330 lines
10 KiB
C
330 lines
10 KiB
C
/*
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* Cryptographic API.
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*
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* Support for s390 cryptographic instructions.
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*
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* Copyright IBM Corp. 2003,2007
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* Author(s): Thomas Spatzier
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* Jan Glauber (jan.glauber@de.ibm.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
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#define _CRYPTO_ARCH_S390_CRYPT_S390_H
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#include <asm/errno.h>
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#define CRYPT_S390_OP_MASK 0xFF00
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#define CRYPT_S390_FUNC_MASK 0x00FF
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#define CRYPT_S390_PRIORITY 300
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#define CRYPT_S390_COMPOSITE_PRIORITY 400
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/* s390 cryptographic operations */
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enum crypt_s390_operations {
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CRYPT_S390_KM = 0x0100,
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CRYPT_S390_KMC = 0x0200,
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CRYPT_S390_KIMD = 0x0300,
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CRYPT_S390_KLMD = 0x0400,
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CRYPT_S390_KMAC = 0x0500
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};
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/*
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* function codes for KM (CIPHER MESSAGE) instruction
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* 0x80 is the decipher modifier bit
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*/
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enum crypt_s390_km_func {
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KM_QUERY = CRYPT_S390_KM | 0x0,
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KM_DEA_ENCRYPT = CRYPT_S390_KM | 0x1,
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KM_DEA_DECRYPT = CRYPT_S390_KM | 0x1 | 0x80,
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KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
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KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
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KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
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KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
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KM_AES_128_ENCRYPT = CRYPT_S390_KM | 0x12,
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KM_AES_128_DECRYPT = CRYPT_S390_KM | 0x12 | 0x80,
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KM_AES_192_ENCRYPT = CRYPT_S390_KM | 0x13,
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KM_AES_192_DECRYPT = CRYPT_S390_KM | 0x13 | 0x80,
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KM_AES_256_ENCRYPT = CRYPT_S390_KM | 0x14,
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KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80,
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};
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/*
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* function codes for KMC (CIPHER MESSAGE WITH CHAINING)
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* instruction
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*/
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enum crypt_s390_kmc_func {
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KMC_QUERY = CRYPT_S390_KMC | 0x0,
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KMC_DEA_ENCRYPT = CRYPT_S390_KMC | 0x1,
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KMC_DEA_DECRYPT = CRYPT_S390_KMC | 0x1 | 0x80,
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KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
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KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
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KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
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KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
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KMC_AES_128_ENCRYPT = CRYPT_S390_KMC | 0x12,
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KMC_AES_128_DECRYPT = CRYPT_S390_KMC | 0x12 | 0x80,
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KMC_AES_192_ENCRYPT = CRYPT_S390_KMC | 0x13,
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KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80,
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KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14,
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KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80,
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KMC_PRNG = CRYPT_S390_KMC | 0x43,
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};
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/*
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* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
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* instruction
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*/
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enum crypt_s390_kimd_func {
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KIMD_QUERY = CRYPT_S390_KIMD | 0,
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KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
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KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
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KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
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};
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/*
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* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
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* instruction
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*/
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enum crypt_s390_klmd_func {
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KLMD_QUERY = CRYPT_S390_KLMD | 0,
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KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
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KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
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KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
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};
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/*
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* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
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* instruction
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*/
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enum crypt_s390_kmac_func {
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KMAC_QUERY = CRYPT_S390_KMAC | 0,
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KMAC_DEA = CRYPT_S390_KMAC | 1,
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KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
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KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
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};
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/**
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* crypt_s390_km:
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* @func: the function code passed to KM; see crypt_s390_km_func
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* @param: address of parameter block; see POP for details on each func
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* @dest: address of destination memory area
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* @src: address of source memory area
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* @src_len: length of src operand in bytes
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*
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* Executes the KM (CIPHER MESSAGE) operation of the CPU.
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*
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* Returns -1 for failure, 0 for the query func, number of processed
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* bytes for encryption/decryption funcs
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*/
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static inline int crypt_s390_km(long func, void *param,
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u8 *dest, const u8 *src, long src_len)
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{
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register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
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register void *__param asm("1") = param;
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register const u8 *__src asm("2") = src;
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register long __src_len asm("3") = src_len;
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register u8 *__dest asm("4") = dest;
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int ret;
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asm volatile(
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"0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
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"1: brc 1,0b \n" /* handle partial completion */
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" la %0,0\n"
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"2:\n"
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EX_TABLE(0b,2b) EX_TABLE(1b,2b)
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: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
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: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
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if (ret < 0)
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return ret;
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return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
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}
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/**
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* crypt_s390_kmc:
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* @func: the function code passed to KM; see crypt_s390_kmc_func
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* @param: address of parameter block; see POP for details on each func
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* @dest: address of destination memory area
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* @src: address of source memory area
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* @src_len: length of src operand in bytes
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*
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* Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
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*
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* Returns -1 for failure, 0 for the query func, number of processed
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* bytes for encryption/decryption funcs
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*/
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static inline int crypt_s390_kmc(long func, void *param,
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u8 *dest, const u8 *src, long src_len)
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{
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register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
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register void *__param asm("1") = param;
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register const u8 *__src asm("2") = src;
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register long __src_len asm("3") = src_len;
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register u8 *__dest asm("4") = dest;
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int ret;
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asm volatile(
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"0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
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"1: brc 1,0b \n" /* handle partial completion */
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" la %0,0\n"
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"2:\n"
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EX_TABLE(0b,2b) EX_TABLE(1b,2b)
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: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
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: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
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if (ret < 0)
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return ret;
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return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
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}
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/**
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* crypt_s390_kimd:
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* @func: the function code passed to KM; see crypt_s390_kimd_func
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* @param: address of parameter block; see POP for details on each func
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* @src: address of source memory area
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* @src_len: length of src operand in bytes
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*
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* Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
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* of the CPU.
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*
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* Returns -1 for failure, 0 for the query func, number of processed
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* bytes for digest funcs
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*/
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static inline int crypt_s390_kimd(long func, void *param,
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const u8 *src, long src_len)
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{
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register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
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register void *__param asm("1") = param;
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register const u8 *__src asm("2") = src;
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register long __src_len asm("3") = src_len;
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int ret;
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asm volatile(
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"0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
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"1: brc 1,0b \n" /* handle partial completion */
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" la %0,0\n"
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"2:\n"
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EX_TABLE(0b,2b) EX_TABLE(1b,2b)
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: "=d" (ret), "+a" (__src), "+d" (__src_len)
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: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
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if (ret < 0)
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return ret;
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return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
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}
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/**
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* crypt_s390_klmd:
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* @func: the function code passed to KM; see crypt_s390_klmd_func
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* @param: address of parameter block; see POP for details on each func
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* @src: address of source memory area
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* @src_len: length of src operand in bytes
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*
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* Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
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*
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* Returns -1 for failure, 0 for the query func, number of processed
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* bytes for digest funcs
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*/
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static inline int crypt_s390_klmd(long func, void *param,
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const u8 *src, long src_len)
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{
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register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
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register void *__param asm("1") = param;
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register const u8 *__src asm("2") = src;
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register long __src_len asm("3") = src_len;
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int ret;
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asm volatile(
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"0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
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"1: brc 1,0b \n" /* handle partial completion */
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" la %0,0\n"
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"2:\n"
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EX_TABLE(0b,2b) EX_TABLE(1b,2b)
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: "=d" (ret), "+a" (__src), "+d" (__src_len)
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: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
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if (ret < 0)
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return ret;
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return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
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}
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/**
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* crypt_s390_kmac:
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* @func: the function code passed to KM; see crypt_s390_klmd_func
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* @param: address of parameter block; see POP for details on each func
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* @src: address of source memory area
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* @src_len: length of src operand in bytes
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*
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* Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
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* of the CPU.
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*
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* Returns -1 for failure, 0 for the query func, number of processed
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* bytes for digest funcs
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*/
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static inline int crypt_s390_kmac(long func, void *param,
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const u8 *src, long src_len)
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{
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register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
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register void *__param asm("1") = param;
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register const u8 *__src asm("2") = src;
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register long __src_len asm("3") = src_len;
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int ret;
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asm volatile(
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"0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
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"1: brc 1,0b \n" /* handle partial completion */
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" la %0,0\n"
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"2:\n"
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EX_TABLE(0b,2b) EX_TABLE(1b,2b)
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: "=d" (ret), "+a" (__src), "+d" (__src_len)
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: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
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if (ret < 0)
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return ret;
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return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
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}
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/**
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* crypt_s390_func_available:
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* @func: the function code of the specific function; 0 if op in general
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*
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* Tests if a specific crypto function is implemented on the machine.
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*
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* Returns 1 if func available; 0 if func or op in general not available
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*/
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static inline int crypt_s390_func_available(int func)
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{
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unsigned char status[16];
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int ret;
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/* check if CPACF facility (bit 17) is available */
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if (!(stfl() & 1ULL << (31 - 17)))
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return 0;
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switch (func & CRYPT_S390_OP_MASK) {
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case CRYPT_S390_KM:
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ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
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break;
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case CRYPT_S390_KMC:
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ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
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break;
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case CRYPT_S390_KIMD:
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ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
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break;
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case CRYPT_S390_KLMD:
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ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
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break;
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case CRYPT_S390_KMAC:
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ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
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break;
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default:
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return 0;
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}
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if (ret < 0)
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return 0;
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func &= CRYPT_S390_FUNC_MASK;
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func &= 0x7f; /* mask modifier bit */
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return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
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}
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#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */
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