From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/dh/dh_asn1.c | 138 +++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/dh/dh_asn1.c

(limited to 'openssl-1.1.0h/crypto/dh/dh_asn1.c')

diff --git a/openssl-1.1.0h/crypto/dh/dh_asn1.c b/openssl-1.1.0h/crypto/dh/dh_asn1.c
new file mode 100644
index 0000000..7c72fd6
--- /dev/null
+++ b/openssl-1.1.0h/crypto/dh/dh_asn1.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/bn.h>
+#include "dh_locl.h"
+#include <openssl/objects.h>
+#include <openssl/asn1t.h>
+
+/* Override the default free and new methods */
+static int dh_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
+                 void *exarg)
+{
+    if (operation == ASN1_OP_NEW_PRE) {
+        *pval = (ASN1_VALUE *)DH_new();
+        if (*pval != NULL)
+            return 2;
+        return 0;
+    } else if (operation == ASN1_OP_FREE_PRE) {
+        DH_free((DH *)*pval);
+        *pval = NULL;
+        return 2;
+    }
+    return 1;
+}
+
+ASN1_SEQUENCE_cb(DHparams, dh_cb) = {
+        ASN1_SIMPLE(DH, p, BIGNUM),
+        ASN1_SIMPLE(DH, g, BIGNUM),
+        ASN1_OPT(DH, length, ZLONG),
+} ASN1_SEQUENCE_END_cb(DH, DHparams)
+
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DH, DHparams, DHparams)
+
+/*
+ * Internal only structures for handling X9.42 DH: this gets translated to or
+ * from a DH structure straight away.
+ */
+
+typedef struct {
+    ASN1_BIT_STRING *seed;
+    BIGNUM *counter;
+} int_dhvparams;
+
+typedef struct {
+    BIGNUM *p;
+    BIGNUM *q;
+    BIGNUM *g;
+    BIGNUM *j;
+    int_dhvparams *vparams;
+} int_dhx942_dh;
+
+ASN1_SEQUENCE(DHvparams) = {
+        ASN1_SIMPLE(int_dhvparams, seed, ASN1_BIT_STRING),
+        ASN1_SIMPLE(int_dhvparams, counter, BIGNUM)
+} static_ASN1_SEQUENCE_END_name(int_dhvparams, DHvparams)
+
+ASN1_SEQUENCE(DHxparams) = {
+        ASN1_SIMPLE(int_dhx942_dh, p, BIGNUM),
+        ASN1_SIMPLE(int_dhx942_dh, g, BIGNUM),
+        ASN1_SIMPLE(int_dhx942_dh, q, BIGNUM),
+        ASN1_OPT(int_dhx942_dh, j, BIGNUM),
+        ASN1_OPT(int_dhx942_dh, vparams, DHvparams),
+} static_ASN1_SEQUENCE_END_name(int_dhx942_dh, DHxparams)
+
+int_dhx942_dh *d2i_int_dhx(int_dhx942_dh **a,
+                           const unsigned char **pp, long length);
+int i2d_int_dhx(const int_dhx942_dh *a, unsigned char **pp);
+
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(int_dhx942_dh, DHxparams, int_dhx)
+
+/* Application public function: read in X9.42 DH parameters into DH structure */
+
+DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length)
+{
+    int_dhx942_dh *dhx = NULL;
+    DH *dh = NULL;
+    dh = DH_new();
+    if (dh == NULL)
+        return NULL;
+    dhx = d2i_int_dhx(NULL, pp, length);
+    if (dhx == NULL) {
+        DH_free(dh);
+        return NULL;
+    }
+
+    if (a) {
+        DH_free(*a);
+        *a = dh;
+    }
+
+    dh->p = dhx->p;
+    dh->q = dhx->q;
+    dh->g = dhx->g;
+    dh->j = dhx->j;
+
+    if (dhx->vparams) {
+        dh->seed = dhx->vparams->seed->data;
+        dh->seedlen = dhx->vparams->seed->length;
+        dh->counter = dhx->vparams->counter;
+        dhx->vparams->seed->data = NULL;
+        ASN1_BIT_STRING_free(dhx->vparams->seed);
+        OPENSSL_free(dhx->vparams);
+        dhx->vparams = NULL;
+    }
+
+    OPENSSL_free(dhx);
+    return dh;
+}
+
+int i2d_DHxparams(const DH *dh, unsigned char **pp)
+{
+    int_dhx942_dh dhx;
+    int_dhvparams dhv;
+    ASN1_BIT_STRING bs;
+    dhx.p = dh->p;
+    dhx.g = dh->g;
+    dhx.q = dh->q;
+    dhx.j = dh->j;
+    if (dh->counter && dh->seed && dh->seedlen > 0) {
+        bs.flags = ASN1_STRING_FLAG_BITS_LEFT;
+        bs.data = dh->seed;
+        bs.length = dh->seedlen;
+        dhv.seed = &bs;
+        dhv.counter = dh->counter;
+        dhx.vparams = &dhv;
+    } else
+        dhx.vparams = NULL;
+
+    return i2d_int_dhx(&dhx, pp);
+}
-- 
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