From: Stefan Berger <stefanb@linux.vnet.ibm.com> To: tpmdd-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, jarkko.sakkinen@linux.intel.com Cc: jgunthorpe@obsidianresearch.com, linux-kernel@vger.kernel.org, Stefan Berger <stefanb@linux.vnet.ibm.com> Subject: [PATCH v5 2/2] tpm: vtpm_proxy: Implement request_locality function. Date: Mon, 15 May 2017 12:51:45 -0400 [thread overview] Message-ID: <1494867105-30722-3-git-send-email-stefanb@linux.vnet.ibm.com> (raw) In-Reply-To: <1494867105-30722-1-git-send-email-stefanb@linux.vnet.ibm.com> Implement the request_locality function. To set the locality on the backend we define vendor-specific TPM 1.2 and TPM 2 ordinals and send a command to the backend to set the locality for the next commands. To avoid recursing into requesting the locality, we set the TPM_TRASNMIT_RAW flag when calling tpm_trasnmit_cmd. To avoid recursing into TPM 2 space related commands, we set the space parameter to NULL. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- drivers/char/tpm/tpm-interface.c | 1 + drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/vtpm_proxy.h | 4 ++++ 3 files changed, 41 insertions(+) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 2eacda2..876d45f 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space, return 0; } +EXPORT_SYMBOL_GPL(tpm_transmit_cmd); #define TPM_DIGEST_SIZE 20 #define TPM_RET_CODE_IDX 6 diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index 751059d..66024bf 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -371,6 +371,41 @@ static bool vtpm_proxy_tpm_req_canceled(struct tpm_chip *chip, u8 status) return ret; } +static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality) +{ + struct tpm_buf buf; + int rc; + const struct tpm_output_header *header; + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, + TPM2_CC_SET_LOCALITY); + else + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, + TPM_ORD_SET_LOCALITY); + if (rc) + return rc; + tpm_buf_append_u8(&buf, locality); + + rc = tpm_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0, + TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW, + "attempting to set locality"); + if (rc < 0) { + locality = rc; + goto out; + } + + header = (const struct tpm_output_header *)buf.data; + rc = be32_to_cpu(header->return_code); + if (rc) + locality = -1; + +out: + tpm_buf_destroy(&buf); + + return locality; +} + static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .flags = TPM_OPS_AUTO_STARTUP, .recv = vtpm_proxy_tpm_op_recv, @@ -380,6 +415,7 @@ static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .req_complete_mask = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_complete_val = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_canceled = vtpm_proxy_tpm_req_canceled, + .request_locality = vtpm_proxy_request_locality, }; /* diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h index a69e991..58ac73c 100644 --- a/include/uapi/linux/vtpm_proxy.h +++ b/include/uapi/linux/vtpm_proxy.h @@ -46,4 +46,8 @@ struct vtpm_proxy_new_dev { #define VTPM_PROXY_IOC_NEW_DEV _IOWR(0xa1, 0x00, struct vtpm_proxy_new_dev) +/* vendor specific commands to set locality */ +#define TPM2_CC_SET_LOCALITY 0x20001000 +#define TPM_ORD_SET_LOCALITY 0x20001000 + #endif /* _UAPI_LINUX_VTPM_PROXY_H */ -- 2.4.3
WARNING: multiple messages have this Message-ID (diff)
From: stefanb@linux.vnet.ibm.com (Stefan Berger) To: linux-security-module@vger.kernel.org Subject: [PATCH v5 2/2] tpm: vtpm_proxy: Implement request_locality function. Date: Mon, 15 May 2017 12:51:45 -0400 [thread overview] Message-ID: <1494867105-30722-3-git-send-email-stefanb@linux.vnet.ibm.com> (raw) In-Reply-To: <1494867105-30722-1-git-send-email-stefanb@linux.vnet.ibm.com> Implement the request_locality function. To set the locality on the backend we define vendor-specific TPM 1.2 and TPM 2 ordinals and send a command to the backend to set the locality for the next commands. To avoid recursing into requesting the locality, we set the TPM_TRASNMIT_RAW flag when calling tpm_trasnmit_cmd. To avoid recursing into TPM 2 space related commands, we set the space parameter to NULL. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- drivers/char/tpm/tpm-interface.c | 1 + drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/vtpm_proxy.h | 4 ++++ 3 files changed, 41 insertions(+) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 2eacda2..876d45f 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space, return 0; } +EXPORT_SYMBOL_GPL(tpm_transmit_cmd); #define TPM_DIGEST_SIZE 20 #define TPM_RET_CODE_IDX 6 diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index 751059d..66024bf 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -371,6 +371,41 @@ static bool vtpm_proxy_tpm_req_canceled(struct tpm_chip *chip, u8 status) return ret; } +static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality) +{ + struct tpm_buf buf; + int rc; + const struct tpm_output_header *header; + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, + TPM2_CC_SET_LOCALITY); + else + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, + TPM_ORD_SET_LOCALITY); + if (rc) + return rc; + tpm_buf_append_u8(&buf, locality); + + rc = tpm_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0, + TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW, + "attempting to set locality"); + if (rc < 0) { + locality = rc; + goto out; + } + + header = (const struct tpm_output_header *)buf.data; + rc = be32_to_cpu(header->return_code); + if (rc) + locality = -1; + +out: + tpm_buf_destroy(&buf); + + return locality; +} + static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .flags = TPM_OPS_AUTO_STARTUP, .recv = vtpm_proxy_tpm_op_recv, @@ -380,6 +415,7 @@ static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .req_complete_mask = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_complete_val = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_canceled = vtpm_proxy_tpm_req_canceled, + .request_locality = vtpm_proxy_request_locality, }; /* diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h index a69e991..58ac73c 100644 --- a/include/uapi/linux/vtpm_proxy.h +++ b/include/uapi/linux/vtpm_proxy.h @@ -46,4 +46,8 @@ struct vtpm_proxy_new_dev { #define VTPM_PROXY_IOC_NEW_DEV _IOWR(0xa1, 0x00, struct vtpm_proxy_new_dev) +/* vendor specific commands to set locality */ +#define TPM2_CC_SET_LOCALITY 0x20001000 +#define TPM_ORD_SET_LOCALITY 0x20001000 + #endif /* _UAPI_LINUX_VTPM_PROXY_H */ -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2017-05-15 16:52 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-15 16:51 [PATCH v5 0/2] Extend the vTPM proxy driver to pass locality Stefan Berger 2017-05-15 16:51 ` Stefan Berger 2017-05-15 16:51 ` [PATCH v5 1/2] tpm: Introduce flag TPM_TRANSMIT_RAW Stefan Berger 2017-05-15 16:51 ` Stefan Berger 2017-05-15 16:51 ` Stefan Berger 2017-05-24 19:23 ` Jarkko Sakkinen 2017-05-24 19:23 ` Jarkko Sakkinen 2017-05-15 16:51 ` Stefan Berger [this message] 2017-05-15 16:51 ` [PATCH v5 2/2] tpm: vtpm_proxy: Implement request_locality function Stefan Berger 2017-05-20 12:40 ` Jarkko Sakkinen 2017-05-20 12:40 ` Jarkko Sakkinen 2017-05-22 14:29 ` Stefan Berger 2017-05-22 14:29 ` Stefan Berger 2017-05-24 19:27 ` Jarkko Sakkinen 2017-05-24 19:27 ` Jarkko Sakkinen
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