--- /dev/null
+#
+# SSLeay/fips/dh/Makefile
+#
+
+DIR= dh
+TOP= ../..
+CC= cc
+INCLUDES=
+CFLAG=-g
+INSTALL_PREFIX=
+OPENSSLDIR= /usr/local/ssl
+INSTALLTOP=/usr/local/ssl
+MAKEDEPPROG= makedepend
+MAKEDEPEND= $(TOP)/util/domd $(TOP) -MD $(MAKEDEPPROG)
+MAKEFILE= Makefile
+AR= ar r
+
+CFLAGS= $(INCLUDES) $(CFLAG)
+
+GENERAL=Makefile
+TEST=
+APPS=
+
+LIB=$(TOP)/libcrypto.a
+LIBSRC=fips_dh_check.c fips_dh_gen.c fips_dh_key.c
+LIBOBJ=fips_dh_check.o fips_dh_gen.o fips_dh_key.o
+
+SRC= $(LIBSRC)
+
+EXHEADER=
+HEADER= $(EXHEADER)
+
+ALL= $(GENERAL) $(SRC) $(HEADER)
+
+top:
+ (cd $(TOP); $(MAKE) DIRS=fips FDIRS=$(DIR) sub_all)
+
+all: check lib
+
+lib: $(LIBOBJ)
+ $(AR) $(LIB) $(LIBOBJ)
+ $(RANLIB) $(LIB) || echo Never mind.
+ @sleep 2; touch lib
+
+check:
+ TOP=`pwd`/$(TOP) ../fips_check_sha1 fingerprint.sha1 $(SRC) $(HEADER)
+
+files:
+ $(PERL) $(TOP)/util/files.pl Makefile >> $(TOP)/MINFO
+
+links:
+ @$(PERL) $(TOP)/util/mklink.pl $(TOP)/include/openssl $(EXHEADER)
+ @$(PERL) $(TOP)/util/mklink.pl $(TOP)/test $(TEST)
+ @$(PERL) $(TOP)/util/mklink.pl $(TOP)/apps $(APPS)
+
+install:
+# some shells don't like empty lists
+# @for i in $(EXHEADER) ; \
+# do \
+# (cp $$i $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i; \
+# chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i ); \
+# done;
+
+tags:
+ ctags $(SRC)
+
+tests:
+
+lint:
+ lint -DLINT $(INCLUDES) $(SRC)>fluff
+
+depend:
+ $(MAKEDEPEND) -- $(CFLAG) $(INCLUDES) $(DEPFLAG) -- $(SRC) $(TEST)
+
+dclean:
+ $(PERL) -pe 'if (/^# DO NOT DELETE THIS LINE/) {print; exit(0);}' $(MAKEFILE) >Makefile.new
+ mv -f Makefile.new $(MAKEFILE)
+
+clean:
+ rm -f *.o *.obj lib tags core .pure .nfs* *.old *.bak fluff
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+fips_dh_gen.o: ../../include/openssl/bio.h ../../include/openssl/bn.h
+fips_dh_gen.o: ../../include/openssl/crypto.h ../../include/openssl/dh.h
+fips_dh_gen.o: ../../include/openssl/e_os2.h ../../include/openssl/err.h
+fips_dh_gen.o: ../../include/openssl/fips.h ../../include/openssl/lhash.h
+fips_dh_gen.o: ../../include/openssl/opensslconf.h
+fips_dh_gen.o: ../../include/openssl/opensslv.h
+fips_dh_gen.o: ../../include/openssl/ossl_typ.h
+fips_dh_gen.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
+fips_dh_gen.o: ../../include/openssl/symhacks.h fips_dh_gen.c
--- /dev/null
+HMAC-SHA1(fips_dh_check.c)= 5657cf7c136f6d9608df40d0699fe1d61d0ad5b5
+HMAC-SHA1(fips_dh_gen.c)= e3626ccd5124942cb19ca962470d2c3704d265bb
+HMAC-SHA1(fips_dh_key.c)= 88c882a9063c0b7e5f46de1a7bfa82f71e0a918e
--- /dev/null
+/* crypto/dh/dh_check.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+
+/* Check that p is a safe prime and
+ * if g is 2, 3 or 5, check that is is a suitable generator
+ * where
+ * for 2, p mod 24 == 11
+ * for 3, p mod 12 == 5
+ * for 5, p mod 10 == 3 or 7
+ * should hold.
+ */
+
+int DH_check(const DH *dh, int *ret)
+ {
+ int ok=0;
+ BN_CTX *ctx=NULL;
+ BN_ULONG l;
+ BIGNUM *q=NULL;
+
+ *ret=0;
+ ctx=BN_CTX_new();
+ if (ctx == NULL) goto err;
+ q=BN_new();
+ if (q == NULL) goto err;
+
+ if (BN_is_word(dh->g,DH_GENERATOR_2))
+ {
+ l=BN_mod_word(dh->p,24);
+ if (l != 11) *ret|=DH_NOT_SUITABLE_GENERATOR;
+ }
+#if 0
+ else if (BN_is_word(dh->g,DH_GENERATOR_3))
+ {
+ l=BN_mod_word(dh->p,12);
+ if (l != 5) *ret|=DH_NOT_SUITABLE_GENERATOR;
+ }
+#endif
+ else if (BN_is_word(dh->g,DH_GENERATOR_5))
+ {
+ l=BN_mod_word(dh->p,10);
+ if ((l != 3) && (l != 7))
+ *ret|=DH_NOT_SUITABLE_GENERATOR;
+ }
+ else
+ *ret|=DH_UNABLE_TO_CHECK_GENERATOR;
+
+ if (!BN_is_prime(dh->p,BN_prime_checks,NULL,ctx,NULL))
+ *ret|=DH_CHECK_P_NOT_PRIME;
+ else
+ {
+ if (!BN_rshift1(q,dh->p)) goto err;
+ if (!BN_is_prime(q,BN_prime_checks,NULL,ctx,NULL))
+ *ret|=DH_CHECK_P_NOT_SAFE_PRIME;
+ }
+ ok=1;
+err:
+ if (ctx != NULL) BN_CTX_free(ctx);
+ if (q != NULL) BN_free(q);
+ return(ok);
+ }
--- /dev/null
+/* crypto/dh/dh_gen.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <openssl/err.h>
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+#include <openssl/fips.h>
+
+/* We generate DH parameters as follows
+ * find a prime q which is prime_len/2 bits long.
+ * p=(2*q)+1 or (p-1)/2 = q
+ * For this case, g is a generator if
+ * g^((p-1)/q) mod p != 1 for values of q which are the factors of p-1.
+ * Since the factors of p-1 are q and 2, we just need to check
+ * g^2 mod p != 1 and g^q mod p != 1.
+ *
+ * Having said all that,
+ * there is another special case method for the generators 2, 3 and 5.
+ * for 2, p mod 24 == 11
+ * for 3, p mod 12 == 5 <<<<< does not work for safe primes.
+ * for 5, p mod 10 == 3 or 7
+ *
+ * Thanks to Phil Karn <karn@qualcomm.com> for the pointers about the
+ * special generators and for answering some of my questions.
+ *
+ * I've implemented the second simple method :-).
+ * Since DH should be using a safe prime (both p and q are prime),
+ * this generator function can take a very very long time to run.
+ */
+/* Actually there is no reason to insist that 'generator' be a generator.
+ * It's just as OK (and in some sense better) to use a generator of the
+ * order-q subgroup.
+ */
+
+#ifdef OPENSSL_FIPS
+
+DH *DH_generate_parameters(int prime_len, int generator,
+ void (*callback)(int,int,void *), void *cb_arg)
+ {
+ BIGNUM *p=NULL,*t1,*t2;
+ DH *ret=NULL;
+ int g,ok= -1;
+ BN_CTX *ctx=NULL;
+
+ if(FIPS_selftest_fail)
+ {
+ FIPSerr(FIPS_F_DH_GENERATE_PARAMETERS,FIPS_R_FIPS_SELFTEST_FAILED);
+ return NULL;
+ }
+
+ ret=DH_new();
+ if (ret == NULL) goto err;
+ ctx=BN_CTX_new();
+ if (ctx == NULL) goto err;
+ BN_CTX_start(ctx);
+ t1 = BN_CTX_get(ctx);
+ t2 = BN_CTX_get(ctx);
+ if (t1 == NULL || t2 == NULL) goto err;
+
+ if (generator <= 1)
+ {
+ DHerr(DH_F_DH_GENERATE_PARAMETERS, DH_R_BAD_GENERATOR);
+ goto err;
+ }
+ if (generator == DH_GENERATOR_2)
+ {
+ if (!BN_set_word(t1,24)) goto err;
+ if (!BN_set_word(t2,11)) goto err;
+ g=2;
+ }
+#if 0 /* does not work for safe primes */
+ else if (generator == DH_GENERATOR_3)
+ {
+ if (!BN_set_word(t1,12)) goto err;
+ if (!BN_set_word(t2,5)) goto err;
+ g=3;
+ }
+#endif
+ else if (generator == DH_GENERATOR_5)
+ {
+ if (!BN_set_word(t1,10)) goto err;
+ if (!BN_set_word(t2,3)) goto err;
+ /* BN_set_word(t3,7); just have to miss
+ * out on these ones :-( */
+ g=5;
+ }
+ else
+ {
+ /* in the general case, don't worry if 'generator' is a
+ * generator or not: since we are using safe primes,
+ * it will generate either an order-q or an order-2q group,
+ * which both is OK */
+ if (!BN_set_word(t1,2)) goto err;
+ if (!BN_set_word(t2,1)) goto err;
+ g=generator;
+ }
+
+ p=BN_generate_prime(NULL,prime_len,1,t1,t2,callback,cb_arg);
+ if (p == NULL) goto err;
+ if (callback != NULL) callback(3,0,cb_arg);
+ ret->p=p;
+ ret->g=BN_new();
+ if (!BN_set_word(ret->g,g)) goto err;
+ ok=1;
+err:
+ if (ok == -1)
+ {
+ DHerr(DH_F_DH_GENERATE_PARAMETERS,ERR_R_BN_LIB);
+ ok=0;
+ }
+
+ if (ctx != NULL)
+ {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
+ if (!ok && (ret != NULL))
+ {
+ DH_free(ret);
+ ret=NULL;
+ }
+ return(ret);
+ }
+
+#endif
--- /dev/null
+/* crypto/dh/dh_key.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <openssl/err.h>
+#include <openssl/bn.h>
+#include <openssl/rand.h>
+#include <openssl/dh.h>
+
+static int generate_key(DH *dh);
+static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
+static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
+ const BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx);
+static int dh_init(DH *dh);
+static int dh_finish(DH *dh);
+
+int DH_generate_key(DH *dh)
+ {
+ return dh->meth->generate_key(dh);
+ }
+
+int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+ {
+ return dh->meth->compute_key(key, pub_key, dh);
+ }
+
+static DH_METHOD dh_ossl = {
+"OpenSSL DH Method",
+generate_key,
+compute_key,
+dh_bn_mod_exp,
+dh_init,
+dh_finish,
+0,
+NULL
+};
+
+const DH_METHOD *DH_OpenSSL(void)
+{
+ return &dh_ossl;
+}
+
+static int generate_key(DH *dh)
+ {
+ int ok=0;
+ int generate_new_key=0;
+ unsigned l;
+ BN_CTX *ctx;
+ BN_MONT_CTX *mont;
+ BIGNUM *pub_key=NULL,*priv_key=NULL;
+
+ ctx = BN_CTX_new();
+ if (ctx == NULL) goto err;
+
+ if (dh->priv_key == NULL)
+ {
+ priv_key=BN_new();
+ if (priv_key == NULL) goto err;
+ generate_new_key=1;
+ }
+ else
+ priv_key=dh->priv_key;
+
+ if (dh->pub_key == NULL)
+ {
+ pub_key=BN_new();
+ if (pub_key == NULL) goto err;
+ }
+ else
+ pub_key=dh->pub_key;
+
+ if ((dh->method_mont_p == NULL) && (dh->flags & DH_FLAG_CACHE_MONT_P))
+ {
+ if ((dh->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)dh->method_mont_p,
+ dh->p,ctx)) goto err;
+ }
+ mont=(BN_MONT_CTX *)dh->method_mont_p;
+
+ if (generate_new_key)
+ {
+ l = dh->length ? dh->length : BN_num_bits(dh->p)-1; /* secret exponent length */
+ if (!BN_rand(priv_key, l, 0, 0)) goto err;
+ }
+ if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, priv_key,dh->p,ctx,mont))
+ goto err;
+
+ dh->pub_key=pub_key;
+ dh->priv_key=priv_key;
+ ok=1;
+err:
+ if (ok != 1)
+ DHerr(DH_F_DH_GENERATE_KEY,ERR_R_BN_LIB);
+
+ if ((pub_key != NULL) && (dh->pub_key == NULL)) BN_free(pub_key);
+ if ((priv_key != NULL) && (dh->priv_key == NULL)) BN_free(priv_key);
+ BN_CTX_free(ctx);
+ return(ok);
+ }
+
+static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+ {
+ BN_CTX *ctx;
+ BN_MONT_CTX *mont;
+ BIGNUM *tmp;
+ int ret= -1;
+
+ ctx = BN_CTX_new();
+ if (ctx == NULL) goto err;
+ BN_CTX_start(ctx);
+ tmp = BN_CTX_get(ctx);
+
+ if (dh->priv_key == NULL)
+ {
+ DHerr(DH_F_DH_COMPUTE_KEY,DH_R_NO_PRIVATE_VALUE);
+ goto err;
+ }
+ if ((dh->method_mont_p == NULL) && (dh->flags & DH_FLAG_CACHE_MONT_P))
+ {
+ if ((dh->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)dh->method_mont_p,
+ dh->p,ctx)) goto err;
+ }
+
+ mont=(BN_MONT_CTX *)dh->method_mont_p;
+ if (!dh->meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key,dh->p,ctx,mont))
+ {
+ DHerr(DH_F_DH_COMPUTE_KEY,ERR_R_BN_LIB);
+ goto err;
+ }
+
+ ret=BN_bn2bin(tmp,key);
+err:
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ return(ret);
+ }
+
+static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
+ const BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx)
+ {
+ if (a->top == 1)
+ {
+ BN_ULONG A = a->d[0];
+ return BN_mod_exp_mont_word(r,A,p,m,ctx,m_ctx);
+ }
+ else
+ return BN_mod_exp_mont(r,a,p,m,ctx,m_ctx);
+ }
+
+
+static int dh_init(DH *dh)
+ {
+ dh->flags |= DH_FLAG_CACHE_MONT_P;
+ return(1);
+ }
+
+static int dh_finish(DH *dh)
+ {
+ if(dh->method_mont_p)
+ BN_MONT_CTX_free((BN_MONT_CTX *)dh->method_mont_p);
+ return(1);
+ }
projects / openssl / commitdiff