info > EVP_MD-MD4(7)

Che Dong

The user wants me to transform an OpenSSL man page HTML into an emoji-rich, visually scannable version. Let me analyze the content: 1. It's about `EVP_MD-MD4` - The MD4 EVP_MD implementation 2. Sections present: NAME, DESCRIPTION, SEE ALSO, COPYRIGHT 3. There's no SYNOPSIS, OPTIONS, EXAMPLES, or exit codes 4. No code blocks in the original 5. There are some links that I need to preserve Let me follow the rules: - No

, start from

- Section titles →

with emoji prefix - Sub-sections →

with emoji prefix - All code in


- Lists in 
- Preserve , ,  tags
- Escape < and > as < and > (already done in source with < and >)
- Add Quick Reference section as second section

Since this is a very minimal man page about a hash algorithm implementation, let me create a useful Quick Reference section.

Let me check for escaping needs:
- "<https://www.openssl.org/source/license.html>" - already escaped, good
- "EVP_MD-common(7)" - this is in a link, keep it

Links to preserve:
- /phpMan.php/info/EVP_MD-common/7
- /phpMan.php/info/provider-digest/7
- /phpMan.php/info/OSSL_PROVIDER-default/7
- https://www.openssl.org/source/license.html

Let me construct the HTML now.

📛 NAME
EVP_MD-MD4 — The MD4 EVP_MD implementation

🚀 Quick Reference

Use Case Command / Identifier Description
Algorithm name "MD4" Identifier passed to EVP_MD fetch APIs
Provider legacy MD4 is only available in the legacy provider
Digest size 128 bits Output length of an MD4 digest
Use via API EVP_DigestInit_ex(ctx, EVP_md4(), NULL) Initialize a digest context for MD4
Check params EVP_MD_CTX_get_params(ctx, params) Retrieve common gettable MD parameters


📖 DESCRIPTION
Support for computing MD4 digests through the EVP_MD API. 🧩

🆔 Identity
This implementation is only available with the legacy provider, and is identified with the name "MD4". 🏛️

📥 Gettable Parameters
✅ This implementation supports the common gettable parameters described in EVP_MD-common(7).

🔗 SEE ALSO
📚 provider-digest(7), OSSL_PROVIDER-default(7)

©️ COPYRIGHT
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved. 🛡️

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. ⚖️


3.0.2 — 2026-06-02 — EVP_MD-MD4(7SSL)

Use Case	Command / Identifier	Description
Algorithm name	`"MD4"`	Identifier passed to EVP_MD fetch APIs
Provider	`legacy`	MD4 is only available in the legacy provider
Digest size	`128 bits`	Output length of an MD4 digest
Use via API	`EVP_DigestInit_ex(ctx, EVP_md4(), NULL)`	Initialize a digest context for MD4
Check params	`EVP_MD_CTX_get_params(ctx, params)`	Retrieve common gettable MD parameters