Standard Library Dependencies

mldsa-native has minimal dependencies on the C standard library. This document lists all stdlib functions used and configuration options for custom replacements.

Dependencies

Memory Functions

• memcpy: Used extensively for copying data structures, keys, and intermediate values (40+ occurrences)
• memset: Used for zeroing state structures and buffers (3 occurrences). Note: This is NOT used for security-critical zeroing - that is handled by mld_zeroize which has its own custom replacement mechanism

Debug Functions (MLDSA_DEBUG builds only)

• fprintf: Used in debug.c for error reporting to stderr
• exit: Used in debug.c to terminate on assertion failures

Custom Replacements

Custom replacements can be provided for memory functions using the configuration options in mldsa/src/config.h:

MLD_CONFIG_CUSTOM_MEMCPY

Replaces all memcpy calls with a custom implementation. When enabled, you must define a mld_memcpy function with the same signature as the standard memcpy.

MLD_CONFIG_CUSTOM_MEMSET

Replaces all memset calls with a custom implementation. When enabled, you must define a mld_memset function with the same signature as the standard memset.

See the configuration examples in mldsa/src/config.h and test configurations in test/custom_*_config.h for usage examples and implementation requirements.