encrypt_init
int (*encrypt_init)(EVP_PKEY_CTX *ctx);
if (!ctx->pmeth->encrypt_init)
ret = ctx->pmeth->encrypt_init(ctx);
int (*encrypt_init)(EVP_PKEY_CTX *ctx),
pmeth->encrypt_init = encrypt_init;
int (*encrypt_init)(EVP_PKEY_CTX *ctx),
void encrypt_init(const char *, int);
encrypt_init(name, server);