[PATCH v10, RESEND 5/6] KEYS: trusted: explicitly use tpm_chip structure from tpm_default_chip()
From: Roberto Sassu <roberto.sassu@huawei.com>
Date: 2019-02-06 16:30:15
Also in:
keyrings, linux-integrity, lkml
Subsystem:
keys/keyrings, security subsystem, the rest · Maintainers:
David Howells, Jarkko Sakkinen, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
When crypto agility support will be added to the TPM driver, users of the driver have to retrieve the allocated banks from chip->allocated_banks and use this information to prepare the array of tpm_digest structures to be passed to tpm_pcr_extend(). This patch retrieves a tpm_chip pointer from tpm_default_chip() so that the pointer can be used to prepare the array of tpm_digest structures. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Reviewed-by: Jarkko Sakkinen <redacted> Tested-by: Jarkko Sakkinen <redacted> --- security/keys/trusted.c | 38 ++++++++++++++++++++++++-------------- 1 file changed, 24 insertions(+), 14 deletions(-)
diff --git a/security/keys/trusted.c b/security/keys/trusted.c
index 4d98f4f87236..5b852263eae1 100644
--- a/security/keys/trusted.c
+++ b/security/keys/trusted.c@@ -34,6 +34,7 @@ static const char hmac_alg[] = "hmac(sha1)"; static const char hash_alg[] = "sha1"; +static struct tpm_chip *chip; struct sdesc { struct shash_desc shash;
@@ -362,7 +363,7 @@ int trusted_tpm_send(unsigned char *cmd, size_t buflen) int rc; dump_tpm_buf(cmd); - rc = tpm_send(NULL, cmd, buflen); + rc = tpm_send(chip, cmd, buflen); dump_tpm_buf(cmd); if (rc > 0) /* Can't return positive return codes values to keyctl */
@@ -384,10 +385,10 @@ static int pcrlock(const int pcrnum) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - ret = tpm_get_random(NULL, hash, SHA1_DIGEST_SIZE); + ret = tpm_get_random(chip, hash, SHA1_DIGEST_SIZE); if (ret != SHA1_DIGEST_SIZE) return ret; - return tpm_pcr_extend(NULL, pcrnum, hash) ? -EINVAL : 0; + return tpm_pcr_extend(chip, pcrnum, hash) ? -EINVAL : 0; } /*
@@ -400,7 +401,7 @@ static int osap(struct tpm_buf *tb, struct osapsess *s, unsigned char ononce[TPM_NONCE_SIZE]; int ret; - ret = tpm_get_random(NULL, ononce, TPM_NONCE_SIZE); + ret = tpm_get_random(chip, ononce, TPM_NONCE_SIZE); if (ret != TPM_NONCE_SIZE) return ret;
@@ -496,7 +497,7 @@ static int tpm_seal(struct tpm_buf *tb, uint16_t keytype, if (ret < 0) goto out; - ret = tpm_get_random(NULL, td->nonceodd, TPM_NONCE_SIZE); + ret = tpm_get_random(chip, td->nonceodd, TPM_NONCE_SIZE); if (ret != TPM_NONCE_SIZE) goto out; ordinal = htonl(TPM_ORD_SEAL);
@@ -606,7 +607,7 @@ static int tpm_unseal(struct tpm_buf *tb, ordinal = htonl(TPM_ORD_UNSEAL); keyhndl = htonl(SRKHANDLE); - ret = tpm_get_random(NULL, nonceodd, TPM_NONCE_SIZE); + ret = tpm_get_random(chip, nonceodd, TPM_NONCE_SIZE); if (ret != TPM_NONCE_SIZE) { pr_info("trusted_key: tpm_get_random failed (%d)\n", ret); return ret;
@@ -751,7 +752,7 @@ static int getoptions(char *c, struct trusted_key_payload *pay, int i; int tpm2; - tpm2 = tpm_is_tpm2(NULL); + tpm2 = tpm_is_tpm2(chip); if (tpm2 < 0) return tpm2;
@@ -920,7 +921,7 @@ static struct trusted_key_options *trusted_options_alloc(void) struct trusted_key_options *options; int tpm2; - tpm2 = tpm_is_tpm2(NULL); + tpm2 = tpm_is_tpm2(chip); if (tpm2 < 0) return NULL;
@@ -970,7 +971,7 @@ static int trusted_instantiate(struct key *key, size_t key_len; int tpm2; - tpm2 = tpm_is_tpm2(NULL); + tpm2 = tpm_is_tpm2(chip); if (tpm2 < 0) return tpm2;
@@ -1011,7 +1012,7 @@ static int trusted_instantiate(struct key *key, switch (key_cmd) { case Opt_load: if (tpm2) - ret = tpm_unseal_trusted(NULL, payload, options); + ret = tpm_unseal_trusted(chip, payload, options); else ret = key_unseal(payload, options); dump_payload(payload);
@@ -1021,13 +1022,13 @@ static int trusted_instantiate(struct key *key, break; case Opt_new: key_len = payload->key_len; - ret = tpm_get_random(NULL, payload->key, key_len); + ret = tpm_get_random(chip, 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(NULL, payload, options); + ret = tpm_seal_trusted(chip, payload, options); else ret = key_seal(payload, options); if (ret < 0)
@@ -1225,17 +1226,26 @@ static int __init init_trusted(void) { int ret; + chip = tpm_default_chip(); + if (!chip) + return -ENOENT; ret = trusted_shash_alloc(); if (ret < 0) - return ret; + goto err_put; ret = register_key_type(&key_type_trusted); if (ret < 0) - trusted_shash_release(); + goto err_release; + return 0; +err_release: + trusted_shash_release(); +err_put: + put_device(&chip->dev); return ret; } static void __exit cleanup_trusted(void) { + put_device(&chip->dev); trusted_shash_release(); unregister_key_type(&key_type_trusted); }
--
2.17.1