351 lines
11 KiB
C
351 lines
11 KiB
C
/*
|
|
* linux/drivers/s390/crypto/zcrypt_cca_key.h
|
|
*
|
|
* zcrypt 2.1.0
|
|
*
|
|
* Copyright (C) 2001, 2006 IBM Corporation
|
|
* Author(s): Robert Burroughs
|
|
* Eric Rossman (edrossma@us.ibm.com)
|
|
*
|
|
* Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
|
|
* Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef _ZCRYPT_CCA_KEY_H_
|
|
#define _ZCRYPT_CCA_KEY_H_
|
|
|
|
struct T6_keyBlock_hdr {
|
|
unsigned short blen;
|
|
unsigned short ulen;
|
|
unsigned short flags;
|
|
};
|
|
|
|
/**
|
|
* mapping for the cca private ME key token.
|
|
* Three parts of interest here: the header, the private section and
|
|
* the public section.
|
|
*
|
|
* mapping for the cca key token header
|
|
*/
|
|
struct cca_token_hdr {
|
|
unsigned char token_identifier;
|
|
unsigned char version;
|
|
unsigned short token_length;
|
|
unsigned char reserved[4];
|
|
} __attribute__((packed));
|
|
|
|
#define CCA_TKN_HDR_ID_EXT 0x1E
|
|
|
|
/**
|
|
* mapping for the cca private ME section
|
|
*/
|
|
struct cca_private_ext_ME_sec {
|
|
unsigned char section_identifier;
|
|
unsigned char version;
|
|
unsigned short section_length;
|
|
unsigned char private_key_hash[20];
|
|
unsigned char reserved1[4];
|
|
unsigned char key_format;
|
|
unsigned char reserved2;
|
|
unsigned char key_name_hash[20];
|
|
unsigned char key_use_flags[4];
|
|
unsigned char reserved3[6];
|
|
unsigned char reserved4[24];
|
|
unsigned char confounder[24];
|
|
unsigned char exponent[128];
|
|
unsigned char modulus[128];
|
|
} __attribute__((packed));
|
|
|
|
#define CCA_PVT_USAGE_ALL 0x80
|
|
|
|
/**
|
|
* mapping for the cca public section
|
|
* In a private key, the modulus doesn't appear in the public
|
|
* section. So, an arbitrary public exponent of 0x010001 will be
|
|
* used, for a section length of 0x0F always.
|
|
*/
|
|
struct cca_public_sec {
|
|
unsigned char section_identifier;
|
|
unsigned char version;
|
|
unsigned short section_length;
|
|
unsigned char reserved[2];
|
|
unsigned short exponent_len;
|
|
unsigned short modulus_bit_len;
|
|
unsigned short modulus_byte_len; /* In a private key, this is 0 */
|
|
} __attribute__((packed));
|
|
|
|
/**
|
|
* mapping for the cca private CRT key 'token'
|
|
* The first three parts (the only parts considered in this release)
|
|
* are: the header, the private section and the public section.
|
|
* The header and public section are the same as for the
|
|
* struct cca_private_ext_ME
|
|
*
|
|
* Following the structure are the quantities p, q, dp, dq, u, pad,
|
|
* and modulus, in that order, where pad_len is the modulo 8
|
|
* complement of the residue modulo 8 of the sum of
|
|
* (p_len + q_len + dp_len + dq_len + u_len).
|
|
*/
|
|
struct cca_pvt_ext_CRT_sec {
|
|
unsigned char section_identifier;
|
|
unsigned char version;
|
|
unsigned short section_length;
|
|
unsigned char private_key_hash[20];
|
|
unsigned char reserved1[4];
|
|
unsigned char key_format;
|
|
unsigned char reserved2;
|
|
unsigned char key_name_hash[20];
|
|
unsigned char key_use_flags[4];
|
|
unsigned short p_len;
|
|
unsigned short q_len;
|
|
unsigned short dp_len;
|
|
unsigned short dq_len;
|
|
unsigned short u_len;
|
|
unsigned short mod_len;
|
|
unsigned char reserved3[4];
|
|
unsigned short pad_len;
|
|
unsigned char reserved4[52];
|
|
unsigned char confounder[8];
|
|
} __attribute__((packed));
|
|
|
|
#define CCA_PVT_EXT_CRT_SEC_ID_PVT 0x08
|
|
#define CCA_PVT_EXT_CRT_SEC_FMT_CL 0x40
|
|
|
|
/**
|
|
* Set up private key fields of a type6 MEX message.
|
|
* Note that all numerics in the key token are big-endian,
|
|
* while the entries in the key block header are little-endian.
|
|
*
|
|
* @mex: pointer to user input data
|
|
* @p: pointer to memory area for the key
|
|
*
|
|
* Returns the size of the key area or -EFAULT
|
|
*/
|
|
static inline int zcrypt_type6_mex_key_de(struct ica_rsa_modexpo *mex,
|
|
void *p, int big_endian)
|
|
{
|
|
static struct cca_token_hdr static_pvt_me_hdr = {
|
|
.token_identifier = 0x1E,
|
|
.token_length = 0x0183,
|
|
};
|
|
static struct cca_private_ext_ME_sec static_pvt_me_sec = {
|
|
.section_identifier = 0x02,
|
|
.section_length = 0x016C,
|
|
.key_use_flags = {0x80,0x00,0x00,0x00},
|
|
};
|
|
static struct cca_public_sec static_pub_me_sec = {
|
|
.section_identifier = 0x04,
|
|
.section_length = 0x000F,
|
|
.exponent_len = 0x0003,
|
|
};
|
|
static char pk_exponent[3] = { 0x01, 0x00, 0x01 };
|
|
struct {
|
|
struct T6_keyBlock_hdr t6_hdr;
|
|
struct cca_token_hdr pvtMeHdr;
|
|
struct cca_private_ext_ME_sec pvtMeSec;
|
|
struct cca_public_sec pubMeSec;
|
|
char exponent[3];
|
|
} __attribute__((packed)) *key = p;
|
|
unsigned char *temp;
|
|
|
|
memset(key, 0, sizeof(*key));
|
|
|
|
if (big_endian) {
|
|
key->t6_hdr.blen = cpu_to_be16(0x189);
|
|
key->t6_hdr.ulen = cpu_to_be16(0x189 - 2);
|
|
} else {
|
|
key->t6_hdr.blen = cpu_to_le16(0x189);
|
|
key->t6_hdr.ulen = cpu_to_le16(0x189 - 2);
|
|
}
|
|
key->pvtMeHdr = static_pvt_me_hdr;
|
|
key->pvtMeSec = static_pvt_me_sec;
|
|
key->pubMeSec = static_pub_me_sec;
|
|
/*
|
|
* In a private key, the modulus doesn't appear in the public
|
|
* section. So, an arbitrary public exponent of 0x010001 will be
|
|
* used.
|
|
*/
|
|
memcpy(key->exponent, pk_exponent, 3);
|
|
|
|
/* key parameter block */
|
|
temp = key->pvtMeSec.exponent +
|
|
sizeof(key->pvtMeSec.exponent) - mex->inputdatalength;
|
|
if (copy_from_user(temp, mex->b_key, mex->inputdatalength))
|
|
return -EFAULT;
|
|
|
|
/* modulus */
|
|
temp = key->pvtMeSec.modulus +
|
|
sizeof(key->pvtMeSec.modulus) - mex->inputdatalength;
|
|
if (copy_from_user(temp, mex->n_modulus, mex->inputdatalength))
|
|
return -EFAULT;
|
|
key->pubMeSec.modulus_bit_len = 8 * mex->inputdatalength;
|
|
return sizeof(*key);
|
|
}
|
|
|
|
/**
|
|
* Set up private key fields of a type6 MEX message. The _pad variant
|
|
* strips leading zeroes from the b_key.
|
|
* Note that all numerics in the key token are big-endian,
|
|
* while the entries in the key block header are little-endian.
|
|
*
|
|
* @mex: pointer to user input data
|
|
* @p: pointer to memory area for the key
|
|
*
|
|
* Returns the size of the key area or -EFAULT
|
|
*/
|
|
static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex,
|
|
void *p, int big_endian)
|
|
{
|
|
static struct cca_token_hdr static_pub_hdr = {
|
|
.token_identifier = 0x1E,
|
|
};
|
|
static struct cca_public_sec static_pub_sec = {
|
|
.section_identifier = 0x04,
|
|
};
|
|
struct {
|
|
struct T6_keyBlock_hdr t6_hdr;
|
|
struct cca_token_hdr pubHdr;
|
|
struct cca_public_sec pubSec;
|
|
char exponent[0];
|
|
} __attribute__((packed)) *key = p;
|
|
unsigned char *temp;
|
|
int i;
|
|
|
|
memset(key, 0, sizeof(*key));
|
|
|
|
key->pubHdr = static_pub_hdr;
|
|
key->pubSec = static_pub_sec;
|
|
|
|
/* key parameter block */
|
|
temp = key->exponent;
|
|
if (copy_from_user(temp, mex->b_key, mex->inputdatalength))
|
|
return -EFAULT;
|
|
/* Strip leading zeroes from b_key. */
|
|
for (i = 0; i < mex->inputdatalength; i++)
|
|
if (temp[i])
|
|
break;
|
|
if (i >= mex->inputdatalength)
|
|
return -EINVAL;
|
|
memmove(temp, temp + i, mex->inputdatalength - i);
|
|
temp += mex->inputdatalength - i;
|
|
/* modulus */
|
|
if (copy_from_user(temp, mex->n_modulus, mex->inputdatalength))
|
|
return -EFAULT;
|
|
|
|
key->pubSec.modulus_bit_len = 8 * mex->inputdatalength;
|
|
key->pubSec.modulus_byte_len = mex->inputdatalength;
|
|
key->pubSec.exponent_len = mex->inputdatalength - i;
|
|
key->pubSec.section_length = sizeof(key->pubSec) +
|
|
2*mex->inputdatalength - i;
|
|
key->pubHdr.token_length =
|
|
key->pubSec.section_length + sizeof(key->pubHdr);
|
|
if (big_endian) {
|
|
key->t6_hdr.ulen = cpu_to_be16(key->pubHdr.token_length + 4);
|
|
key->t6_hdr.blen = cpu_to_be16(key->pubHdr.token_length + 6);
|
|
} else {
|
|
key->t6_hdr.ulen = cpu_to_le16(key->pubHdr.token_length + 4);
|
|
key->t6_hdr.blen = cpu_to_le16(key->pubHdr.token_length + 6);
|
|
}
|
|
return sizeof(*key) + 2*mex->inputdatalength - i;
|
|
}
|
|
|
|
/**
|
|
* Set up private key fields of a type6 CRT message.
|
|
* Note that all numerics in the key token are big-endian,
|
|
* while the entries in the key block header are little-endian.
|
|
*
|
|
* @mex: pointer to user input data
|
|
* @p: pointer to memory area for the key
|
|
*
|
|
* Returns the size of the key area or -EFAULT
|
|
*/
|
|
static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt,
|
|
void *p, int big_endian)
|
|
{
|
|
static struct cca_public_sec static_cca_pub_sec = {
|
|
.section_identifier = 4,
|
|
.section_length = 0x000f,
|
|
.exponent_len = 0x0003,
|
|
};
|
|
static char pk_exponent[3] = { 0x01, 0x00, 0x01 };
|
|
struct {
|
|
struct T6_keyBlock_hdr t6_hdr;
|
|
struct cca_token_hdr token;
|
|
struct cca_pvt_ext_CRT_sec pvt;
|
|
char key_parts[0];
|
|
} __attribute__((packed)) *key = p;
|
|
struct cca_public_sec *pub;
|
|
int short_len, long_len, pad_len, key_len, size;
|
|
|
|
memset(key, 0, sizeof(*key));
|
|
|
|
short_len = crt->inputdatalength / 2;
|
|
long_len = short_len + 8;
|
|
pad_len = -(3*long_len + 2*short_len) & 7;
|
|
key_len = 3*long_len + 2*short_len + pad_len + crt->inputdatalength;
|
|
size = sizeof(*key) + key_len + sizeof(*pub) + 3;
|
|
|
|
/* parameter block.key block */
|
|
if (big_endian) {
|
|
key->t6_hdr.blen = cpu_to_be16(size);
|
|
key->t6_hdr.ulen = cpu_to_be16(size - 2);
|
|
} else {
|
|
key->t6_hdr.blen = cpu_to_le16(size);
|
|
key->t6_hdr.ulen = cpu_to_le16(size - 2);
|
|
}
|
|
|
|
/* key token header */
|
|
key->token.token_identifier = CCA_TKN_HDR_ID_EXT;
|
|
key->token.token_length = size - 6;
|
|
|
|
/* private section */
|
|
key->pvt.section_identifier = CCA_PVT_EXT_CRT_SEC_ID_PVT;
|
|
key->pvt.section_length = sizeof(key->pvt) + key_len;
|
|
key->pvt.key_format = CCA_PVT_EXT_CRT_SEC_FMT_CL;
|
|
key->pvt.key_use_flags[0] = CCA_PVT_USAGE_ALL;
|
|
key->pvt.p_len = key->pvt.dp_len = key->pvt.u_len = long_len;
|
|
key->pvt.q_len = key->pvt.dq_len = short_len;
|
|
key->pvt.mod_len = crt->inputdatalength;
|
|
key->pvt.pad_len = pad_len;
|
|
|
|
/* key parts */
|
|
if (copy_from_user(key->key_parts, crt->np_prime, long_len) ||
|
|
copy_from_user(key->key_parts + long_len,
|
|
crt->nq_prime, short_len) ||
|
|
copy_from_user(key->key_parts + long_len + short_len,
|
|
crt->bp_key, long_len) ||
|
|
copy_from_user(key->key_parts + 2*long_len + short_len,
|
|
crt->bq_key, short_len) ||
|
|
copy_from_user(key->key_parts + 2*long_len + 2*short_len,
|
|
crt->u_mult_inv, long_len))
|
|
return -EFAULT;
|
|
memset(key->key_parts + 3*long_len + 2*short_len + pad_len,
|
|
0xff, crt->inputdatalength);
|
|
pub = (struct cca_public_sec *)(key->key_parts + key_len);
|
|
*pub = static_cca_pub_sec;
|
|
pub->modulus_bit_len = 8 * crt->inputdatalength;
|
|
/*
|
|
* In a private key, the modulus doesn't appear in the public
|
|
* section. So, an arbitrary public exponent of 0x010001 will be
|
|
* used.
|
|
*/
|
|
memcpy((char *) (pub + 1), pk_exponent, 3);
|
|
return size;
|
|
}
|
|
|
|
#endif /* _ZCRYPT_CCA_KEY_H_ */
|