ormed using the same parameters.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>EVP_PKEY_verify_init() and EVP_PKEY_verify() return 1 if the verification was successful and 0 if it failed. Unlike other functions the return value 0 from EVP_PKEY_verify() only indicates that the signature did not verify successfully (that is tbs did not match the original data or the signature was of invalid form) it is not an indication of a more serious error.</p>

<p>A negative value indicates an error other that signa