Signature Algorithms

OPENSSL_ALGO_SHA1 (integer)
Used as default algorithm by openssl_sign() and openssl_verify().
OPENSSL_ALGO_MD5 (integer)
OPENSSL_ALGO_MD4 (integer)
OPENSSL_ALGO_MD2 (integer)

Замечание: These constants were added in 5.0.0.

Коментарии

It should be noted that the default signature algorithm used by openssl_sign() and openssl_verify (OPENSSL_ALGO_SHA1) is no longer supported by default in OpenSSL Version 3 series.

With an up to date OpenSSL library, one has to run
"update-crypto-policies --set LEGACY"
on the server where the library resides in order to allow these functions to work without the optional alternative algorithm argument.
2023-07-11 13:38:25
http://php5.kiev.ua/manual/ru/openssl.signature-algos.html

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