src,crypto: refactor crypto_dh.cc

[RaisinTen]

src,crypto: remove uses of AllocatedBuffer from crypto_dh.cc

Refs: #39941

src: remove unnecessary static qualifier in crypto_dh.cc

ZeroPadDiffieHellmanSecret() is in an anonymous namespace, so it has
static linkage already.

src,crypto: handle empty maybe correctly in crypto_dh.cc

Buffer::Length() dereferences the passed Local, so calling it when the
underlying pointer is a nullptr would lead to a crash. This fixes that
by returning early instead.

Signed-off-by: Darshan Sen raisinten@gmail.com

[nodejs-github-bot]

Review requested:

• @nodejs/crypto

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/43203/

[nodejs-github-bot]

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----------------------------------- PR info ------------------------------------
Title      src,crypto: refactor `crypto_dh.cc` (#42492)
Author     Darshan Sen  (@RaisinTen)
Branch     RaisinTen:src,crypto/refactor-crypto_dh -> nodejs:master
Labels     crypto, c++, author ready, needs-ci
Commits    3
 - src,crypto: remove uses of AllocatedBuffer from crypto_dh.cc
 - src: remove unnecessary static qualifier in crypto_dh.cc
 - src,crypto: handle empty maybe correctly in crypto_dh.cc
Committers 1
 - Darshan Sen 
PR-URL: https://github.com/nodejs/node/pull/42492
Refs: https://github.com/nodejs/node/pull/39941
Reviewed-By: Tobias Nießen 
Reviewed-By: Anna Henningsen 
------------------------------ Generated metadata ------------------------------
PR-URL: https://github.com/nodejs/node/pull/42492
Refs: https://github.com/nodejs/node/pull/39941
Reviewed-By: Tobias Nießen 
Reviewed-By: Anna Henningsen 
--------------------------------------------------------------------------------
   ℹ  This PR was created on Sun, 27 Mar 2022 13:25:58 GMT
   ✔  Approvals: 2
   ✔  - Tobias Nießen (@tniessen) (TSC): https://github.com/nodejs/node/pull/42492#pullrequestreview-922458162
   ✔  - Anna Henningsen (@addaleax): https://github.com/nodejs/node/pull/42492#pullrequestreview-925243682
   ✔  Last GitHub CI successful
   ℹ  Last Full PR CI on 2022-03-27T21:15:26Z: https://ci.nodejs.org/job/node-test-pull-request/43203/
- Querying data for job/node-test-pull-request/43203/
   ✔  Last Jenkins CI successful
--------------------------------------------------------------------------------
   ✔  No git cherry-pick in progress
   ✔  No git am in progress
   ✔  No git rebase in progress
--------------------------------------------------------------------------------
- Bringing origin/master up to date...
From https://github.com/nodejs/node
 * branch                  master     -> FETCH_HEAD
✔  origin/master is now up-to-date
- Downloading patch for 42492
From https://github.com/nodejs/node
 * branch                  refs/pull/42492/merge -> FETCH_HEAD
✔  Fetched commits as 85f679fff101..c1ac41dce2ec
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[master 4e0135cabd] src,crypto: remove uses of AllocatedBuffer from crypto_dh.cc
 Author: Darshan Sen 
 Date: Sun Mar 27 18:02:52 2022 +0530
 1 file changed, 52 insertions(+), 24 deletions(-)
[master e572e53817] src: remove unnecessary static qualifier in crypto_dh.cc
 Author: Darshan Sen 
 Date: Sun Mar 27 18:06:08 2022 +0530
 1 file changed, 3 insertions(+), 3 deletions(-)
[master 68d23c2f72] src,crypto: handle empty maybe correctly in crypto_dh.cc
 Author: Darshan Sen 
 Date: Sun Mar 27 18:20:20 2022 +0530
 1 file changed, 4 insertions(+), 3 deletions(-)
   ✔  Patches applied
There are 3 commits in the PR. Attempting autorebase.
Rebasing (2/6)
Executing: git node land --amend --yes

⚠  Found Refs: #39941, skipping..

--------------------------------- New Message ----------------------------------

src,crypto: remove uses of AllocatedBuffer from crypto_dh.cc
Refs: #39941

Signed-off-by: Darshan Sen raisinten@gmail.com
PR-URL: #42492

Reviewed-By: Tobias Nießen tniessen@tnie.de

Reviewed-By: Anna Henningsen anna@addaleax.net
[detached HEAD 2b2431f042] src,crypto: remove uses of AllocatedBuffer from crypto_dh.cc

Author: Darshan Sen raisinten@gmail.com

Date: Sun Mar 27 18:02:52 2022 +0530

1 file changed, 52 insertions(+), 24 deletions(-)

Rebasing (3/6)

Rebasing (4/6)
Executing: git node land --amend --yes

--------------------------------- New Message ----------------------------------

src: remove unnecessary static qualifier in crypto_dh.cc
ZeroPadDiffieHellmanSecret() is in an anonymous namespace, so it has

static linkage already.
Signed-off-by: Darshan Sen raisinten@gmail.com
PR-URL: #42492

Refs: #39941

Reviewed-By: Tobias Nießen tniessen@tnie.de

Reviewed-By: Anna Henningsen anna@addaleax.net
[detached HEAD 18b44ac73a] src: remove unnecessary static qualifier in crypto_dh.cc

Author: Darshan Sen raisinten@gmail.com

Date: Sun Mar 27 18:06:08 2022 +0530

1 file changed, 3 insertions(+), 3 deletions(-)

Rebasing (5/6)

Rebasing (6/6)
Executing: git node land --amend --yes

--------------------------------- New Message ----------------------------------

src,crypto: handle empty maybe correctly in crypto_dh.cc
Buffer::Length() dereferences the passed Local, so calling it when the

underlying pointer is a nullptr would lead to a crash. This fixes that

by returning early instead.
Signed-off-by: Darshan Sen raisinten@gmail.com
PR-URL: #42492

Refs: #39941

Reviewed-By: Tobias Nießen tniessen@tnie.de

Reviewed-By: Anna Henningsen anna@addaleax.net
[detached HEAD 4d0259a00f] src,crypto: handle empty maybe correctly in crypto_dh.cc

Author: Darshan Sen raisinten@gmail.com

Date: Sun Mar 27 18:20:20 2022 +0530

1 file changed, 4 insertions(+), 3 deletions(-)
Successfully rebased and updated refs/heads/master.
ℹ  Use --fixupAll option, squash the PR manually or land the PR from the command line.

https://github.com/nodejs/node/actions/runs/2066012062

[nodejs-github-bot]

Landed in 85f679f...f2a22ef