From mboxrd@z Thu Jan 1 00:00:00 1970 From: PrasannaKumar Muralidharan Subject: Re: [PATCH v3] tpm: use struct tpm_chip for tpm_chip_find_get() Date: Thu, 26 Oct 2017 19:40:49 +0530 Message-ID: References: <20171026135453.24672-1-jarkko.sakkinen@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <20171026135453.24672-1-jarkko.sakkinen@linux.intel.com> Sender: owner-linux-security-module@vger.kernel.org To: Jarkko Sakkinen Cc: open list , Matt Mackall , Herbert Xu , Peter Huewe , Marcel Selhorst , Jason Gunthorpe , Mimi Zohar , Dmitry Kasatkin , James Morris , "Serge E. Hallyn" , David Safford , David Howells , Jerry Snitselaar , "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" , "moderated list:TPM DEVICE DRIVER" , "open list:INTEGRITY MEASUREMENT ARCHITECTURE (IMA)" List-Id: tpmdd-devel@lists.sourceforge.net Hi Jarkko, On 26 October 2017 at 19:24, Jarkko Sakkinen wrote: > Device number (the character device index) is not a stable identifier > for a TPM chip. That is the reason why every call site passes > TPM_ANY_NUM to tpm_chip_find_get(). > > This commit changes the API in a way that instead a struct tpm_chip > instance is given and NULL means the default chip. In addition, this > commit refines the documentation to be up to date with the > implementation. > > Suggested-by: Jason Gunthorpe (@chip_num -> @chip) > Signed-off-by: Jarkko Sakkinen > --- > v3: > * If chip != NULL was given to tpm_chip_find_get(), it tried to reserve chip > associated with the device number 0 instead of trying to reserve the given > chip instance. > v2: > * Further defined function documentation. > * Changed @chip_num to @chip instead of removing the parameter as suggested by > Jason Gunthorpe. > drivers/char/hw_random/tpm-rng.c | 2 +- > drivers/char/tpm/tpm-chip.c | 24 ++++--- > drivers/char/tpm/tpm-interface.c | 135 +++++++++++++++++++----------------- > drivers/char/tpm/tpm.h | 2 +- > include/linux/tpm.h | 38 +++++----- > security/integrity/ima/ima_crypto.c | 2 +- > security/integrity/ima/ima_init.c | 2 +- > security/integrity/ima/ima_queue.c | 2 +- > security/keys/trusted.c | 35 +++++----- > 9 files changed, 126 insertions(+), 116 deletions(-) > > diff --git a/drivers/char/hw_random/tpm-rng.c b/drivers/char/hw_random/tpm-rng.c > index d6d448266f07..c5e363825af0 100644 > --- a/drivers/char/hw_random/tpm-rng.c > +++ b/drivers/char/hw_random/tpm-rng.c > @@ -25,7 +25,7 @@ > > static int tpm_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) > { > - return tpm_get_random(TPM_ANY_NUM, data, max); > + return tpm_get_random(NULL, data, max); > } > > static struct hwrng tpm_rng = { > diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c > index a114e8f7fb90..bab9c14e040c 100644 > --- a/drivers/char/tpm/tpm-chip.c > +++ b/drivers/char/tpm/tpm-chip.c > @@ -81,21 +81,26 @@ void tpm_put_ops(struct tpm_chip *chip) > EXPORT_SYMBOL_GPL(tpm_put_ops); > > /** > - * tpm_chip_find_get() - return tpm_chip for a given chip number > - * @chip_num: id to find > + * tpm_chip_find_get() - find and reserve a TPM chip > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > * > - * The return'd chip has been tpm_try_get_ops'd and must be released via > - * tpm_put_ops > + * Finds a TPM chip and reserves its class device and operations. The chip must > + * be released with tpm_chip_put_ops() after use. > + * > + * Return: > + * A reserved &struct tpm_chip instance. > + * %NULL if a chip is not found. > + * %NULL if the chip is not available. > */ > -struct tpm_chip *tpm_chip_find_get(int chip_num) > +struct tpm_chip *tpm_chip_find_get(struct tpm_chip *chip) > { > - struct tpm_chip *chip, *res = NULL; > + struct tpm_chip *res = NULL; > + int chip_num = 0; > int chip_prev; > > mutex_lock(&idr_lock); > > - if (chip_num == TPM_ANY_NUM) { > - chip_num = 0; > + if (!chip) { > do { > chip_prev = chip_num; > chip = idr_get_next(&dev_nums_idr, &chip_num); > @@ -105,8 +110,7 @@ struct tpm_chip *tpm_chip_find_get(int chip_num) > } > } while (chip_prev != chip_num); > } else { > - chip = idr_find(&dev_nums_idr, chip_num); > - if (chip && !tpm_try_get_ops(chip)) > + if (!tpm_try_get_ops(chip)) > res = chip; > } > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c > index ebe0a1d36d8c..19f820f775b5 100644 > --- a/drivers/char/tpm/tpm-interface.c > +++ b/drivers/char/tpm/tpm-interface.c > @@ -809,19 +809,20 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf) > } > > /** > - * tpm_is_tpm2 - is the chip a TPM2 chip? > - * @chip_num: tpm idx # or ANY > + * tpm_is_tpm2 - do we a have a TPM2 chip? > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > * > - * Returns < 0 on error, and 1 or 0 on success depending whether the chip > - * is a TPM2 chip. > + * Return: > + * 1 if we have a TPM2 chip. > + * 0 if we don't have a TPM2 chip. > + * A negative number for system errors (errno). > */ > -int tpm_is_tpm2(u32 chip_num) > +int tpm_is_tpm2(struct tpm_chip *chip) > { > - struct tpm_chip *chip; > int rc; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL) > + chip = tpm_chip_find_get(chip); > + if (!chip) > return -ENODEV; > > rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0; > @@ -833,23 +834,19 @@ int tpm_is_tpm2(u32 chip_num) > EXPORT_SYMBOL_GPL(tpm_is_tpm2); > > /** > - * tpm_pcr_read - read a pcr value > - * @chip_num: tpm idx # or ANY > - * @pcr_idx: pcr idx to retrieve > - * @res_buf: TPM_PCR value > - * size of res_buf is 20 bytes (or NULL if you don't care) > + * tpm_pcr_read - read a PCR value from SHA1 bank > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @pcr_idx: the PCR to be retrieved > + * @res_buf: the value of the PCR > * > - * The TPM driver should be built-in, but for whatever reason it > - * isn't, protect against the chip disappearing, by incrementing > - * the module usage count. > + * Return: same as with tpm_transmit_cmd() > */ > -int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) > +int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf) > { > - struct tpm_chip *chip; > int rc; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL) > + chip = tpm_chip_find_get(chip); > + if (!chip) > return -ENODEV; > if (chip->flags & TPM_CHIP_FLAG_TPM2) > rc = tpm2_pcr_read(chip, pcr_idx, res_buf); > @@ -889,25 +886,26 @@ static int tpm1_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash, > } > > /** > - * tpm_pcr_extend - extend pcr value with hash > - * @chip_num: tpm idx # or AN& > - * @pcr_idx: pcr idx to extend > - * @hash: hash value used to extend pcr value > + * tpm_pcr_extend - extend a PCR value in SHA1 bank. > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @pcr_idx: the PCR to be retrieved > + * @hash: the hash value used to extend the PCR value > * > - * The TPM driver should be built-in, but for whatever reason it > - * isn't, protect against the chip disappearing, by incrementing > - * the module usage count. > + * Note: with TPM 2.0 extends also those banks with a known digest size to the > + * cryto subsystem in order to prevent malicious use of those PCR banks. In the > + * future we should dynamically determine digest sizes. > + * > + * Return: same as with tpm_transmit_cmd() > */ > -int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) > +int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash) > { > int rc; > - struct tpm_chip *chip; > struct tpm2_digest digest_list[ARRAY_SIZE(chip->active_banks)]; > u32 count = 0; > int i; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL) > + chip = tpm_chip_find_get(chip); > + if (!chip) > return -ENODEV; > > if (chip->flags & TPM_CHIP_FLAG_TPM2) { > @@ -1019,17 +1017,24 @@ int tpm1_auto_startup(struct tpm_chip *chip) > return rc; > } > > -int tpm_send(u32 chip_num, void *cmd, size_t buflen) > +/** > + * tpm_send - send a TPM command > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @cmd: a TPM command buffer > + * @buflen: the length of the TPM command buffer > + * > + * Return: same as with tpm_transmit_cmd() > + */ > +int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen) > { > - struct tpm_chip *chip; > int rc; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL) > + chip = tpm_chip_find_get(chip); > + if (!chip) > return -ENODEV; > > rc = tpm_transmit_cmd(chip, NULL, cmd, buflen, 0, 0, > - "attempting tpm_cmd"); > + "attempting to a send a command"); > tpm_put_ops(chip); > return rc; > } > @@ -1127,16 +1132,15 @@ static const struct tpm_input_header tpm_getrandom_header = { > }; > > /** > - * tpm_get_random() - Get random bytes from the tpm's RNG > - * @chip_num: A specific chip number for the request or TPM_ANY_NUM > - * @out: destination buffer for the random bytes > - * @max: the max number of bytes to write to @out > + * tpm_get_random() - get random bytes from the TPM's RNG > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @out: destination buffer for the random bytes > + * @max: the max number of bytes to write to @out > * > - * Returns < 0 on error and the number of bytes read on success > + * Return: same as with tpm_transmit_cmd() > */ > -int tpm_get_random(u32 chip_num, u8 *out, size_t max) > +int tpm_get_random(struct tpm_chip *chip, u8 *out, size_t max) > { > - struct tpm_chip *chip; > struct tpm_cmd_t tpm_cmd; > u32 recd, num_bytes = min_t(u32, max, TPM_MAX_RNG_DATA), rlength; > int err, total = 0, retries = 5; > @@ -1145,8 +1149,8 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max) > if (!out || !num_bytes || max > TPM_MAX_RNG_DATA) > return -EINVAL; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL) > + chip = tpm_chip_find_get(chip); > + if (!chip) > return -ENODEV; > > if (chip->flags & TPM_CHIP_FLAG_TPM2) { > @@ -1188,22 +1192,23 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max) > EXPORT_SYMBOL_GPL(tpm_get_random); > > /** > - * tpm_seal_trusted() - seal a trusted key > - * @chip_num: A specific chip number for the request or TPM_ANY_NUM > - * @options: authentication values and other options > - * @payload: the key data in clear and encrypted form > + * tpm_seal_trusted() - seal a trusted key payload > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @options: authentication values and other options > + * @payload: the key data in clear and encrypted form > + * > + * Note: only TPM 2.0 chip are supported. TPM 1.x implementation is located in > + * the keyring subsystem. > * > - * Returns < 0 on error and 0 on success. At the moment, only TPM 2.0 chips > - * are supported. > + * Return: same as with tpm_transmit_cmd() > */ > -int tpm_seal_trusted(u32 chip_num, struct trusted_key_payload *payload, > +int tpm_seal_trusted(struct tpm_chip *chip, struct trusted_key_payload *payload, > struct trusted_key_options *options) > { > - struct tpm_chip *chip; > int rc; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2)) > + chip = tpm_chip_find_get(chip); > + if (!chip || !(chip->flags & TPM_CHIP_FLAG_TPM2)) > return -ENODEV; > > rc = tpm2_seal_trusted(chip, payload, options); > @@ -1215,21 +1220,23 @@ EXPORT_SYMBOL_GPL(tpm_seal_trusted); > > /** > * tpm_unseal_trusted() - unseal a trusted key > - * @chip_num: A specific chip number for the request or TPM_ANY_NUM > - * @options: authentication values and other options > - * @payload: the key data in clear and encrypted form > + * @chip: a &struct tpm_chip instance, %NULL for the default chip > + * @options: authentication values and other options > + * @payload: the key data in clear and encrypted form > + * > + * Note: only TPM 2.0 chip are supported. TPM 1.x implementation is located in > + * the keyring subsystem. > * > - * Returns < 0 on error and 0 on success. At the moment, only TPM 2.0 chips > - * are supported. > + * Return: same as with tpm_transmit_cmd() > */ > -int tpm_unseal_trusted(u32 chip_num, struct trusted_key_payload *payload, > +int tpm_unseal_trusted(struct tpm_chip *chip, > + struct trusted_key_payload *payload, > struct trusted_key_options *options) > { > - struct tpm_chip *chip; > int rc; > > - chip = tpm_chip_find_get(chip_num); > - if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2)) > + chip = tpm_chip_find_get(chip); > + if (!chip || !(chip->flags & TPM_CHIP_FLAG_TPM2)) > return -ENODEV; > > rc = tpm2_unseal_trusted(chip, payload, options); > diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h > index c1866cc02e30..6c189174c0d3 100644 > --- a/drivers/char/tpm/tpm.h > +++ b/drivers/char/tpm/tpm.h > @@ -516,7 +516,7 @@ static inline void tpm_msleep(unsigned int delay_msec) > delay_msec * 1000); > }; > > -struct tpm_chip *tpm_chip_find_get(int chip_num); > +struct tpm_chip *tpm_chip_find_get(struct tpm_chip *chip); > __must_check int tpm_try_get_ops(struct tpm_chip *chip); > void tpm_put_ops(struct tpm_chip *chip); > > diff --git a/include/linux/tpm.h b/include/linux/tpm.h > index 5a090f5ab335..ddc9b88ff6d3 100644 > --- a/include/linux/tpm.h > +++ b/include/linux/tpm.h > @@ -24,11 +24,6 @@ > > #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */ > > -/* > - * Chip num is this value or a valid tpm idx > - */ > -#define TPM_ANY_NUM 0xFFFF > - > struct tpm_chip; > struct trusted_key_payload; > struct trusted_key_options; > @@ -54,42 +49,47 @@ struct tpm_class_ops { > > #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) > > -extern int tpm_is_tpm2(u32 chip_num); > -extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf); > -extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash); > -extern int tpm_send(u32 chip_num, void *cmd, size_t buflen); > -extern int tpm_get_random(u32 chip_num, u8 *data, size_t max); > -extern int tpm_seal_trusted(u32 chip_num, > +extern int tpm_is_tpm2(struct tpm_chip *chip); > +extern int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); > +extern int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash); > +extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen); > +extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max); > +extern int tpm_seal_trusted(struct tpm_chip *chip, > struct trusted_key_payload *payload, > struct trusted_key_options *options); > -extern int tpm_unseal_trusted(u32 chip_num, > +extern int tpm_unseal_trusted(struct tpm_chip *chip, > struct trusted_key_payload *payload, > struct trusted_key_options *options); > #else > -static inline int tpm_is_tpm2(u32 chip_num) > +static inline int tpm_is_tpm2(struct tpm_chip *chip) > { > return -ENODEV; > } > -static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) { > +static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf) > +{ > return -ENODEV; > } > -static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) { > +static inline int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, > + const u8 *hash) > +{ > return -ENODEV; > } > -static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) { > +static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen) > +{ > return -ENODEV; > } > -static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) { > +static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max) > +{ > return -ENODEV; > } > > -static inline int tpm_seal_trusted(u32 chip_num, > +static inline int tpm_seal_trusted(struct tpm_chip *chip, > struct trusted_key_payload *payload, > struct trusted_key_options *options) > { > return -ENODEV; > } > -static inline int tpm_unseal_trusted(u32 chip_num, > +static inline int tpm_unseal_trusted(struct tpm_chip *chip, > struct trusted_key_payload *payload, > struct trusted_key_options *options) > { > diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c > index 802d5d20f36f..3371d134ee62 100644 > --- a/security/integrity/ima/ima_crypto.c > +++ b/security/integrity/ima/ima_crypto.c > @@ -644,7 +644,7 @@ static void __init ima_pcrread(int idx, u8 *pcr) > if (!ima_used_chip) > return; > > - if (tpm_pcr_read(TPM_ANY_NUM, idx, pcr) != 0) > + if (tpm_pcr_read(NULL, idx, pcr) != 0) > pr_err("Error Communicating to TPM chip\n"); > } > > diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c > index 2967d497a665..29b72cd2502e 100644 > --- a/security/integrity/ima/ima_init.c > +++ b/security/integrity/ima/ima_init.c > @@ -110,7 +110,7 @@ int __init ima_init(void) > int rc; > > ima_used_chip = 0; > - rc = tpm_pcr_read(TPM_ANY_NUM, 0, pcr_i); > + rc = tpm_pcr_read(NULL, 0, pcr_i); > if (rc == 0) > ima_used_chip = 1; > > diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c > index a02a86d51102..418f35e38015 100644 > --- a/security/integrity/ima/ima_queue.c > +++ b/security/integrity/ima/ima_queue.c > @@ -145,7 +145,7 @@ static int ima_pcr_extend(const u8 *hash, int pcr) > if (!ima_used_chip) > return result; > > - result = tpm_pcr_extend(TPM_ANY_NUM, pcr, hash); > + result = tpm_pcr_extend(NULL, pcr, hash); > if (result != 0) > pr_err("Error Communicating to TPM chip, result: %d\n", result); > return result; > diff --git a/security/keys/trusted.c b/security/keys/trusted.c > index ddfaebf60fc8..d2b20b1cc2f1 100644 > --- a/security/keys/trusted.c > +++ b/security/keys/trusted.c > @@ -355,13 +355,12 @@ static int TSS_checkhmac2(unsigned char *buffer, > * For key specific tpm requests, we will generate and send our > * own TPM command packets using the drivers send function. > */ > -static int trusted_tpm_send(const u32 chip_num, unsigned char *cmd, > - size_t buflen) > +static int trusted_tpm_send(unsigned char *cmd, size_t buflen) > { > int rc; > > dump_tpm_buf(cmd); > - rc = tpm_send(chip_num, cmd, buflen); > + rc = tpm_send(NULL, cmd, buflen); > dump_tpm_buf(cmd); > if (rc > 0) > /* Can't return positive return codes values to keyctl */ > @@ -382,10 +381,10 @@ static int pcrlock(const int pcrnum) > > if (!capable(CAP_SYS_ADMIN)) > return -EPERM; > - ret = tpm_get_random(TPM_ANY_NUM, hash, SHA1_DIGEST_SIZE); > + ret = tpm_get_random(NULL, hash, SHA1_DIGEST_SIZE); > if (ret != SHA1_DIGEST_SIZE) > return ret; > - return tpm_pcr_extend(TPM_ANY_NUM, pcrnum, hash) ? -EINVAL : 0; > + return tpm_pcr_extend(NULL, pcrnum, hash) ? -EINVAL : 0; > } > > /* > @@ -398,7 +397,7 @@ static int osap(struct tpm_buf *tb, struct osapsess *s, > unsigned char ononce[TPM_NONCE_SIZE]; > int ret; > > - ret = tpm_get_random(TPM_ANY_NUM, ononce, TPM_NONCE_SIZE); > + ret = tpm_get_random(NULL, ononce, TPM_NONCE_SIZE); > if (ret != TPM_NONCE_SIZE) > return ret; > > @@ -410,7 +409,7 @@ static int osap(struct tpm_buf *tb, struct osapsess *s, > store32(tb, handle); > storebytes(tb, ononce, TPM_NONCE_SIZE); > > - ret = trusted_tpm_send(TPM_ANY_NUM, tb->data, MAX_BUF_SIZE); > + ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE); > if (ret < 0) > return ret; > > @@ -434,7 +433,7 @@ static int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce) > store16(tb, TPM_TAG_RQU_COMMAND); > store32(tb, TPM_OIAP_SIZE); > store32(tb, TPM_ORD_OIAP); > - ret = trusted_tpm_send(TPM_ANY_NUM, tb->data, MAX_BUF_SIZE); > + ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE); > if (ret < 0) > return ret; > > @@ -493,7 +492,7 @@ static int tpm_seal(struct tpm_buf *tb, uint16_t keytype, > if (ret < 0) > goto out; > > - ret = tpm_get_random(TPM_ANY_NUM, td->nonceodd, TPM_NONCE_SIZE); > + ret = tpm_get_random(NULL, td->nonceodd, TPM_NONCE_SIZE); > if (ret != TPM_NONCE_SIZE) > goto out; > ordinal = htonl(TPM_ORD_SEAL); > @@ -542,7 +541,7 @@ static int tpm_seal(struct tpm_buf *tb, uint16_t keytype, > store8(tb, cont); > storebytes(tb, td->pubauth, SHA1_DIGEST_SIZE); > > - ret = trusted_tpm_send(TPM_ANY_NUM, tb->data, MAX_BUF_SIZE); > + ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE); > if (ret < 0) > goto out; > > @@ -603,7 +602,7 @@ static int tpm_unseal(struct tpm_buf *tb, > > ordinal = htonl(TPM_ORD_UNSEAL); > keyhndl = htonl(SRKHANDLE); > - ret = tpm_get_random(TPM_ANY_NUM, nonceodd, TPM_NONCE_SIZE); > + ret = tpm_get_random(NULL, nonceodd, TPM_NONCE_SIZE); > if (ret != TPM_NONCE_SIZE) { > pr_info("trusted_key: tpm_get_random failed (%d)\n", ret); > return ret; > @@ -635,7 +634,7 @@ static int tpm_unseal(struct tpm_buf *tb, > store8(tb, cont); > storebytes(tb, authdata2, SHA1_DIGEST_SIZE); > > - ret = trusted_tpm_send(TPM_ANY_NUM, tb->data, MAX_BUF_SIZE); > + ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE); > if (ret < 0) { > pr_info("trusted_key: authhmac failed (%d)\n", ret); > return ret; > @@ -748,7 +747,7 @@ static int getoptions(char *c, struct trusted_key_payload *pay, > int i; > int tpm2; > > - tpm2 = tpm_is_tpm2(TPM_ANY_NUM); > + tpm2 = tpm_is_tpm2(NULL); > if (tpm2 < 0) > return tpm2; > > @@ -917,7 +916,7 @@ static struct trusted_key_options *trusted_options_alloc(void) > struct trusted_key_options *options; > int tpm2; > > - tpm2 = tpm_is_tpm2(TPM_ANY_NUM); > + tpm2 = tpm_is_tpm2(NULL); > if (tpm2 < 0) > return NULL; > > @@ -967,7 +966,7 @@ static int trusted_instantiate(struct key *key, > size_t key_len; > int tpm2; > > - tpm2 = tpm_is_tpm2(TPM_ANY_NUM); > + tpm2 = tpm_is_tpm2(NULL); > if (tpm2 < 0) > return tpm2; > > @@ -1008,7 +1007,7 @@ static int trusted_instantiate(struct key *key, > switch (key_cmd) { > case Opt_load: > if (tpm2) > - ret = tpm_unseal_trusted(TPM_ANY_NUM, payload, options); > + ret = tpm_unseal_trusted(NULL, payload, options); > else > ret = key_unseal(payload, options); > dump_payload(payload); > @@ -1018,13 +1017,13 @@ static int trusted_instantiate(struct key *key, > break; > case Opt_new: > key_len = payload->key_len; > - ret = tpm_get_random(TPM_ANY_NUM, payload->key, key_len); > + ret = tpm_get_random(NULL, payload->key, key_len); > if (ret != key_len) { > pr_info("trusted_key: key_create failed (%d)\n", ret); > goto out; > } > if (tpm2) > - ret = tpm_seal_trusted(TPM_ANY_NUM, payload, options); > + ret = tpm_seal_trusted(NULL, payload, options); > else > ret = key_seal(payload, options); > if (ret < 0) > -- > 2.14.1 > Looks good to me. FWIW, Reviewed-by: PrasannaKumar Muralidharan . Regards, PrasannaKumar