448 lines
20 KiB
C
448 lines
20 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Userspace interface to the pkey device driver
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*
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* Copyright IBM Corp. 2017, 2019
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*
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* Author: Harald Freudenberger <freude@de.ibm.com>
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*
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*/
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#ifndef _UAPI_PKEY_H
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#define _UAPI_PKEY_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* Ioctl calls supported by the pkey device driver
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*/
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#define PKEY_IOCTL_MAGIC 'p'
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#define SECKEYBLOBSIZE 64 /* secure key blob size is always 64 bytes */
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#define PROTKEYBLOBSIZE 80 /* protected key blob size is always 80 bytes */
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#define MAXPROTKEYSIZE 64 /* a protected key blob may be up to 64 bytes */
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#define MAXCLRKEYSIZE 32 /* a clear key value may be up to 32 bytes */
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#define MAXAESCIPHERKEYSIZE 136 /* our aes cipher keys have always 136 bytes */
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#define MINEP11AESKEYBLOBSIZE 256 /* min EP11 AES key blob size */
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#define MAXEP11AESKEYBLOBSIZE 336 /* max EP11 AES key blob size */
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/* Minimum size of a key blob */
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#define MINKEYBLOBSIZE SECKEYBLOBSIZE
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/* defines for the type field within the pkey_protkey struct */
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#define PKEY_KEYTYPE_AES_128 1
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#define PKEY_KEYTYPE_AES_192 2
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#define PKEY_KEYTYPE_AES_256 3
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#define PKEY_KEYTYPE_ECC 4
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/* the newer ioctls use a pkey_key_type enum for type information */
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enum pkey_key_type {
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PKEY_TYPE_CCA_DATA = (__u32) 1,
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PKEY_TYPE_CCA_CIPHER = (__u32) 2,
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PKEY_TYPE_EP11 = (__u32) 3,
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PKEY_TYPE_CCA_ECC = (__u32) 0x1f,
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PKEY_TYPE_EP11_AES = (__u32) 6,
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PKEY_TYPE_EP11_ECC = (__u32) 7,
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};
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/* the newer ioctls use a pkey_key_size enum for key size information */
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enum pkey_key_size {
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PKEY_SIZE_AES_128 = (__u32) 128,
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PKEY_SIZE_AES_192 = (__u32) 192,
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PKEY_SIZE_AES_256 = (__u32) 256,
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PKEY_SIZE_UNKNOWN = (__u32) 0xFFFFFFFF,
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};
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/* some of the newer ioctls use these flags */
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#define PKEY_FLAGS_MATCH_CUR_MKVP 0x00000002
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#define PKEY_FLAGS_MATCH_ALT_MKVP 0x00000004
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/* keygenflags defines for CCA AES cipher keys */
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#define PKEY_KEYGEN_XPRT_SYM 0x00008000
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#define PKEY_KEYGEN_XPRT_UASY 0x00004000
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#define PKEY_KEYGEN_XPRT_AASY 0x00002000
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#define PKEY_KEYGEN_XPRT_RAW 0x00001000
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#define PKEY_KEYGEN_XPRT_CPAC 0x00000800
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#define PKEY_KEYGEN_XPRT_DES 0x00000080
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#define PKEY_KEYGEN_XPRT_AES 0x00000040
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#define PKEY_KEYGEN_XPRT_RSA 0x00000008
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/* Struct to hold apqn target info (card/domain pair) */
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struct pkey_apqn {
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__u16 card;
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__u16 domain;
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};
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/* Struct to hold a CCA AES secure key blob */
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struct pkey_seckey {
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__u8 seckey[SECKEYBLOBSIZE]; /* the secure key blob */
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};
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/* Struct to hold protected key and length info */
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struct pkey_protkey {
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__u32 type; /* key type, one of the PKEY_KEYTYPE_AES values */
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__u32 len; /* bytes actually stored in protkey[] */
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__u8 protkey[MAXPROTKEYSIZE]; /* the protected key blob */
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};
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/* Struct to hold an AES clear key value */
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struct pkey_clrkey {
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__u8 clrkey[MAXCLRKEYSIZE]; /* 16, 24, or 32 byte clear key value */
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};
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/*
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* EP11 key blobs of type PKEY_TYPE_EP11_AES and PKEY_TYPE_EP11_ECC
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* are ep11 blobs prepended by this header:
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*/
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struct ep11kblob_header {
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__u8 type; /* always 0x00 */
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__u8 hver; /* header version, currently needs to be 0x00 */
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__u16 len; /* total length in bytes (including this header) */
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__u8 version; /* PKEY_TYPE_EP11_AES or PKEY_TYPE_EP11_ECC */
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__u8 res0; /* unused */
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__u16 bitlen; /* clear key bit len, 0 for unknown */
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__u8 res1[8]; /* unused */
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} __packed;
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/*
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* Generate CCA AES secure key.
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*/
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struct pkey_genseck {
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__u16 cardnr; /* in: card to use or FFFF for any */
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__u16 domain; /* in: domain or FFFF for any */
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__u32 keytype; /* in: key type to generate */
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struct pkey_seckey seckey; /* out: the secure key blob */
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};
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#define PKEY_GENSECK _IOWR(PKEY_IOCTL_MAGIC, 0x01, struct pkey_genseck)
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/*
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* Construct CCA AES secure key from clear key value
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*/
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struct pkey_clr2seck {
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__u16 cardnr; /* in: card to use or FFFF for any */
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__u16 domain; /* in: domain or FFFF for any */
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__u32 keytype; /* in: key type to generate */
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struct pkey_clrkey clrkey; /* in: the clear key value */
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struct pkey_seckey seckey; /* out: the secure key blob */
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};
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#define PKEY_CLR2SECK _IOWR(PKEY_IOCTL_MAGIC, 0x02, struct pkey_clr2seck)
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/*
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* Fabricate AES protected key from a CCA AES secure key
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*/
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struct pkey_sec2protk {
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__u16 cardnr; /* in: card to use or FFFF for any */
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__u16 domain; /* in: domain or FFFF for any */
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struct pkey_seckey seckey; /* in: the secure key blob */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_SEC2PROTK _IOWR(PKEY_IOCTL_MAGIC, 0x03, struct pkey_sec2protk)
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/*
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* Fabricate AES protected key from clear key value
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*/
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struct pkey_clr2protk {
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__u32 keytype; /* in: key type to generate */
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struct pkey_clrkey clrkey; /* in: the clear key value */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_CLR2PROTK _IOWR(PKEY_IOCTL_MAGIC, 0x04, struct pkey_clr2protk)
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/*
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* Search for matching crypto card based on the Master Key
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* Verification Pattern provided inside a CCA AES secure key.
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*/
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struct pkey_findcard {
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struct pkey_seckey seckey; /* in: the secure key blob */
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__u16 cardnr; /* out: card number */
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__u16 domain; /* out: domain number */
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};
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#define PKEY_FINDCARD _IOWR(PKEY_IOCTL_MAGIC, 0x05, struct pkey_findcard)
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/*
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* Combined together: findcard + sec2prot
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*/
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struct pkey_skey2pkey {
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struct pkey_seckey seckey; /* in: the secure key blob */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_SKEY2PKEY _IOWR(PKEY_IOCTL_MAGIC, 0x06, struct pkey_skey2pkey)
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/*
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* Verify the given CCA AES secure key for being able to be usable with
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* the pkey module. Check for correct key type and check for having at
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* least one crypto card being able to handle this key (master key
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* or old master key verification pattern matches).
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* Return some info about the key: keysize in bits, keytype (currently
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* only AES), flag if key is wrapped with an old MKVP.
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*/
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struct pkey_verifykey {
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struct pkey_seckey seckey; /* in: the secure key blob */
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__u16 cardnr; /* out: card number */
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__u16 domain; /* out: domain number */
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__u16 keysize; /* out: key size in bits */
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__u32 attributes; /* out: attribute bits */
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};
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#define PKEY_VERIFYKEY _IOWR(PKEY_IOCTL_MAGIC, 0x07, struct pkey_verifykey)
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#define PKEY_VERIFY_ATTR_AES 0x00000001 /* key is an AES key */
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#define PKEY_VERIFY_ATTR_OLD_MKVP 0x00000100 /* key has old MKVP value */
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/*
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* Generate AES random protected key.
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*/
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struct pkey_genprotk {
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__u32 keytype; /* in: key type to generate */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_GENPROTK _IOWR(PKEY_IOCTL_MAGIC, 0x08, struct pkey_genprotk)
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/*
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* Verify an AES protected key.
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*/
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struct pkey_verifyprotk {
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struct pkey_protkey protkey; /* in: the protected key to verify */
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};
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#define PKEY_VERIFYPROTK _IOW(PKEY_IOCTL_MAGIC, 0x09, struct pkey_verifyprotk)
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/*
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* Transform an key blob (of any type) into a protected key
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*/
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struct pkey_kblob2pkey {
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__u8 __user *key; /* in: the key blob */
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__u32 keylen; /* in: the key blob length */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_KBLOB2PROTK _IOWR(PKEY_IOCTL_MAGIC, 0x0A, struct pkey_kblob2pkey)
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/*
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* Generate secure key, version 2.
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* Generate CCA AES secure key, CCA AES cipher key or EP11 AES secure key.
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* There needs to be a list of apqns given with at least one entry in there.
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* All apqns in the list need to be exact apqns, 0xFFFF as ANY card or domain
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* is not supported. The implementation walks through the list of apqns and
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* tries to send the request to each apqn without any further checking (like
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* card type or online state). If the apqn fails, simple the next one in the
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* list is tried until success (return 0) or the end of the list is reached
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* (return -1 with errno ENODEV). You may use the PKEY_APQNS4KT ioctl to
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* generate a list of apqns based on the key type to generate.
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* The keygenflags argument is passed to the low level generation functions
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* individual for the key type and has a key type specific meaning. When
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* generating CCA cipher keys you can use one or more of the PKEY_KEYGEN_*
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* flags to widen the export possibilities. By default a cipher key is
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* only exportable for CPACF (PKEY_KEYGEN_XPRT_CPAC).
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* The keygenflag argument for generating an EP11 AES key should either be 0
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* to use the defaults which are XCP_BLOB_ENCRYPT, XCP_BLOB_DECRYPT and
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* XCP_BLOB_PROTKEY_EXTRACTABLE or a valid combination of XCP_BLOB_* flags.
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*/
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struct pkey_genseck2 {
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struct pkey_apqn __user *apqns; /* in: ptr to list of apqn targets*/
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__u32 apqn_entries; /* in: # of apqn target list entries */
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enum pkey_key_type type; /* in: key type to generate */
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enum pkey_key_size size; /* in: key size to generate */
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__u32 keygenflags; /* in: key generation flags */
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__u8 __user *key; /* in: pointer to key blob buffer */
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__u32 keylen; /* in: available key blob buffer size */
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/* out: actual key blob size */
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};
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#define PKEY_GENSECK2 _IOWR(PKEY_IOCTL_MAGIC, 0x11, struct pkey_genseck2)
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/*
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* Generate secure key from clear key value, version 2.
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* Construct an CCA AES secure key, CCA AES cipher key or EP11 AES secure
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* key from a given clear key value.
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* There needs to be a list of apqns given with at least one entry in there.
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* All apqns in the list need to be exact apqns, 0xFFFF as ANY card or domain
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* is not supported. The implementation walks through the list of apqns and
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* tries to send the request to each apqn without any further checking (like
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* card type or online state). If the apqn fails, simple the next one in the
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* list is tried until success (return 0) or the end of the list is reached
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* (return -1 with errno ENODEV). You may use the PKEY_APQNS4KT ioctl to
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* generate a list of apqns based on the key type to generate.
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* The keygenflags argument is passed to the low level generation functions
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* individual for the key type and has a key type specific meaning. When
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* generating CCA cipher keys you can use one or more of the PKEY_KEYGEN_*
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* flags to widen the export possibilities. By default a cipher key is
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* only exportable for CPACF (PKEY_KEYGEN_XPRT_CPAC).
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* The keygenflag argument for generating an EP11 AES key should either be 0
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* to use the defaults which are XCP_BLOB_ENCRYPT, XCP_BLOB_DECRYPT and
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* XCP_BLOB_PROTKEY_EXTRACTABLE or a valid combination of XCP_BLOB_* flags.
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*/
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struct pkey_clr2seck2 {
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struct pkey_apqn __user *apqns; /* in: ptr to list of apqn targets */
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__u32 apqn_entries; /* in: # of apqn target list entries */
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enum pkey_key_type type; /* in: key type to generate */
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enum pkey_key_size size; /* in: key size to generate */
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__u32 keygenflags; /* in: key generation flags */
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struct pkey_clrkey clrkey; /* in: the clear key value */
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__u8 __user *key; /* in: pointer to key blob buffer */
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__u32 keylen; /* in: available key blob buffer size */
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/* out: actual key blob size */
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};
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#define PKEY_CLR2SECK2 _IOWR(PKEY_IOCTL_MAGIC, 0x12, struct pkey_clr2seck2)
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/*
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* Verify the given secure key, version 2.
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* Check for correct key type. If cardnr and domain are given (are not
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* 0xFFFF) also check if this apqn is able to handle this type of key.
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* If cardnr and/or domain is 0xFFFF, on return these values are filled
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* with one apqn able to handle this key.
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* The function also checks for the master key verification patterns
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* of the key matching to the current or alternate mkvp of the apqn.
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* For CCA AES secure keys and CCA AES cipher keys this means to check
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* the key's mkvp against the current or old mkvp of the apqns. The flags
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* field is updated with some additional info about the apqn mkvp
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* match: If the current mkvp matches to the key's mkvp then the
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* PKEY_FLAGS_MATCH_CUR_MKVP bit is set, if the alternate mkvp matches to
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* the key's mkvp the PKEY_FLAGS_MATCH_ALT_MKVP is set. For CCA keys the
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* alternate mkvp is the old master key verification pattern.
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* CCA AES secure keys are also checked to have the CPACF export allowed
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* bit enabled (XPRTCPAC) in the kmf1 field.
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* EP11 keys are also supported and the wkvp of the key is checked against
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* the current wkvp of the apqns. There is no alternate for this type of
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* key and so on a match the flag PKEY_FLAGS_MATCH_CUR_MKVP always is set.
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* EP11 keys are also checked to have XCP_BLOB_PROTKEY_EXTRACTABLE set.
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* The ioctl returns 0 as long as the given or found apqn matches to
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* matches with the current or alternate mkvp to the key's mkvp. If the given
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* apqn does not match or there is no such apqn found, -1 with errno
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* ENODEV is returned.
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*/
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struct pkey_verifykey2 {
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__u8 __user *key; /* in: pointer to key blob */
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__u32 keylen; /* in: key blob size */
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__u16 cardnr; /* in/out: card number */
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__u16 domain; /* in/out: domain number */
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enum pkey_key_type type; /* out: the key type */
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enum pkey_key_size size; /* out: the key size */
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__u32 flags; /* out: additional key info flags */
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};
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#define PKEY_VERIFYKEY2 _IOWR(PKEY_IOCTL_MAGIC, 0x17, struct pkey_verifykey2)
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/*
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* Transform a key blob into a protected key, version 2.
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* There needs to be a list of apqns given with at least one entry in there.
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* All apqns in the list need to be exact apqns, 0xFFFF as ANY card or domain
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* is not supported. The implementation walks through the list of apqns and
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* tries to send the request to each apqn without any further checking (like
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* card type or online state). If the apqn fails, simple the next one in the
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* list is tried until success (return 0) or the end of the list is reached
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* (return -1 with errno ENODEV). You may use the PKEY_APQNS4K ioctl to
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* generate a list of apqns based on the key.
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* Deriving ECC protected keys from ECC secure keys is not supported with
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* this ioctl, use PKEY_KBLOB2PROTK3 for this purpose.
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*/
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struct pkey_kblob2pkey2 {
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__u8 __user *key; /* in: pointer to key blob */
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__u32 keylen; /* in: key blob size */
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struct pkey_apqn __user *apqns; /* in: ptr to list of apqn targets */
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__u32 apqn_entries; /* in: # of apqn target list entries */
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struct pkey_protkey protkey; /* out: the protected key */
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};
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#define PKEY_KBLOB2PROTK2 _IOWR(PKEY_IOCTL_MAGIC, 0x1A, struct pkey_kblob2pkey2)
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/*
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* Build a list of APQNs based on a key blob given.
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* Is able to find out which type of secure key is given (CCA AES secure
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* key, CCA AES cipher key, CCA ECC private key, EP11 AES key, EP11 ECC private
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* key) and tries to find all matching crypto cards based on the MKVP and maybe
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* other criterias (like CCA AES cipher keys need a CEX5C or higher, EP11 keys
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* with BLOB_PKEY_EXTRACTABLE need a CEX7 and EP11 api version 4). The list of
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* APQNs is further filtered by the key's mkvp which needs to match to either
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* the current mkvp (CCA and EP11) or the alternate mkvp (old mkvp, CCA adapters
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* only) of the apqns. The flags argument may be used to limit the matching
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* apqns. If the PKEY_FLAGS_MATCH_CUR_MKVP is given, only the current mkvp of
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* each apqn is compared. Likewise with the PKEY_FLAGS_MATCH_ALT_MKVP. If both
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* are given, it is assumed to return apqns where either the current or the
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* alternate mkvp matches. At least one of the matching flags needs to be given.
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* The flags argument for EP11 keys has no further action and is currently
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* ignored (but needs to be given as PKEY_FLAGS_MATCH_CUR_MKVP) as there is only
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* the wkvp from the key to match against the apqn's wkvp.
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* The list of matching apqns is stored into the space given by the apqns
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* argument and the number of stored entries goes into apqn_entries. If the list
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* is empty (apqn_entries is 0) the apqn_entries field is updated to the number
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* of apqn targets found and the ioctl returns with 0. If apqn_entries is > 0
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* but the number of apqn targets does not fit into the list, the apqn_targets
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* field is updatedd with the number of reqired entries but there are no apqn
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* values stored in the list and the ioctl returns with ENOSPC. If no matching
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* APQN is found, the ioctl returns with 0 but the apqn_entries value is 0.
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*/
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struct pkey_apqns4key {
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__u8 __user *key; /* in: pointer to key blob */
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__u32 keylen; /* in: key blob size */
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__u32 flags; /* in: match controlling flags */
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struct pkey_apqn __user *apqns; /* in/out: ptr to list of apqn targets*/
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__u32 apqn_entries; /* in: max # of apqn entries in the list */
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/* out: # apqns stored into the list */
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};
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#define PKEY_APQNS4K _IOWR(PKEY_IOCTL_MAGIC, 0x1B, struct pkey_apqns4key)
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/*
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* Build a list of APQNs based on a key type given.
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* Build a list of APQNs based on a given key type and maybe further
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* restrict the list by given master key verification patterns.
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* For different key types there may be different ways to match the
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* master key verification patterns. For CCA keys (CCA data key and CCA
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* cipher key) the first 8 bytes of cur_mkvp refer to the current AES mkvp value
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* of the apqn and the first 8 bytes of the alt_mkvp refer to the old AES mkvp.
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* For CCA ECC keys it is similar but the match is against the APKA current/old
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* mkvp. The flags argument controls if the apqns current and/or alternate mkvp
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* should match. If the PKEY_FLAGS_MATCH_CUR_MKVP is given, only the current
|
|
* mkvp of each apqn is compared. Likewise with the PKEY_FLAGS_MATCH_ALT_MKVP.
|
|
* If both are given, it is assumed to return apqns where either the
|
|
* current or the alternate mkvp matches. If no match flag is given
|
|
* (flags is 0) the mkvp values are ignored for the match process.
|
|
* For EP11 keys there is only the current wkvp. So if the apqns should also
|
|
* match to a given wkvp, then the PKEY_FLAGS_MATCH_CUR_MKVP flag should be
|
|
* set. The wkvp value is 32 bytes but only the leftmost 16 bytes are compared
|
|
* against the leftmost 16 byte of the wkvp of the apqn.
|
|
* The list of matching apqns is stored into the space given by the apqns
|
|
* argument and the number of stored entries goes into apqn_entries. If the list
|
|
* is empty (apqn_entries is 0) the apqn_entries field is updated to the number
|
|
* of apqn targets found and the ioctl returns with 0. If apqn_entries is > 0
|
|
* but the number of apqn targets does not fit into the list, the apqn_targets
|
|
* field is updatedd with the number of reqired entries but there are no apqn
|
|
* values stored in the list and the ioctl returns with ENOSPC. If no matching
|
|
* APQN is found, the ioctl returns with 0 but the apqn_entries value is 0.
|
|
*/
|
|
struct pkey_apqns4keytype {
|
|
enum pkey_key_type type; /* in: key type */
|
|
__u8 cur_mkvp[32]; /* in: current mkvp */
|
|
__u8 alt_mkvp[32]; /* in: alternate mkvp */
|
|
__u32 flags; /* in: match controlling flags */
|
|
struct pkey_apqn __user *apqns; /* in/out: ptr to list of apqn targets*/
|
|
__u32 apqn_entries; /* in: max # of apqn entries in the list */
|
|
/* out: # apqns stored into the list */
|
|
};
|
|
#define PKEY_APQNS4KT _IOWR(PKEY_IOCTL_MAGIC, 0x1C, struct pkey_apqns4keytype)
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|
|
|
/*
|
|
* Transform a key blob into a protected key, version 3.
|
|
* The difference to version 2 of this ioctl is that the protected key
|
|
* buffer is now explicitly and not within a struct pkey_protkey any more.
|
|
* So this ioctl is also able to handle EP11 and CCA ECC secure keys and
|
|
* provide ECC protected keys.
|
|
* There needs to be a list of apqns given with at least one entry in there.
|
|
* All apqns in the list need to be exact apqns, 0xFFFF as ANY card or domain
|
|
* is not supported. The implementation walks through the list of apqns and
|
|
* tries to send the request to each apqn without any further checking (like
|
|
* card type or online state). If the apqn fails, simple the next one in the
|
|
* list is tried until success (return 0) or the end of the list is reached
|
|
* (return -1 with errno ENODEV). You may use the PKEY_APQNS4K ioctl to
|
|
* generate a list of apqns based on the key.
|
|
*/
|
|
struct pkey_kblob2pkey3 {
|
|
__u8 __user *key; /* in: pointer to key blob */
|
|
__u32 keylen; /* in: key blob size */
|
|
struct pkey_apqn __user *apqns; /* in: ptr to list of apqn targets */
|
|
__u32 apqn_entries; /* in: # of apqn target list entries */
|
|
__u32 pkeytype; /* out: prot key type (enum pkey_key_type) */
|
|
__u32 pkeylen; /* in/out: size of pkey buffer/actual len of pkey */
|
|
__u8 __user *pkey; /* in: pkey blob buffer space ptr */
|
|
};
|
|
#define PKEY_KBLOB2PROTK3 _IOWR(PKEY_IOCTL_MAGIC, 0x1D, struct pkey_kblob2pkey3)
|
|
|
|
#endif /* _UAPI_PKEY_H */
|