1 files changed, 78 insertions, 0 deletions
diff --git a/crypto/ec/ec_deprecated.c b/crypto/ec/ec_deprecated.c
new file mode 100644
index 000000000000..765894c32977
--- /dev/null
+++ b/crypto/ec/ec_deprecated.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2002-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (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
+ */
+
+/*
+ * Suppress deprecation warnings for EC low level implementations that are
+ * kept until removal.
+ */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+#include <openssl/ec.h>
+
+#ifndef OPENSSL_NO_DEPRECATED_3_0
+BIGNUM *EC_POINT_point2bn(const EC_GROUP *group,
+                          const EC_POINT *point,
+                          point_conversion_form_t form,
+                          BIGNUM *ret, BN_CTX *ctx)
+{
+    size_t buf_len = 0;
+    unsigned char *buf;
+
+    buf_len = EC_POINT_point2buf(group, point, form, &buf, ctx);
+
+    if (buf_len == 0)
+        return NULL;
+
+    ret = BN_bin2bn(buf, buf_len, ret);
+
+    OPENSSL_free(buf);
+
+    return ret;
+}
+
+EC_POINT *EC_POINT_bn2point(const EC_GROUP *group,
+                            const BIGNUM *bn, EC_POINT *point, BN_CTX *ctx)
+{
+    size_t buf_len = 0;
+    unsigned char *buf;
+    EC_POINT *ret;
+
+    if ((buf_len = BN_num_bytes(bn)) == 0)
+        buf_len = 1;
+    if ((buf = OPENSSL_malloc(buf_len)) == NULL) {
+        ECerr(EC_F_EC_POINT_BN2POINT, ERR_R_MALLOC_FAILURE);
+        return NULL;
+    }
+
+    if (BN_bn2binpad(bn, buf, buf_len) < 0) {
+        OPENSSL_free(buf);
+        return NULL;
+    }
+
+    if (point == NULL) {
+        if ((ret = EC_POINT_new(group)) == NULL) {
+            OPENSSL_free(buf);
+            return NULL;
+        }
+    } else
+        ret = point;
+
+    if (!EC_POINT_oct2point(group, ret, buf, buf_len, ctx)) {
+        if (ret != point)
+            EC_POINT_clear_free(ret);
+        OPENSSL_free(buf);
+        return NULL;
+    }
+
+    OPENSSL_free(buf);
+    return ret;
+}
+#endif /* OPENSSL_NO_DEPRECATED_3_0 */