RAND(7ssl) OpenSSL RAND(7ssl) RAND - OpenSSL . (CSPRNG). . OpenSSL RAND (DRBG) [NIST SP 800-90A Rev. 1]. () . . RAND_bytes(3) . : RAND_bytes(3) . () () . CSPRNG . EVP_RAND(7). RAND_priv_bytes(3) . '' CSPRNG. CSPRNG ( ) CSPRNG '' . RAND EVP_RAND(3) . . RAND RAND_bytes(3) . RAND_set1_random_provider(3) random_provider config(5). RAND_bytes(3). RAND OpenSSL (DRBG) EVP_RAND. DRBG (CSPRNG) [NIST SP 800-90A Rev. 1]. RAND_bytes(3) RAND_priv_bytes(3) EVP_RAND(3) RAND_get0_primary(3) config(5) EVP_RAND(7) RAND_set1_random_provider(3). 2018-2025 OpenSSL. . Apache 2.0 ( ""). . LICENSE . 3 . . : . 3.6.2 7 2026 RAND(7ssl)