Add a new ExtractSubjectPublicKeyFromSPKI method to asn1_utils.

net/base/asn1_util.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_BASE_ASN1_UTIL_H_
 #define NET_BASE_ASN1_UTIL_H_
 
 #include <vector>
 
 #include "base/string_piece.h"
@@ skipping 45 matching lines @@
 bool GetElement(base::StringPiece* in,
                 unsigned tag_value,
                 base::StringPiece* out);
 
 // ExtractSPKIFromDERCert parses the DER encoded certificate in |cert| and
 // extracts the bytes of the SubjectPublicKeyInfo. On successful return,
 // |spki_out| is set to contain the SPKI, pointing into |cert|.
 NET_EXPORT_PRIVATE bool ExtractSPKIFromDERCert(base::StringPiece cert,
                                                base::StringPiece* spki_out);
 
+// ExtractSubjectPublicKeyFromSPKI parses the DER encoded SubjectPublicKeyInfo
+// in |spki| and extracts the bytes of the SubjectPublicKey. On successful
+// return, |spk_out| is set to contain the public key, pointing into |spki|.
+NET_EXPORT_PRIVATE bool ExtractSubjectPublicKeyFromSPKI(
+    base::StringPiece spki,
+    base::StringPiece* spk_out);
+
 // ExtractCRLURLsFromDERCert parses the DER encoded certificate in |cert| and
 // extracts the URL of each CRL. On successful return, the elements of
 // |urls_out| point into |cert|.
 //
 // CRLs that only cover a subset of the reasons are omitted as the spec
 // requires that at least one CRL be included that covers all reasons.
 //
 // CRLs that use an alternative issuer are also omitted.
 //
 // The nested set of GeneralNames is flattened into a single list because
 // having several CRLs with one location is equivalent to having one CRL with
 // several locations as far as a CRL filter is concerned.
 NET_EXPORT_PRIVATE bool ExtractCRLURLsFromDERCert(
     base::StringPiece cert,
     std::vector<base::StringPiece>* urls_out);
 
 } // namespace asn1
 
 } // namespace net
 
 #endif // NET_BASE_ASN1_UTIL_H_