diff options
| -rw-r--r-- | crypto/Kconfig | 1 | ||||
| -rw-r--r-- | crypto/sm4_generic.c | 153 | ||||
| -rw-r--r-- | include/crypto/sm4.h | 24 | ||||
| -rw-r--r-- | lib/crypto/Kconfig | 3 | ||||
| -rw-r--r-- | lib/crypto/Makefile | 3 | ||||
| -rw-r--r-- | lib/crypto/sm4.c | 176 |
6 files changed, 208 insertions, 152 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 64b772c5d1c9..5bf86f5d59db 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1547,6 +1547,7 @@ config CRYPTO_SERPENT_AVX2_X86_64 config CRYPTO_SM4 tristate "SM4 cipher algorithm" select CRYPTO_ALGAPI + select CRYPTO_LIB_SM4 help SM4 cipher algorithms (OSCCA GB/T 32907-2016). diff --git a/crypto/sm4_generic.c b/crypto/sm4_generic.c index 016dbc595705..d19d01f852a9 100644 --- a/crypto/sm4_generic.c +++ b/crypto/sm4_generic.c @@ -16,139 +16,13 @@ #include <asm/byteorder.h> #include <asm/unaligned.h> -static const u32 fk[4] = { - 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc -}; - -static const u8 sbox[256] = { - 0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, - 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, - 0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, - 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, - 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, - 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, - 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, - 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, - 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, - 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8, - 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, - 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35, - 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, - 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, - 0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, - 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, - 0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, - 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, - 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, - 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, - 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, - 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f, - 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, - 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, - 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, - 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, - 0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, - 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, - 0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, - 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, - 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, - 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48 -}; - -static const u32 ck[] = { - 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, - 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, - 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, - 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, - 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, - 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, - 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, - 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 -}; - -static u32 sm4_t_non_lin_sub(u32 x) -{ - int i; - u8 *b = (u8 *)&x; - - for (i = 0; i < 4; ++i) - b[i] = sbox[b[i]]; - - return x; -} - -static u32 sm4_key_lin_sub(u32 x) -{ - return x ^ rol32(x, 13) ^ rol32(x, 23); - -} - -static u32 sm4_enc_lin_sub(u32 x) -{ - return x ^ rol32(x, 2) ^ rol32(x, 10) ^ rol32(x, 18) ^ rol32(x, 24); -} - -static u32 sm4_key_sub(u32 x) -{ - return sm4_key_lin_sub(sm4_t_non_lin_sub(x)); -} - -static u32 sm4_enc_sub(u32 x) -{ - return sm4_enc_lin_sub(sm4_t_non_lin_sub(x)); -} - -static u32 sm4_round(const u32 *x, const u32 rk) -{ - return x[0] ^ sm4_enc_sub(x[1] ^ x[2] ^ x[3] ^ rk); -} - - -/** - * crypto_sm4_expand_key - Expands the SM4 key as described in GB/T 32907-2016 - * @ctx: The location where the computed key will be stored. - * @in_key: The supplied key. - * @key_len: The length of the supplied key. - * - * Returns 0 on success. The function fails only if an invalid key size (or - * pointer) is supplied. - */ -int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key, - unsigned int key_len) -{ - u32 rk[4], t; - const u32 *key = (u32 *)in_key; - int i; - - if (key_len != SM4_KEY_SIZE) - return -EINVAL; - - for (i = 0; i < 4; ++i) - rk[i] = get_unaligned_be32(&key[i]) ^ fk[i]; - - for (i = 0; i < 32; ++i) { - t = rk[0] ^ sm4_key_sub(rk[1] ^ rk[2] ^ rk[3] ^ ck[i]); - ctx->rkey_enc[i] = t; - rk[0] = rk[1]; - rk[1] = rk[2]; - rk[2] = rk[3]; - rk[3] = t; - } - - for (i = 0; i < 32; ++i) - ctx->rkey_dec[i] = ctx->rkey_enc[31 - i]; - - return 0; -} -EXPORT_SYMBOL_GPL(crypto_sm4_expand_key); - /** * crypto_sm4_set_key - Set the SM4 key. * @tfm: The %crypto_tfm that is used in the context. * @in_key: The input key. * @key_len: The size of the key. * - * This function uses crypto_sm4_expand_key() to expand the key. + * This function uses sm4_expandkey() to expand the key. * &crypto_sm4_ctx _must_ be the private data embedded in @tfm which is * retrieved with crypto_tfm_ctx(). * @@ -159,36 +33,17 @@ int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key, { struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); - return crypto_sm4_expand_key(ctx, in_key, key_len); + return sm4_expandkey(ctx, in_key, key_len); } EXPORT_SYMBOL_GPL(crypto_sm4_set_key); -static void sm4_do_crypt(const u32 *rk, u32 *out, const u32 *in) -{ - u32 x[4], i, t; - - for (i = 0; i < 4; ++i) - x[i] = get_unaligned_be32(&in[i]); - - for (i = 0; i < 32; ++i) { - t = sm4_round(x, rk[i]); - x[0] = x[1]; - x[1] = x[2]; - x[2] = x[3]; - x[3] = t; - } - - for (i = 0; i < 4; ++i) - put_unaligned_be32(x[3 - i], &out[i]); -} - /* encrypt a block of text */ void crypto_sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) { const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); - sm4_do_crypt(ctx->rkey_enc, (u32 *)out, (u32 *)in); + sm4_crypt_block(ctx->rkey_enc, out, in); } EXPORT_SYMBOL_GPL(crypto_sm4_encrypt); @@ -198,7 +53,7 @@ void crypto_sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) { const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); - sm4_do_crypt(ctx->rkey_dec, (u32 *)out, (u32 *)in); + sm4_crypt_block(ctx->rkey_dec, out, in); } EXPORT_SYMBOL_GPL(crypto_sm4_decrypt); diff --git a/include/crypto/sm4.h b/include/crypto/sm4.h index 7afd730d16ff..06322325f862 100644 --- a/include/crypto/sm4.h +++ b/include/crypto/sm4.h @@ -3,6 +3,7 @@ /* * Common values for the SM4 algorithm * Copyright (C) 2018 ARM Limited or its affiliates. + * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> */ #ifndef _CRYPTO_SM4_H @@ -20,11 +21,28 @@ struct crypto_sm4_ctx { u32 rkey_dec[SM4_RKEY_WORDS]; }; -int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key, - unsigned int key_len); -int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key, +/** + * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016 + * @ctx: The location where the computed key will be stored. + * @in_key: The supplied key. + * @key_len: The length of the supplied key. + * + * Returns 0 on success. The function fails only if an invalid key size (or + * pointer) is supplied. + */ +int sm4_expandkey(struct crypto_sm4_ctx *ctx, const u8 *in_key, unsigned int key_len); +/** + * sm4_crypt_block - Encrypt or decrypt a single SM4 block + * @rk: The rkey_enc for encrypt or rkey_dec for decrypt + * @out: Buffer to store output data + * @in: Buffer containing the input data + */ +void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in); + +int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key, + unsigned int key_len); void crypto_sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in); void crypto_sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in); diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig index 14c032de276e..545ccbddf6a1 100644 --- a/lib/crypto/Kconfig +++ b/lib/crypto/Kconfig @@ -128,3 +128,6 @@ config CRYPTO_LIB_CHACHA20POLY1305 config CRYPTO_LIB_SHA256 tristate + +config CRYPTO_LIB_SM4 + tristate diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile index 3a435629d9ce..73205ed269ba 100644 --- a/lib/crypto/Makefile +++ b/lib/crypto/Makefile @@ -38,6 +38,9 @@ libpoly1305-y += poly1305.o obj-$(CONFIG_CRYPTO_LIB_SHA256) += libsha256.o libsha256-y := sha256.o +obj-$(CONFIG_CRYPTO_LIB_SM4) += libsm4.o +libsm4-y := sm4.o + ifneq ($(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS),y) libblake2s-y += blake2s-selftest.o libchacha20poly1305-y += chacha20poly1305-selftest.o diff --git a/lib/crypto/sm4.c b/lib/crypto/sm4.c new file mode 100644 index 000000000000..5fbf8c741a2f --- /dev/null +++ b/lib/crypto/sm4.c @@ -0,0 +1,176 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SM4, as specified in + * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html + * + * Copyright (C) 2018 ARM Limited or its affiliates. + * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> + */ + +#include <linux/module.h> +#include <asm/unaligned.h> +#include <crypto/sm4.h> + +static const u32 fk[4] = { + 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc +}; + +static const u32 __cacheline_aligned ck[32] = { + 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, + 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, + 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, + 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, + 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, + 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, + 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, + 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 +}; + +static const u8 __cacheline_aligned sbox[256] = { + 0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, + 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, + 0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, + 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, + 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, + 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, + 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, + 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, + 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, + 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8, + 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, + 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35, + 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, + 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, + 0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, + 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, + 0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, + 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, + 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, + 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, + 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, + 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f, + 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, + 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, + 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, + 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, + 0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, + 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, + 0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, + 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, + 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, + 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48 +}; + +static inline u32 sm4_t_non_lin_sub(u32 x) +{ + u32 out; + + out = (u32)sbox[x & 0xff]; + out |= (u32)sbox[(x >> 8) & 0xff] << 8; + out |= (u32)sbox[(x >> 16) & 0xff] << 16; + out |= (u32)sbox[(x >> 24) & 0xff] << 24; + + return out; +} + +static inline u32 sm4_key_lin_sub(u32 x) +{ + return x ^ rol32(x, 13) ^ rol32(x, 23); +} + +static inline u32 sm4_enc_lin_sub(u32 x) +{ + return x ^ rol32(x, 2) ^ rol32(x, 10) ^ rol32(x, 18) ^ rol32(x, 24); +} + +static inline u32 sm4_key_sub(u32 x) +{ + return sm4_key_lin_sub(sm4_t_non_lin_sub(x)); +} + +static inline u32 sm4_enc_sub(u32 x) +{ + return sm4_enc_lin_sub(sm4_t_non_lin_sub(x)); +} + +static inline u32 sm4_round(u32 x0, u32 x1, u32 x2, u32 x3, u32 rk) +{ + return x0 ^ sm4_enc_sub(x1 ^ x2 ^ x3 ^ rk); +} + + +/** + * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016 + * @ctx: The location where the computed key will be stored. + * @in_key: The supplied key. + * @key_len: The length of the supplied key. + * + * Returns 0 on success. The function fails only if an invalid key size (or + * pointer) is supplied. + */ +int sm4_expandkey(struct crypto_sm4_ctx *ctx, const u8 *in_key, + unsigned int key_len) +{ + u32 rk[4]; + const u32 *key = (u32 *)in_key; + int i; + + if (key_len != SM4_KEY_SIZE) + return -EINVAL; + + rk[0] = get_unaligned_be32(&key[0]) ^ fk[0]; + rk[1] = get_unaligned_be32(&key[1]) ^ fk[1]; + rk[2] = get_unaligned_be32(&key[2]) ^ fk[2]; + rk[3] = get_unaligned_be32(&key[3]) ^ fk[3]; + + for (i = 0; i < 32; i += 4) { + rk[0] ^= sm4_key_sub(rk[1] ^ rk[2] ^ rk[3] ^ ck[i + 0]); + rk[1] ^= sm4_key_sub(rk[2] ^ rk[3] ^ rk[0] ^ ck[i + 1]); + rk[2] ^= sm4_key_sub(rk[3] ^ rk[0] ^ rk[1] ^ ck[i + 2]); + rk[3] ^= sm4_key_sub(rk[0] ^ rk[1] ^ rk[2] ^ ck[i + 3]); + + ctx->rkey_enc[i + 0] = rk[0]; + ctx->rkey_enc[i + 1] = rk[1]; + ctx->rkey_enc[i + 2] = rk[2]; + ctx->rkey_enc[i + 3] = rk[3]; + ctx->rkey_dec[31 - 0 - i] = rk[0]; + ctx->rkey_dec[31 - 1 - i] = rk[1]; + ctx->rkey_dec[31 - 2 - i] = rk[2]; + ctx->rkey_dec[31 - 3 - i] = rk[3]; + } + + return 0; +} +EXPORT_SYMBOL_GPL(sm4_expandkey); + +/** + * sm4_crypt_block - Encrypt or decrypt a single SM4 block + * @rk: The rkey_enc for encrypt or rkey_dec for decrypt + * @out: Buffer to store output data + * @in: Buffer containing the input data + */ +void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in) +{ + u32 x[4], i; + + x[0] = get_unaligned_be32(in + 0 * 4); + x[1] = get_unaligned_be32(in + 1 * 4); + x[2] = get_unaligned_be32(in + 2 * 4); + x[3] = get_unaligned_be32(in + 3 * 4); + + for (i = 0; i < 32; i += 4) { + x[0] = sm4_round(x[0], x[1], x[2], x[3], rk[i + 0]); + x[1] = sm4_round(x[1], x[2], x[3], x[0], rk[i + 1]); + x[2] = sm4_round(x[2], x[3], x[0], x[1], rk[i + 2]); + x[3] = sm4_round(x[3], x[0], x[1], x[2], rk[i + 3]); + } + + put_unaligned_be32(x[3 - 0], out + 0 * 4); + put_unaligned_be32(x[3 - 1], out + 1 * 4); + put_unaligned_be32(x[3 - 2], out + 2 * 4); + put_unaligned_be32(x[3 - 3], out + 3 * 4); +} +EXPORT_SYMBOL_GPL(sm4_crypt_block); + +MODULE_DESCRIPTION("Generic SM4 library"); +MODULE_LICENSE("GPL v2"); |