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43 lines
1.2 KiB
43 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2010 IBM Corporation |
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* Copyright (C) 2010 Politecnico di Torino, Italy |
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* TORSEC group -- https://security.polito.it |
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* |
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* Authors: |
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* Mimi Zohar <[email protected]> |
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* Roberto Sassu <[email protected]> |
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* |
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* See Documentation/security/keys/trusted-encrypted.rst |
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*/ |
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#include <linux/uaccess.h> |
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#include <linux/err.h> |
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#include <keys/trusted-type.h> |
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#include <keys/encrypted-type.h> |
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#include "encrypted.h" |
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/* |
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* request_trusted_key - request the trusted key |
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* |
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* Trusted keys are sealed to PCRs and other metadata. Although userspace |
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* manages both trusted/encrypted key-types, like the encrypted key type |
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* data, trusted key type data is not visible decrypted from userspace. |
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*/ |
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struct key *request_trusted_key(const char *trusted_desc, |
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const u8 **master_key, size_t *master_keylen) |
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{ |
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struct trusted_key_payload *tpayload; |
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struct key *tkey; |
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tkey = request_key(&key_type_trusted, trusted_desc, NULL); |
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if (IS_ERR(tkey)) |
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goto error; |
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down_read(&tkey->sem); |
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tpayload = tkey->payload.data[0]; |
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*master_key = tpayload->key; |
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*master_keylen = tpayload->key_len; |
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error: |
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return tkey; |
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}
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