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openssl/fips/rand/fips_rand.c

Index: openssl/fips/rand/fips_rand.c
===================================================================
--- openssl/fips/rand/fips_rand.c	(revision 105093)
+++ openssl/fips/rand/fips_rand.c	(working copy)
@@ -1,410 +0,0 @@
-/* ====================================================================
- * Copyright (c) 2007 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/*
- * This is a FIPS approved AES PRNG based on ANSI X9.31 A.2.4.
- */
-
-#include "e_os.h"
-
-/* If we don't define _XOPEN_SOURCE_EXTENDED, struct timeval won't
-   be defined and gettimeofday() won't be declared with strict compilers
-   like DEC C in ANSI C mode.  */
-#ifndef _XOPEN_SOURCE_EXTENDED
-#define _XOPEN_SOURCE_EXTENDED 1
-#endif
-
-#include <openssl/rand.h>
-#include <openssl/aes.h>
-#include <openssl/err.h>
-#include <openssl/fips_rand.h>
-#ifndef OPENSSL_SYS_WIN32
-#include <sys/time.h>
-#endif
-#include <assert.h>
-#ifndef OPENSSL_SYS_WIN32
-# ifdef OPENSSL_UNISTD
-#  include OPENSSL_UNISTD
-# else
-#  include <unistd.h>
-# endif
-#endif
-#include <string.h>
-#include <openssl/fips.h>
-#include "fips_locl.h"
-
-#ifdef OPENSSL_FIPS
-
-void *OPENSSL_stderr(void);
-
-#define AES_BLOCK_LENGTH	16
-
-
-/* AES FIPS PRNG implementation */
-
-typedef struct 
-	{
-	int seeded;
-	int keyed;
-	int test_mode;
-	int second;
-	int error;
-	unsigned long counter;
-	AES_KEY ks;
-	int vpos;
-	/* Temporary storage for key if it equals seed length */
-	unsigned char tmp_key[AES_BLOCK_LENGTH];
-	unsigned char V[AES_BLOCK_LENGTH];
-	unsigned char DT[AES_BLOCK_LENGTH];
-	unsigned char last[AES_BLOCK_LENGTH];
-	} FIPS_PRNG_CTX;
-
-static FIPS_PRNG_CTX sctx;
-
-static int fips_prng_fail = 0;
-
-void FIPS_rng_stick(void)
-	{
-	fips_prng_fail = 1;
-	}
-
-static void fips_rand_prng_reset(FIPS_PRNG_CTX *ctx)
-	{
-	ctx->seeded = 0;
-	ctx->keyed = 0;
-	ctx->test_mode = 0;
-	ctx->counter = 0;
-	ctx->second = 0;
-	ctx->error = 0;
-	ctx->vpos = 0;
-	OPENSSL_cleanse(ctx->V, AES_BLOCK_LENGTH);
-	OPENSSL_cleanse(&ctx->ks, sizeof(AES_KEY));
-	}
-	
-
-static int fips_set_prng_key(FIPS_PRNG_CTX *ctx,
-			const unsigned char *key, FIPS_RAND_SIZE_T keylen)
-	{
-	FIPS_selftest_check();
-	if (keylen != 16 && keylen != 24 && keylen != 32)
-		{
-		/* error: invalid key size */
-		return 0;
-		}
-	AES_set_encrypt_key(key, keylen << 3, &ctx->ks);
-	if (keylen == 16)
-		{
-		memcpy(ctx->tmp_key, key, 16);
-		ctx->keyed = 2;
-		}
-	else
-		ctx->keyed = 1;
-	ctx->seeded = 0;
-	ctx->second = 0;
-	return 1;
-	}
-
-static int fips_set_prng_seed(FIPS_PRNG_CTX *ctx,
-			const unsigned char *seed, FIPS_RAND_SIZE_T seedlen)
-	{
-	int i;
-	if (!ctx->keyed)
-		return 0;
-	/* In test mode seed is just supplied data */
-	if (ctx->test_mode)
-		{
-		if (seedlen != AES_BLOCK_LENGTH)
-			return 0;
-		memcpy(ctx->V, seed, AES_BLOCK_LENGTH);
-		ctx->seeded = 1;
-		return 1;
-		}
-	/* Outside test mode XOR supplied data with existing seed */
-	for (i = 0; i < seedlen; i++)
-		{
-		ctx->V[ctx->vpos++] ^= seed[i];
-		if (ctx->vpos == AES_BLOCK_LENGTH)
-			{
-			ctx->vpos = 0;
-			/* Special case if first seed and key length equals
- 			 * block size check key and seed do not match.
- 			 */ 
-			if (ctx->keyed == 2)
-				{
-				if (!memcmp(ctx->tmp_key, ctx->V, 16))
-					{
-					RANDerr(RAND_F_FIPS_SET_PRNG_SEED,
-						RAND_R_PRNG_SEED_MUST_NOT_MATCH_KEY);
-					return 0;
-					}
-				OPENSSL_cleanse(ctx->tmp_key, 16);
-				ctx->keyed = 1;
-				}
-			ctx->seeded = 1;
-			}
-		}
-	return 1;
-	}
-
-static int fips_set_test_mode(FIPS_PRNG_CTX *ctx)
-	{
-	if (ctx->keyed)
-		{
-		RANDerr(RAND_F_FIPS_SET_TEST_MODE,RAND_R_PRNG_KEYED);
-		return 0;
-		}
-	ctx->test_mode = 1;
-	return 1;
-	}
-
-int FIPS_rand_test_mode(void)
-	{
-	return fips_set_test_mode(&sctx);
-	}
-
-int FIPS_rand_set_dt(unsigned char *dt)
-	{
-	if (!sctx.test_mode)
-		{
-		RANDerr(RAND_F_FIPS_RAND_SET_DT,RAND_R_NOT_IN_TEST_MODE);
-		return 0;
-		}
-	memcpy(sctx.DT, dt, AES_BLOCK_LENGTH);
-	return 1;
-	}
-
-static void fips_get_dt(FIPS_PRNG_CTX *ctx)
-    {
-#ifdef OPENSSL_SYS_WIN32
-	FILETIME ft;
-#else
-	struct timeval tv;
-#endif
-	unsigned char *buf = ctx->DT;
-
-#ifndef GETPID_IS_MEANINGLESS
-	unsigned long pid;
-#endif
-
-#ifdef OPENSSL_SYS_WIN32
-	GetSystemTimeAsFileTime(&ft);
-	buf[0] = (unsigned char) (ft.dwHighDateTime & 0xff);
-	buf[1] = (unsigned char) ((ft.dwHighDateTime >> 8) & 0xff);
-	buf[2] = (unsigned char) ((ft.dwHighDateTime >> 16) & 0xff);
-	buf[3] = (unsigned char) ((ft.dwHighDateTime >> 24) & 0xff);
-	buf[4] = (unsigned char) (ft.dwLowDateTime & 0xff);
-	buf[5] = (unsigned char) ((ft.dwLowDateTime >> 8) & 0xff);
-	buf[6] = (unsigned char) ((ft.dwLowDateTime >> 16) & 0xff);
-	buf[7] = (unsigned char) ((ft.dwLowDateTime >> 24) & 0xff);
-#else
-	gettimeofday(&tv,NULL);
-	buf[0] = (unsigned char) (tv.tv_sec & 0xff);
-	buf[1] = (unsigned char) ((tv.tv_sec >> 8) & 0xff);
-	buf[2] = (unsigned char) ((tv.tv_sec >> 16) & 0xff);
-	buf[3] = (unsigned char) ((tv.tv_sec >> 24) & 0xff);
-	buf[4] = (unsigned char) (tv.tv_usec & 0xff);
-	buf[5] = (unsigned char) ((tv.tv_usec >> 8) & 0xff);
-	buf[6] = (unsigned char) ((tv.tv_usec >> 16) & 0xff);
-	buf[7] = (unsigned char) ((tv.tv_usec >> 24) & 0xff);
-#endif
-	buf[8] = (unsigned char) (ctx->counter & 0xff);
-	buf[9] = (unsigned char) ((ctx->counter >> 8) & 0xff);
-	buf[10] = (unsigned char) ((ctx->counter >> 16) & 0xff);
-	buf[11] = (unsigned char) ((ctx->counter >> 24) & 0xff);
-
-	ctx->counter++;
-
-
-#ifndef GETPID_IS_MEANINGLESS
-	pid=(unsigned long)getpid();
-	buf[12] = (unsigned char) (pid & 0xff);
-	buf[13] = (unsigned char) ((pid >> 8) & 0xff);
-	buf[14] = (unsigned char) ((pid >> 16) & 0xff);
-	buf[15] = (unsigned char) ((pid >> 24) & 0xff);
-#endif
-    }
-
-static int fips_rand(FIPS_PRNG_CTX *ctx,
-			unsigned char *out, FIPS_RAND_SIZE_T outlen)
-	{
-	unsigned char R[AES_BLOCK_LENGTH], I[AES_BLOCK_LENGTH];
-	unsigned char tmp[AES_BLOCK_LENGTH];
-	int i;
-	if (ctx->error)
-		{
-		RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_ERROR);
-		return 0;
-		}
-	if (!ctx->keyed)
-		{
-		RANDerr(RAND_F_FIPS_RAND,RAND_R_NO_KEY_SET);
-		return 0;
-		}
-	if (!ctx->seeded)
-		{
-		RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_NOT_SEEDED);
-		return 0;
-		}
-	for (;;)
-		{
-		if (!ctx->test_mode)
-			fips_get_dt(ctx);
-		AES_encrypt(ctx->DT, I, &ctx->ks);
-		for (i = 0; i < AES_BLOCK_LENGTH; i++)
-			tmp[i] = I[i] ^ ctx->V[i];
-		AES_encrypt(tmp, R, &ctx->ks);
-		for (i = 0; i < AES_BLOCK_LENGTH; i++)
-			tmp[i] = R[i] ^ I[i];
-		AES_encrypt(tmp, ctx->V, &ctx->ks);
-		/* Continuous PRNG test */
-		if (ctx->second)
-			{
-			if (fips_prng_fail)
-				memcpy(ctx->last, R, AES_BLOCK_LENGTH);
-			if (!memcmp(R, ctx->last, AES_BLOCK_LENGTH))
-				{
-	    			RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_STUCK);
-				ctx->error = 1;
-				fips_set_selftest_fail();
-				return 0;
-				}
-			}
-		memcpy(ctx->last, R, AES_BLOCK_LENGTH);
-		if (!ctx->second)
-			{
-			ctx->second = 1;
-			if (!ctx->test_mode)
-				continue;
-			}
-
-		if (outlen <= AES_BLOCK_LENGTH)
-			{
-			memcpy(out, R, outlen);
-			break;
-			}
-
-		memcpy(out, R, AES_BLOCK_LENGTH);
-		out += AES_BLOCK_LENGTH;
-		outlen -= AES_BLOCK_LENGTH;
-		}
-	return 1;
-	}
-
-
-int FIPS_rand_set_key(const unsigned char *key, FIPS_RAND_SIZE_T keylen)
-	{
-	int ret;
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-	ret = fips_set_prng_key(&sctx, key, keylen);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-	return ret;
-	}
-
-int FIPS_rand_seed(const void *seed, FIPS_RAND_SIZE_T seedlen)
-	{
-	int ret;
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-	ret = fips_set_prng_seed(&sctx, seed, seedlen);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-	return ret;
-	}
-
-
-int FIPS_rand_bytes(unsigned char *out, FIPS_RAND_SIZE_T count)
-	{
-	int ret;
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-	ret = fips_rand(&sctx, out, count);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-	return ret;
-	}
-
-int FIPS_rand_status(void)
-	{
-	int ret;
-	CRYPTO_r_lock(CRYPTO_LOCK_RAND);
-	ret = sctx.seeded;
-	CRYPTO_r_unlock(CRYPTO_LOCK_RAND);
-	return ret;
-	}
-
-void FIPS_rand_reset(void)
-	{
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-	fips_rand_prng_reset(&sctx);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-	}
-
-static void fips_do_rand_seed(const void *seed, FIPS_RAND_SIZE_T seedlen)
-	{
-	FIPS_rand_seed(seed, seedlen);
-	}
-
-static void fips_do_rand_add(const void *seed, FIPS_RAND_SIZE_T seedlen,
-					double add_entropy)
-	{
-	FIPS_rand_seed(seed, seedlen);
-	}
-
-static const RAND_METHOD rand_fips_meth=
-    {
-    fips_do_rand_seed,
-    FIPS_rand_bytes,
-    FIPS_rand_reset,
-    fips_do_rand_add,
-    FIPS_rand_bytes,
-    FIPS_rand_status
-    };
-
-const RAND_METHOD *FIPS_rand_method(void)
-{
-  return &rand_fips_meth;
-}
-
-#endif