Commit 3b43568d authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Revert "Remove Dual EC DRBG from FIPS module." 

Revert Dual EC DRBG removal commit as it was not accepted for 2.0.7
version of the module.

This reverts commit 200f249b.
parent 2659a2aa

fips/fips_test_suite.c

+12 −0
Changes for fips/fips_test_suite.c: 12 added lines, 0 removed lines.
Original line number Diff line number Diff line
@@ -714,6 +714,18 @@ static int do_drbg_all(void) 
		{NID_aes_128_ctr, DRBG_FLAG_CTR_USE_DF},

		{NID_aes_192_ctr, DRBG_FLAG_CTR_USE_DF},

		{NID_aes_256_ctr, DRBG_FLAG_CTR_USE_DF},

		{(NID_X9_62_prime256v1 << 16)|NID_sha1, 0},

		{(NID_X9_62_prime256v1 << 16)|NID_sha224, 0},

		{(NID_X9_62_prime256v1 << 16)|NID_sha256, 0},

		{(NID_X9_62_prime256v1 << 16)|NID_sha384, 0},

		{(NID_X9_62_prime256v1 << 16)|NID_sha512, 0},

		{(NID_secp384r1 << 16)|NID_sha224, 0},

		{(NID_secp384r1 << 16)|NID_sha256, 0},

		{(NID_secp384r1 << 16)|NID_sha384, 0},

		{(NID_secp384r1 << 16)|NID_sha512, 0},

		{(NID_secp521r1 << 16)|NID_sha256, 0},

		{(NID_secp521r1 << 16)|NID_sha384, 0},

		{(NID_secp521r1 << 16)|NID_sha512, 0},

		{0, 0}

	};

    DRBG_LIST *lst;

fips/fipsalgtest.pl

+1 −0
Changes for fips/fipsalgtest.pl: 1 added line, 0 removed lines.
Original line number Diff line number Diff line
@@ -434,6 +434,7 @@ my @fips_drbg_test_list = ( 
    # SP800-90 DRBG tests

    "SP800-90 DRBG",

    [ "CTR_DRBG",   "fips_drbgvs" ],

    [ "Dual_EC_DRBG",   "fips_drbgvs" ],

    [ "Hash_DRBG",  "fips_drbgvs" ],

    [ "HMAC_DRBG",  "fips_drbgvs" ]

fips/rand/Makefile

+14 −2
Changes for fips/rand/Makefile: 14 added lines, 2 removed lines.
Original line number Diff line number Diff line
@@ -23,10 +23,10 @@ APPS= 


LIB=$(TOP)/libcrypto.a

LIBSRC=	fips_rand.c fips_rand_selftest.c fips_drbg_lib.c \

	fips_drbg_hash.c fips_drbg_hmac.c fips_drbg_ctr.c \

	fips_drbg_hash.c fips_drbg_hmac.c fips_drbg_ctr.c fips_drbg_ec.c \

	fips_drbg_selftest.c fips_drbg_rand.c fips_rand_lib.c

LIBOBJ=	fips_rand.o fips_rand_selftest.o fips_drbg_lib.o \

	fips_drbg_hash.o fips_drbg_hmac.o fips_drbg_ctr.o \

	fips_drbg_hash.o fips_drbg_hmac.o fips_drbg_ctr.o fips_drbg_ec.o \

	fips_drbg_selftest.o fips_drbg_rand.o fips_rand_lib.o



SRC= $(LIBSRC)
@@ -105,6 +105,18 @@ fips_drbg_ctr.o: ../../include/openssl/ossl_typ.h 
fips_drbg_ctr.o: ../../include/openssl/safestack.h

fips_drbg_ctr.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h

fips_drbg_ctr.o: fips_drbg_ctr.c fips_rand_lcl.h

fips_drbg_ec.o: ../../include/openssl/aes.h ../../include/openssl/asn1.h

fips_drbg_ec.o: ../../include/openssl/bio.h ../../include/openssl/bn.h

fips_drbg_ec.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h

fips_drbg_ec.o: ../../include/openssl/ec.h ../../include/openssl/evp.h

fips_drbg_ec.o: ../../include/openssl/fips.h ../../include/openssl/fips_rand.h

fips_drbg_ec.o: ../../include/openssl/hmac.h ../../include/openssl/obj_mac.h

fips_drbg_ec.o: ../../include/openssl/objects.h

fips_drbg_ec.o: ../../include/openssl/opensslconf.h

fips_drbg_ec.o: ../../include/openssl/opensslv.h

fips_drbg_ec.o: ../../include/openssl/ossl_typ.h

fips_drbg_ec.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h

fips_drbg_ec.o: ../../include/openssl/symhacks.h fips_drbg_ec.c fips_rand_lcl.h

fips_drbg_hash.o: ../../include/openssl/aes.h ../../include/openssl/asn1.h

fips_drbg_hash.o: ../../include/openssl/bio.h ../../include/openssl/crypto.h

fips_drbg_hash.o: ../../include/openssl/e_os2.h ../../include/openssl/ec.h

fips/rand/fips_drbg_ec.c

0 → 100644
+542 −0
Changes for fips/rand/fips_drbg_ec.c: 542 added lines, 0 removed lines.
Original line number Diff line number Diff line 
/* fips/rand/fips_drbg_ec.c */

/* 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.

 * ====================================================================

 */



#define OPENSSL_FIPSAPI



#include <stdlib.h>

#include <string.h>

#include <openssl/crypto.h>

#include <openssl/fips.h>

#include <openssl/fips_rand.h>

#include <openssl/bn.h>

#include "fips_rand_lcl.h"



/*#define EC_DRBG_TRACE*/



#ifdef EC_DRBG_TRACE

static void hexprint(FILE *out, const unsigned char *buf, int buflen)

	{

	int i;

	fprintf(out, "\t");

	for (i = 0; i < buflen; i++)

		fprintf(out, "%02X", buf[i]);

	fprintf(out, "\n");

	}

static void bnprint(FILE *out, const char *name, const BIGNUM *b)

	{

	unsigned char *tmp;

	int len;

	len = BN_num_bytes(b);

	tmp = OPENSSL_malloc(len);

	BN_bn2bin(b, tmp);

	fprintf(out, "%s\n", name);

	hexprint(out, tmp, len);

	OPENSSL_free(tmp);

	}

#if 0

static void ecprint(FILE *out, EC_GROUP *grp, EC_POINT *pt)

	{

	BIGNUM *x, *y;

	x = BN_new();

	y = BN_new();

	EC_POINT_get_affine_coordinates_GFp(grp, pt, x, y, NULL);

	bnprint(out, "\tPoint X: ", x);

	bnprint(out, "\tPoint Y: ", y);

	BN_free(x);

	BN_free(y);

	}

#endif

#endif



/* This is Hash_df from SP 800-90 10.4.1 */



static int hash_df(DRBG_CTX *dctx, unsigned char *out,

			const unsigned char *in1, size_t in1len,

			const unsigned char *in2, size_t in2len,

			const unsigned char *in3, size_t in3len)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	EVP_MD_CTX *mctx = &ectx->mctx;

	unsigned char *vtmp = ectx->vtmp;

	unsigned char tmp[6];

	size_t mdlen = M_EVP_MD_size(ectx->md);

	/* Standard only ever needs seedlen bytes which is always less than

	 * maximum permitted so no need to check length.

	 */

	size_t outlen = dctx->seedlen;

	size_t nbits = (outlen << 3) - ectx->exbits;

	tmp[0] = 1;

	tmp[1] = (nbits >> 24) & 0xff;

	tmp[2] = (nbits >> 16) & 0xff;

	tmp[3] = (nbits >> 8) & 0xff;

	tmp[4] = nbits & 0xff;

	if (!in1)

		{

		tmp[5] = (unsigned char)in1len;

		in1 = tmp + 5;

		in1len = 1;

		}

	for (;;)

		{

		if (!FIPS_digestinit(mctx, ectx->md))

			return 0;

		if (!FIPS_digestupdate(mctx, tmp, 5))

			return 0;

		if (in1 && !FIPS_digestupdate(mctx, in1, in1len))

			return 0;

		if (in2 && !FIPS_digestupdate(mctx, in2, in2len))

			return 0;

		if (in3 && !FIPS_digestupdate(mctx, in3, in3len))

			return 0;

		if (outlen < mdlen)

			{

			if (!FIPS_digestfinal(mctx, vtmp, NULL))

				return 0;

			memcpy(out, vtmp, outlen);

			OPENSSL_cleanse(vtmp, mdlen);

			return 1;

			}

		else if(!FIPS_digestfinal(mctx, out, NULL))

			return 0;



		outlen -= mdlen;

		if (outlen == 0)

			return 1;

		tmp[0]++;

		out += mdlen;

		}

	}



static int bn2binpad(unsigned char *to, size_t tolen, BIGNUM *b)

	{

	size_t blen;

	blen = BN_num_bytes(b);

	/* If BIGNUM length greater than buffer, mask to get rightmost

	 * bytes. NB: modifies b but this doesn't matter for our purposes.

	 */

	if (blen > tolen)

		{

		BN_mask_bits(b, tolen << 3);

		/* Update length because mask operation might create leading

		 * zeroes.

		 */

		blen = BN_num_bytes(b);

		}

	/* If b length smaller than buffer pad with zeroes */

	if (blen < tolen)

		{

		memset(to, 0, tolen - blen);

		to += tolen - blen;

		}



	/* This call cannot fail */

	BN_bn2bin(b, to);

	return 1;

	}

/* Convert buffer to a BIGNUM discarding extra bits if necessary */

static int bin2bnbits(DRBG_CTX *dctx, BIGNUM *r, const unsigned char *buf)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	if (!BN_bin2bn(buf, dctx->seedlen, r))

		return 0;

	/* If we have extra bits right shift off the end of r */

	if (ectx->exbits)

		{

		if (!BN_rshift(r, r, ectx->exbits))

			return 0;

		}

	return 1;

	}



/* Calculate r = phi(s * P) or r= phi(s * Q) */



static int drbg_ec_mul(DRBG_EC_CTX *ectx, BIGNUM *r, const BIGNUM *s, int use_q)

	{

	if (use_q)

		{

		if (!EC_POINT_mul(ectx->curve, ectx->ptmp,

						NULL, ectx->Q, s, ectx->bctx))

			return 0;

		}

	else

		{

		if (!EC_POINT_mul(ectx->curve, ectx->ptmp,

						s, NULL, NULL, ectx->bctx))

			return 0;

		}

	/* Get x coordinate of result */

	if (!EC_POINT_get_affine_coordinates_GFp(ectx->curve, ectx->ptmp, r,

							NULL, ectx->bctx))

		return 0;

	return 1;

	}



static int drbg_ec_instantiate(DRBG_CTX *dctx,

				const unsigned char *ent, size_t ent_len,

				const unsigned char *nonce, size_t nonce_len,

				const unsigned char *pstr, size_t pstr_len)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	if (!hash_df(dctx, ectx->sbuf, 

			ent, ent_len, nonce, nonce_len, pstr, pstr_len))

		return 0;

	if (!bin2bnbits(dctx, ectx->s, ectx->sbuf))

		return 0;

	return 1;

	}



	

static int drbg_ec_reseed(DRBG_CTX *dctx,

				const unsigned char *ent, size_t ent_len,

				const unsigned char *adin, size_t adin_len)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	/* Convert s value to a binary buffer. Save it to tbuf as we are

	 * about to overwrite it.

	 */

	if (ectx->exbits)

		BN_lshift(ectx->s, ectx->s, ectx->exbits);

	bn2binpad(ectx->tbuf, dctx->seedlen, ectx->s);

	if (!hash_df(dctx, ectx->sbuf, ectx->tbuf, dctx->seedlen, 

			ent, ent_len, adin, adin_len))

		return 0;

	if (!bin2bnbits(dctx, ectx->s, ectx->sbuf))

		return 0;

	dctx->reseed_counter = 0;

	return 1;

	}



static int drbg_ec_generate(DRBG_CTX *dctx,

				unsigned char *out, size_t outlen,

				const unsigned char *adin, size_t adin_len)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	BIGNUM *t, *r;

	BIGNUM *s = ectx->s;

	/* special case: check reseed interval */

	if (out == NULL)

		{

		size_t nb = (outlen + dctx->blocklength - 1)/dctx->blocklength;

		if (dctx->reseed_counter + nb > dctx->reseed_interval)

			dctx->status = DRBG_STATUS_RESEED;

		return 1;

		}



	BN_CTX_start(ectx->bctx);

	r = BN_CTX_get(ectx->bctx);

	if (!r)

		goto err;

	if (adin && adin_len)

		{

		size_t i;

		t = BN_CTX_get(ectx->bctx);

		if (!t)

			goto err;

		/* Convert s to buffer */

		if (ectx->exbits)

			BN_lshift(s, s, ectx->exbits);

		bn2binpad(ectx->sbuf, dctx->seedlen, s);

		/* Step 2 */

		if (!hash_df(dctx, ectx->tbuf, adin, adin_len,

				NULL, 0, NULL, 0))

			goto err;

		/* Step 5 */

		for (i = 0; i < dctx->seedlen; i++)

			ectx->tbuf[i] ^= ectx->sbuf[i];

		if (!bin2bnbits(dctx, t, ectx->tbuf))

			return 0;

		}

	else

		/* Note if no additional input the algorithm never

		 * needs separate values for t and s.

		 */

		t = s;



#ifdef EC_DRBG_TRACE

	bnprint(stderr, "s at start of generate: ", s);

#endif



	for (;;)

		{

		/* Step #6, calculate s = t * P */

		if (!drbg_ec_mul(ectx, s, t, 0))

			goto err;

#ifdef EC_DRBG_TRACE

		bnprint(stderr, "s in generate: ", ectx->s);

#endif

		/* Step #7, calculate r = s * Q */

		if (!drbg_ec_mul(ectx, r, s, 1))

			goto err;

#ifdef EC_DRBG_TRACE

	bnprint(stderr, "r in generate is: ", r);

#endif

		dctx->reseed_counter++;

		/* Get rightmost bits of r to output buffer */



		if (!(dctx->xflags & DRBG_FLAG_TEST) && !dctx->lb_valid)

			{

			if (!bn2binpad(dctx->lb, dctx->blocklength, r))

				goto err;

			dctx->lb_valid = 1;

			continue;

			}

		if (outlen < dctx->blocklength)

			{

			if (!bn2binpad(ectx->vtmp, dctx->blocklength, r))

				goto err;

			if (!fips_drbg_cprng_test(dctx, ectx->vtmp))

				goto err;

			memcpy(out, ectx->vtmp, outlen);

			break;

			}

		else

			{

			if (!bn2binpad(out, dctx->blocklength, r))

				goto err;

			if (!fips_drbg_cprng_test(dctx, out))

				goto err;

			}	

		outlen -= dctx->blocklength;

		if (!outlen)

			break;

		out += dctx->blocklength;

		/* Step #5 after first pass */

		t = s;

#ifdef EC_DRBG_TRACE

		fprintf(stderr, "Random bits written:\n");

		hexprint(stderr, out, dctx->blocklength);

#endif

		}

	if (!drbg_ec_mul(ectx, ectx->s, ectx->s, 0))

		return 0;

#ifdef EC_DRBG_TRACE

	bnprint(stderr, "s after generate is: ", s);

#endif

	BN_CTX_end(ectx->bctx);

	return 1;

	err:

	BN_CTX_end(ectx->bctx);

	return 0;

	}



static int drbg_ec_uninstantiate(DRBG_CTX *dctx)

	{

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	EVP_MD_CTX_cleanup(&ectx->mctx);

	EC_GROUP_free(ectx->curve);

	EC_POINT_free(ectx->Q);

	EC_POINT_free(ectx->ptmp);

	BN_clear_free(ectx->s);

	BN_CTX_free(ectx->bctx);

	OPENSSL_cleanse(&dctx->d.ec, sizeof(DRBG_EC_CTX));

	return 1;

	}



/* Q points from SP 800-90 A.1, P is generator */



__fips_constseg

static const unsigned char p_256_qx[] = {

	0xc9,0x74,0x45,0xf4,0x5c,0xde,0xf9,0xf0,0xd3,0xe0,0x5e,0x1e,

	0x58,0x5f,0xc2,0x97,0x23,0x5b,0x82,0xb5,0xbe,0x8f,0xf3,0xef,

	0xca,0x67,0xc5,0x98,0x52,0x01,0x81,0x92

};

__fips_constseg

static const unsigned char p_256_qy[] = {

	0xb2,0x8e,0xf5,0x57,0xba,0x31,0xdf,0xcb,0xdd,0x21,0xac,0x46,

	0xe2,0xa9,0x1e,0x3c,0x30,0x4f,0x44,0xcb,0x87,0x05,0x8a,0xda,

	0x2c,0xb8,0x15,0x15,0x1e,0x61,0x00,0x46

};



__fips_constseg

static const unsigned char p_384_qx[] = {

	0x8e,0x72,0x2d,0xe3,0x12,0x5b,0xdd,0xb0,0x55,0x80,0x16,0x4b,

	0xfe,0x20,0xb8,0xb4,0x32,0x21,0x6a,0x62,0x92,0x6c,0x57,0x50,

	0x2c,0xee,0xde,0x31,0xc4,0x78,0x16,0xed,0xd1,0xe8,0x97,0x69,

	0x12,0x41,0x79,0xd0,0xb6,0x95,0x10,0x64,0x28,0x81,0x50,0x65

};

__fips_constseg

static const unsigned char p_384_qy[] = {

	0x02,0x3b,0x16,0x60,0xdd,0x70,0x1d,0x08,0x39,0xfd,0x45,0xee,

	0xc3,0x6f,0x9e,0xe7,0xb3,0x2e,0x13,0xb3,0x15,0xdc,0x02,0x61,

	0x0a,0xa1,0xb6,0x36,0xe3,0x46,0xdf,0x67,0x1f,0x79,0x0f,0x84,

	0xc5,0xe0,0x9b,0x05,0x67,0x4d,0xbb,0x7e,0x45,0xc8,0x03,0xdd

};



__fips_constseg

static const unsigned char p_521_qx[] = {

	0x01,0xb9,0xfa,0x3e,0x51,0x8d,0x68,0x3c,0x6b,0x65,0x76,0x36,

	0x94,0xac,0x8e,0xfb,0xae,0xc6,0xfa,0xb4,0x4f,0x22,0x76,0x17,

	0x1a,0x42,0x72,0x65,0x07,0xdd,0x08,0xad,0xd4,0xc3,0xb3,0xf4,

	0xc1,0xeb,0xc5,0xb1,0x22,0x2d,0xdb,0xa0,0x77,0xf7,0x22,0x94,

	0x3b,0x24,0xc3,0xed,0xfa,0x0f,0x85,0xfe,0x24,0xd0,0xc8,0xc0,

	0x15,0x91,0xf0,0xbe,0x6f,0x63

};

__fips_constseg

static const unsigned char p_521_qy[] = {

	0x01,0xf3,0xbd,0xba,0x58,0x52,0x95,0xd9,0xa1,0x11,0x0d,0x1d,

	0xf1,0xf9,0x43,0x0e,0xf8,0x44,0x2c,0x50,0x18,0x97,0x6f,0xf3,

	0x43,0x7e,0xf9,0x1b,0x81,0xdc,0x0b,0x81,0x32,0xc8,0xd5,0xc3,

	0x9c,0x32,0xd0,0xe0,0x04,0xa3,0x09,0x2b,0x7d,0x32,0x7c,0x0e,

	0x7a,0x4d,0x26,0xd2,0xc7,0xb6,0x9b,0x58,0xf9,0x06,0x66,0x52,

	0x91,0x1e,0x45,0x77,0x79,0xde

};



int fips_drbg_ec_init(DRBG_CTX *dctx)

	{

	const EVP_MD *md;

	const unsigned char *Q_x, *Q_y;

	BIGNUM *x, *y;

	size_t ptlen;

	int md_nid = dctx->type & 0xffff;

	int curve_nid = dctx->type >> 16;

	DRBG_EC_CTX *ectx = &dctx->d.ec;

	md = FIPS_get_digestbynid(md_nid);

	if (!md)

		return -2;



	/* These are taken from SP 800-90 10.3.1 table 4 */

	switch (curve_nid)

		{

		case NID_X9_62_prime256v1:

		dctx->strength = 128;

		dctx->seedlen = 32;

		dctx->blocklength = 30;

		ectx->exbits = 0;

		Q_x = p_256_qx;

		Q_y = p_256_qy;

		ptlen = sizeof(p_256_qx);

		break;



		case NID_secp384r1:

		if (md_nid == NID_sha1)

			return -2;

		dctx->strength = 192;

		dctx->seedlen = 48;

		dctx->blocklength = 46;

		ectx->exbits = 0;

		Q_x = p_384_qx;

		Q_y = p_384_qy;

		ptlen = sizeof(p_384_qx);

		break;



		case NID_secp521r1:

		if (md_nid == NID_sha1 || md_nid == NID_sha224)

			return -2;

		dctx->strength = 256;

		dctx->seedlen = 66;

		dctx->blocklength = 63;

		ectx->exbits = 7;

		Q_x = p_521_qx;

		Q_y = p_521_qy;

		ptlen = sizeof(p_521_qx);

		break;



		default:

		return -2;

		}



	dctx->iflags |= DRBG_CUSTOM_RESEED;

	dctx->reseed_counter = 0;

	dctx->instantiate = drbg_ec_instantiate;

	dctx->reseed = drbg_ec_reseed;

	dctx->generate = drbg_ec_generate;

	dctx->uninstantiate = drbg_ec_uninstantiate;



	ectx->md = md;

	EVP_MD_CTX_init(&ectx->mctx);



	dctx->min_entropy = dctx->strength / 8;

	dctx->max_entropy = 2 << 10;



	dctx->min_nonce = dctx->min_entropy / 2;

	dctx->max_nonce = 2 << 10;



	dctx->max_pers = 2 << 10;

	dctx->max_adin = 2 << 10;



	dctx->reseed_interval = 1<<24;

	dctx->max_request = dctx->reseed_interval * dctx->blocklength;



	/* Setup internal structures */

	ectx->bctx = BN_CTX_new();

	if (!ectx->bctx)

		return 0;

	BN_CTX_start(ectx->bctx);



	ectx->s = BN_new();



	ectx->curve = EC_GROUP_new_by_curve_name(curve_nid);



	ectx->Q = EC_POINT_new(ectx->curve);

	ectx->ptmp = EC_POINT_new(ectx->curve);



	x = BN_CTX_get(ectx->bctx);

	y = BN_CTX_get(ectx->bctx);



	if (!ectx->s || !ectx->curve || !ectx->Q || !y)

		goto err;



	if (!BN_bin2bn(Q_x, ptlen, x) || !BN_bin2bn(Q_y, ptlen, y))

		goto err;

	if (!EC_POINT_set_affine_coordinates_GFp(ectx->curve, ectx->Q,

							x, y, ectx->bctx))

		goto err;



	BN_CTX_end(ectx->bctx);



	return 1;

	err:

	BN_CTX_end(ectx->bctx);

	drbg_ec_uninstantiate(dctx);

	return 0;

	}

fips/rand/fips_drbg_lib.c

+2 −0
Changes for fips/rand/fips_drbg_lib.c: 2 added lines, 0 removed lines.
Original line number Diff line number Diff line
@@ -79,6 +79,8 @@ int FIPS_drbg_init(DRBG_CTX *dctx, int type, unsigned int flags) 
		rv = fips_drbg_ctr_init(dctx);

	if (rv == -2)

		rv = fips_drbg_hmac_init(dctx);

	if (rv == -2)

		rv = fips_drbg_ec_init(dctx);



	if (rv <= 0)

		{