crypto: avoid warnings about too-long initializer strings
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Authored by dim on Dec 26 2025, 12:14 AM.

Details

Reviewers

cperciva
jhb
markj

Commits

rGf5b76cb51e2c: crypto: avoid warnings about too-long initializer strings
rG752d056fce33: crypto: avoid warnings about too-long initializer strings
rGc17271f92431: crypto: avoid warnings about too-long initializer strings
rG710ec409dffe: crypto: avoid warnings about too-long initializer strings

Summary

Mark sigma and tau as __non_string, to avoid warnings from
clang 21 similar to:

sys/crypto/chacha20/chacha.c:53:31: error: initializer-string for character array is too long, array size is 16 but initializer has size 17 (including the null terminating character); did you mean to use the 'nonstring' attribute? [-Werror,-Wunterminated-string-initialization]
   53 | static const char sigma[16] = "expand 32-byte k";
      |                               ^~~~~~~~~~~~~~~~~~
sys/crypto/chacha20/chacha.c:54:29: error: initializer-string for character array is too long, array size is 16 but initializer has size 17 (including the null terminating character); did you mean to use the 'nonstring' attribute? [-Werror,-Wunterminated-string-initialization]
   54 | static const char tau[16] = "expand 16-byte k";
      |                             ^~~~~~~~~~~~~~~~~~

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