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: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 8 insertions, 92 deletions

diff --git a/crypto/rng.c b/crypto/rng.c
index e98ce1ca527d..055e276427b1 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -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)
 {
diff --git a/include/crypto/internal/rng.h b/include/crypto/internal/rng.h
index 2c9a865c66e2..263f1a5eebc7 100644
--- a/include/crypto/internal/rng.h
+++ b/include/crypto/internal/rng.h
@@ -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);
diff --git a/include/crypto/rng.h b/include/crypto/rng.h
index cc22e52a129a..c5d4684429f5 100644
--- a/include/crypto/rng.h
+++ b/include/crypto/rng.h
@@ -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
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 2fa9b05360f7..ee14140f8893 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -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);