Remove support for the keygen tag

net/base/keygen_handler_openssl.cc

Index: net/base/keygen_handler_openssl.cc
diff --git a/net/base/keygen_handler_openssl.cc b/net/base/keygen_handler_openssl.cc
deleted file mode 100644
index 161a5b743d8601a8d84c613afbeb4e485159180c..0000000000000000000000000000000000000000
--- a/net/base/keygen_handler_openssl.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// 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.
-
-#include <stdint.h>
-
-#include <memory>
-
-#include "base/base64.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/strings/string_piece.h"
-#include "crypto/openssl_util.h"
-#include "crypto/rsa_private_key.h"
-#include "net/base/keygen_handler.h"
-#include "net/base/openssl_private_key_store.h"
-#include "third_party/boringssl/src/include/openssl/bytestring.h"
-#include "third_party/boringssl/src/include/openssl/digest.h"
-#include "third_party/boringssl/src/include/openssl/evp.h"
-#include "third_party/boringssl/src/include/openssl/mem.h"
-
-namespace net {
-
-std::string KeygenHandler::GenKeyAndSignChallenge() {
-  std::unique_ptr<crypto::RSAPrivateKey> key(
-      crypto::RSAPrivateKey::Create(key_size_in_bits_));
-  EVP_PKEY* pkey = key->key();
-
-  if (stores_key_)
-    OpenSSLPrivateKeyStore::StoreKeyPair(url_, pkey);
-
-  // Serialize the following structure, from
-  // https://developer.mozilla.org/en-US/docs/Web/HTML/Element/keygen.
-  //
-  //   PublicKeyAndChallenge ::= SEQUENCE {
-  //       spki SubjectPublicKeyInfo,
-  //       challenge IA5STRING
-  //   }
-  //
-  //   SignedPublicKeyAndChallenge ::= SEQUENCE {
-  //       publicKeyAndChallenge PublicKeyAndChallenge,
-  //       signatureAlgorithm AlgorithmIdentifier,
-  //       signature BIT STRING
-  //   }
-  //
-  // The signature is over the PublicKeyAndChallenge.
-
-  // TODO(davidben): If we gain another consumer, factor this code out into
-  // shared logic, sharing OID definitions with the verifier, to support signing
-  // other X.509-style structures.
-
-  crypto::OpenSSLErrStackTracer tracer(FROM_HERE);
-
-  // Serialize up to the PublicKeyAndChallenge.
-  bssl::ScopedCBB cbb;
-  CBB spkac, public_key_and_challenge, challenge;
-  if (!CBB_init(cbb.get(), 0) ||
-      !CBB_add_asn1(cbb.get(), &spkac, CBS_ASN1_SEQUENCE) ||
-      !CBB_add_asn1(&spkac, &public_key_and_challenge, CBS_ASN1_SEQUENCE) ||
-      !EVP_marshal_public_key(&public_key_and_challenge, pkey) ||
-      !CBB_add_asn1(&public_key_and_challenge, &challenge,
-                    CBS_ASN1_IA5STRING) ||
-      !CBB_add_bytes(&challenge,
-                     reinterpret_cast<const uint8_t*>(challenge_.data()),
-                     challenge_.size()) ||
-      !CBB_flush(&spkac)) {
-    return std::string();
-  }
-
-  // Hash what's been written so far.
-  bssl::ScopedEVP_MD_CTX ctx;
-  if (!EVP_DigestSignInit(ctx.get(), nullptr, EVP_md5(), nullptr, pkey) ||
-      !EVP_DigestSignUpdate(ctx.get(), CBB_data(&spkac), CBB_len(&spkac))) {
-    return std::string();
-  }
-
-  // The DER encoding of 1.2.840.113549.1.1.4, MD5 with RSA encryption.
-  static const uint8_t kMd5WithRsaEncryption[] = {
-      0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x04,
-  };
-
-  // Write the signatureAlgorithm.
-  CBB algorithm, oid, null;
-  if (!CBB_add_asn1(&spkac, &algorithm, CBS_ASN1_SEQUENCE) ||
-      !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
-      !CBB_add_bytes(&oid, kMd5WithRsaEncryption,
-                     sizeof(kMd5WithRsaEncryption)) ||
-      !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL)) {
-    return std::string();
-  }
-
-  // Compute and write the signature. Note that X.509 signatures, although
-  // always byte strings for RSA, are encoded as BIT STRINGS with a multiple of
-  // 8 bits.
-  CBB sig_bitstring;
-  uint8_t* sig;
-  size_t sig_len;
-  if (!CBB_add_asn1(&spkac, &sig_bitstring, CBS_ASN1_BITSTRING) ||
-      !CBB_add_u8(&sig_bitstring, 0 /* no unused bits */) ||
-      // Determine the maximum length of the signature.
-      !EVP_DigestSignFinal(ctx.get(), nullptr, &sig_len) ||
-      // Reserve |sig_len| bytes and write the signature to |spkac|.
-      !CBB_reserve(&sig_bitstring, &sig, sig_len) ||
-      !EVP_DigestSignFinal(ctx.get(), sig, &sig_len) ||
-      !CBB_did_write(&sig_bitstring, sig_len)) {
-    return std::string();
-  }
-
-  // Finally, the structure is base64-encoded.
-  uint8_t* der;
-  size_t der_len;
-  if (!CBB_finish(cbb.get(), &der, &der_len)) {
-    return std::string();
-  }
-  std::string result;
-  base::Base64Encode(
-      base::StringPiece(reinterpret_cast<const char*>(der), der_len), &result);
-  OPENSSL_free(der);
-  return result;
-}
-
-}  // namespace net