Add crypto_stream_xchacha20 to ext/sodium #6868

paragonie-security · 2021-04-15T04:23:45Z

Paragon Initiative Enterprises is aware of PHP applications that use sodium_compat's ParagonIE\Sodium\Core\XChaCha20 class directly for stream encryption.

Greater performance and security assurance is offered by exposing libsodium's crypto_stream_xchacha20 API to PHP users.

It's acceptable to only include this change in PHP 8.1+; the offending applications are more than welcome to either install ext/sodium from PECL or upgrade to 8.1 when it comes out later this year.

Ref: jedisct1/libsodium-php#211
Ref: paragonie/sodium_compat#128

nikic

This needs a reindent from spaces to tabs, but otherwise should be fine per upstream review.

nikic · 2021-04-15T07:52:36Z

ext/sodium/libsodium_arginfo.h

+#ifdef crypto_stream_xchacha20_KEYBYTES
+#define arginfo_sodium_crypto_stream_xchacha20_xor arginfo_sodium_crypto_stream_xor
+#define arginfo_sodium_crypto_stream_xchacha20 arginfo_sodium_crypto_stream
+#endif


This is a generated file, run build/gen_stub.php ext/sodium to regenerate.

This function isn't guaranteed to exist on older versions (1.0.11 and earlier) of libsodium. Does build/gen_stub.php need to take this into consideration?

3v4l.org in particular seems to use an ancient version of the library (possibly 1.0.8).

Yes, you need to add the corresponding #ifdef in the stub file as well. They will be transferred to the generated output.

Paragon Initiative Enterprises is aware of PHP applications that use sodium_compat's ParagonIE\Sodium\Core\XChaCha20 class directly for stream encryption. Greater performance and security assurance is offered by exposing libsodium's crypto_stream_xchacha20 API to PHP users. It's acceptable to only include this change in PHP 8.1+; the offending applications are more than welcome to either install ext/sodium from PECL or upgrade to 8.1 when it comes out later this year. Ref: jedisct1/libsodium-php#211

nikic · 2021-04-16T07:57:50Z

ext/sodium/libsodium.c

+		zend_argument_error(sodium_exception_ce, 3, "key must be SODIUM_CRYPTO_STREAM_XCHACHA20_KEYBYTES bytes long");
+		RETURN_THROWS();
+	}
+	ciphertext = zend_string_checked_alloc((size_t) ciphertext_len, 0);


Hm, it looks like this function was added in the PECL extension in jedisct1/libsodium-php@75701f2, but is missing here...

./configure doesn't work locally, otherwise we would have caught these without having to depend on CI.

jedisct1/libsodium-php@75701f2

nikic · 2021-04-19T09:11:54Z

Fixed a few more issues in 6adfe9d, which came up during local testing.

Also includes the UPGRADING changes for php#6868

Includes unit tests. Refs: * https://www.php.net/manual/en/migration81.new-functions.php#migration81.new-functions.sodium * php/php-src#6868 * php/php-src@f7f1f7f * php/php-src#6922 * php/php-src@9b794f8

While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium xchacha* functions, does declare a couple of new constants as well... Includes unit tests. Refs: * php/php-src#6868 * php/php-src@f7f1f7f#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR352-R357

While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium xchacha* functions, does declare a couple of new constants as well... Refs: * php/php-src#6868 * php/php-src@f7f1f7f#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR352-R357 While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium ristretto255* functions, also declares a number of new constants as well... Refs: * php/php-src#6922 * php/php-src@9b794f8#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR368-R381

* PHP 8.1 | MigrationGuide/New constants: add missing constants [1] > * Added CURLOPT_DOH_URL option > * Added certificate blob options when for libcurl >= 7.71.0: > > CURLOPT_ISSUERCERT_BLOB > CURLOPT_PROXY_ISSUERCERT > CURLOPT_PROXY_ISSUERCERT_BLOB > CURLOPT_PROXY_SSLCERT_BLOB > CURLOPT_PROXY_SSLKEY_BLOB > CURLOPT_SSLCERT_BLOB > CURLOPT_SSLKEY_BLOB Refs: * https://github.com/php/php-src/blob/f67986a9218f4889d9352a87c29337a5b6eaa4bd/UPGRADING#L220-L229 * php/php-src#6612 * php/php-src@3dad63b * php/php-src#7194 * php/php-src@b11785c * PHP 8.1 | MigrationGuide/New constants: add missing constants [2] > GD: > * Avif support is now available through the `imagecreatefromavif()` and > `imageavif()` functions, if libgd has been built with avif support. While not mentioned in the changelog entry, the commit to PHP does contain a new constant declaration... Refs: * https://github.com/php/php-src/blob/f67986a9218f4889d9352a87c29337a5b6eaa4bd/UPGRADING#L245-L247 * php/php-src#7026 * php/php-src@81f6d36#diff-00d1efef2247b288c86a6c3bfefac111a4774fbc5453fdc02dcf36c4a23da283R373 > GD: > * `imagewebp()` can do lossless WebP encoding by passing `IMG_WEBP_LOSSLESS` as > quality. This constant is only defined, if a libgd is used which supports > lossless WebP encoding. Refs: * https://github.com/php/php-src/blob/3a71fcf5caf042a4ce8a586a6b554fd70432e1e2/UPGRADING#L568-L571 * php/php-src#7348 * php/php-src@eb6c9eb * PHP 8.1 | MigrationGuide/New constants: add missing constants [3] > Added `POSIX_RLIMIT_KQUEUES` and `POSIX_RLIMIT_NPTS`. These rlimits are only available on FreeBSD. Refs: * https://www.php.net/manual/en/migration81.new-features.php#migration81.new-features.posix * php/php-src#6608 * php/php-src@ebca8de * PHP 8.1 | MigrationGuide/New constants: add missing constants [4] Refs: * https://wiki.php.net/rfc/readonly_properties_v2 * php/php-src#7089 * php/php-src@6780aaa * PHP 8.1 | MigrationGuide/New constants: add missing constants [5] While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium xchacha* functions, does declare a couple of new constants as well... Refs: * php/php-src#6868 * php/php-src@f7f1f7f#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR352-R357 While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium ristretto255* functions, also declares a number of new constants as well... Refs: * php/php-src#6922 * php/php-src@9b794f8#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR368-R381 Co-authored-by: jrfnl <jrfnl@users.noreply.github.com> Closes GH-1449.

* PHP 8.1 | MigrationGuide/New constants: add missing constants [1] > * Added CURLOPT_DOH_URL option > * Added certificate blob options when for libcurl >= 7.71.0: > > CURLOPT_ISSUERCERT_BLOB > CURLOPT_PROXY_ISSUERCERT > CURLOPT_PROXY_ISSUERCERT_BLOB > CURLOPT_PROXY_SSLCERT_BLOB > CURLOPT_PROXY_SSLKEY_BLOB > CURLOPT_SSLCERT_BLOB > CURLOPT_SSLKEY_BLOB Refs: * https://github.com/php/php-src/blob/f67986a9218f4889d9352a87c29337a5b6eaa4bd/UPGRADING#L220-L229 * php/php-src#6612 * php/php-src@3dad63b * php/php-src#7194 * php/php-src@b11785c * PHP 8.1 | MigrationGuide/New constants: add missing constants [2] > GD: > * Avif support is now available through the `imagecreatefromavif()` and > `imageavif()` functions, if libgd has been built with avif support. While not mentioned in the changelog entry, the commit to PHP does contain a new constant declaration... Refs: * https://github.com/php/php-src/blob/f67986a9218f4889d9352a87c29337a5b6eaa4bd/UPGRADING#L245-L247 * php/php-src#7026 * php/php-src@81f6d36#diff-00d1efef2247b288c86a6c3bfefac111a4774fbc5453fdc02dcf36c4a23da283R373 > GD: > * `imagewebp()` can do lossless WebP encoding by passing `IMG_WEBP_LOSSLESS` as > quality. This constant is only defined, if a libgd is used which supports > lossless WebP encoding. Refs: * https://github.com/php/php-src/blob/3a71fcf5caf042a4ce8a586a6b554fd70432e1e2/UPGRADING#L568-L571 * php/php-src#7348 * php/php-src@eb6c9eb * PHP 8.1 | MigrationGuide/New constants: add missing constants [3] > Added `POSIX_RLIMIT_KQUEUES` and `POSIX_RLIMIT_NPTS`. These rlimits are only available on FreeBSD. Refs: * https://www.php.net/manual/en/migration81.new-features.php#migration81.new-features.posix * php/php-src#6608 * php/php-src@ebca8de * PHP 8.1 | MigrationGuide/New constants: add missing constants [4] Refs: * https://wiki.php.net/rfc/readonly_properties_v2 * php/php-src#7089 * php/php-src@6780aaa * PHP 8.1 | MigrationGuide/New constants: add missing constants [5] While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium xchacha* functions, does declare a couple of new constants as well... Refs: * php/php-src#6868 * php/php-src@f7f1f7f#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR352-R357 While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium ristretto255* functions, also declares a number of new constants as well... Refs: * php/php-src#6922 * php/php-src@9b794f8#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR368-R381 Co-authored-by: jrfnl <jrfnl@users.noreply.github.com> Closes phpGH-1449.

nikic reviewed Apr 15, 2021

View reviewed changes

paragonie-security force-pushed the sodium-stream-xchacha20 branch from 61ac3b6 to 86254fd Compare April 15, 2021 14:47

paragonie-security added 3 commits April 15, 2021 10:54

Regenerate libsodium_arginfo.h

ede48d5

Don't break old libsodium versions

f6bddc3

Use the new macros

f99a196

nikic reviewed Apr 16, 2021

View reviewed changes

Add zend_string_checked_alloc

bc9e80b

jedisct1/libsodium-php@75701f2

nikic approved these changes Apr 19, 2021

View reviewed changes

nikic merged commit f7f1f7f into php:master Apr 19, 2021

paragonie-security deleted the sodium-stream-xchacha20 branch April 21, 2021 07:49

paragonie-security added a commit to paragonie/php-src that referenced this pull request May 7, 2021

Update UPGRADING to document sodium changes

1ada95d

Also includes the UPGRADING changes for php#6868

jrfnl mentioned this pull request Mar 9, 2022

PHP 8.1 | NewFunctions: account for PHP 8.1 changes PHPCompatibility/PHPCompatibility#1325

Merged

jrfnl mentioned this pull request Mar 11, 2022

PHP 8.1 | NewConstants: account for PHP 8.1 changes PHPCompatibility/PHPCompatibility#1324

Merged

jrfnl mentioned this pull request Mar 11, 2022

PHP 8.1 | MigrationGuide/New constants: add missing constants php/doc-en#1449

Merged

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Add crypto_stream_xchacha20 to ext/sodium #6868

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Add crypto_stream_xchacha20 to ext/sodium #6868

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