https://gitlab.synchro.net/main/sbbs/-/commit/a06e7e2cb45f81116329b146
Modified Files:
src/ssh/kex/dh-gex-sha256.c src/ssh/ssh-internal.h ssh-trans.c src/ssh/test/dssh_test_internal.h test_transport.c
Log Message:
Expose version_tx, parse_bn_mpint, dh_value_valid for testing; add 12 tests

Move DSSH_TESTABLE macro definition from ssh-trans.c to ssh-internal.h
so all library source files can use it.

Expose three static functions via DSSH_TESTABLE:
- version_tx (ssh-trans.c): sends the SSH version identification line
- parse_bn_mpint (dh-gex-sha256.c): parses an mpint from wire format
- dh_value_valid (dh-gex-sha256.c): validates DH e/f in [1, p-1]

Add test accessors dssh_test_set_sw_version/set_version_comment to
bypass set_version validation for defense-in-depth testing.

New tests:
- version_tx TOOLONG with oversized version string
- version_tx TOOLONG with oversized comment
- parse_bn_mpint: valid, short header, truncated data
- dh_value_valid: zero, negative, equal to p, greater than p,
valid interior, boundary values (1 and p-1)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---
þ Synchronet þ Vertrauen þ Home of Synchronet þ [vert/cvs/bbs].synchro.net