Backport from HEAD:

New option to disable characteristic two fields in EC code.

Make no-ec2m work on Win32 build.

3 files changed, 11 insertions, 4 deletions

diff --git a/crypto/bn/bn.h b/crypto/bn/bn.h
index dc4fec4616..f34248ec4f 100644
--- a/crypto/bn/bn.h
+++ b/crypto/bn/bn.h
@@ -623,6 +623,8 @@ int	BN_mod_exp_recp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 int	BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
 	BN_RECP_CTX *recp, BN_CTX *ctx);
 
+#ifndef OPENSSL_NO_EC2M
+
 /* Functions for arithmetic over binary polynomials represented by BIGNUMs. 
  *
  * The BIGNUM::neg property of BIGNUMs representing binary polynomials is
@@ -674,6 +676,8 @@ int	BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a,
 int	BN_GF2m_poly2arr(const BIGNUM *a, int p[], int max);
 int	BN_GF2m_arr2poly(const int p[], BIGNUM *a);
 
+#endif
+
 /* faster mod functions for the 'NIST primes' 
  * 0 <= a < p^2 */
 int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
diff --git a/crypto/bn/bn_gf2m.c b/crypto/bn/bn_gf2m.c
index 527b0fa15b..3bf017feda 100644
--- a/crypto/bn/bn_gf2m.c
+++ b/crypto/bn/bn_gf2m.c
@@ -94,6 +94,8 @@
 #include "cryptlib.h"
 #include "bn_lcl.h"
 
+#ifndef OPENSSL_NO_EC2M
+
 /* Maximum number of iterations before BN_GF2m_mod_solve_quad_arr should fail. */
 #define MAX_ITERATIONS 50
 
@@ -1032,3 +1034,4 @@ int BN_GF2m_arr2poly(const int p[], BIGNUM *a)
 	return 1;
 	}
 
+#endif
diff --git a/crypto/bn/bntest.c b/crypto/bn/bntest.c
index 0cd99c5b4b..06f5954acc 100644
--- a/crypto/bn/bntest.c
+++ b/crypto/bn/bntest.c
@@ -262,7 +262,7 @@ int main(int argc, char *argv[])
 	message(out,"BN_mod_sqrt");
 	if (!test_sqrt(out,ctx)) goto err;
 	(void)BIO_flush(out);
-
+#ifndef OPENSSL_NO_EC2M
 	message(out,"BN_GF2m_add");
 	if (!test_gf2m_add(out)) goto err;
 	(void)BIO_flush(out);
@@ -298,7 +298,7 @@ int main(int argc, char *argv[])
 	message(out,"BN_GF2m_mod_solve_quad");
 	if (!test_gf2m_mod_solve_quad(out,ctx)) goto err;
 	(void)BIO_flush(out);
-
+#endif
 	BN_CTX_free(ctx);
 	BIO_free(out);
 
@@ -1061,7 +1061,7 @@ int test_exp(BIO *bp, BN_CTX *ctx)
 	BN_free(one);
 	return(1);
 	}
-
+#ifndef OPENSSL_NO_EC2M
 int test_gf2m_add(BIO *bp)
 	{
 	BIGNUM a,b,c;
@@ -1636,7 +1636,7 @@ int test_gf2m_mod_solve_quad(BIO *bp,BN_CTX *ctx)
 	BN_free(e);
 	return ret;
 	}
-
+#endif
 static int genprime_cb(int p, int n, BN_GENCB *arg)
 	{
 	char c='*';