From: tb <tb@openbsd.org>
Date: Sun, 18 Feb 2018 12:50:58 +0000 (+0000)
Subject: Provide DSA_set0_pqg.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=5c89949f5999a0ed6c32dad6950b30638a969537;p=openbsd

Provide DSA_set0_pqg.

ok jsing
---

diff --git a/lib/libcrypto/Symbols.list b/lib/libcrypto/Symbols.list
index aeafb88492e..79b2e946dc0 100644
--- a/lib/libcrypto/Symbols.list
+++ b/lib/libcrypto/Symbols.list
@@ -795,6 +795,7 @@ DSA_new
 DSA_new_method
 DSA_print
 DSA_print_fp
+DSA_set0_pqg
 DSA_set_default_method
 DSA_set_ex_data
 DSA_set_method
diff --git a/lib/libcrypto/dsa/dsa.h b/lib/libcrypto/dsa/dsa.h
index 608c15df6b2..21e5baa235e 100644
--- a/lib/libcrypto/dsa/dsa.h
+++ b/lib/libcrypto/dsa/dsa.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: dsa.h,v 1.24 2018/02/17 14:35:40 jsing Exp $ */
+/* $OpenBSD: dsa.h,v 1.25 2018/02/18 12:50:58 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -259,6 +259,7 @@ DH *DSA_dup_DH(const DSA *r);
 
 void DSA_get0_pqg(const DSA *d, const BIGNUM **p, const BIGNUM **q,
     const BIGNUM **g);
+int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 void DSA_get0_key(const DSA *d, const BIGNUM **pub_key, const BIGNUM **priv_key);
 
 #define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
diff --git a/lib/libcrypto/dsa/dsa_lib.c b/lib/libcrypto/dsa/dsa_lib.c
index ae9155c9f8c..2dec8567f5d 100644
--- a/lib/libcrypto/dsa/dsa_lib.c
+++ b/lib/libcrypto/dsa/dsa_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: dsa_lib.c,v 1.24 2018/02/17 13:47:36 tb Exp $ */
+/* $OpenBSD: dsa_lib.c,v 1.25 2018/02/18 12:50:58 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -315,6 +315,29 @@ DSA_get0_pqg(const DSA *d, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
 		*g = d->g;
 }
 
+int
+DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+	if ((d->p == NULL && p == NULL) || (d->q == NULL && q == NULL) ||
+	    (d->g == NULL && g == NULL))
+		return 0;
+
+	if (p != NULL) {
+		BN_free(d->p);
+		d->p = p;
+	}
+	if (q != NULL) {
+		BN_free(d->q);
+		d->q = q;
+	}
+	if (g != NULL) {
+		BN_free(d->g);
+		d->g = g;
+	}
+
+	return 1;
+}
+
 void
 DSA_get0_key(const DSA *d, const BIGNUM **pub_key, const BIGNUM **priv_key)
 {