linux/arch/s390/crypto/crypt_s390.h
Heiko Carstens a53c8fab3f s390/comments: unify copyright messages and remove file names
Remove the file name from the comment at top of many files. In most
cases the file name was wrong anyway, so it's rather pointless.

Also unify the IBM copyright statement. We did have a lot of sightly
different statements and wanted to change them one after another
whenever a file gets touched. However that never happened. Instead
people start to take the old/"wrong" statements to use as a template
for new files.
So unify all of them in one go.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-07-20 11:15:04 +02:00

438 lines
14 KiB
C

/*
* Cryptographic API.
*
* Support for s390 cryptographic instructions.
*
* Copyright IBM Corp. 2003, 2007
* Author(s): Thomas Spatzier
* Jan Glauber (jan.glauber@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 of the License, or (at your option)
* any later version.
*
*/
#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
#define _CRYPTO_ARCH_S390_CRYPT_S390_H
#include <asm/errno.h>
#include <asm/facility.h>
#define CRYPT_S390_OP_MASK 0xFF00
#define CRYPT_S390_FUNC_MASK 0x00FF
#define CRYPT_S390_PRIORITY 300
#define CRYPT_S390_COMPOSITE_PRIORITY 400
#define CRYPT_S390_MSA 0x1
#define CRYPT_S390_MSA3 0x2
#define CRYPT_S390_MSA4 0x4
/* s390 cryptographic operations */
enum crypt_s390_operations {
CRYPT_S390_KM = 0x0100,
CRYPT_S390_KMC = 0x0200,
CRYPT_S390_KIMD = 0x0300,
CRYPT_S390_KLMD = 0x0400,
CRYPT_S390_KMAC = 0x0500,
CRYPT_S390_KMCTR = 0x0600
};
/*
* function codes for KM (CIPHER MESSAGE) instruction
* 0x80 is the decipher modifier bit
*/
enum crypt_s390_km_func {
KM_QUERY = CRYPT_S390_KM | 0x0,
KM_DEA_ENCRYPT = CRYPT_S390_KM | 0x1,
KM_DEA_DECRYPT = CRYPT_S390_KM | 0x1 | 0x80,
KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
KM_AES_128_ENCRYPT = CRYPT_S390_KM | 0x12,
KM_AES_128_DECRYPT = CRYPT_S390_KM | 0x12 | 0x80,
KM_AES_192_ENCRYPT = CRYPT_S390_KM | 0x13,
KM_AES_192_DECRYPT = CRYPT_S390_KM | 0x13 | 0x80,
KM_AES_256_ENCRYPT = CRYPT_S390_KM | 0x14,
KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80,
KM_XTS_128_ENCRYPT = CRYPT_S390_KM | 0x32,
KM_XTS_128_DECRYPT = CRYPT_S390_KM | 0x32 | 0x80,
KM_XTS_256_ENCRYPT = CRYPT_S390_KM | 0x34,
KM_XTS_256_DECRYPT = CRYPT_S390_KM | 0x34 | 0x80,
};
/*
* function codes for KMC (CIPHER MESSAGE WITH CHAINING)
* instruction
*/
enum crypt_s390_kmc_func {
KMC_QUERY = CRYPT_S390_KMC | 0x0,
KMC_DEA_ENCRYPT = CRYPT_S390_KMC | 0x1,
KMC_DEA_DECRYPT = CRYPT_S390_KMC | 0x1 | 0x80,
KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
KMC_AES_128_ENCRYPT = CRYPT_S390_KMC | 0x12,
KMC_AES_128_DECRYPT = CRYPT_S390_KMC | 0x12 | 0x80,
KMC_AES_192_ENCRYPT = CRYPT_S390_KMC | 0x13,
KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80,
KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14,
KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80,
KMC_PRNG = CRYPT_S390_KMC | 0x43,
};
/*
* function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
* instruction
*/
enum crypt_s390_kmctr_func {
KMCTR_QUERY = CRYPT_S390_KMCTR | 0x0,
KMCTR_DEA_ENCRYPT = CRYPT_S390_KMCTR | 0x1,
KMCTR_DEA_DECRYPT = CRYPT_S390_KMCTR | 0x1 | 0x80,
KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR | 0x2,
KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR | 0x2 | 0x80,
KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR | 0x3,
KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR | 0x3 | 0x80,
KMCTR_AES_128_ENCRYPT = CRYPT_S390_KMCTR | 0x12,
KMCTR_AES_128_DECRYPT = CRYPT_S390_KMCTR | 0x12 | 0x80,
KMCTR_AES_192_ENCRYPT = CRYPT_S390_KMCTR | 0x13,
KMCTR_AES_192_DECRYPT = CRYPT_S390_KMCTR | 0x13 | 0x80,
KMCTR_AES_256_ENCRYPT = CRYPT_S390_KMCTR | 0x14,
KMCTR_AES_256_DECRYPT = CRYPT_S390_KMCTR | 0x14 | 0x80,
};
/*
* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
* instruction
*/
enum crypt_s390_kimd_func {
KIMD_QUERY = CRYPT_S390_KIMD | 0,
KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
KIMD_GHASH = CRYPT_S390_KIMD | 65,
};
/*
* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
* instruction
*/
enum crypt_s390_klmd_func {
KLMD_QUERY = CRYPT_S390_KLMD | 0,
KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
};
/*
* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
* instruction
*/
enum crypt_s390_kmac_func {
KMAC_QUERY = CRYPT_S390_KMAC | 0,
KMAC_DEA = CRYPT_S390_KMAC | 1,
KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
};
/**
* crypt_s390_km:
* @func: the function code passed to KM; see crypt_s390_km_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KM (CIPHER MESSAGE) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_km(long func, void *param,
u8 *dest, const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
int ret;
asm volatile(
"0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmc:
* @func: the function code passed to KM; see crypt_s390_kmc_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_kmc(long func, void *param,
u8 *dest, const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
int ret;
asm volatile(
"0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kimd:
* @func: the function code passed to KM; see crypt_s390_kimd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
* of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_kimd(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_klmd:
* @func: the function code passed to KM; see crypt_s390_klmd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_klmd(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmac:
* @func: the function code passed to KM; see crypt_s390_klmd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
* of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_kmac(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmctr:
* @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
* @counter: address of counter value
*
* Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
const u8 *src, long src_len, u8 *counter)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
register u8 *__ctr asm("6") = counter;
int ret = -1;
asm volatile(
"0: .insn rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
"+a" (__ctr)
: "d" (__func), "a" (__param) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_func_available:
* @func: the function code of the specific function; 0 if op in general
*
* Tests if a specific crypto function is implemented on the machine.
*
* Returns 1 if func available; 0 if func or op in general not available
*/
static inline int crypt_s390_func_available(int func,
unsigned int facility_mask)
{
unsigned char status[16];
int ret;
if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
return 0;
if (facility_mask & CRYPT_S390_MSA3 &&
(!test_facility(2) || !test_facility(76)))
return 0;
if (facility_mask & CRYPT_S390_MSA4 &&
(!test_facility(2) || !test_facility(77)))
return 0;
switch (func & CRYPT_S390_OP_MASK) {
case CRYPT_S390_KM:
ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
break;
case CRYPT_S390_KMC:
ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
break;
case CRYPT_S390_KIMD:
ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KLMD:
ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KMAC:
ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KMCTR:
ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
NULL);
break;
default:
return 0;
}
if (ret < 0)
return 0;
func &= CRYPT_S390_FUNC_MASK;
func &= 0x7f; /* mask modifier bit */
return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
}
/**
* crypt_s390_pcc:
* @func: the function code passed to KM; see crypt_s390_km_func
* @param: address of parameter block; see POP for details on each func
*
* Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
*
* Returns -1 for failure, 0 for success.
*/
static inline int crypt_s390_pcc(long func, void *param)
{
register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
register void *__param asm("1") = param;
int ret = -1;
asm volatile(
"0: .insn rre,0xb92c0000,0,0 \n" /* PCC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "+d" (ret)
: "d" (__func), "a" (__param) : "cc", "memory");
return ret;
}
#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */