gistfile1.txt

SSL_ctrl(): (0 on error, 1 or length otherwise)
    SSL_CTX_add_extra_chain_cert
    SSL_CTX_set_tmp_ecdh
    SSL_set_tlsext_host_name(c.ssl, cname)

0 on error, 1 on success
    ASN1_INTEGER_set(C.X509_get_serialNumber(c.x), C.long(serial))
    EVP_DecryptUpdate
    EVP_EncryptUpdate
    EVP_PKEY_assign(key, C.EVP_PKEY_RSA, unsafe.Pointer(rsa))
    EVP_PKEY_set1_RSA
    i2d_RSA_PUBKEY_bio
    i2d_RSAPrivateKey_bio
    SSL_CTX_load_verify_locations
    SSL_CTX_set_cipher_list(c.ctx, clist)
    SSL_CTX_use_certificate
    SSL_CTX_use_PrivateKey
    X509_NAME_add_entry_by_txt()
    X509_NAME_set
    X509_PUBKEY_set
    X509_set_issuer_name(c.x, name.name)
    X509_set_pubkey(c.x, pubKey.evpPKey())
    X509_set_subject_name(c.x, name.name)
    X509_STORE_add_cert

ASN1_item_sign_ctx(): 0 on error, otherwise len(signature)
    X509_sign(c.x, privKey.evpPKey(), md)

returns a pointer?
    X509_add_ext(c.x, ex, -1)

0 on error, unknown otherwise
    ENGINE_init(e.e)
    EVP_CIPHER_CTX_ctrl

0 on error, >= 1 otherwise (length related?)
    PEM_write_bio_RSA_PUBKEY
    PEM_write_bio_RSAPrivateKey
    PEM_write_bio_X509