OpenSSL v3.0 deprecated fuctions

[sats0k]

Some of the warnings

src/util.h:392:20: warning: ‘int SHA256_Init(SHA256_CTX*)’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  392 |         SHA256_Init(&ctx);
      |         ~~~~~~~~~~~^~~~~~

deprecated: SHA256_Init, SHA256_Update, SHA256_Final

src/util.h:469:14: warning: ‘unsigned char* RIPEMD160(const unsigned char*, size_t, unsigned char*)’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  469 |     RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
      |     ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

deprecated: RIPEMD160

src/key.cpp:36:27: warning: ‘int EC_KEY_set_private_key(EC_KEY*, const BIGNUM*)’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   36 |     EC_KEY_set_private_key(eckey,priv_key);
      |     ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~

deprecated: EC_KEY_set_private_key, EC_KEY_set_conv_form, EC_KEY_set_public_key, EC_KEY_free

src/key.cpp:269:33: warning: ‘int i2d_ECPrivateKey(const EC_KEY*, unsigned char**)’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  269 |     int nSize = i2d_ECPrivateKey(pkey, NULL);
      |                 ~~~~~~~~~~~~~~~~^~~~~~~~~~~~

deprecated: i2d_ECPrivateKey, o2i_ECPublicKey

src/key.cpp:308:36: warning: ‘int ECDSA_size(const EC_KEY*)’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  308 |     unsigned int nSize = ECDSA_size(pkey);
      |                          ~~~~~~~~~~^~~~~~

deprecated: ECDSA_size, ECDSA_sign, ECDSA_do_sign, ECDSA_verify

The deprecated functions are still present and you may still use them. However be aware that they may be removed from a future version of OpenSSL. Shitch from the low level APIs to EVP APIs, this require to rewrite your code to use the high level APIs instead.