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KEYS: trusted: allow trusted.ko to initialize w/o a TPM
Allow trusted.ko to initialize w/o a TPM. This commit also adds checks
to the exported functions to fail when a TPM is not available.
Fixes: 240730437d
("KEYS: trusted: explicitly use tpm_chip structure...")
Cc: James Morris <jmorris@namei.org>
Reported-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
parent
7110629263
commit
c78719203f
@ -135,6 +135,9 @@ int TSS_authhmac(unsigned char *digest, const unsigned char *key,
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int ret;
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va_list argp;
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if (!chip)
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return -ENODEV;
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sdesc = init_sdesc(hashalg);
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if (IS_ERR(sdesc)) {
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pr_info("trusted_key: can't alloc %s\n", hash_alg);
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@ -196,6 +199,9 @@ int TSS_checkhmac1(unsigned char *buffer,
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va_list argp;
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int ret;
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if (!chip)
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return -ENODEV;
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bufsize = LOAD32(buffer, TPM_SIZE_OFFSET);
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tag = LOAD16(buffer, 0);
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ordinal = command;
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@ -363,6 +369,9 @@ int trusted_tpm_send(unsigned char *cmd, size_t buflen)
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{
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int rc;
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if (!chip)
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return -ENODEV;
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dump_tpm_buf(cmd);
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rc = tpm_send(chip, cmd, buflen);
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dump_tpm_buf(cmd);
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@ -429,6 +438,9 @@ int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce)
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{
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int ret;
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if (!chip)
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return -ENODEV;
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INIT_BUF(tb);
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store16(tb, TPM_TAG_RQU_COMMAND);
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store32(tb, TPM_OIAP_SIZE);
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@ -1245,9 +1257,13 @@ static int __init init_trusted(void)
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{
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int ret;
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/* encrypted_keys.ko depends on successful load of this module even if
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* TPM is not used.
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*/
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chip = tpm_default_chip();
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if (!chip)
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return -ENOENT;
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return 0;
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ret = init_digests();
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if (ret < 0)
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goto err_put;
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@ -1269,10 +1285,12 @@ err_put:
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static void __exit cleanup_trusted(void)
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{
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put_device(&chip->dev);
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kfree(digests);
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trusted_shash_release();
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unregister_key_type(&key_type_trusted);
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if (chip) {
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put_device(&chip->dev);
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kfree(digests);
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trusted_shash_release();
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unregister_key_type(&key_type_trusted);
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}
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}
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late_initcall(init_trusted);
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