1 files changed, 116 insertions, 0 deletions
diff --git a/src/crypto/ecdsa/ecdsa_asn1.c b/src/crypto/ecdsa/ecdsa_asn1.c
new file mode 100644
index 0000000..b3c6a87
--- /dev/null
+++ b/src/crypto/ecdsa/ecdsa_asn1.c
@@ -0,0 +1,116 @@
+/* ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com). */
+
+#include <openssl/ecdsa.h>
+
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/ec_key.h>
+
+#include "../ec/internal.h"
+
+
+DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG);
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG);
+
+ASN1_SEQUENCE(ECDSA_SIG) = {
+    ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
+    ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM),
+} ASN1_SEQUENCE_END(ECDSA_SIG);
+
+IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG);
+
+size_t ECDSA_size(const EC_KEY *key) {
+  size_t ret, i, group_order_size;
+  ASN1_INTEGER bs;
+  BIGNUM *order = NULL;
+  unsigned char buf[4];
+  const EC_GROUP *group;
+
+  if (key->ecdsa_meth && key->ecdsa_meth->group_order_size) {
+    group_order_size = key->ecdsa_meth->group_order_size(key);
+  } else {
+    size_t num_bits;
+
+    if (key == NULL) {
+      return 0;
+    }
+    group = EC_KEY_get0_group(key);
+    if (group == NULL) {
+      return 0;
+    }
+
+    order = BN_new();
+    if (order == NULL) {
+      return 0;
+    }
+    if (!EC_GROUP_get_order(group, order, NULL)) {
+      BN_clear_free(order);
+      return 0;
+    }
+
+    num_bits = BN_num_bits(order);
+    group_order_size = (num_bits + 7) / 8;
+  }
+
+  bs.length = group_order_size;
+  bs.data = buf;
+  bs.type = V_ASN1_INTEGER;
+  /* If the top bit is set the ASN.1 encoding is 1 larger. */
+  buf[0] = 0xff;
+
+  i = i2d_ASN1_INTEGER(&bs, NULL);
+  i += i; /* r and s */
+  ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
+  BN_clear_free(order);
+  return ret;
+}