[openssl/openssl] 315845: Enhance code safety and readability in SSL_get_sha...

[heygauri]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 31584555aa5cc8a9fa7d4fc517f261cc4c17d7a9
      https://github.com/openssl/openssl/commit/31584555aa5cc8a9fa7d4fc517f261cc4c17d7a9
  Author: Sumitra Sharma <sumitraartsy at gmail.com>
  Date:   2023-09-18 (Mon, 18 Sep 2023)

  Changed paths:
    M ssl/ssl_lib.c

  Log Message:
  -----------
  Enhance code safety and readability in SSL_get_shared_ciphers()

This commit introduces two key improvements:

1. Improve code safety by replacing the conditional statement with
`if (n >= size)` and using OPENSSL_strnlen() instead of strlen().
This change ensures proper buffer size handling and adheres to
secure coding practices.

2. Enhance code readability by substituting `strcpy(p, c->name)` with
`memcpy(p, c->name, n)`. This adjustment prioritizes code clarity and
maintenance, even while mitigating a minimal buffer overflow risk.

These enhancements bolster the code's robustness and comprehensibility,
aligning with secure coding principles and best practices.

Fixes #19837

Signed-off-by: Sumitra Sharma <sumitraartsy at gmail.com>

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21934)

(cherry picked from commit 2743594d73e65c38375c619e89ec62579e2c24a9)