mirror of
https://github.com/torvalds/linux
synced 2024-10-20 18:28:21 +00:00
888edbc488
This patch adds support for a new key blob format to the pkey kernel module. The new key blob comprises a clear key value together with key type information. The implementation tries to derive an protected key from the blob with the clear key value inside with 1) the PCKMO instruction. This may fail as the LPAR profile may disable this way. 2) Generate an CCA AES secure data key with exact the clear key value. This requires to have a working crypto card in CCA Coprocessor mode. Then derive an protected key from the CCA AES secure key again with the help of a working crypto card in CCA mode. If both way fail, the transformation of the clear key blob into a protected key will fail. For the PAES cipher this would result in a failure at setkey() invocation. A clear key value exposed in main memory is a security risk. The intention of this new 'clear key blob' support for pkey is to provide self-tests for the PAES cipher key implementation. These known answer tests obviously need to be run with well known key values. So with the clear key blob format there is a way to provide knwon answer tests together with an pkey clear key blob for the in-kernel self tests done at cipher registration. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
219 lines
7.7 KiB
C
219 lines
7.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright IBM Corp. 2019
|
|
* Author(s): Harald Freudenberger <freude@linux.ibm.com>
|
|
* Ingo Franzki <ifranzki@linux.ibm.com>
|
|
*
|
|
* Collection of CCA misc functions used by zcrypt and pkey
|
|
*/
|
|
|
|
#ifndef _ZCRYPT_CCAMISC_H_
|
|
#define _ZCRYPT_CCAMISC_H_
|
|
|
|
#include <asm/zcrypt.h>
|
|
#include <asm/pkey.h>
|
|
|
|
/* Key token types */
|
|
#define TOKTYPE_NON_CCA 0x00 /* Non-CCA key token */
|
|
#define TOKTYPE_CCA_INTERNAL 0x01 /* CCA internal key token */
|
|
|
|
/* For TOKTYPE_NON_CCA: */
|
|
#define TOKVER_PROTECTED_KEY 0x01 /* Protected key token */
|
|
#define TOKVER_CLEAR_KEY 0x02 /* Clear key token */
|
|
|
|
/* For TOKTYPE_CCA_INTERNAL: */
|
|
#define TOKVER_CCA_AES 0x04 /* CCA AES key token */
|
|
#define TOKVER_CCA_VLSC 0x05 /* var length sym cipher key token */
|
|
|
|
/* Max size of a cca variable length cipher key token */
|
|
#define MAXCCAVLSCTOKENSIZE 725
|
|
|
|
/* header part of a CCA key token */
|
|
struct keytoken_header {
|
|
u8 type; /* one of the TOKTYPE values */
|
|
u8 res0[1];
|
|
u16 len; /* vlsc token: total length in bytes */
|
|
u8 version; /* one of the TOKVER values */
|
|
u8 res1[3];
|
|
} __packed;
|
|
|
|
/* inside view of a CCA secure key token (only type 0x01 version 0x04) */
|
|
struct secaeskeytoken {
|
|
u8 type; /* 0x01 for internal key token */
|
|
u8 res0[3];
|
|
u8 version; /* should be 0x04 */
|
|
u8 res1[1];
|
|
u8 flag; /* key flags */
|
|
u8 res2[1];
|
|
u64 mkvp; /* master key verification pattern */
|
|
u8 key[32]; /* key value (encrypted) */
|
|
u8 cv[8]; /* control vector */
|
|
u16 bitsize; /* key bit size */
|
|
u16 keysize; /* key byte size */
|
|
u8 tvv[4]; /* token validation value */
|
|
} __packed;
|
|
|
|
/* inside view of a variable length symmetric cipher AES key token */
|
|
struct cipherkeytoken {
|
|
u8 type; /* 0x01 for internal key token */
|
|
u8 res0[1];
|
|
u16 len; /* total key token length in bytes */
|
|
u8 version; /* should be 0x05 */
|
|
u8 res1[3];
|
|
u8 kms; /* key material state, 0x03 means wrapped with MK */
|
|
u8 kvpt; /* key verification pattern type, should be 0x01 */
|
|
u64 mkvp0; /* master key verification pattern, lo part */
|
|
u64 mkvp1; /* master key verification pattern, hi part (unused) */
|
|
u8 eskwm; /* encrypted section key wrapping method */
|
|
u8 hashalg; /* hash algorithmus used for wrapping key */
|
|
u8 plfver; /* pay load format version */
|
|
u8 res2[1];
|
|
u8 adsver; /* associated data section version */
|
|
u8 res3[1];
|
|
u16 adslen; /* associated data section length */
|
|
u8 kllen; /* optional key label length */
|
|
u8 ieaslen; /* optional extended associated data length */
|
|
u8 uadlen; /* optional user definable associated data length */
|
|
u8 res4[1];
|
|
u16 wpllen; /* wrapped payload length in bits: */
|
|
/* plfver 0x00 0x01 */
|
|
/* AES-128 512 640 */
|
|
/* AES-192 576 640 */
|
|
/* AES-256 640 640 */
|
|
u8 res5[1];
|
|
u8 algtype; /* 0x02 for AES cipher */
|
|
u16 keytype; /* 0x0001 for 'cipher' */
|
|
u8 kufc; /* key usage field count */
|
|
u16 kuf1; /* key usage field 1 */
|
|
u16 kuf2; /* key usage field 2 */
|
|
u8 kmfc; /* key management field count */
|
|
u16 kmf1; /* key management field 1 */
|
|
u16 kmf2; /* key management field 2 */
|
|
u16 kmf3; /* key management field 3 */
|
|
u8 vdata[0]; /* variable part data follows */
|
|
} __packed;
|
|
|
|
/* Some defines for the CCA AES cipherkeytoken kmf1 field */
|
|
#define KMF1_XPRT_SYM 0x8000
|
|
#define KMF1_XPRT_UASY 0x4000
|
|
#define KMF1_XPRT_AASY 0x2000
|
|
#define KMF1_XPRT_RAW 0x1000
|
|
#define KMF1_XPRT_CPAC 0x0800
|
|
#define KMF1_XPRT_DES 0x0080
|
|
#define KMF1_XPRT_AES 0x0040
|
|
#define KMF1_XPRT_RSA 0x0008
|
|
|
|
/*
|
|
* Simple check if the token is a valid CCA secure AES data key
|
|
* token. If keybitsize is given, the bitsize of the key is
|
|
* also checked. Returns 0 on success or errno value on failure.
|
|
*/
|
|
int cca_check_secaeskeytoken(debug_info_t *dbg, int dbflvl,
|
|
const u8 *token, int keybitsize);
|
|
|
|
/*
|
|
* Simple check if the token is a valid CCA secure AES cipher key
|
|
* token. If keybitsize is given, the bitsize of the key is
|
|
* also checked. If checkcpacfexport is enabled, the key is also
|
|
* checked for the export flag to allow CPACF export.
|
|
* Returns 0 on success or errno value on failure.
|
|
*/
|
|
int cca_check_secaescipherkey(debug_info_t *dbg, int dbflvl,
|
|
const u8 *token, int keybitsize,
|
|
int checkcpacfexport);
|
|
|
|
/*
|
|
* Generate (random) CCA AES DATA secure key.
|
|
*/
|
|
int cca_genseckey(u16 cardnr, u16 domain, u32 keybitsize, u8 *seckey);
|
|
|
|
/*
|
|
* Generate CCA AES DATA secure key with given clear key value.
|
|
*/
|
|
int cca_clr2seckey(u16 cardnr, u16 domain, u32 keybitsize,
|
|
const u8 *clrkey, u8 *seckey);
|
|
|
|
/*
|
|
* Derive proteced key from an CCA AES DATA secure key.
|
|
*/
|
|
int cca_sec2protkey(u16 cardnr, u16 domain,
|
|
const u8 seckey[SECKEYBLOBSIZE],
|
|
u8 *protkey, u32 *protkeylen, u32 *protkeytype);
|
|
|
|
/*
|
|
* Generate (random) CCA AES CIPHER secure key.
|
|
*/
|
|
int cca_gencipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags,
|
|
u8 *keybuf, size_t *keybufsize);
|
|
|
|
/*
|
|
* Derive proteced key from CCA AES cipher secure key.
|
|
*/
|
|
int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey,
|
|
u8 *protkey, u32 *protkeylen, u32 *protkeytype);
|
|
|
|
/*
|
|
* Build CCA AES CIPHER secure key with a given clear key value.
|
|
*/
|
|
int cca_clr2cipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags,
|
|
const u8 *clrkey, u8 *keybuf, size_t *keybufsize);
|
|
|
|
/*
|
|
* Query cryptographic facility from CCA adapter
|
|
*/
|
|
int cca_query_crypto_facility(u16 cardnr, u16 domain,
|
|
const char *keyword,
|
|
u8 *rarray, size_t *rarraylen,
|
|
u8 *varray, size_t *varraylen);
|
|
|
|
/*
|
|
* Search for a matching crypto card based on the Master Key
|
|
* Verification Pattern provided inside a secure key.
|
|
* Works with CCA AES data and cipher keys.
|
|
* Returns < 0 on failure, 0 if CURRENT MKVP matches and
|
|
* 1 if OLD MKVP matches.
|
|
*/
|
|
int cca_findcard(const u8 *key, u16 *pcardnr, u16 *pdomain, int verify);
|
|
|
|
/*
|
|
* Build a list of cca apqns meeting the following constrains:
|
|
* - apqn is online and is in fact a CCA apqn
|
|
* - if cardnr is not FFFF only apqns with this cardnr
|
|
* - if domain is not FFFF only apqns with this domainnr
|
|
* - if minhwtype > 0 only apqns with hwtype >= minhwtype
|
|
* - if cur_mkvp != 0 only apqns where cur_mkvp == mkvp
|
|
* - if old_mkvp != 0 only apqns where old_mkvp == mkvp
|
|
* - if verify is enabled and a cur_mkvp and/or old_mkvp
|
|
* value is given, then refetch the cca_info and make sure the current
|
|
* cur_mkvp or old_mkvp values of the apqn are used.
|
|
* The array of apqn entries is allocated with kmalloc and returned in *apqns;
|
|
* the number of apqns stored into the list is returned in *nr_apqns. One apqn
|
|
* entry is simple a 32 bit value with 16 bit cardnr and 16 bit domain nr and
|
|
* may be casted to struct pkey_apqn. The return value is either 0 for success
|
|
* or a negative errno value. If no apqn meeting the criterias is found,
|
|
* -ENODEV is returned.
|
|
*/
|
|
int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
|
|
int minhwtype, u64 cur_mkvp, u64 old_mkvp, int verify);
|
|
|
|
/* struct to hold info for each CCA queue */
|
|
struct cca_info {
|
|
int hwtype; /* one of the defined AP_DEVICE_TYPE_* */
|
|
char new_mk_state; /* '1' empty, '2' partially full, '3' full */
|
|
char cur_mk_state; /* '1' invalid, '2' valid */
|
|
char old_mk_state; /* '1' invalid, '2' valid */
|
|
u64 new_mkvp; /* truncated sha256 hash of new master key */
|
|
u64 cur_mkvp; /* truncated sha256 hash of current master key */
|
|
u64 old_mkvp; /* truncated sha256 hash of old master key */
|
|
char serial[9]; /* serial number string (8 ascii numbers + 0x00) */
|
|
};
|
|
|
|
/*
|
|
* Fetch cca information about an CCA queue.
|
|
*/
|
|
int cca_get_info(u16 card, u16 dom, struct cca_info *ci, int verify);
|
|
|
|
void zcrypt_ccamisc_exit(void);
|
|
|
|
#endif /* _ZCRYPT_CCAMISC_H_ */
|