This commit makes multiple important changes:

1. A new key object API is introduced. The KeyObject class itself is
   not exposed to users, instead, several new APIs can be used to
   construct key objects: createSecretKey, createPrivateKey and
   createPublicKey. The new API also allows to convert between
   different key formats, and even though the API itself is not
   compatible to the WebCrypto standard in any way, it makes
   interoperability much simpler.

2. Key objects can be used instead of the raw key material in all
   relevant crypto APIs.

3. The handling of asymmetric keys has been unified and greatly
   improved. Node.js now fully supports both PEM-encoded and
   DER-encoded public and private keys.

4. Conversions between buffers and strings have been moved to native
   code for sensitive data such as symmetric keys due to security
   considerations such as zeroing temporary buffers.

5. For compatibility with older versions of the crypto API, this
   change allows to specify Buffers and strings as the "passphrase"
   option when reading or writing an encoded key. Note that this
   can result in unexpected behavior if the password contains a
   null byte.

PR-URL: #24234
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

PR-URL: #24234
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Notable Changes:

* cli:
  - add --max-http-header-size flag (cjihrig)
    #24811
* crypto:
  - always accept certificates as public keys (Tobias Nießen)
    #24234
  - add key object API (Tobias Nießen) [#24234](#24234)
  - update root certificates (Sam Roberts)
    #25113
* deps:
  - upgrade to libuv 1.24.1 (cjihrig)
    #25078
  - upgrade npm to 6.5.0 (Audrey Eschright)
    #24734
* http:
  - add maxHeaderSize property (cjihrig)
    #24860

PR-URL: #25175

Notable Changes:

* cli:
  - add --max-http-header-size flag (cjihrig)
    #24811
* crypto:
  - always accept certificates as public keys (Tobias Nießen)
    #24234
  - add key object API (Tobias Nießen) [#24234](#24234)
  - update root certificates (Sam Roberts)
    #25113
* deps:
  - upgrade to libuv 1.24.1 (cjihrig)
    #25078
  - upgrade npm to 6.5.0 (Audrey Eschright)
    #24734
* http:
  - add maxHeaderSize property (cjihrig)
    #24860

PR-URL: #25175

During the time between nodejs#24234
being opened and it landing, a V8 update occurred that deprecated
several APIs. This commit fixes the following compiler warnings:

../src/node_crypto.cc:3342:11:
  warning: 'Set' is deprecated: Use maybe version

../src/node_crypto.cc:3345:13:
  warning: 'GetFunction' is deprecated: Use maybe version

PR-URL: nodejs#25205
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Notable Changes:

* cli:
  - add --max-http-header-size flag (cjihrig)
    #24811
* crypto:
  - always accept certificates as public keys (Tobias Nießen)
    #24234
  - add key object API (Tobias Nießen) [#24234](#24234)
  - update root certificates (Sam Roberts)
    #25113
* deps:
  - upgrade to libuv 1.24.1 (cjihrig)
    #25078
  - upgrade npm to 6.5.0 (Audrey Eschright)
    #24734
* http:
  - add maxHeaderSize property (cjihrig)
    #24860

PR-URL: #25175

During the time between #24234
being opened and it landing, a V8 update occurred that deprecated
several APIs. This commit fixes the following compiler warnings:

../src/node_crypto.cc:3342:11:
  warning: 'Set' is deprecated: Use maybe version

../src/node_crypto.cc:3345:13:
  warning: 'GetFunction' is deprecated: Use maybe version

PR-URL: #25205
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

This commit makes multiple important changes:

1. A new key object API is introduced. The KeyObject class itself is
   not exposed to users, instead, several new APIs can be used to
   construct key objects: createSecretKey, createPrivateKey and
   createPublicKey. The new API also allows to convert between
   different key formats, and even though the API itself is not
   compatible to the WebCrypto standard in any way, it makes
   interoperability much simpler.

2. Key objects can be used instead of the raw key material in all
   relevant crypto APIs.

3. The handling of asymmetric keys has been unified and greatly
   improved. Node.js now fully supports both PEM-encoded and
   DER-encoded public and private keys.

4. Conversions between buffers and strings have been moved to native
   code for sensitive data such as symmetric keys due to security
   considerations such as zeroing temporary buffers.

5. For compatibility with older versions of the crypto API, this
   change allows to specify Buffers and strings as the "passphrase"
   option when reading or writing an encoded key. Note that this
   can result in unexpected behavior if the password contains a
   null byte.

PR-URL: nodejs#24234
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

PR-URL: nodejs#24234
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

During the time between nodejs#24234
being opened and it landing, a V8 update occurred that deprecated
several APIs. This commit fixes the following compiler warnings:

../src/node_crypto.cc:3342:11:
  warning: 'Set' is deprecated: Use maybe version

../src/node_crypto.cc:3345:13:
  warning: 'GetFunction' is deprecated: Use maybe version

PR-URL: nodejs#25205
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Expose the size of asymetric keys of crypto key object from the
crypto module added in v11.6.0 (nodejs#24234)

Expose the size of asymetric keys of crypto key object from the
crypto module added in v11.6.0.

PR-URL: nodejs#26387
Refs: nodejs#24234
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Expose the size of asymetric keys of crypto key object from the
crypto module added in v11.6.0.

PR-URL: nodejs#26387
Refs: nodejs#24234
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

I added this class in 823d86c in 2018
when we did not yet use `std::optional`. The last uses were removed in
5b9bf39, so remove it.

Refs: #24234
Refs: #55368
PR-URL: #58168
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

I added this class in 823d86c in 2018
when we did not yet use `std::optional`. The last uses were removed in
5b9bf39, so remove it.

Refs: #24234
Refs: #55368
PR-URL: #58168
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

I added this class in 823d86c in 2018
when we did not yet use `std::optional`. The last uses were removed in
5b9bf39, so remove it.

Refs: #24234
Refs: #55368
PR-URL: #58168
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>