig
@@ -64,7 +64,8 @@ config EVM_LOAD_X509
This option enables X509 certificate loading from the kernel
onto the '.evm' trusted keyring. A public key can be used to
- verify EVM integrity starting from the 'init' process.
+ verify EVM integrity starting from the 'init' process. The
+ key must have digitalSignature usage set.
config EVM_X509_PATH
string "EVM X509 certificate path"
diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index 60a511c6b583..684425936c53 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -270,7 +270,8 @@ config IMA_KEYRINGS_PERMIT_SIGNED_BY_BUILTIN_OR_SECONDARY
help
Keys may be added to the IMA or IMA blacklist keyrings, if the
key is validly signed by a CA cert in the system built-in or
- secondary trusted keyrings.
+ secondary trusted keyrings. The key must also have the
+ digitalSignature usage set.
Intermediate keys between those the kernel has compiled in and the
IMA keys to be added may be added to the system secondary keyring,
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 7167a6e99bdc..d7553c93f5c0 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -320,13 +320,14 @@ static inline void __init add_to_platform_keyring(const char *source,
#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
void __init add_to_machine_keyring(const char *source, const void *data, size_t len);
-bool __init trust_moklist(void);
+bool __init imputed_trust_enabled(void);
#else
static inline void __init add_to_machine_keyring(const char *source,
const void *data, size_t len)
{
}
-static inline bool __init trust_moklist(void)
+
+static inline bool __init imputed_trust_enabled(void)
{
return false;
}
diff --git a/security/integrity/platform_certs/keyring_handler.c b/security/integrity/platform_certs/keyring_handler.c
index 8a1124e4d769..13ea17207902 100644
--- a/security/integrity/platform_certs/keyring_handler.c
+++ b/security/integrity/platform_certs/keyring_handler.c
@@ -61,7 +61,8 @@ __init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type)
__init efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type)
{
if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0) {
- if (IS_ENABLED(CONFIG_INTEGRITY_MACHINE_KEYRING) && trust_moklist())
+ if (IS_ENABLED(CONFIG_INTEGRITY_MACHINE_KEYRING) &&
+ imputed_trust_enabled())
return add_to_machine_keyring;
else
return add_to_platform_keyring;
@@ -69,6 +70,22 @@ __init efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type)
return NULL;
}
+__init efi_element_handler_t get_handler_for_ca_keys(const efi_guid_t *sig_type)
+{
+ if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+ return add_to_machine_keyring;
+
+ return NULL;
+}
+
+__init efi_element_handler_t get_handler_for_code_signing_keys(const efi_guid_t *sig_type)
+{
+ if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+ return add_to_secondary_keyring;
+
+ return NULL;
+}
+
/*
* Return the appropriate handler for particular signature list types found in
* the UEFI dbx and MokListXRT tables.
diff --git a/security/integrity/platform_certs/keyring_handler.h b/security/integrity/platform_certs/keyring_handler.h
index 212d894a8c0c..f92895cc50f6 100644
--- a/security/integrity/platform_certs/keyring_handler.h
+++ b/security/integrity/platform_certs/keyring_handler.h
@@ -30,6 +30,16 @@ efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type);
efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type);
/*
+ * Return the handler for particular signature list types for CA keys.
+ */
+efi_element_handler_t get_handler_for_ca_keys(const efi_guid_t *sig_type);
+
+/*
+ * Return the handler for particular signature list types for code signing keys.
+ */
+efi_element_handler_t get_handler_for_code_signing_keys(const efi_guid_t *sig_type);
+
+/*
* Return the handler for particular signature list types found in the dbx.
*/
efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type);
diff --git a/security/integrity/platform_certs/load_powerpc.c b/security/integrity/platform_certs/load_powerpc.c
index 170789dc63d2..c85febca3343 100644
--- a/security/integrity/platform_certs/load_powerpc.c
+++ b/security/integrity/platform_certs/load_powerpc.c
@@ -59,6 +59,8 @@ static __init void *get_cert_list(u8 *key, unsigned long keylen, u64 *size)
static int __init load_powerpc_certs(void)
{
void *db = NULL, *dbx = NULL, *data = NULL;
+ void *trustedca;
+ void *moduledb;
u64 dsize = 0;
u64 offset = 0;
int rc = 0;
@@ -120,6 +122,38 @@ static int __init load_powerpc_certs(void)
kfree(data);
}
+ data = get_cert_list("trustedcadb", 12, &dsize);
+ if (!data) {
+ pr_info("Couldn't get trustedcadb list from firmware\n");
+ } else if (IS_ERR(data)) {
+ rc = PTR_ERR(data);
+ pr_err("Error reading trustedcadb from firmware: %d\n", rc);
+ } else {
+ extract_esl(trustedca, data, dsize, offset);
+
+ rc = parse_efi_signature_list("powerpc:trustedca", trustedca, dsize,
+ get_handler_for_ca_keys);
+ if (rc)
+ pr_err("Couldn't parse trustedcadb signatures: %d\n", rc);
+ kfree(data);
+ }
+
+ data = get_cert_list("moduledb", 9, &dsize);
+ if (!data) {
+ pr_info("Couldn't get moduledb list from firmware\n");
+ } else if (IS_ERR(data)) {
+ rc = PTR_ERR(data);
+ pr_err("Error reading moduledb from firmware: %d\n", rc);
+ } else {
+ extract_esl(moduledb, data, dsize, offset);
+
+ rc = parse_efi_signature_list("powerpc:moduledb", moduledb, dsize,
+ get_handler_for_code_signing_keys);
+ if (rc)
+ pr_err("Couldn't parse moduledb signatures: %d\n", rc);
+ kfree(data);
+ }
+
return rc;
}
late_initcall(load_powerpc_certs);
diff --git a/security/integrity/platform_certs/machine_keyring.c b/security/integrity/platform_certs/machine_keyring.c
index 7aaed7950b6e..a401640a63cd 100644
--- a/security/integrity/platform_certs/machine_keyring.c
+++ b/security/integrity/platform_certs/machine_keyring.c
@@ -8,8 +8,6 @@
#include <linux/efi.h>
#include "../integrity.h"
-static bool trust_mok;
-
static __init int machine_keyring_init(void)
{
int rc;
@@ -36,7 +34,8 @@ void __init add_to_machine_keyring(const char *source, const void *data, size_t
* If the restriction check does not pass and the platform keyring
* is configured, try to add it into that keyring instead.
*/
- if (rc && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING))
+ if (rc && efi_enabled(EFI_BOOT) &&
+ IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING))
rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source,
data, len, perm);
@@ -62,12 +61,14 @@ static __init bool uefi_check_trust_mok_keys(void)
return false;
}
-bool __init trust_moklist(void)
+static bool __init trust_moklist(void)
{
static bool initialized;
+ static bool trust_mok;
if (!initialized) {
initialized = true;
+ trust_mok = false;
if (uefi_check_trust_mok_keys())
trust_mok = true;
@@ -75,3 +76,16 @@ bool __init trust_moklist(void)
return trust_mok;
}
+
+/*
+ * Provides platform specific check for trusting imputed keys before loading
+ * on .machine keyring. UEFI systems enable this trust based on a variable,
+ * and for other platforms, it is always enabled.
+ */
+bool __init imputed_trust_enabled(void)
+{
+ if (efi_enabled(EFI_BOOT))
+ return trust_moklist();
+
+ return true;
+}
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index 41e9735006d0..8f33cd170e42 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -178,7 +178,7 @@ struct key *request_key_auth_new(struct key *target, const char *op,
if (!rka->callout_info)
goto error_free_rka;
rka->callout_len = callout_len;
- strlcpy(rka->op, op, sizeof(rka->op));
+ strscpy(rka->op, op, sizeof(rka->op));
/* see if the calling process is already servicing the key request of
* another process */