OpenSSL 에서 제공하는 난수발생기 CTR-DRBG의 인스턴스를 생성하는 함수
RAND_DRBG *RAND_DRBG_new(int type, unsigned int flags, RAND_DRBG *parent);OpenSSL의 CTR-DRBG 는 AES를 기반으로 구현되므로 첫번째 매개변수 int type 키 크기와 같이 128, 192, 256 비트의 AES로 나뉜다.
Currently, all DRBG types are based on AES-CTR, so type can be one of the following values: NID_aes_128_ctr, NID_aes_192_ctr, NID_aes_256_ctr. Before the DRBG can be used to generate random bits, it is necessary to set its type and to instantiate it.
출처 : https://www.openssl.org/docs/man1.1.1/man3/RAND_DRBG_new.html
/docs/man1.1.1/man3/RAND_DRBG_new.html
NAME RAND_DRBG_new, RAND_DRBG_secure_new, RAND_DRBG_set, RAND_DRBG_set_defaults, RAND_DRBG_instantiate, RAND_DRBG_uninstantiate, RAND_DRBG_free - initialize and cleanup a RAND_DRBG instance SYNOPSIS #include RAND_DRBG *RAND_DRBG_new(int type, unsigned int
www.openssl.org
예를 들어 NID_aes_128_ctr 은 904로 정의되어 있는데 단순한 넘버링인 듯 하다.
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