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/* fips/rand/fips_rand_lcl.h */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2011 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
* licensing@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.
* ====================================================================
*/
typedef struct drbg_hash_ctx_st DRBG_HASH_CTX;
typedef struct drbg_ctr_ctx_st DRBG_CTR_CTX;
/* 888 bits from 10.1 table 2 */
#define HASH_PRNG_MAX_SEEDLEN 111
struct drbg_hash_ctx_st
{
const EVP_MD *md;
EVP_MD_CTX mctx;
unsigned char V[HASH_PRNG_MAX_SEEDLEN];
unsigned char C[HASH_PRNG_MAX_SEEDLEN];
/* Temporary value storage: should always exceed max digest length */
unsigned char vtmp[HASH_PRNG_MAX_SEEDLEN];
};
struct drbg_ctr_ctx_st
{
AES_KEY ks;
size_t keylen;
unsigned char K[32];
unsigned char V[16];
/* Temp variables used by derivation function */
AES_KEY df_ks;
AES_KEY df_kxks;
/* Temporary block storage used by ctr_df */
unsigned char bltmp[16];
size_t bltmp_pos;
unsigned char KX[48];
};
/* DRBG flags */
/* PRNG is in test state */
#define DRBG_FLAG_TEST 0x2
/* Functions shouldn't call err library */
#define DRBG_FLAG_NOERR 0x4
/* DRBG status values */
/* not initialised */
#define DRBG_STATUS_UNINITIALISED 0
/* ok and ready to generate random bits */
#define DRBG_STATUS_READY 1
/* reseed required */
#define DRBG_STATUS_RESEED 2
/* fatal error condition */
#define DRBG_STATUS_ERROR 3
/* Maximum values for temp entropy and nonce */
#define DRBG_MAX_ENTROPY 1024
#define DRBG_MAX_NONCE 1024
/* A default maximum length: larger than any reasonable value used in pratice */
#define DRBG_MAX_LENGTH 0x7ffffff0
/* DRBG context structure */
struct drbg_ctx_st
{
/* First types common to all implementations */
/* DRBG type: a NID for the underlying algorithm */
int type;
/* Various flags */
unsigned int flags;
/* The following parameters are setup by mechanism drbg_init() call */
int strength;
size_t blocklength;
size_t max_request;
size_t min_entropy, max_entropy;
size_t min_nonce, max_nonce;
size_t max_pers, max_adin;
unsigned int reseed_counter;
unsigned int reseed_interval;
size_t seedlen;
int status;
/* Application data: typically used by test get_entropy */
void *app_data;
/* Implementation specific structures */
union
{
DRBG_HASH_CTX hash;
DRBG_CTR_CTX ctr;
} d;
/* Initialiase PRNG and setup callbacks below */
int (*init)(DRBG_CTX *ctx, int nid, int security, unsigned int flags);
/* Intantiate PRNG */
int (*instantiate)(DRBG_CTX *ctx,
const unsigned char *ent, size_t entlen,
const unsigned char *nonce, size_t noncelen,
const unsigned char *pers, size_t perslen);
/* reseed */
int (*reseed)(DRBG_CTX *ctx,
const unsigned char *ent, size_t entlen,
const unsigned char *adin, size_t adinlen);
/* generat output */
int (*generate)(DRBG_CTX *ctx,
unsigned char *out, size_t outlen,
const unsigned char *adin, size_t adinlen);
/* uninstantiate */
int (*uninstantiate)(DRBG_CTX *ctx);
unsigned char entropy[DRBG_MAX_ENTROPY];
/* entropy gathering function */
size_t (*get_entropy)(DRBG_CTX *ctx, unsigned char *out,
int entropy, size_t min_len, size_t max_len);
unsigned char nonce[DRBG_MAX_NONCE];
/* nonce gathering function */
size_t (*get_nonce)(DRBG_CTX *ctx, unsigned char *out,
int entropy, size_t min_len, size_t max_len);
/* Continuous random number test temporary area */
/* Last block */
unsigned char lb[16];
/* set if lb is valid */
int lb_valid;
};
int fips_drbg_ctr_init(DRBG_CTX *dctx);
int fips_drbg_hash_init(DRBG_CTX *dctx);
int fips_drbg_kat(DRBG_CTX *dctx, int nid, unsigned int flags);
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