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Commit 94f1bb15 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: rng - Remove old low-level rng interface 



Now that all rng implementations have switched over to the new
interface, we can remove the old low-level interface.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent e33cf2c5

crypto/rng.c

+4 −53
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 * RNG operations.

 *

 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>

 * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the Free
@@ -36,39 +37,6 @@ static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm) 
	return container_of(tfm, struct crypto_rng, base);

}



static inline struct old_rng_alg *crypto_old_rng_alg(struct crypto_rng *tfm)

{

	return &crypto_rng_tfm(tfm)->__crt_alg->cra_rng;

}



static int generate(struct crypto_rng *tfm, const u8 *src, unsigned int slen,

		    u8 *dst, unsigned int dlen)

{

	return crypto_old_rng_alg(tfm)->rng_make_random(tfm, dst, dlen);

}



static int rngapi_reset(struct crypto_rng *tfm, const u8 *seed,

			unsigned int slen)

{

	u8 *buf = NULL;

	u8 *src = (u8 *)seed;

	int err;



	if (slen) {

		buf = kmalloc(slen, GFP_KERNEL);

		if (!buf)

			return -ENOMEM;



		memcpy(buf, seed, slen);

		src = buf;

	}



	err = crypto_old_rng_alg(tfm)->rng_reset(tfm, src, slen);



	kzfree(buf);

	return err;

}



int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen)

{

	u8 *buf = NULL;
@@ -83,7 +51,7 @@ int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen) 
		seed = buf;

	}



	err = tfm->seed(tfm, seed, slen);

	err = crypto_rng_alg(tfm)->seed(tfm, seed, slen);



	kfree(buf);

	return err;
@@ -92,21 +60,6 @@ EXPORT_SYMBOL_GPL(crypto_rng_reset); 


static int crypto_rng_init_tfm(struct crypto_tfm *tfm)

{

	struct crypto_rng *rng = __crypto_rng_cast(tfm);

	struct rng_alg *alg = crypto_rng_alg(rng);

	struct old_rng_alg *oalg = crypto_old_rng_alg(rng);



	if (oalg->rng_make_random) {

		rng->generate = generate;

		rng->seed = rngapi_reset;

		rng->seedsize = oalg->seedsize;

		return 0;

	}



	rng->generate = alg->generate;

	rng->seed = alg->seed;

	rng->seedsize = alg->seedsize;



	return 0;

}
@@ -114,8 +67,7 @@ static unsigned int seedsize(struct crypto_alg *alg) 
{

	struct rng_alg *ralg = container_of(alg, struct rng_alg, base);



	return alg->cra_rng.rng_make_random ?

	       alg->cra_rng.seedsize : ralg->seedsize;

	return ralg->seedsize;

}



#ifdef CONFIG_NET
@@ -150,7 +102,7 @@ static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg) 
	seq_printf(m, "seedsize     : %u\n", seedsize(alg));

}



const struct crypto_type crypto_rng_type = {

static const struct crypto_type crypto_rng_type = {

	.extsize = crypto_alg_extsize,

	.init_tfm = crypto_rng_init_tfm,

#ifdef CONFIG_PROC_FS
@@ -162,7 +114,6 @@ const struct crypto_type crypto_rng_type = { 
	.type = CRYPTO_ALG_TYPE_RNG,

	.tfmsize = offsetof(struct crypto_rng, base),

};

EXPORT_SYMBOL_GPL(crypto_rng_type);



struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask)

{

include/crypto/internal/rng.h

+1 −2
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
 * RNG: Random Number Generator  algorithms under the crypto API

 *

 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>

 * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the Free
@@ -16,8 +17,6 @@ 
#include <crypto/algapi.h>

#include <crypto/rng.h>



extern const struct crypto_type crypto_rng_type;



int crypto_register_rng(struct rng_alg *alg);

void crypto_unregister_rng(struct rng_alg *alg);

int crypto_register_rngs(struct rng_alg *algs, int count);

include/crypto/rng.h

+3 −7
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
 * RNG: Random Number Generator  algorithms under the crypto API

 *

 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>

 * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the Free
@@ -56,11 +57,6 @@ struct rng_alg { 
};



struct crypto_rng {

	int (*generate)(struct crypto_rng *tfm,

			const u8 *src, unsigned int slen,

			u8 *dst, unsigned int dlen);

	int (*seed)(struct crypto_rng *tfm, const u8 *seed, unsigned int slen);

	unsigned int seedsize;

	struct crypto_tfm base;

};
@@ -144,7 +140,7 @@ static inline int crypto_rng_generate(struct crypto_rng *tfm, 
				      const u8 *src, unsigned int slen,

				      u8 *dst, unsigned int dlen)

{

	return tfm->generate(tfm, src, slen, dst, dlen);

	return crypto_rng_alg(tfm)->generate(tfm, src, slen, dst, dlen);

}



/**
@@ -198,7 +194,7 @@ int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, 
 */

static inline int crypto_rng_seedsize(struct crypto_rng *tfm)

{

	return tfm->seedsize;

	return crypto_rng_alg(tfm)->seedsize;

}



#endif

include/linux/crypto.h

+0 −30
Original line number Diff line number Diff line
@@ -138,7 +138,6 @@ struct crypto_async_request; 
struct crypto_aead;

struct crypto_blkcipher;

struct crypto_hash;

struct crypto_rng;

struct crypto_tfm;

struct crypto_type;

struct aead_givcrypt_request;
@@ -426,40 +425,12 @@ struct compress_alg { 
			      unsigned int slen, u8 *dst, unsigned int *dlen);

};



/**

 * struct old_rng_alg - random number generator definition

 * @rng_make_random: The function defined by this variable obtains a random

 *		     number. The random number generator transform must generate

 *		     the random number out of the context provided with this

 *		     call.

 * @rng_reset: Reset of the random number generator by clearing the entire state.

 *	       With the invocation of this function call, the random number

 *             generator shall completely reinitialize its state. If the random

 *	       number generator requires a seed for setting up a new state,

 *	       the seed must be provided by the consumer while invoking this

 *	       function. The required size of the seed is defined with

 *	       @seedsize .

 * @seedsize: The seed size required for a random number generator

 *	      initialization defined with this variable. Some random number

 *	      generators like the SP800-90A DRBG does not require a seed as the

 *	      seeding is implemented internally without the need of support by

 *	      the consumer. In this case, the seed size is set to zero.

 */

struct old_rng_alg {

	int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata,

			       unsigned int dlen);

	int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);



	unsigned int seedsize;

};





#define cra_ablkcipher	cra_u.ablkcipher

#define cra_aead	cra_u.aead

#define cra_blkcipher	cra_u.blkcipher

#define cra_cipher	cra_u.cipher

#define cra_compress	cra_u.compress

#define cra_rng		cra_u.rng



/**

 * struct crypto_alg - definition of a cryptograpic cipher algorithm
@@ -559,7 +530,6 @@ struct crypto_alg { 
		struct blkcipher_alg blkcipher;

		struct cipher_alg cipher;

		struct compress_alg compress;

		struct old_rng_alg rng;

	} cra_u;



	int (*cra_init)(struct crypto_tfm *tfm);