Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2017-2019 Linaro Ltd <ard.biesheuvel@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <crypto/aes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <trace/hooks/fips140.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Emit the sbox as volatile const to prevent the compiler from doing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * constant folding on sbox references involving fixed indexes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) static volatile const u8 __cacheline_aligned aes_sbox[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static volatile const u8 __cacheline_aligned aes_inv_sbox[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) extern const u8 crypto_aes_sbox[256] __alias(aes_sbox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) extern const u8 crypto_aes_inv_sbox[256] __alias(aes_inv_sbox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) EXPORT_SYMBOL(crypto_aes_sbox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) EXPORT_SYMBOL(crypto_aes_inv_sbox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static u32 mul_by_x(u32 w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	u32 x = w & 0x7f7f7f7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	u32 y = w & 0x80808080;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	/* multiply by polynomial 'x' (0b10) in GF(2^8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return (x << 1) ^ (y >> 7) * 0x1b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static u32 mul_by_x2(u32 w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	u32 x = w & 0x3f3f3f3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	u32 y = w & 0x80808080;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	u32 z = w & 0x40404040;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	/* multiply by polynomial 'x^2' (0b100) in GF(2^8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	return (x << 2) ^ (y >> 7) * 0x36 ^ (z >> 6) * 0x1b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static u32 mix_columns(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 * Perform the following matrix multiplication in GF(2^8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 * | 0x2 0x3 0x1 0x1 |   | x[0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	 * | 0x1 0x2 0x3 0x1 |   | x[1] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	 * | 0x1 0x1 0x2 0x3 | x | x[2] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	 * | 0x3 0x1 0x1 0x2 |   | x[3] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	u32 y = mul_by_x(x) ^ ror32(x, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	return y ^ ror32(x ^ y, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static u32 inv_mix_columns(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	 * Perform the following matrix multiplication in GF(2^8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	 * | 0xe 0xb 0xd 0x9 |   | x[0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	 * | 0x9 0xe 0xb 0xd |   | x[1] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 * | 0xd 0x9 0xe 0xb | x | x[2] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	 * | 0xb 0xd 0x9 0xe |   | x[3] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	 * which can conveniently be reduced to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	 * | 0x2 0x3 0x1 0x1 |   | 0x5 0x0 0x4 0x0 |   | x[0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	 * | 0x1 0x2 0x3 0x1 |   | 0x0 0x5 0x0 0x4 |   | x[1] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	 * | 0x1 0x1 0x2 0x3 | x | 0x4 0x0 0x5 0x0 | x | x[2] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	 * | 0x3 0x1 0x1 0x2 |   | 0x0 0x4 0x0 0x5 |   | x[3] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	u32 y = mul_by_x2(x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	return mix_columns(x ^ y ^ ror32(y, 16));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static __always_inline u32 subshift(u32 in[], int pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	return (aes_sbox[in[pos] & 0xff]) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	       (aes_sbox[(in[(pos + 1) % 4] >>  8) & 0xff] <<  8) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	       (aes_sbox[(in[(pos + 2) % 4] >> 16) & 0xff] << 16) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	       (aes_sbox[(in[(pos + 3) % 4] >> 24) & 0xff] << 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static __always_inline u32 inv_subshift(u32 in[], int pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	return (aes_inv_sbox[in[pos] & 0xff]) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	       (aes_inv_sbox[(in[(pos + 3) % 4] >>  8) & 0xff] <<  8) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	       (aes_inv_sbox[(in[(pos + 2) % 4] >> 16) & 0xff] << 16) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	       (aes_inv_sbox[(in[(pos + 1) % 4] >> 24) & 0xff] << 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static u32 subw(u32 in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return (aes_sbox[in & 0xff]) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	       (aes_sbox[(in >>  8) & 0xff] <<  8) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	       (aes_sbox[(in >> 16) & 0xff] << 16) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	       (aes_sbox[(in >> 24) & 0xff] << 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  * aes_expandkey - Expands the AES key as described in FIPS-197
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)  * @ctx:	The location where the computed key will be stored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)  * @in_key:	The supplied key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  * @key_len:	The length of the supplied key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * Returns 0 on success. The function fails only if an invalid key size (or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * pointer) is supplied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  * The expanded key size is 240 bytes (max of 14 rounds with a unique 16 bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  * key schedule plus a 16 bytes key which is used before the first round).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  * The decryption key is prepared for the "Equivalent Inverse Cipher" as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * described in FIPS-197. The first slot (16 bytes) of each key (enc or dec) is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * for the initial combination, the second slot for the first round and so on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		  unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	u32 kwords = key_len / sizeof(u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	u32 rc, i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #if defined(CONFIG_CRYPTO_FIPS140) && !defined(BUILD_FIPS140_KO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	err = -(MAX_ERRNO + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	trace_android_vh_aes_expandkey(ctx, in_key, key_len, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (err != -(MAX_ERRNO + 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	err = aes_check_keylen(key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	ctx->key_length = key_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	for (i = 0; i < kwords; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		ctx->key_enc[i] = get_unaligned_le32(in_key + i * sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	for (i = 0, rc = 1; i < 10; i++, rc = mul_by_x(rc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		u32 *rki = ctx->key_enc + (i * kwords);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		u32 *rko = rki + kwords;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		rko[0] = ror32(subw(rki[kwords - 1]), 8) ^ rc ^ rki[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		rko[1] = rko[0] ^ rki[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		rko[2] = rko[1] ^ rki[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		rko[3] = rko[2] ^ rki[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		if (key_len == AES_KEYSIZE_192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			if (i >= 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			rko[4] = rko[3] ^ rki[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			rko[5] = rko[4] ^ rki[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		} else if (key_len == AES_KEYSIZE_256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			if (i >= 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			rko[4] = subw(rko[3]) ^ rki[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			rko[5] = rko[4] ^ rki[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			rko[6] = rko[5] ^ rki[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			rko[7] = rko[6] ^ rki[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	 * Generate the decryption keys for the Equivalent Inverse Cipher.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	 * This involves reversing the order of the round keys, and applying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	 * the Inverse Mix Columns transformation to all but the first and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	 * the last one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	ctx->key_dec[0] = ctx->key_enc[key_len + 24];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	ctx->key_dec[1] = ctx->key_enc[key_len + 25];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	ctx->key_dec[2] = ctx->key_enc[key_len + 26];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	ctx->key_dec[3] = ctx->key_enc[key_len + 27];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	for (i = 4, j = key_len + 20; j > 0; i += 4, j -= 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		ctx->key_dec[i]     = inv_mix_columns(ctx->key_enc[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		ctx->key_dec[i + 1] = inv_mix_columns(ctx->key_enc[j + 1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		ctx->key_dec[i + 2] = inv_mix_columns(ctx->key_enc[j + 2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		ctx->key_dec[i + 3] = inv_mix_columns(ctx->key_enc[j + 3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	ctx->key_dec[i]     = ctx->key_enc[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ctx->key_dec[i + 1] = ctx->key_enc[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	ctx->key_dec[i + 2] = ctx->key_enc[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	ctx->key_dec[i + 3] = ctx->key_enc[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) EXPORT_SYMBOL(aes_expandkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)  * aes_encrypt - Encrypt a single AES block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)  * @ctx:	Context struct containing the key schedule
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)  * @out:	Buffer to store the ciphertext
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)  * @in:		Buffer containing the plaintext
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	const u32 *rkp = ctx->key_enc + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	int rounds = 6 + ctx->key_length / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	u32 st0[4], st1[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	int round;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) #if defined(CONFIG_CRYPTO_FIPS140) && !defined(BUILD_FIPS140_KO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	int hook_inuse = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	trace_android_vh_aes_encrypt(ctx, out, in, &hook_inuse);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (hook_inuse)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	st0[0] = ctx->key_enc[0] ^ get_unaligned_le32(in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	st0[1] = ctx->key_enc[1] ^ get_unaligned_le32(in + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	st0[2] = ctx->key_enc[2] ^ get_unaligned_le32(in + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	st0[3] = ctx->key_enc[3] ^ get_unaligned_le32(in + 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	 * Force the compiler to emit data independent Sbox references,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	 * by xoring the input with Sbox values that are known to add up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	 * to zero. This pulls the entire Sbox into the D-cache before any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	 * data dependent lookups are done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	st0[0] ^= aes_sbox[ 0] ^ aes_sbox[ 64] ^ aes_sbox[134] ^ aes_sbox[195];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	st0[1] ^= aes_sbox[16] ^ aes_sbox[ 82] ^ aes_sbox[158] ^ aes_sbox[221];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	st0[2] ^= aes_sbox[32] ^ aes_sbox[ 96] ^ aes_sbox[160] ^ aes_sbox[234];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	st0[3] ^= aes_sbox[48] ^ aes_sbox[112] ^ aes_sbox[186] ^ aes_sbox[241];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	for (round = 0;; round += 2, rkp += 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		st1[0] = mix_columns(subshift(st0, 0)) ^ rkp[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		st1[1] = mix_columns(subshift(st0, 1)) ^ rkp[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		st1[2] = mix_columns(subshift(st0, 2)) ^ rkp[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		st1[3] = mix_columns(subshift(st0, 3)) ^ rkp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		if (round == rounds - 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		st0[0] = mix_columns(subshift(st1, 0)) ^ rkp[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		st0[1] = mix_columns(subshift(st1, 1)) ^ rkp[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		st0[2] = mix_columns(subshift(st1, 2)) ^ rkp[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		st0[3] = mix_columns(subshift(st1, 3)) ^ rkp[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	put_unaligned_le32(subshift(st1, 0) ^ rkp[4], out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	put_unaligned_le32(subshift(st1, 1) ^ rkp[5], out + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	put_unaligned_le32(subshift(st1, 2) ^ rkp[6], out + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	put_unaligned_le32(subshift(st1, 3) ^ rkp[7], out + 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) EXPORT_SYMBOL(aes_encrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)  * aes_decrypt - Decrypt a single AES block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)  * @ctx:	Context struct containing the key schedule
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)  * @out:	Buffer to store the plaintext
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)  * @in:		Buffer containing the ciphertext
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) void aes_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	const u32 *rkp = ctx->key_dec + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	int rounds = 6 + ctx->key_length / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	u32 st0[4], st1[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	int round;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) #if defined(CONFIG_CRYPTO_FIPS140) && !defined(BUILD_FIPS140_KO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	int hook_inuse = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	trace_android_vh_aes_decrypt(ctx, out, in, &hook_inuse);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (hook_inuse)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	st0[0] = ctx->key_dec[0] ^ get_unaligned_le32(in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	st0[1] = ctx->key_dec[1] ^ get_unaligned_le32(in + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	st0[2] = ctx->key_dec[2] ^ get_unaligned_le32(in + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	st0[3] = ctx->key_dec[3] ^ get_unaligned_le32(in + 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	 * Force the compiler to emit data independent Sbox references,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	 * by xoring the input with Sbox values that are known to add up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	 * to zero. This pulls the entire Sbox into the D-cache before any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	 * data dependent lookups are done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	st0[0] ^= aes_inv_sbox[ 0] ^ aes_inv_sbox[ 64] ^ aes_inv_sbox[129] ^ aes_inv_sbox[200];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	st0[1] ^= aes_inv_sbox[16] ^ aes_inv_sbox[ 83] ^ aes_inv_sbox[150] ^ aes_inv_sbox[212];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	st0[2] ^= aes_inv_sbox[32] ^ aes_inv_sbox[ 96] ^ aes_inv_sbox[160] ^ aes_inv_sbox[236];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	st0[3] ^= aes_inv_sbox[48] ^ aes_inv_sbox[112] ^ aes_inv_sbox[187] ^ aes_inv_sbox[247];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	for (round = 0;; round += 2, rkp += 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		st1[0] = inv_mix_columns(inv_subshift(st0, 0)) ^ rkp[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		st1[1] = inv_mix_columns(inv_subshift(st0, 1)) ^ rkp[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		st1[2] = inv_mix_columns(inv_subshift(st0, 2)) ^ rkp[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		st1[3] = inv_mix_columns(inv_subshift(st0, 3)) ^ rkp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		if (round == rounds - 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		st0[0] = inv_mix_columns(inv_subshift(st1, 0)) ^ rkp[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		st0[1] = inv_mix_columns(inv_subshift(st1, 1)) ^ rkp[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		st0[2] = inv_mix_columns(inv_subshift(st1, 2)) ^ rkp[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		st0[3] = inv_mix_columns(inv_subshift(st1, 3)) ^ rkp[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	put_unaligned_le32(inv_subshift(st1, 0) ^ rkp[4], out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	put_unaligned_le32(inv_subshift(st1, 1) ^ rkp[5], out + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	put_unaligned_le32(inv_subshift(st1, 2) ^ rkp[6], out + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	put_unaligned_le32(inv_subshift(st1, 3) ^ rkp[7], out + 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) EXPORT_SYMBOL(aes_decrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) MODULE_DESCRIPTION("Generic AES library");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) MODULE_LICENSE("GPL v2");