salt length below the minimum value. It is otherwise similar to the <b>RSA</b> operation except detection of the salt length (using RSA_PSS_SALTLEN_AUTO) is not supported for verification if the key has usage restrictions.</p>

<p>The <a href="../man3/EVP_PKEY_CTX_set_signature_md.html">EVP_PKEY_CTX_set_signature_md(3)</a> and <a href="../man3/EVP_PKEY_CTX_set_rsa_mgf1_md.html">EVP_PKEY_CTX_set_rsa_mgf1_md(3)</a> functions are used to set the digest and MGF1 algorithms respectively. If the key has usage res