398 lines
12 KiB
C
398 lines
12 KiB
C
/*
|
|
* Cryptographic API.
|
|
*
|
|
* Support for s390 cryptographic instructions.
|
|
*
|
|
* Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation
|
|
* Author(s): Thomas Spatzier (tspat@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>
|
|
|
|
#define CRYPT_S390_OP_MASK 0xFF00
|
|
#define CRYPT_S390_FUNC_MASK 0x00FF
|
|
|
|
/* s930 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
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/* 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
|
|
};
|
|
|
|
/* status word for s390 crypto instructions' QUERY functions */
|
|
struct crypt_s390_query_status {
|
|
u64 high;
|
|
u64 low;
|
|
};
|
|
|
|
/*
|
|
* Standard fixup and ex_table sections for crypt_s390 inline functions.
|
|
* label 0: the s390 crypto operation
|
|
* label 1: just after 1 to catch illegal operation exception
|
|
* (unsupported model)
|
|
* label 6: the return point after fixup
|
|
* label 7: set error value if exception _in_ crypto operation
|
|
* label 8: set error value if illegal operation exception
|
|
* [ret] is the variable to receive the error code
|
|
* [ERR] is the error code value
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
#define __crypt_s390_fixup \
|
|
".section .fixup,\"ax\" \n" \
|
|
"7: lhi %0,%h[e1] \n" \
|
|
" bras 1,9f \n" \
|
|
" .long 6b \n" \
|
|
"8: lhi %0,%h[e2] \n" \
|
|
" bras 1,9f \n" \
|
|
" .long 6b \n" \
|
|
"9: l 1,0(1) \n" \
|
|
" br 1 \n" \
|
|
".previous \n" \
|
|
".section __ex_table,\"a\" \n" \
|
|
" .align 4 \n" \
|
|
" .long 0b,7b \n" \
|
|
" .long 1b,8b \n" \
|
|
".previous"
|
|
#else /* CONFIG_64BIT */
|
|
#define __crypt_s390_fixup \
|
|
".section .fixup,\"ax\" \n" \
|
|
"7: lhi %0,%h[e1] \n" \
|
|
" jg 6b \n" \
|
|
"8: lhi %0,%h[e2] \n" \
|
|
" jg 6b \n" \
|
|
".previous\n" \
|
|
".section __ex_table,\"a\" \n" \
|
|
" .align 8 \n" \
|
|
" .quad 0b,7b \n" \
|
|
" .quad 1b,8b \n" \
|
|
".previous"
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/*
|
|
* Standard code for setting the result of s390 crypto instructions.
|
|
* %0: the register which will receive the result
|
|
* [result]: the register containing the result (e.g. second operand length
|
|
* to compute number of processed bytes].
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
#define __crypt_s390_set_result \
|
|
" lr %0,%[result] \n"
|
|
#else /* CONFIG_64BIT */
|
|
#define __crypt_s390_set_result \
|
|
" lgr %0,%[result] \n"
|
|
#endif
|
|
|
|
/*
|
|
* Executes the KM (CIPHER MESSAGE) operation of the CPU.
|
|
* @param func: the function code passed to KM; see crypt_s390_km_func
|
|
* @param param: address of parameter block; see POP for details on each func
|
|
* @param dest: address of destination memory area
|
|
* @param src: address of source memory area
|
|
* @param src_len: length of src operand in bytes
|
|
* @returns < zero 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 u8* __dest asm("4") = dest;
|
|
register const u8* __src asm("2") = src;
|
|
register long __src_len asm("3") = src_len;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
__asm__ __volatile__ (
|
|
"0: .insn rre,0xB92E0000,%1,%2 \n" /* KM opcode */
|
|
"1: brc 1,0b \n" /* handle partial completion */
|
|
__crypt_s390_set_result
|
|
"6: \n"
|
|
__crypt_s390_fixup
|
|
: "+d" (ret), "+a" (__dest), "+a" (__src),
|
|
[result] "+d" (__src_len)
|
|
: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
|
|
"a" (__param)
|
|
: "cc", "memory"
|
|
);
|
|
if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
|
|
ret = src_len - ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
|
|
* @param func: the function code passed to KM; see crypt_s390_kmc_func
|
|
* @param param: address of parameter block; see POP for details on each func
|
|
* @param dest: address of destination memory area
|
|
* @param src: address of source memory area
|
|
* @param src_len: length of src operand in bytes
|
|
* @returns < zero 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 u8* __dest asm("4") = dest;
|
|
register const u8* __src asm("2") = src;
|
|
register long __src_len asm("3") = src_len;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
__asm__ __volatile__ (
|
|
"0: .insn rre,0xB92F0000,%1,%2 \n" /* KMC opcode */
|
|
"1: brc 1,0b \n" /* handle partial completion */
|
|
__crypt_s390_set_result
|
|
"6: \n"
|
|
__crypt_s390_fixup
|
|
: "+d" (ret), "+a" (__dest), "+a" (__src),
|
|
[result] "+d" (__src_len)
|
|
: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
|
|
"a" (__param)
|
|
: "cc", "memory"
|
|
);
|
|
if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
|
|
ret = src_len - ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
|
|
* of the CPU.
|
|
* @param func: the function code passed to KM; see crypt_s390_kimd_func
|
|
* @param param: address of parameter block; see POP for details on each func
|
|
* @param src: address of source memory area
|
|
* @param src_len: length of src operand in bytes
|
|
* @returns < zero 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;
|
|
|
|
ret = 0;
|
|
__asm__ __volatile__ (
|
|
"0: .insn rre,0xB93E0000,%1,%1 \n" /* KIMD opcode */
|
|
"1: brc 1,0b \n" /* handle partical completion */
|
|
__crypt_s390_set_result
|
|
"6: \n"
|
|
__crypt_s390_fixup
|
|
: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
|
|
: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
|
|
"a" (__param)
|
|
: "cc", "memory"
|
|
);
|
|
if (ret >= 0 && (func & CRYPT_S390_FUNC_MASK)){
|
|
ret = src_len - ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
|
|
* @param func: the function code passed to KM; see crypt_s390_klmd_func
|
|
* @param param: address of parameter block; see POP for details on each func
|
|
* @param src: address of source memory area
|
|
* @param src_len: length of src operand in bytes
|
|
* @returns < zero 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;
|
|
|
|
ret = 0;
|
|
__asm__ __volatile__ (
|
|
"0: .insn rre,0xB93F0000,%1,%1 \n" /* KLMD opcode */
|
|
"1: brc 1,0b \n" /* handle partical completion */
|
|
__crypt_s390_set_result
|
|
"6: \n"
|
|
__crypt_s390_fixup
|
|
: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
|
|
: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
|
|
"a" (__param)
|
|
: "cc", "memory"
|
|
);
|
|
if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
|
|
ret = src_len - ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
|
|
* of the CPU.
|
|
* @param func: the function code passed to KM; see crypt_s390_klmd_func
|
|
* @param param: address of parameter block; see POP for details on each func
|
|
* @param src: address of source memory area
|
|
* @param src_len: length of src operand in bytes
|
|
* @returns < zero 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;
|
|
|
|
ret = 0;
|
|
__asm__ __volatile__ (
|
|
"0: .insn rre,0xB91E0000,%5,%5 \n" /* KMAC opcode */
|
|
"1: brc 1,0b \n" /* handle partical completion */
|
|
__crypt_s390_set_result
|
|
"6: \n"
|
|
__crypt_s390_fixup
|
|
: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
|
|
: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
|
|
"a" (__param)
|
|
: "cc", "memory"
|
|
);
|
|
if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
|
|
ret = src_len - ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Tests if a specific crypto function is implemented on the machine.
|
|
* @param func: the function code of the specific function; 0 if op in general
|
|
* @return 1 if func available; 0 if func or op in general not available
|
|
*/
|
|
static inline int
|
|
crypt_s390_func_available(int func)
|
|
{
|
|
int ret;
|
|
|
|
struct crypt_s390_query_status status = {
|
|
.high = 0,
|
|
.low = 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;
|
|
default:
|
|
ret = 0;
|
|
return ret;
|
|
}
|
|
if (ret >= 0){
|
|
func &= CRYPT_S390_FUNC_MASK;
|
|
func &= 0x7f; //mask modifier bit
|
|
if (func < 64){
|
|
ret = (status.high >> (64 - func - 1)) & 0x1;
|
|
} else {
|
|
ret = (status.low >> (128 - func - 1)) & 0x1;
|
|
}
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#endif // _CRYPTO_ARCH_S390_CRYPT_S390_H
|