crypto: rng - RNG interface and implementation
This patch adds a random number generator interface as well as a cryptographic pseudo-random number generator based on AES. It is meant to be used in cases where a deterministic CPRNG is required. One of the first applications will be as an input in the IPsec IV generation process. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Neil Horman
Herbert Xu
Родитель
ccb778e184
Коммит
17f0f4a47d
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@ -46,6 +46,10 @@ config CRYPTO_HASH
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tristate
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select CRYPTO_ALGAPI
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config CRYPTO_RNG
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tristate
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select CRYPTO_ALGAPI
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config CRYPTO_MANAGER
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tristate "Cryptographic algorithm manager"
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select CRYPTO_AEAD
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@ -689,6 +693,18 @@ config CRYPTO_LZO
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help
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This is the LZO algorithm.
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comment "Random Number Generation"
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config CRYPTO_ANSI_CPRNG
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tristate "Pseudo Random Number Generation for Cryptographic modules"
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select CRYPTO_AES
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select CRYPTO_RNG
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select CRYPTO_FIPS
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help
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This option enables the generic pseudo random number generator
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for cryptographic modules. Uses the Algorithm specified in
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ANSI X9.31 A.2.4
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source "drivers/crypto/Kconfig"
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endif # if CRYPTO
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@ -73,7 +73,9 @@ obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
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obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
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obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o
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obj-$(CONFIG_CRYPTO_LZO) += lzo.o
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obj-$(CONFIG_CRYPTO_RNG) += rng.o
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obj-$(CONFIG_CRYPTO_RNG) += krng.o
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obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
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obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
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#
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@ -0,0 +1,417 @@
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/*
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* PRNG: Pseudo Random Number Generator
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* Based on NIST Recommended PRNG From ANSI X9.31 Appendix A.2.4 using
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* AES 128 cipher
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*
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* (C) Neil Horman <nhorman@tuxdriver.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* any later version.
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*
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*
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*/
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#include <crypto/internal/rng.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/string.h>
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#include "internal.h"
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#define DEFAULT_PRNG_KEY "0123456789abcdef"
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#define DEFAULT_PRNG_KSZ 16
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#define DEFAULT_BLK_SZ 16
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#define DEFAULT_V_SEED "zaybxcwdveuftgsh"
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/*
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* Flags for the prng_context flags field
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*/
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#define PRNG_FIXED_SIZE 0x1
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#define PRNG_NEED_RESET 0x2
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/*
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* Note: DT is our counter value
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* I is our intermediate value
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* V is our seed vector
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* See http://csrc.nist.gov/groups/STM/cavp/documents/rng/931rngext.pdf
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* for implementation details
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*/
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struct prng_context {
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spinlock_t prng_lock;
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unsigned char rand_data[DEFAULT_BLK_SZ];
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unsigned char last_rand_data[DEFAULT_BLK_SZ];
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unsigned char DT[DEFAULT_BLK_SZ];
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unsigned char I[DEFAULT_BLK_SZ];
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unsigned char V[DEFAULT_BLK_SZ];
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u32 rand_data_valid;
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struct crypto_cipher *tfm;
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u32 flags;
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};
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static int dbg;
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static void hexdump(char *note, unsigned char *buf, unsigned int len)
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{
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if (dbg) {
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printk(KERN_CRIT "%s", note);
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print_hex_dump(KERN_CONT, "", DUMP_PREFIX_OFFSET,
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16, 1,
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buf, len, false);
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}
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}
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#define dbgprint(format, args...) do {\
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if (dbg)\
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printk(format, ##args);\
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} while (0)
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static void xor_vectors(unsigned char *in1, unsigned char *in2,
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unsigned char *out, unsigned int size)
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{
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int i;
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for (i = 0; i < size; i++)
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out[i] = in1[i] ^ in2[i];
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}
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/*
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* Returns DEFAULT_BLK_SZ bytes of random data per call
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* returns 0 if generation succeded, <0 if something went wrong
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*/
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static int _get_more_prng_bytes(struct prng_context *ctx)
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{
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int i;
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unsigned char tmp[DEFAULT_BLK_SZ];
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unsigned char *output = NULL;
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dbgprint(KERN_CRIT "Calling _get_more_prng_bytes for context %p\n",
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ctx);
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hexdump("Input DT: ", ctx->DT, DEFAULT_BLK_SZ);
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hexdump("Input I: ", ctx->I, DEFAULT_BLK_SZ);
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hexdump("Input V: ", ctx->V, DEFAULT_BLK_SZ);
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/*
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* This algorithm is a 3 stage state machine
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*/
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for (i = 0; i < 3; i++) {
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switch (i) {
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case 0:
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/*
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* Start by encrypting the counter value
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* This gives us an intermediate value I
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*/
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memcpy(tmp, ctx->DT, DEFAULT_BLK_SZ);
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output = ctx->I;
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hexdump("tmp stage 0: ", tmp, DEFAULT_BLK_SZ);
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break;
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case 1:
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/*
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* Next xor I with our secret vector V
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* encrypt that result to obtain our
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* pseudo random data which we output
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*/
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xor_vectors(ctx->I, ctx->V, tmp, DEFAULT_BLK_SZ);
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hexdump("tmp stage 1: ", tmp, DEFAULT_BLK_SZ);
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output = ctx->rand_data;
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break;
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case 2:
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/*
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* First check that we didn't produce the same
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* random data that we did last time around through this
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*/
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if (!memcmp(ctx->rand_data, ctx->last_rand_data,
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DEFAULT_BLK_SZ)) {
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printk(KERN_ERR
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"ctx %p Failed repetition check!\n",
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ctx);
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ctx->flags |= PRNG_NEED_RESET;
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return -EINVAL;
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}
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memcpy(ctx->last_rand_data, ctx->rand_data,
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DEFAULT_BLK_SZ);
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/*
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* Lastly xor the random data with I
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* and encrypt that to obtain a new secret vector V
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*/
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xor_vectors(ctx->rand_data, ctx->I, tmp,
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DEFAULT_BLK_SZ);
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output = ctx->V;
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hexdump("tmp stage 2: ", tmp, DEFAULT_BLK_SZ);
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break;
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}
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/* do the encryption */
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crypto_cipher_encrypt_one(ctx->tfm, output, tmp);
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}
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/*
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* Now update our DT value
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*/
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for (i = 0; i < DEFAULT_BLK_SZ; i++) {
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ctx->DT[i] += 1;
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if (ctx->DT[i] != 0)
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break;
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}
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dbgprint("Returning new block for context %p\n", ctx);
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ctx->rand_data_valid = 0;
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hexdump("Output DT: ", ctx->DT, DEFAULT_BLK_SZ);
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hexdump("Output I: ", ctx->I, DEFAULT_BLK_SZ);
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hexdump("Output V: ", ctx->V, DEFAULT_BLK_SZ);
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hexdump("New Random Data: ", ctx->rand_data, DEFAULT_BLK_SZ);
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return 0;
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}
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/* Our exported functions */
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static int get_prng_bytes(char *buf, size_t nbytes, struct prng_context *ctx)
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{
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unsigned long flags;
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unsigned char *ptr = buf;
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unsigned int byte_count = (unsigned int)nbytes;
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int err;
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if (nbytes < 0)
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return -EINVAL;
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spin_lock_irqsave(&ctx->prng_lock, flags);
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err = -EINVAL;
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if (ctx->flags & PRNG_NEED_RESET)
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goto done;
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/*
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* If the FIXED_SIZE flag is on, only return whole blocks of
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* pseudo random data
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*/
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err = -EINVAL;
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if (ctx->flags & PRNG_FIXED_SIZE) {
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if (nbytes < DEFAULT_BLK_SZ)
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goto done;
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byte_count = DEFAULT_BLK_SZ;
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}
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err = byte_count;
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dbgprint(KERN_CRIT "getting %d random bytes for context %p\n",
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byte_count, ctx);
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remainder:
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if (ctx->rand_data_valid == DEFAULT_BLK_SZ) {
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if (_get_more_prng_bytes(ctx) < 0) {
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memset(buf, 0, nbytes);
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err = -EINVAL;
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goto done;
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}
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}
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/*
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* Copy up to the next whole block size
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*/
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if (byte_count < DEFAULT_BLK_SZ) {
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for (; ctx->rand_data_valid < DEFAULT_BLK_SZ;
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ctx->rand_data_valid++) {
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*ptr = ctx->rand_data[ctx->rand_data_valid];
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ptr++;
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byte_count--;
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if (byte_count == 0)
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goto done;
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}
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}
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/*
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* Now copy whole blocks
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*/
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for (; byte_count >= DEFAULT_BLK_SZ; byte_count -= DEFAULT_BLK_SZ) {
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if (_get_more_prng_bytes(ctx) < 0) {
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memset(buf, 0, nbytes);
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err = -EINVAL;
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goto done;
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}
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memcpy(ptr, ctx->rand_data, DEFAULT_BLK_SZ);
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ctx->rand_data_valid += DEFAULT_BLK_SZ;
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ptr += DEFAULT_BLK_SZ;
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}
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/*
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* Now copy any extra partial data
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*/
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if (byte_count)
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goto remainder;
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done:
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spin_unlock_irqrestore(&ctx->prng_lock, flags);
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dbgprint(KERN_CRIT "returning %d from get_prng_bytes in context %p\n",
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err, ctx);
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return err;
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}
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static void free_prng_context(struct prng_context *ctx)
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{
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crypto_free_cipher(ctx->tfm);
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}
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static int reset_prng_context(struct prng_context *ctx,
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unsigned char *key, size_t klen,
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unsigned char *V, unsigned char *DT)
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{
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int ret;
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int rc = -EINVAL;
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unsigned char *prng_key;
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spin_lock(&ctx->prng_lock);
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ctx->flags |= PRNG_NEED_RESET;
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prng_key = (key != NULL) ? key : (unsigned char *)DEFAULT_PRNG_KEY;
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if (!key)
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klen = DEFAULT_PRNG_KSZ;
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if (V)
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memcpy(ctx->V, V, DEFAULT_BLK_SZ);
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else
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memcpy(ctx->V, DEFAULT_V_SEED, DEFAULT_BLK_SZ);
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if (DT)
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memcpy(ctx->DT, DT, DEFAULT_BLK_SZ);
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else
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memset(ctx->DT, 0, DEFAULT_BLK_SZ);
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memset(ctx->rand_data, 0, DEFAULT_BLK_SZ);
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memset(ctx->last_rand_data, 0, DEFAULT_BLK_SZ);
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if (ctx->tfm)
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crypto_free_cipher(ctx->tfm);
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ctx->tfm = crypto_alloc_cipher("aes", 0, 0);
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if (IS_ERR(ctx->tfm)) {
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dbgprint(KERN_CRIT "Failed to alloc tfm for context %p\n",
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ctx);
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ctx->tfm = NULL;
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goto out;
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}
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ctx->rand_data_valid = DEFAULT_BLK_SZ;
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ret = crypto_cipher_setkey(ctx->tfm, prng_key, klen);
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if (ret) {
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dbgprint(KERN_CRIT "PRNG: setkey() failed flags=%x\n",
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crypto_cipher_get_flags(ctx->tfm));
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crypto_free_cipher(ctx->tfm);
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goto out;
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}
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rc = 0;
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ctx->flags &= ~PRNG_NEED_RESET;
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out:
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spin_unlock(&ctx->prng_lock);
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return rc;
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}
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static int cprng_init(struct crypto_tfm *tfm)
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{
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struct prng_context *ctx = crypto_tfm_ctx(tfm);
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spin_lock_init(&ctx->prng_lock);
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return reset_prng_context(ctx, NULL, DEFAULT_PRNG_KSZ, NULL, NULL);
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}
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static void cprng_exit(struct crypto_tfm *tfm)
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{
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free_prng_context(crypto_tfm_ctx(tfm));
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}
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static int cprng_get_random(struct crypto_rng *tfm, u8 *rdata,
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unsigned int dlen)
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{
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struct prng_context *prng = crypto_rng_ctx(tfm);
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return get_prng_bytes(rdata, dlen, prng);
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}
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static int cprng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
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{
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struct prng_context *prng = crypto_rng_ctx(tfm);
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u8 *key = seed + DEFAULT_PRNG_KSZ;
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if (slen < DEFAULT_PRNG_KSZ + DEFAULT_BLK_SZ)
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return -EINVAL;
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reset_prng_context(prng, key, DEFAULT_PRNG_KSZ, seed, NULL);
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if (prng->flags & PRNG_NEED_RESET)
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return -EINVAL;
|
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return 0;
|
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}
|
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|
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static struct crypto_alg rng_alg = {
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.cra_name = "stdrng",
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.cra_driver_name = "ansi_cprng",
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.cra_priority = 100,
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.cra_flags = CRYPTO_ALG_TYPE_RNG,
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.cra_ctxsize = sizeof(struct prng_context),
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.cra_type = &crypto_rng_type,
|
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(rng_alg.cra_list),
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.cra_init = cprng_init,
|
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.cra_exit = cprng_exit,
|
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.cra_u = {
|
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.rng = {
|
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.rng_make_random = cprng_get_random,
|
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.rng_reset = cprng_reset,
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.seedsize = DEFAULT_PRNG_KSZ + DEFAULT_BLK_SZ,
|
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}
|
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}
|
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};
|
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|
||||
|
||||
/* Module initalization */
|
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static int __init prng_mod_init(void)
|
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{
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int ret = 0;
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||||
|
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if (fips_enabled)
|
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rng_alg.cra_priority += 200;
|
||||
|
||||
ret = crypto_register_alg(&rng_alg);
|
||||
|
||||
if (ret)
|
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goto out;
|
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out:
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit prng_mod_fini(void)
|
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{
|
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crypto_unregister_alg(&rng_alg);
|
||||
return;
|
||||
}
|
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|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Software Pseudo Random Number Generator");
|
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MODULE_AUTHOR("Neil Horman <nhorman@tuxdriver.com>");
|
||||
module_param(dbg, int, 0);
|
||||
MODULE_PARM_DESC(dbg, "Boolean to enable debugging (0/1 == off/on)");
|
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module_init(prng_mod_init);
|
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module_exit(prng_mod_fini);
|
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MODULE_ALIAS("stdrng");
|
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|
|
@ -0,0 +1,66 @@
|
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/*
|
||||
* RNG implementation using standard kernel RNG.
|
||||
*
|
||||
* Copyright (c) 2008 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 Software Foundation; either version 2 of the License, or (at your
|
||||
* any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <crypto/internal/rng.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/random.h>
|
||||
|
||||
static int krng_get_random(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen)
|
||||
{
|
||||
get_random_bytes(rdata, dlen);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int krng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct crypto_alg krng_alg = {
|
||||
.cra_name = "stdrng",
|
||||
.cra_driver_name = "krng",
|
||||
.cra_priority = 200,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_RNG,
|
||||
.cra_ctxsize = 0,
|
||||
.cra_type = &crypto_rng_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(krng_alg.cra_list),
|
||||
.cra_u = {
|
||||
.rng = {
|
||||
.rng_make_random = krng_get_random,
|
||||
.rng_reset = krng_reset,
|
||||
.seedsize = 0,
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/* Module initalization */
|
||||
static int __init krng_mod_init(void)
|
||||
{
|
||||
return crypto_register_alg(&krng_alg);
|
||||
}
|
||||
|
||||
static void __exit krng_mod_fini(void)
|
||||
{
|
||||
crypto_unregister_alg(&krng_alg);
|
||||
return;
|
||||
}
|
||||
|
||||
module_init(krng_mod_init);
|
||||
module_exit(krng_mod_fini);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Kernel Random Number Generator");
|
||||
MODULE_ALIAS("stdrng");
|
||||
|
|
@ -0,0 +1,126 @@
|
|||
/*
|
||||
* Cryptographic API.
|
||||
*
|
||||
* RNG operations.
|
||||
*
|
||||
* Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
|
||||
*
|
||||
* 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
|
||||
* Software Foundation; either version 2 of the License, or (at your option)
|
||||
* any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <asm/atomic.h>
|
||||
#include <crypto/internal/rng.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/random.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
static DEFINE_MUTEX(crypto_default_rng_lock);
|
||||
struct crypto_rng *crypto_default_rng;
|
||||
EXPORT_SYMBOL_GPL(crypto_default_rng);
|
||||
static int crypto_default_rng_refcnt;
|
||||
|
||||
static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen)
|
||||
{
|
||||
u8 *buf = NULL;
|
||||
int err;
|
||||
|
||||
if (!seed && slen) {
|
||||
buf = kmalloc(slen, GFP_KERNEL);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
get_random_bytes(buf, slen);
|
||||
seed = buf;
|
||||
}
|
||||
|
||||
err = crypto_rng_alg(tfm)->rng_reset(tfm, seed, slen);
|
||||
|
||||
kfree(buf);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int crypto_init_rng_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
|
||||
{
|
||||
struct rng_alg *alg = &tfm->__crt_alg->cra_rng;
|
||||
struct rng_tfm *ops = &tfm->crt_rng;
|
||||
|
||||
ops->rng_gen_random = alg->rng_make_random;
|
||||
ops->rng_reset = rngapi_reset;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
|
||||
__attribute__ ((unused));
|
||||
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
|
||||
{
|
||||
seq_printf(m, "type : rng\n");
|
||||
seq_printf(m, "seedsize : %u\n", alg->cra_rng.seedsize);
|
||||
}
|
||||
|
||||
static unsigned int crypto_rng_ctxsize(struct crypto_alg *alg, u32 type,
|
||||
u32 mask)
|
||||
{
|
||||
return alg->cra_ctxsize;
|
||||
}
|
||||
|
||||
const struct crypto_type crypto_rng_type = {
|
||||
.ctxsize = crypto_rng_ctxsize,
|
||||
.init = crypto_init_rng_ops,
|
||||
#ifdef CONFIG_PROC_FS
|
||||
.show = crypto_rng_show,
|
||||
#endif
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(crypto_rng_type);
|
||||
|
||||
int crypto_get_default_rng(void)
|
||||
{
|
||||
struct crypto_rng *rng;
|
||||
int err;
|
||||
|
||||
mutex_lock(&crypto_default_rng_lock);
|
||||
if (!crypto_default_rng) {
|
||||
rng = crypto_alloc_rng("stdrng", 0, 0);
|
||||
err = PTR_ERR(rng);
|
||||
if (IS_ERR(rng))
|
||||
goto unlock;
|
||||
|
||||
err = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
|
||||
if (err) {
|
||||
crypto_free_rng(rng);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
crypto_default_rng = rng;
|
||||
}
|
||||
|
||||
crypto_default_rng_refcnt++;
|
||||
err = 0;
|
||||
|
||||
unlock:
|
||||
mutex_unlock(&crypto_default_rng_lock);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(crypto_get_default_rng);
|
||||
|
||||
void crypto_put_default_rng(void)
|
||||
{
|
||||
mutex_lock(&crypto_default_rng_lock);
|
||||
if (!--crypto_default_rng_refcnt) {
|
||||
crypto_free_rng(crypto_default_rng);
|
||||
crypto_default_rng = NULL;
|
||||
}
|
||||
mutex_unlock(&crypto_default_rng_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(crypto_put_default_rng);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Random Number Genertor");
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
/*
|
||||
* RNG: Random Number Generator algorithms under the crypto API
|
||||
*
|
||||
* Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
|
||||
*
|
||||
* 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
|
||||
* Software Foundation; either version 2 of the License, or (at your option)
|
||||
* any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_INTERNAL_RNG_H
|
||||
#define _CRYPTO_INTERNAL_RNG_H
|
||||
|
||||
#include <crypto/algapi.h>
|
||||
#include <crypto/rng.h>
|
||||
|
||||
extern const struct crypto_type crypto_rng_type;
|
||||
|
||||
static inline void *crypto_rng_ctx(struct crypto_rng *tfm)
|
||||
{
|
||||
return crypto_tfm_ctx(&tfm->base);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
/*
|
||||
* RNG: Random Number Generator algorithms under the crypto API
|
||||
*
|
||||
* Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
|
||||
*
|
||||
* 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
|
||||
* Software Foundation; either version 2 of the License, or (at your option)
|
||||
* any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_RNG_H
|
||||
#define _CRYPTO_RNG_H
|
||||
|
||||
#include <linux/crypto.h>
|
||||
|
||||
extern struct crypto_rng *crypto_default_rng;
|
||||
|
||||
int crypto_get_default_rng(void);
|
||||
void crypto_put_default_rng(void);
|
||||
|
||||
static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm)
|
||||
{
|
||||
return (struct crypto_rng *)tfm;
|
||||
}
|
||||
|
||||
static inline struct crypto_rng *crypto_alloc_rng(const char *alg_name,
|
||||
u32 type, u32 mask)
|
||||
{
|
||||
type &= ~CRYPTO_ALG_TYPE_MASK;
|
||||
type |= CRYPTO_ALG_TYPE_RNG;
|
||||
mask |= CRYPTO_ALG_TYPE_MASK;
|
||||
|
||||
return __crypto_rng_cast(crypto_alloc_base(alg_name, type, mask));
|
||||
}
|
||||
|
||||
static inline struct crypto_tfm *crypto_rng_tfm(struct crypto_rng *tfm)
|
||||
{
|
||||
return &tfm->base;
|
||||
}
|
||||
|
||||
static inline struct rng_alg *crypto_rng_alg(struct crypto_rng *tfm)
|
||||
{
|
||||
return &crypto_rng_tfm(tfm)->__crt_alg->cra_rng;
|
||||
}
|
||||
|
||||
static inline struct rng_tfm *crypto_rng_crt(struct crypto_rng *tfm)
|
||||
{
|
||||
return &crypto_rng_tfm(tfm)->crt_rng;
|
||||
}
|
||||
|
||||
static inline void crypto_free_rng(struct crypto_rng *tfm)
|
||||
{
|
||||
crypto_free_tfm(crypto_rng_tfm(tfm));
|
||||
}
|
||||
|
||||
static inline int crypto_rng_get_bytes(struct crypto_rng *tfm,
|
||||
u8 *rdata, unsigned int dlen)
|
||||
{
|
||||
return crypto_rng_crt(tfm)->rng_gen_random(tfm, rdata, dlen);
|
||||
}
|
||||
|
||||
static inline int crypto_rng_reset(struct crypto_rng *tfm,
|
||||
u8 *seed, unsigned int slen)
|
||||
{
|
||||
return crypto_rng_crt(tfm)->rng_reset(tfm, seed, slen);
|
||||
}
|
||||
|
||||
static inline int crypto_rng_seedsize(struct crypto_rng *tfm)
|
||||
{
|
||||
return crypto_rng_alg(tfm)->seedsize;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -38,6 +38,7 @@
|
|||
#define CRYPTO_ALG_TYPE_DIGEST 0x00000008
|
||||
#define CRYPTO_ALG_TYPE_HASH 0x00000009
|
||||
#define CRYPTO_ALG_TYPE_AHASH 0x0000000a
|
||||
#define CRYPTO_ALG_TYPE_RNG 0x0000000c
|
||||
|
||||
#define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
|
||||
#define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000c
|
||||
|
|
@ -113,6 +114,7 @@ struct crypto_aead;
|
|||
struct crypto_blkcipher;
|
||||
struct crypto_hash;
|
||||
struct crypto_ahash;
|
||||
struct crypto_rng;
|
||||
struct crypto_tfm;
|
||||
struct crypto_type;
|
||||
struct aead_givcrypt_request;
|
||||
|
|
@ -298,6 +300,15 @@ struct compress_alg {
|
|||
unsigned int slen, u8 *dst, unsigned int *dlen);
|
||||
};
|
||||
|
||||
struct 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
|
||||
|
|
@ -306,6 +317,7 @@ struct compress_alg {
|
|||
#define cra_hash cra_u.hash
|
||||
#define cra_ahash cra_u.ahash
|
||||
#define cra_compress cra_u.compress
|
||||
#define cra_rng cra_u.rng
|
||||
|
||||
struct crypto_alg {
|
||||
struct list_head cra_list;
|
||||
|
|
@ -333,6 +345,7 @@ struct crypto_alg {
|
|||
struct hash_alg hash;
|
||||
struct ahash_alg ahash;
|
||||
struct compress_alg compress;
|
||||
struct rng_alg rng;
|
||||
} cra_u;
|
||||
|
||||
int (*cra_init)(struct crypto_tfm *tfm);
|
||||
|
|
@ -438,6 +451,12 @@ struct compress_tfm {
|
|||
u8 *dst, unsigned int *dlen);
|
||||
};
|
||||
|
||||
struct rng_tfm {
|
||||
int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata,
|
||||
unsigned int dlen);
|
||||
int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
|
||||
};
|
||||
|
||||
#define crt_ablkcipher crt_u.ablkcipher
|
||||
#define crt_aead crt_u.aead
|
||||
#define crt_blkcipher crt_u.blkcipher
|
||||
|
|
@ -445,6 +464,7 @@ struct compress_tfm {
|
|||
#define crt_hash crt_u.hash
|
||||
#define crt_ahash crt_u.ahash
|
||||
#define crt_compress crt_u.compress
|
||||
#define crt_rng crt_u.rng
|
||||
|
||||
struct crypto_tfm {
|
||||
|
||||
|
|
@ -458,6 +478,7 @@ struct crypto_tfm {
|
|||
struct hash_tfm hash;
|
||||
struct ahash_tfm ahash;
|
||||
struct compress_tfm compress;
|
||||
struct rng_tfm rng;
|
||||
} crt_u;
|
||||
|
||||
struct crypto_alg *__crt_alg;
|
||||
|
|
@ -489,6 +510,10 @@ struct crypto_hash {
|
|||
struct crypto_tfm base;
|
||||
};
|
||||
|
||||
struct crypto_rng {
|
||||
struct crypto_tfm base;
|
||||
};
|
||||
|
||||
enum {
|
||||
CRYPTOA_UNSPEC,
|
||||
CRYPTOA_ALG,
|
||||
|
|
|
|||
Загрузка…
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