1 files changed, 113 insertions, 0 deletions
diff --git a/net/base/x509_openssl_util.cc b/net/base/x509_openssl_util.cc
new file mode 100644
index 0000000..22ab59a
--- /dev/null
+++ b/net/base/x509_openssl_util.cc
@@ -0,0 +1,113 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/base/x509_openssl_util.h"
+
+#include "base/logging.h"
+#include "base/string_number_conversions.h"
+#include "base/string_piece.h"
+#include "base/time.h"
+
+namespace net {
+
+namespace x509_openssl_util {
+
+namespace {
+
+// Helper for ParseDate. |*field| must contain at least |field_len| characters.
+// |*field| will be advanced by |field_len| on exit. |*ok| is set to false if
+// there is an error in parsing the number, but left untouched otherwise.
+// Returns the parsed integer.
+int ParseIntAndAdvance(const char** field, size_t field_len, bool* ok) {
+  int result = 0;
+  *ok &= base::StringToInt(*field, *field + field_len, &result);
+  *field += field_len;
+  return result;
+}
+
+}  // namespace
+
+bool ParsePrincipalKeyAndValueByIndex(X509_NAME* name,
+                                      int index,
+                                      std::string* key,
+                                      std::string* value) {
+  X509_NAME_ENTRY* entry = X509_NAME_get_entry(name, index);
+  if (!entry)
+    return false;
+
+  if (key) {
+    ASN1_OBJECT* object = X509_NAME_ENTRY_get_object(entry);
+    key->assign(OBJ_nid2sn(OBJ_obj2nid(object)));
+  }
+
+  ASN1_STRING* data = X509_NAME_ENTRY_get_data(entry);
+  if (!data)
+    return false;
+
+  unsigned char* buf = NULL;
+  int len = ASN1_STRING_to_UTF8(&buf, data);
+  if (len <= 0)
+    return false;
+
+  value->assign(reinterpret_cast<const char*>(buf), len);
+  OPENSSL_free(buf);
+  return true;
+}
+
+bool ParsePrincipalValueByIndex(X509_NAME* name,
+                                int index,
+                                std::string* value) {
+  return ParsePrincipalKeyAndValueByIndex(name, index, NULL, value);
+}
+
+bool ParsePrincipalValueByNID(X509_NAME* name, int nid, std::string* value) {
+  int index = X509_NAME_get_index_by_NID(name, nid, -1);
+  if (index < 0)
+    return false;
+
+  return ParsePrincipalValueByIndex(name, index, value);
+}
+
+bool ParseDate(ASN1_TIME* x509_time, base::Time* time) {
+  if (!x509_time ||
+      (x509_time->type != V_ASN1_UTCTIME &&
+       x509_time->type != V_ASN1_GENERALIZEDTIME))
+    return false;
+
+  base::StringPiece str_date(reinterpret_cast<const char*>(x509_time->data),
+                             x509_time->length);
+  // UTCTime: YYMMDDHHMMSSZ
+  // GeneralizedTime: YYYYMMDDHHMMSSZ
+  size_t year_length = x509_time->type == V_ASN1_UTCTIME ? 2 : 4;
+
+  if (str_date.length() < 11 + year_length)
+    return false;
+
+  const char* field = str_date.data();
+  bool valid = true;
+  base::Time::Exploded exploded = {0};
+
+  exploded.year =         ParseIntAndAdvance(&field, year_length, &valid);
+  exploded.month =        ParseIntAndAdvance(&field, 2, &valid);
+  exploded.day_of_month = ParseIntAndAdvance(&field, 2, &valid);
+  exploded.hour =         ParseIntAndAdvance(&field, 2, &valid);
+  exploded.minute =       ParseIntAndAdvance(&field, 2, &valid);
+  exploded.second =       ParseIntAndAdvance(&field, 2, &valid);
+  if (valid && year_length == 2)
+    exploded.year += exploded.year < 50 ? 2000 : 1900;
+
+  valid &= exploded.HasValidValues();
+
+  if (!valid) {
+    NOTREACHED() << "can't parse x509 date " << str_date;
+    return false;
+  }
+
+  *time = base::Time::FromUTCExploded(exploded);
+  return true;
+}
+
+} // namespace x509_openssl_util
+
+} // namespace net