From aad887f6641145fec2a801da2ce4ed36cf99c6a5 Mon Sep 17 00:00:00 2001 From: Jarkko Sakkinen Date: Sun, 5 Nov 2017 13:16:26 +0200 Subject: tpm: use struct tpm_chip for tpm_chip_find_get() 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 part) Signed-off-by: Jarkko Sakkinen Reviewed-by: Jason Gunthorpe Tested-by: PrasannaKumar Muralidharan --- 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 +++++++++++++++++------------------ 4 files changed, 20 insertions(+), 21 deletions(-) (limited to 'security') diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 9057b163c378..205bc69361ea 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -632,7 +632,7 @@ 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 98aa89ff7bfd..423776682025 100644 --- a/security/keys/trusted.c +++ b/security/keys/trusted.c @@ -355,13 +355,12 @@ out: * 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) -- cgit v1.2.3-59-g8ed1b