wp-includes/sodium_compat/lib/php72compat.php:1621$paddedstring$block_sizeintstring function sodium_unpad( #[\SensitiveParameter] $padded, $block_size ) { return ParagonIE_Sodium_Compat::unpad($padded, $block_size, true); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sodium_compat/lib/php72compat.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.