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Make all keyslot context types fully self-contained.

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Duplicate all dynamically allocated memory passed
keyslot context during initialization and make it
self contained.

Before current patch all pointers passed in keyslot
context initialization routines have to remain valid
for the duration of the keyslot context. Otherwise
memory violation could occur.

This patch fixes the issue in backward compatible
way so that we do not have to change API for all
keyslot contexts. As of now all dynamically allocated
memory can be freed right after keyslot context
initialization.
This commit is contained in:
Ondrej Kozina
2024-02-20 12:03:15 +01:00
committed by Milan Broz
parent 209e6167b5
commit 9311c923ca
4 changed files with 434 additions and 48 deletions
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4
lib/libcryptsetup.h
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@@ -1204,6 +1204,10 @@ void crypt_keyslot_context_free(struct crypt_keyslot_context *kc);
* @param kc returns crypt keyslot context handle type CRYPT_KC_TYPE_PASSPHRASE
*
* @return zero on success or negative errno otherwise.
*
* @note The original buffer containing passphrase passed in parameters does
* not have to be valid after context initialization. The context
* contains copy of the original before freed with @link crypt_keyslot_context_free @endlink.
*/
int crypt_keyslot_context_init_by_passphrase(struct crypt_device *cd,
const char *passphrase,