EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) nothrow
enum EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN = (EVP_PKEY_ALG_CTRL + 1);

Meta