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Commit 8da02bf1 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

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: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: default avatarGilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 9bae5494

crypto/sm4_generic.c

+6 −4
Original line number Diff line number Diff line
@@ -190,21 +190,23 @@ static void sm4_do_crypt(const u32 *rk, u32 *out, const u32 *in) 


/* 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);



	sm4_do_crypt(ctx->rkey_enc, (u32 *)out, (u32 *)in);

}

EXPORT_SYMBOL_GPL(crypto_sm4_encrypt);



/* 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);



	sm4_do_crypt(ctx->rkey_dec, (u32 *)out, (u32 *)in);

}

EXPORT_SYMBOL_GPL(crypto_sm4_decrypt);



static struct crypto_alg sm4_alg = {

	.cra_name		=	"sm4",
@@ -219,8 +221,8 @@ static struct crypto_alg sm4_alg = { 
			.cia_min_keysize	=	SM4_KEY_SIZE,

			.cia_max_keysize	=	SM4_KEY_SIZE,

			.cia_setkey		=	crypto_sm4_set_key,

			.cia_encrypt		=	sm4_encrypt,

			.cia_decrypt		=	sm4_decrypt

			.cia_encrypt		=	crypto_sm4_encrypt,

			.cia_decrypt		=	crypto_sm4_decrypt

		}

	}

};

include/crypto/sm4.h

+3 −0
Original line number Diff line number Diff line
@@ -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,

			  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