Deprecated functions in OpenSSL v3.0

[atoppi]

OpenSSL v3.0 is the only version shipped in Ubuntu 22.04.
While compiling Janus we found out that some functions used in dtls.c are now deprecated in OpenSSL v3.0.

See openssl 3.0 migration docs for guidelines.

Janus commit: c3190246

dtls.c:216 warning: ‘RSA_new’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:223 warning: ‘RSA_generate_key_ex’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:228 warning: ‘EVP_PKEY_assign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:237 warning: ‘EC_KEY_new_by_curve_name’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:242 warning: ‘EC_KEY_set_asn1_flag’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:245 warning: ‘EC_KEY_generate_key’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:250 warning: ‘EVP_PKEY_assign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:311 warning: ‘RSA_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:313 warning: ‘EC_KEY_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:588 warning: ‘EC_KEY_new_by_curve_name’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
dtls.c:598 warning: ‘EC_KEY_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]