Revision 2f8619846755176a6720c71d580ffd09394a74bc authored by Mian Yousaf Kaukab on 29 June 2021, 15:06:43 UTC, committed by Alexandre Belloni on 10 July 2021, 00:58:31 UTC
commit 03623b4b041c ("rtc: pcf2127: add tamper detection support")
added support for timestamp interrupts. However they are not being
handled in the irq handler. If a timestamp interrupt occurs it
results in kernel disabling the interrupt and displaying the call
trace:
[ 121.145580] irq 78: nobody cared (try booting with the "irqpoll" option)
...
[ 121.238087] [<00000000c4d69393>] irq_default_primary_handler threaded [<000000000a90d25b>] pcf2127_rtc_irq [rtc_pcf2127]
[ 121.248971] Disabling IRQ #78
Handle timestamp interrupts in pcf2127_rtc_irq(). Save time stamp
before clearing TSF1 and TSF2 flags so that it can't be overwritten.
Set a flag to mark if the timestamp is valid and only report to sysfs
if the flag is set. To mimic the hardware behavior, don’t save
another timestamp until the first one has been read by the userspace.
However, if the alarm irq is not configured, keep the old way of
handling timestamp interrupt in the timestamp0 sysfs calls.
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Reviewed-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Tested-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210629150643.31551-1-ykaukab@suse.de
1 parent 37aadf9
cast6_generic.c
// SPDX-License-Identifier: GPL-2.0-or-later
/* Kernel cryptographic api.
* cast6.c - Cast6 cipher algorithm [rfc2612].
*
* CAST-256 (*cast6*) is a DES like Substitution-Permutation Network (SPN)
* cryptosystem built upon the CAST-128 (*cast5*) [rfc2144] encryption
* algorithm.
*
* Copyright (C) 2003 Kartikey Mahendra Bhatt <kartik_me@hotmail.com>.
*/
#include <asm/unaligned.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <crypto/cast6.h>
#define s1 cast_s1
#define s2 cast_s2
#define s3 cast_s3
#define s4 cast_s4
#define F1(D, r, m) ((I = ((m) + (D))), (I = rol32(I, (r))), \
(((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]))
#define F2(D, r, m) ((I = ((m) ^ (D))), (I = rol32(I, (r))), \
(((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]))
#define F3(D, r, m) ((I = ((m) - (D))), (I = rol32(I, (r))), \
(((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]))
static const u32 Tm[24][8] = {
{ 0x5a827999, 0xc95c653a, 0x383650db, 0xa7103c7c, 0x15ea281d,
0x84c413be, 0xf39dff5f, 0x6277eb00 } ,
{ 0xd151d6a1, 0x402bc242, 0xaf05ade3, 0x1ddf9984, 0x8cb98525,
0xfb9370c6, 0x6a6d5c67, 0xd9474808 } ,
{ 0x482133a9, 0xb6fb1f4a, 0x25d50aeb, 0x94aef68c, 0x0388e22d,
0x7262cdce, 0xe13cb96f, 0x5016a510 } ,
{ 0xbef090b1, 0x2dca7c52, 0x9ca467f3, 0x0b7e5394, 0x7a583f35,
0xe9322ad6, 0x580c1677, 0xc6e60218 } ,
{ 0x35bfedb9, 0xa499d95a, 0x1373c4fb, 0x824db09c, 0xf1279c3d,
0x600187de, 0xcedb737f, 0x3db55f20 } ,
{ 0xac8f4ac1, 0x1b693662, 0x8a432203, 0xf91d0da4, 0x67f6f945,
0xd6d0e4e6, 0x45aad087, 0xb484bc28 } ,
{ 0x235ea7c9, 0x9238936a, 0x01127f0b, 0x6fec6aac, 0xdec6564d,
0x4da041ee, 0xbc7a2d8f, 0x2b541930 } ,
{ 0x9a2e04d1, 0x0907f072, 0x77e1dc13, 0xe6bbc7b4, 0x5595b355,
0xc46f9ef6, 0x33498a97, 0xa2237638 } ,
{ 0x10fd61d9, 0x7fd74d7a, 0xeeb1391b, 0x5d8b24bc, 0xcc65105d,
0x3b3efbfe, 0xaa18e79f, 0x18f2d340 } ,
{ 0x87ccbee1, 0xf6a6aa82, 0x65809623, 0xd45a81c4, 0x43346d65,
0xb20e5906, 0x20e844a7, 0x8fc23048 } ,
{ 0xfe9c1be9, 0x6d76078a, 0xdc4ff32b, 0x4b29decc, 0xba03ca6d,
0x28ddb60e, 0x97b7a1af, 0x06918d50 } ,
{ 0x756b78f1, 0xe4456492, 0x531f5033, 0xc1f93bd4, 0x30d32775,
0x9fad1316, 0x0e86feb7, 0x7d60ea58 } ,
{ 0xec3ad5f9, 0x5b14c19a, 0xc9eead3b, 0x38c898dc, 0xa7a2847d,
0x167c701e, 0x85565bbf, 0xf4304760 } ,
{ 0x630a3301, 0xd1e41ea2, 0x40be0a43, 0xaf97f5e4, 0x1e71e185,
0x8d4bcd26, 0xfc25b8c7, 0x6affa468 } ,
{ 0xd9d99009, 0x48b37baa, 0xb78d674b, 0x266752ec, 0x95413e8d,
0x041b2a2e, 0x72f515cf, 0xe1cf0170 } ,
{ 0x50a8ed11, 0xbf82d8b2, 0x2e5cc453, 0x9d36aff4, 0x0c109b95,
0x7aea8736, 0xe9c472d7, 0x589e5e78 } ,
{ 0xc7784a19, 0x365235ba, 0xa52c215b, 0x14060cfc, 0x82dff89d,
0xf1b9e43e, 0x6093cfdf, 0xcf6dbb80 } ,
{ 0x3e47a721, 0xad2192c2, 0x1bfb7e63, 0x8ad56a04, 0xf9af55a5,
0x68894146, 0xd7632ce7, 0x463d1888 } ,
{ 0xb5170429, 0x23f0efca, 0x92cadb6b, 0x01a4c70c, 0x707eb2ad,
0xdf589e4e, 0x4e3289ef, 0xbd0c7590 } ,
{ 0x2be66131, 0x9ac04cd2, 0x099a3873, 0x78742414, 0xe74e0fb5,
0x5627fb56, 0xc501e6f7, 0x33dbd298 } ,
{ 0xa2b5be39, 0x118fa9da, 0x8069957b, 0xef43811c, 0x5e1d6cbd,
0xccf7585e, 0x3bd143ff, 0xaaab2fa0 } ,
{ 0x19851b41, 0x885f06e2, 0xf738f283, 0x6612de24, 0xd4ecc9c5,
0x43c6b566, 0xb2a0a107, 0x217a8ca8 } ,
{ 0x90547849, 0xff2e63ea, 0x6e084f8b, 0xdce23b2c, 0x4bbc26cd,
0xba96126e, 0x296ffe0f, 0x9849e9b0 } ,
{ 0x0723d551, 0x75fdc0f2, 0xe4d7ac93, 0x53b19834, 0xc28b83d5,
0x31656f76, 0xa03f5b17, 0x0f1946b8 }
};
static const u8 Tr[4][8] = {
{ 0x13, 0x04, 0x15, 0x06, 0x17, 0x08, 0x19, 0x0a } ,
{ 0x1b, 0x0c, 0x1d, 0x0e, 0x1f, 0x10, 0x01, 0x12 } ,
{ 0x03, 0x14, 0x05, 0x16, 0x07, 0x18, 0x09, 0x1a } ,
{ 0x0b, 0x1c, 0x0d, 0x1e, 0x0f, 0x00, 0x11, 0x02 }
};
/* forward octave */
static inline void W(u32 *key, unsigned int i)
{
u32 I;
key[6] ^= F1(key[7], Tr[i % 4][0], Tm[i][0]);
key[5] ^= F2(key[6], Tr[i % 4][1], Tm[i][1]);
key[4] ^= F3(key[5], Tr[i % 4][2], Tm[i][2]);
key[3] ^= F1(key[4], Tr[i % 4][3], Tm[i][3]);
key[2] ^= F2(key[3], Tr[i % 4][4], Tm[i][4]);
key[1] ^= F3(key[2], Tr[i % 4][5], Tm[i][5]);
key[0] ^= F1(key[1], Tr[i % 4][6], Tm[i][6]);
key[7] ^= F2(key[0], Tr[i % 4][7], Tm[i][7]);
}
int __cast6_setkey(struct cast6_ctx *c, const u8 *in_key, unsigned int key_len)
{
int i;
u32 key[8];
__be32 p_key[8]; /* padded key */
if (key_len % 4 != 0)
return -EINVAL;
memset(p_key, 0, 32);
memcpy(p_key, in_key, key_len);
key[0] = be32_to_cpu(p_key[0]); /* A */
key[1] = be32_to_cpu(p_key[1]); /* B */
key[2] = be32_to_cpu(p_key[2]); /* C */
key[3] = be32_to_cpu(p_key[3]); /* D */
key[4] = be32_to_cpu(p_key[4]); /* E */
key[5] = be32_to_cpu(p_key[5]); /* F */
key[6] = be32_to_cpu(p_key[6]); /* G */
key[7] = be32_to_cpu(p_key[7]); /* H */
for (i = 0; i < 12; i++) {
W(key, 2 * i);
W(key, 2 * i + 1);
c->Kr[i][0] = key[0] & 0x1f;
c->Kr[i][1] = key[2] & 0x1f;
c->Kr[i][2] = key[4] & 0x1f;
c->Kr[i][3] = key[6] & 0x1f;
c->Km[i][0] = key[7];
c->Km[i][1] = key[5];
c->Km[i][2] = key[3];
c->Km[i][3] = key[1];
}
return 0;
}
EXPORT_SYMBOL_GPL(__cast6_setkey);
int cast6_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
return __cast6_setkey(crypto_tfm_ctx(tfm), key, keylen);
}
EXPORT_SYMBOL_GPL(cast6_setkey);
/*forward quad round*/
static inline void Q(u32 *block, const u8 *Kr, const u32 *Km)
{
u32 I;
block[2] ^= F1(block[3], Kr[0], Km[0]);
block[1] ^= F2(block[2], Kr[1], Km[1]);
block[0] ^= F3(block[1], Kr[2], Km[2]);
block[3] ^= F1(block[0], Kr[3], Km[3]);
}
/*reverse quad round*/
static inline void QBAR(u32 *block, const u8 *Kr, const u32 *Km)
{
u32 I;
block[3] ^= F1(block[0], Kr[3], Km[3]);
block[0] ^= F3(block[1], Kr[2], Km[2]);
block[1] ^= F2(block[2], Kr[1], Km[1]);
block[2] ^= F1(block[3], Kr[0], Km[0]);
}
void __cast6_encrypt(const void *ctx, u8 *outbuf, const u8 *inbuf)
{
const struct cast6_ctx *c = ctx;
u32 block[4];
const u32 *Km;
const u8 *Kr;
block[0] = get_unaligned_be32(inbuf);
block[1] = get_unaligned_be32(inbuf + 4);
block[2] = get_unaligned_be32(inbuf + 8);
block[3] = get_unaligned_be32(inbuf + 12);
Km = c->Km[0]; Kr = c->Kr[0]; Q(block, Kr, Km);
Km = c->Km[1]; Kr = c->Kr[1]; Q(block, Kr, Km);
Km = c->Km[2]; Kr = c->Kr[2]; Q(block, Kr, Km);
Km = c->Km[3]; Kr = c->Kr[3]; Q(block, Kr, Km);
Km = c->Km[4]; Kr = c->Kr[4]; Q(block, Kr, Km);
Km = c->Km[5]; Kr = c->Kr[5]; Q(block, Kr, Km);
Km = c->Km[6]; Kr = c->Kr[6]; QBAR(block, Kr, Km);
Km = c->Km[7]; Kr = c->Kr[7]; QBAR(block, Kr, Km);
Km = c->Km[8]; Kr = c->Kr[8]; QBAR(block, Kr, Km);
Km = c->Km[9]; Kr = c->Kr[9]; QBAR(block, Kr, Km);
Km = c->Km[10]; Kr = c->Kr[10]; QBAR(block, Kr, Km);
Km = c->Km[11]; Kr = c->Kr[11]; QBAR(block, Kr, Km);
put_unaligned_be32(block[0], outbuf);
put_unaligned_be32(block[1], outbuf + 4);
put_unaligned_be32(block[2], outbuf + 8);
put_unaligned_be32(block[3], outbuf + 12);
}
EXPORT_SYMBOL_GPL(__cast6_encrypt);
static void cast6_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
{
__cast6_encrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
}
void __cast6_decrypt(const void *ctx, u8 *outbuf, const u8 *inbuf)
{
const struct cast6_ctx *c = ctx;
u32 block[4];
const u32 *Km;
const u8 *Kr;
block[0] = get_unaligned_be32(inbuf);
block[1] = get_unaligned_be32(inbuf + 4);
block[2] = get_unaligned_be32(inbuf + 8);
block[3] = get_unaligned_be32(inbuf + 12);
Km = c->Km[11]; Kr = c->Kr[11]; Q(block, Kr, Km);
Km = c->Km[10]; Kr = c->Kr[10]; Q(block, Kr, Km);
Km = c->Km[9]; Kr = c->Kr[9]; Q(block, Kr, Km);
Km = c->Km[8]; Kr = c->Kr[8]; Q(block, Kr, Km);
Km = c->Km[7]; Kr = c->Kr[7]; Q(block, Kr, Km);
Km = c->Km[6]; Kr = c->Kr[6]; Q(block, Kr, Km);
Km = c->Km[5]; Kr = c->Kr[5]; QBAR(block, Kr, Km);
Km = c->Km[4]; Kr = c->Kr[4]; QBAR(block, Kr, Km);
Km = c->Km[3]; Kr = c->Kr[3]; QBAR(block, Kr, Km);
Km = c->Km[2]; Kr = c->Kr[2]; QBAR(block, Kr, Km);
Km = c->Km[1]; Kr = c->Kr[1]; QBAR(block, Kr, Km);
Km = c->Km[0]; Kr = c->Kr[0]; QBAR(block, Kr, Km);
put_unaligned_be32(block[0], outbuf);
put_unaligned_be32(block[1], outbuf + 4);
put_unaligned_be32(block[2], outbuf + 8);
put_unaligned_be32(block[3], outbuf + 12);
}
EXPORT_SYMBOL_GPL(__cast6_decrypt);
static void cast6_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
{
__cast6_decrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
}
static struct crypto_alg alg = {
.cra_name = "cast6",
.cra_driver_name = "cast6-generic",
.cra_priority = 100,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = CAST6_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct cast6_ctx),
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {
.cia_min_keysize = CAST6_MIN_KEY_SIZE,
.cia_max_keysize = CAST6_MAX_KEY_SIZE,
.cia_setkey = cast6_setkey,
.cia_encrypt = cast6_encrypt,
.cia_decrypt = cast6_decrypt}
}
};
static int __init cast6_mod_init(void)
{
return crypto_register_alg(&alg);
}
static void __exit cast6_mod_fini(void)
{
crypto_unregister_alg(&alg);
}
subsys_initcall(cast6_mod_init);
module_exit(cast6_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cast6 Cipher Algorithm");
MODULE_ALIAS_CRYPTO("cast6");
MODULE_ALIAS_CRYPTO("cast6-generic");
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