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Various Hardening Updates - #617
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Five hardening changes from a security audit. None is a fresh attacker primitive on its own; the audit recommended shipping them as one PR. - `RemoveIniEntry`: anchor the regex with `\b` and `preg_quote` the extension name, so uninstalling `foo` no longer rewrites the prefix of `extension=foo_other` lines. - `PlaceholderReplacer` and `WindowsInstall`: skip symlinks during the recursive source walk, so the iterator no longer descends into files outside the extracted source dir. - `OverrideDownloadUrlInstallListener`: warn that swapping to a release-asset URL leaves only HTTPS-to-origin as the integrity guarantee, since Composer's dist-sha was bound to the original Packagist URL. - `ConfigureOption`: validate `php-ext.configure-options[].name` against `/^[a-zA-Z][a-zA-Z0-9_-]*$/`, so configure-flag identifiers can't carry whitespace or shell metacharacters into argv or `installed.json`. - `FallbackVerificationUsingOpenSsl`: promote the fallback notice to `writeError` and document that the OpenSSL path skips Rekor transparency-log verification.
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Summary
Five hardening changes from a security audit. None is a fresh attacker primitive on its own; the audit recommended shipping them as one PR.
RemoveIniEntry: anchor the regex with\bandpreg_quotethe extension name, so uninstallingfoono longer rewrites the prefix ofextension=foo_otherlines.PlaceholderReplacerandWindowsInstall: skip symlinks during the recursive source walk, so the iterator no longer descends into files outside the extracted source dir.OverrideDownloadUrlInstallListener: warn that swapping to a release-asset URL leaves only HTTPS-to-origin as the integrity guarantee, since Composer's dist-sha was bound to the original Packagist URL.ConfigureOption: validatephp-ext.configure-options[].nameagainst/^[a-zA-Z][a-zA-Z0-9_-]*$/, so configure-flag identifiers can't carry whitespace or shell metacharacters into argv orinstalled.json.FallbackVerificationUsingOpenSsl: promote the fallback notice towriteErrorand document that the OpenSSL path skips Rekor transparency-log verification.