OpenSSL deprecation warnings

[vvbohdan]

Description
During the build there are some warnings about usage of deprecated OpenSSL functionality.

Use case
We want to replace deprecated functionality with the new one, to use latest version and don't have warnings.

Additional Context
src/common/SSLUtil.cc: In function 'int ssl_util::rsa_public_encrypt(const std::string&, std::string&)': src/common/SSLUtil.cc:271:40: warning: 'RSA* PEM_read_RSAPublicKey(FILE*, RSA**, int (*)(char*, int, int, void*), void*)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 271 | rsa = PEM_read_RSAPublicKey(fp, &rsa, nullptr, nullptr); | ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from src/common/SSLUtil.cc:21: /usr/include/openssl/pem.h:452:1: note: declared here 452 | DECLARE_PEM_rw_attr(OSSL_DEPRECATEDIN_3_0, RSAPublicKey, RSA) | ^~~~~~~~~~~~~~~~~~~ src/common/SSLUtil.cc:281:63: warning: 'int RSA_size(const RSA*)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 281 | char * out_c = (char *) malloc(sizeof(char) * RSA_size(rsa)); | ~~~~~~~~^~~~~ In file included from src/common/SSLUtil.cc:20: /usr/include/openssl/rsa.h:215:27: note: declared here 215 | OSSL_DEPRECATEDIN_3_0 int RSA_size(const RSA *rsa); | ^~~~~~~~ src/common/SSLUtil.cc:283:36: warning: 'int RSA_public_encrypt(int, const unsigned char*, unsigned char*, RSA*, int)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 283 | int rc = RSA_public_encrypt(in.length(), (const unsigned char *) in.c_str(), | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 284 | (unsigned char *) out_c, rsa, RSA_PKCS1_PADDING); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/openssl/rsa.h:293:5: note: declared here 293 | int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to, | ^~~~~~~~~~~~~~~~~~ src/common/SSLUtil.cc: In function 'int ssl_util::rsa_private_decrypt(const std::string&, std::string&)': src/common/SSLUtil.cc:316:41: warning: 'RSA* PEM_read_RSAPrivateKey(FILE*, RSA**, int (*)(char*, int, int, void*), void*)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 316 | rsa = PEM_read_RSAPrivateKey(fp, &rsa, nullptr, nullptr); | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/openssl/pem.h:451:1: note: declared here 451 | DECLARE_PEM_rw_cb_attr(OSSL_DEPRECATEDIN_3_0, RSAPrivateKey, RSA) | ^~~~~~~~~~~~~~~~~~~~~~ src/common/SSLUtil.cc:328:32: warning: 'int RSA_size(const RSA*)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 328 | int key_size = RSA_size(rsa); | ~~~~~~~~^~~~~ /usr/include/openssl/rsa.h:215:27: note: declared here 215 | OSSL_DEPRECATEDIN_3_0 int RSA_size(const RSA *rsa); | ^~~~~~~~ src/common/SSLUtil.cc:330:63: warning: 'int RSA_size(const RSA*)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 330 | char * out_c = (char *) malloc(sizeof(char) * RSA_size(rsa)); | ~~~~~~~~^~~~~ /usr/include/openssl/rsa.h:215:27: note: declared here 215 | OSSL_DEPRECATEDIN_3_0 int RSA_size(const RSA *rsa); | ^~~~~~~~ src/common/SSLUtil.cc:343:41: warning: 'int RSA_private_decrypt(int, const unsigned char*, unsigned char*, RSA*, int)' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations] 343 | int rc = RSA_private_decrypt(block_size, (const unsigned char *) | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 344 | in_c + index, (unsigned char *) out_c, rsa, RSA_PKCS1_PADDING); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/openssl/rsa.h:302:5: note: declared here 302 | int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to, | ^~~~~~~~~~~~~~~~~~~

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)