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crypto: sm4 - export encrypt/decrypt routines to other drivers 

In preparation of adding support for the SIMD based arm64 implementation
of arm64, which requires a fallback to non-SIMD code when invoked in
certain contexts, expose the generic SM4 encrypt and decrypt routines
to other drivers.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-04-25 14:20:45 +02:00 committed by Herbert Xu
parent 9bae54942b
commit 8da02bf1a2
2 changed files with 9 additions and 4 deletions
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10
crypto/sm4_generic.c
View File

@ -190,21 +190,23 @@ static void sm4_do_crypt(const u32 *rk, u32 *out, const u32 *in)
/* encrypt a block of text */ /* encrypt a block of text */
static void sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) void crypto_sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{ {
const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
sm4_do_crypt(ctx->rkey_enc, (u32 *)out, (u32 *)in); sm4_do_crypt(ctx->rkey_enc, (u32 *)out, (u32 *)in);
} }
EXPORT_SYMBOL_GPL(crypto_sm4_encrypt);
/* decrypt a block of text */ /* decrypt a block of text */
static void sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) void crypto_sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{ {
const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
sm4_do_crypt(ctx->rkey_dec, (u32 *)out, (u32 *)in); sm4_do_crypt(ctx->rkey_dec, (u32 *)out, (u32 *)in);
} }
EXPORT_SYMBOL_GPL(crypto_sm4_decrypt);
static struct crypto_alg sm4_alg = { static struct crypto_alg sm4_alg = {
.cra_name = "sm4", .cra_name = "sm4",
@ -219,8 +221,8 @@ static struct crypto_alg sm4_alg = {
.cia_min_keysize = SM4_KEY_SIZE, .cia_min_keysize = SM4_KEY_SIZE,
.cia_max_keysize = SM4_KEY_SIZE, .cia_max_keysize = SM4_KEY_SIZE,
.cia_setkey = crypto_sm4_set_key, .cia_setkey = crypto_sm4_set_key,
.cia_encrypt = sm4_encrypt, .cia_encrypt = crypto_sm4_encrypt,
.cia_decrypt = sm4_decrypt .cia_decrypt = crypto_sm4_decrypt
} }
} }
}; };

3
include/crypto/sm4.h
View File

@ -25,4 +25,7 @@ int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key,
int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key, int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key,
unsigned int key_len); 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);
#endif #endif