PKCS7_encrypt
LCRYPTO_USED(PKCS7_encrypt);
LCRYPTO_ALIAS(PKCS7_encrypt);
PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
p7 = PKCS7_encrypt(certs, bio_content, cipher, 0);
p7 = PKCS7_encrypt(encerts, in, cfg.cipher,