1 #include "ossl_random.hpp" 2 3 extern "C" 4 { 5 #include <openssl/rand.h> 6 } 7 8 #include <boost/uuid/random_generator.hpp> 9 #include <boost/uuid/uuid_io.hpp> 10 11 #include <array> 12 #include <random> 13 #include <string> 14 15 namespace bmcweb 16 { 17 uint8_t OpenSSLGenerator::operator()() 18 { 19 uint8_t index = 0; 20 int rc = RAND_bytes(&index, sizeof(index)); 21 if (rc != opensslSuccess) 22 { 23 BMCWEB_LOG_ERROR("Cannot get random number"); 24 err = true; 25 } 26 27 return index; 28 } 29 30 std::string getRandomUUID() 31 { 32 using bmcweb::OpenSSLGenerator; 33 OpenSSLGenerator ossl; 34 return boost::uuids::to_string( 35 boost::uuids::basic_random_generator<OpenSSLGenerator>(ossl)()); 36 } 37 38 std::string getRandomIdOfLength(size_t length) 39 { 40 static constexpr std::array<char, 62> alphanum = { 41 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 42 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 43 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 44 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 45 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'}; 46 47 std::string token; 48 token.resize(length, '0'); 49 std::uniform_int_distribution<size_t> dist(0, alphanum.size() - 1); 50 51 bmcweb::OpenSSLGenerator gen; 52 53 for (char& tokenChar : token) 54 { 55 tokenChar = alphanum[dist(gen)]; 56 if (gen.error()) 57 { 58 return ""; 59 } 60 } 61 return token; 62 } 63 } // namespace bmcweb 64