HMAC added to dgst

[aidankeefe2022]

Added new flags to the dgst sub command.
Created 3 helper functions to make the HMAC and sign/verify functionalities easy to read and use.
Added end-to-end tests for HMAC RFC Vectors using hex key and plain text key.
Changed input to allow for data to be passed to stdin for dgst.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #257

Scan targets checked: wolfclu-bugs, wolfclu-src

Findings: 1
1 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #257

Scan targets checked: wolfclu-bugs, wolfclu-src

Findings: 1
1 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #257

Scan targets checked: wolfclu-bugs, wolfclu-src

Findings: 1
1 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #257

Scan targets checked: wolfclu-bugs, wolfclu-src

No new issues found in the changed files. ✅

[Copilot]

Pull request overview

Adds HMAC support to the existing dgst subcommand (alongside sign/verify), including new CLI flags, a streaming HMAC helper, and end-to-end RFC vector tests. It also updates dgst input handling so data can be supplied via stdin when no positional input file is present.

Changes:

• Add -hmac / -mackey flags to dgst and update help text + stdin/positional input handling.
• Introduce a streaming HMAC implementation (wolfCLU_hmacHash) and an HMAC dispatch helper in dgst setup.
• Add end-to-end Python tests covering RFC vectors, output-to-file behavior, and key parsing edge cases.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
wolfclu/clu_optargs.h	Adds new option IDs for dgst HMAC flags.
wolfclu/clu_header_main.h	Exposes the new wolfCLU_hmacHash() API (with updated includes/docs).
src/tools/clu_funcs.c	Implements streaming HMAC helper used by dgst.
src/sign-verify/clu_dgst_setup.c	Extends dgst to support HMAC mode and stdin input dispatch.
tests/dgst/dgst-test.py	Adds HMAC RFC vector and behavior tests.

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[billphipps]

Copilot comments are pretty good. A few minor nits, but this looks like a great addition!

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #257

Scan targets checked: wolfclu-bugs, wolfclu-src

Findings: 1
1 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[aidankeefe2022]

Jenkins retest this please

[billphipps]

LGTM! Ty!