t;openssl/evp.h&gt;

 int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx);
 int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX *ctx,
                                     const OSSL_PARAM params[]);
 int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
                             unsigned char *rout, size_t *routlen,
                             const unsigned char *sig, size_t siglen);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>EVP_PKEY_verify_recover_init() initializes a public key algorithm context 