Refactor openssl-sys

The old layout tried to structure itself by version but it ended up with
a lot of duplication. Instead, follow the structure of the header files.

1 files changed, 989 insertions, 0 deletions

diff --git a/openssl-sys/src/ossl_typ.rs b/openssl-sys/src/ossl_typ.rs
new file mode 100644
index 00000000..58cab8d7
--- /dev/null
+++ b/openssl-sys/src/ossl_typ.rs
@@ -0,0 +1,989 @@
+use libc::*;
+
+#[allow(unused_imports)]
+use *;
+
+pub enum ASN1_INTEGER {}
+pub enum ASN1_GENERALIZEDTIME {}
+pub enum ASN1_STRING {}
+pub enum ASN1_BIT_STRING {}
+pub enum ASN1_TIME {}
+pub enum ASN1_TYPE {}
+pub enum ASN1_OBJECT {}
+
+pub enum bio_st {} // FIXME remove
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum BIO {}
+    } else {
+        #[repr(C)]
+        pub struct BIO {
+            pub method: *mut BIO_METHOD,
+            pub callback: Option<
+                unsafe extern "C" fn(*mut BIO, c_int, *const c_char, c_int, c_long, c_long) -> c_long,
+            >,
+            pub cb_arg: *mut c_char,
+            pub init: c_int,
+            pub shutdown: c_int,
+            pub flags: c_int,
+            pub retry_reason: c_int,
+            pub num: c_int,
+            pub ptr: *mut c_void,
+            pub next_bio: *mut BIO,
+            pub prev_bio: *mut BIO,
+            pub references: c_int,
+            pub num_read: c_ulong,
+            pub num_write: c_ulong,
+            pub ex_data: CRYPTO_EX_DATA,
+        }
+    }
+}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum BIGNUM {}
+    } else {
+        #[repr(C)]
+        pub struct BIGNUM {
+            pub d: *mut BN_ULONG,
+            pub top: c_int,
+            pub dmax: c_int,
+            pub neg: c_int,
+            pub flags: c_int,
+        }
+    }
+}
+pub enum BN_BLINDING {}
+pub enum BN_MONT_CTX {}
+
+pub enum BN_CTX {}
+pub enum BN_GENCB {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum EVP_CIPHER {}
+    } else {
+        #[repr(C)]
+        pub struct EVP_CIPHER {
+            pub nid: c_int,
+            pub block_size: c_int,
+            pub key_len: c_int,
+            pub iv_len: c_int,
+            pub flags: c_ulong,
+            pub init: Option<
+                unsafe extern "C" fn(*mut EVP_CIPHER_CTX, *const c_uchar, *const c_uchar, c_int) -> c_int,
+            >,
+            pub do_cipher: Option<
+                unsafe extern "C" fn(*mut EVP_CIPHER_CTX, *mut c_uchar, *const c_uchar, size_t) -> c_int,
+            >,
+            pub cleanup: Option<unsafe extern "C" fn(*mut EVP_CIPHER_CTX) -> c_int>,
+            pub ctx_size: c_int,
+            pub set_asn1_parameters:
+                Option<unsafe extern "C" fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>,
+            pub get_asn1_parameters:
+                Option<unsafe extern "C" fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>,
+            pub ctrl:
+                Option<unsafe extern "C" fn(*mut EVP_CIPHER_CTX, c_int, c_int, *mut c_void) -> c_int>,
+            pub app_data: *mut c_void,
+        }
+    }
+}
+pub enum EVP_CIPHER_CTX {}
+pub enum EVP_MD {}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum EVP_MD_CTX {}
+    } else {
+        #[repr(C)]
+        pub struct EVP_MD_CTX {
+            digest: *mut EVP_MD,
+            engine: *mut ENGINE,
+            flags: c_ulong,
+            md_data: *mut c_void,
+            pctx: *mut EVP_PKEY_CTX,
+            update: *mut c_void,
+        }
+    }
+}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum EVP_PKEY {}
+    } else {
+        #[repr(C)]
+        pub struct EVP_PKEY {
+            pub type_: c_int,
+            pub save_type: c_int,
+            pub references: c_int,
+            pub ameth: *const EVP_PKEY_ASN1_METHOD,
+            pub engine: *mut ENGINE,
+            pub pkey: *mut c_void,
+            pub save_parameters: c_int,
+            pub attributes: *mut stack_st_X509_ATTRIBUTE,
+        }
+    }
+}
+
+pub enum EVP_PKEY_ASN1_METHOD {}
+
+pub enum EVP_PKEY_CTX {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum HMAC_CTX {}
+    } else {
+        #[repr(C)]
+        pub struct HMAC_CTX {
+            md: *mut EVP_MD,
+            md_ctx: EVP_MD_CTX,
+            i_ctx: EVP_MD_CTX,
+            o_ctx: EVP_MD_CTX,
+            key_length: c_uint,
+            key: [c_uchar; 128],
+        }
+    }
+}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum DH {}
+    } else {
+        #[repr(C)]
+        pub struct DH {
+            pub pad: c_int,
+            pub version: c_int,
+            pub p: *mut ::BIGNUM,
+            pub g: *mut ::BIGNUM,
+            pub length: c_long,
+            pub pub_key: *mut ::BIGNUM,
+            pub priv_key: *mut ::BIGNUM,
+            pub flags: c_int,
+            pub method_mont_p: *mut ::BN_MONT_CTX,
+            pub q: *mut ::BIGNUM,
+            pub j: *mut ::BIGNUM,
+            pub seed: *mut c_uchar,
+            pub seedlen: c_int,
+            pub counter: *mut ::BIGNUM,
+            pub references: c_int,
+            pub ex_data: ::CRYPTO_EX_DATA,
+            pub meth: *const ::DH_METHOD,
+            pub engine: *mut ::ENGINE,
+        }
+    }
+}
+pub enum DH_METHOD {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum DSA {}
+    } else {
+        #[repr(C)]
+        pub struct DSA {
+            pub pad: c_int,
+            pub version: c_long,
+            pub write_params: c_int,
+
+            pub p: *mut BIGNUM,
+            pub q: *mut BIGNUM,
+            pub g: *mut BIGNUM,
+            pub pub_key: *mut BIGNUM,
+            pub priv_key: *mut BIGNUM,
+            pub kinv: *mut BIGNUM,
+            pub r: *mut BIGNUM,
+
+            pub flags: c_int,
+            pub method_mont_p: *mut BN_MONT_CTX,
+            pub references: c_int,
+            pub ex_data: CRYPTO_EX_DATA,
+            pub meth: *const DSA_METHOD,
+            pub engine: *mut ENGINE,
+        }
+    }
+}
+pub enum DSA_METHOD {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum RSA {}
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct RSA {
+            pub pad: c_int,
+            pub version: c_long,
+            pub meth: *const ::RSA_METHOD,
+
+            pub engine: *mut ::ENGINE,
+            pub n: *mut ::BIGNUM,
+            pub e: *mut ::BIGNUM,
+            pub d: *mut ::BIGNUM,
+            pub p: *mut ::BIGNUM,
+            pub q: *mut ::BIGNUM,
+            pub dmp1: *mut ::BIGNUM,
+            pub dmq1: *mut ::BIGNUM,
+            pub iqmp: *mut ::BIGNUM,
+
+            pub ex_data: ::CRYPTO_EX_DATA,
+            pub references: c_int,
+            pub flags: c_int,
+
+            pub _method_mod_n: *mut ::BN_MONT_CTX,
+            pub _method_mod_p: *mut ::BN_MONT_CTX,
+            pub _method_mod_q: *mut ::BN_MONT_CTX,
+
+            pub blinding: *mut ::BN_BLINDING,
+            pub mt_blinding: *mut ::BN_BLINDING,
+        }
+    } else {
+        #[repr(C)]
+        pub struct RSA {
+            pub pad: c_int,
+            pub version: c_long,
+            pub meth: *const ::RSA_METHOD,
+
+            pub engine: *mut ::ENGINE,
+            pub n: *mut ::BIGNUM,
+            pub e: *mut ::BIGNUM,
+            pub d: *mut ::BIGNUM,
+            pub p: *mut ::BIGNUM,
+            pub q: *mut ::BIGNUM,
+            pub dmp1: *mut ::BIGNUM,
+            pub dmq1: *mut ::BIGNUM,
+            pub iqmp: *mut ::BIGNUM,
+
+            pub ex_data: ::CRYPTO_EX_DATA,
+            pub references: c_int,
+            pub flags: c_int,
+
+            pub _method_mod_n: *mut ::BN_MONT_CTX,
+            pub _method_mod_p: *mut ::BN_MONT_CTX,
+            pub _method_mod_q: *mut ::BN_MONT_CTX,
+
+            pub bignum_data: *mut c_char,
+            pub blinding: *mut ::BN_BLINDING,
+            pub mt_blinding: *mut ::BN_BLINDING,
+        }
+    }
+}
+pub enum RSA_METHOD {}
+
+pub enum EC_KEY {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum X509 {}
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct X509 {
+            pub cert_info: *mut X509_CINF,
+            pub sig_alg: *mut ::X509_ALGOR,
+            pub signature: *mut ::ASN1_BIT_STRING,
+            pub valid: c_int,
+            pub references: c_int,
+            pub name: *mut c_char,
+            pub ex_data: ::CRYPTO_EX_DATA,
+            pub ex_pathlen: c_long,
+            pub ex_pcpathlen: c_long,
+            pub ex_flags: c_ulong,
+            pub ex_kusage: c_ulong,
+            pub ex_xkusage: c_ulong,
+            pub ex_nscert: c_ulong,
+            skid: *mut c_void,
+            akid: *mut c_void,
+            policy_cache: *mut c_void,
+            crldp: *mut c_void,
+            altname: *mut c_void,
+            nc: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_SHA"))]
+            sha1_hash: [c_uchar; 20],
+            aux: *mut c_void,
+        }
+    } else {
+        #[repr(C)]
+        pub struct X509 {
+            pub cert_info: *mut X509_CINF,
+            pub sig_alg: *mut X509_ALGOR,
+            pub signature: *mut ASN1_BIT_STRING,
+            pub valid: c_int,
+            pub references: c_int,
+            pub name: *mut c_char,
+            pub ex_data: CRYPTO_EX_DATA,
+            pub ex_pathlen: c_long,
+            pub ex_pcpathlen: c_long,
+            pub ex_flags: c_ulong,
+            pub ex_kusage: c_ulong,
+            pub ex_xkusage: c_ulong,
+            pub ex_nscert: c_ulong,
+            skid: *mut c_void,
+            akid: *mut c_void,
+            policy_cache: *mut c_void,
+            crldp: *mut c_void,
+            altname: *mut c_void,
+            nc: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_RFC3779"))]
+            rfc3779_addr: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_RFC3779"))]
+            rfc3779_asid: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_SHA"))]
+            sha1_hash: [c_uchar; 20],
+            aux: *mut c_void,
+        }
+    }
+}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum X509_ALGOR {}
+    } else {
+        #[repr(C)]
+        pub struct X509_ALGOR {
+            pub algorithm: *mut ::ASN1_OBJECT,
+            parameter: *mut c_void,
+        }
+    }
+}
+pub enum X509_CRL {}
+pub enum X509_NAME {}
+pub enum X509_STORE {}
+pub enum X509_STORE_CTX {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum X509_VERIFY_PARAM {} 
+    } else if #[cfg(libressl251)] {
+        #[repr(C)]
+        pub struct X509_VERIFY_PARAM {
+            pub name: *mut c_char,
+            pub check_time: time_t,
+            pub inh_flags: c_ulong,
+            pub flags: c_ulong,
+            pub purpose: c_int,
+            pub trust: c_int,
+            pub depth: c_int,
+            pub policies: *mut stack_st_ASN1_OBJECT,
+            id: *mut c_void,
+        }
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct X509_VERIFY_PARAM {
+            pub name: *mut c_char,
+            pub check_time: time_t,
+            pub inh_flags: c_ulong,
+            pub flags: c_ulong,
+            pub purpose: c_int,
+            pub trust: c_int,
+            pub depth: c_int,
+            pub policies: *mut stack_st_ASN1_OBJECT,
+            //pub id: *mut X509_VERIFY_PARAM_ID,
+        }
+    } else if #[cfg(ossl102)] {
+        #[repr(C)]
+        pub struct X509_VERIFY_PARAM {
+            pub name: *mut c_char,
+            pub check_time: time_t,
+            pub inh_flags: c_ulong,
+            pub flags: c_ulong,
+            pub purpose: c_int,
+            pub trust: c_int,
+            pub depth: c_int,
+            pub policies: *mut stack_st_ASN1_OBJECT,
+            pub id: *mut X509_VERIFY_PARAM_ID,
+        }
+    }
+}
+
+#[repr(C)]
+pub struct X509V3_CTX {
+    flags: c_int,
+    issuer_cert: *mut c_void,
+    subject_cert: *mut c_void,
+    subject_req: *mut c_void,
+    crl: *mut c_void,
+    db_meth: *mut c_void,
+    db: *mut c_void,
+    // I like the last comment line, it is copied from OpenSSL sources:
+    // Maybe more here
+}
+pub enum CONF {}
+#[cfg(ossl110)]
+pub enum OPENSSL_INIT_SETTINGS {}
+
+pub enum ENGINE {}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum SSL {}
+    } else if #[cfg(libressl251)] {
+        #[repr(C)]
+        pub struct SSL {
+            version: c_int,
+            method: *const ::SSL_METHOD,
+            rbio: *mut ::BIO,
+            wbio: *mut ::BIO,
+            bbio: *mut ::BIO,
+            pub server: c_int,
+            s3: *mut c_void,
+            d1: *mut c_void,
+            param: *mut c_void,
+            cipher_list: *mut stack_st_SSL_CIPHER,
+            cert: *mut c_void,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; ::SSL_MAX_SID_CTX_LENGTH as usize],
+            session: *mut ::SSL_SESSION,
+            verify_mode: c_int,
+            error: c_int,
+            error_code: c_int,
+            ctx: *mut ::SSL_CTX,
+            verify_result: c_long,
+            references: c_int,
+            client_version: c_int,
+            max_send_fragment: c_uint,
+            tlsext_hostname: *mut c_char,
+            tlsext_status_type: c_int,
+            initial_ctx: *mut ::SSL_CTX,
+            enc_read_ctx: *mut ::EVP_CIPHER_CTX,
+            read_hash: *mut EVP_MD_CTX,
+            internal: *mut c_void,
+        }
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct SSL {
+            version: c_int,
+            type_: c_int,
+            method: *const ::SSL_METHOD,
+            rbio: *mut c_void,
+            wbio: *mut c_void,
+            bbio: *mut c_void,
+            rwstate: c_int,
+            in_handshake: c_int,
+            handshake_func: Option<unsafe extern "C" fn(*mut SSL) -> c_int>,
+            pub server: c_int,
+            new_session: c_int,
+            quiet_shutdown: c_int,
+            shutdown: c_int,
+            state: c_int,
+            rstate: c_int,
+            init_buf: *mut c_void,
+            init_msg: *mut c_void,
+            init_num: c_int,
+            init_off: c_int,
+            packet: *mut c_uchar,
+            packet_length: c_uint,
+            s3: *mut c_void,
+            d1: *mut c_void,
+            read_ahead: c_int,
+            msg_callback: Option<
+                unsafe extern "C" fn(c_int,
+                                    c_int,
+                                    c_int,
+                                    *const c_void,
+                                    size_t,
+                                    *mut SSL,
+                                    *mut c_void),
+            >,
+            msg_callback_arg: *mut c_void,
+            hit: c_int,
+            param: *mut c_void,
+            cipher_list: *mut stack_st_SSL_CIPHER,
+            cipher_list_by_id: *mut stack_st_SSL_CIPHER,
+            mac_flags: c_int,
+            aead_read_ctx: *mut c_void,
+            enc_read_ctx: *mut ::EVP_CIPHER_CTX,
+            read_hash: *mut ::EVP_MD_CTX,
+            aead_write_ctx: *mut c_void,
+            enc_write_ctx: *mut ::EVP_CIPHER_CTX,
+            write_hash: *mut ::EVP_MD_CTX,
+            cert: *mut c_void,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; ::SSL_MAX_SID_CTX_LENGTH as usize],
+            session: *mut ::SSL_SESSION,
+            generate_session_id: ::GEN_SESSION_CB,
+            verify_mode: c_int,
+            verify_callback: Option<unsafe extern "C" fn(c_int, *mut ::X509_STORE_CTX) -> c_int>,
+            info_callback: Option<unsafe extern "C" fn(*mut SSL, c_int, c_int)>,
+            error: c_int,
+            error_code: c_int,
+            ctx: *mut ::SSL_CTX,
+            debug: c_int,
+            verify_result: c_long,
+            ex_data: ::CRYPTO_EX_DATA,
+            client_CA: *mut stack_st_X509_NAME,
+            references: c_int,
+            options: c_ulong,
+            mode: c_ulong,
+            max_cert_list: c_long,
+            first_packet: c_int,
+            client_version: c_int,
+            max_send_fragment: c_uint,
+            tlsext_debug_cb:
+                Option<unsafe extern "C" fn(*mut SSL, c_int, c_int, *mut c_uchar, c_int, *mut c_void)>,
+            tlsext_debug_arg: *mut c_void,
+            tlsext_hostname: *mut c_char,
+            servername_done: c_int,
+            tlsext_status_type: c_int,
+            tlsext_status_expected: c_int,
+            tlsext_ocsp_ids: *mut c_void,
+            tlsext_ocsp_exts: *mut c_void,
+            tlsext_ocsp_resp: *mut c_uchar,
+            tlsext_ocsp_resplen: c_int,
+            tlsext_ticket_expected: c_int,
+            tlsext_ecpointformatlist_length: size_t,
+            tlsext_ecpointformatlist: *mut c_uchar,
+            tlsext_ellipticcurvelist_length: size_t,
+            tlsext_ellipticcurvelist: *mut c_uchar,
+            tlsext_session_ticket: *mut c_void,
+            tlsext_session_ticket_ext_cb: ::tls_session_ticket_ext_cb_fn,
+            tls_session_ticket_ext_cb_arg: *mut c_void,
+            tls_session_secret_cb: ::tls_session_secret_cb_fn,
+            tls_session_secret_cb_arg: *mut c_void,
+            initial_ctx: *mut ::SSL_CTX,
+            next_proto_negotiated: *mut c_uchar,
+            next_proto_negotiated_len: c_uchar,
+            srtp_profiles: *mut c_void,
+            srtp_profile: *mut c_void,
+            tlsext_heartbeat: c_uint,
+            tlsext_hb_pending: c_uint,
+            tlsext_hb_seq: c_uint,
+            alpn_client_proto_list: *mut c_uchar,
+            alpn_client_proto_list_len: c_uint,
+            renegotiate: c_int,
+        }
+    } else {
+        #[repr(C)]
+        pub struct SSL {
+            version: c_int,
+            type_: c_int,
+            method: *const ::SSL_METHOD,
+            rbio: *mut c_void,
+            wbio: *mut c_void,
+            bbio: *mut c_void,
+            rwstate: c_int,
+            in_handshake: c_int,
+            handshake_func: Option<unsafe extern "C" fn(*mut SSL) -> c_int>,
+            pub server: c_int,
+            new_session: c_int,
+            quiet_session: c_int,
+            shutdown: c_int,
+            state: c_int,
+            rstate: c_int,
+            init_buf: *mut c_void,
+            init_msg: *mut c_void,
+            init_num: c_int,
+            init_off: c_int,
+            packet: *mut c_uchar,
+            packet_length: c_uint,
+            s2: *mut c_void,
+            s3: *mut c_void,
+            d1: *mut c_void,
+            read_ahead: c_int,
+            msg_callback: Option<
+                unsafe extern "C" fn(c_int, c_int, c_int, *const c_void, size_t, *mut SSL, *mut c_void),
+            >,
+            msg_callback_arg: *mut c_void,
+            hit: c_int,
+            param: *mut c_void,
+            cipher_list: *mut stack_st_SSL_CIPHER,
+            cipher_list_by_id: *mut stack_st_SSL_CIPHER,
+            mac_flags: c_int,
+            enc_read_ctx: *mut ::EVP_CIPHER_CTX,
+            read_hash: *mut ::EVP_MD_CTX,
+            expand: *mut c_void,
+            enc_write_ctx: *mut ::EVP_CIPHER_CTX,
+            write_hash: *mut ::EVP_MD_CTX,
+            compress: *mut c_void,
+            cert: *mut c_void,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; ::SSL_MAX_SID_CTX_LENGTH as usize],
+            session: *mut ::SSL_SESSION,
+            generate_session_id: ::GEN_SESSION_CB,
+            verify_mode: c_int,
+            verify_callback: Option<unsafe extern "C" fn(c_int, *mut ::X509_STORE_CTX) -> c_int>,
+            info_callback: Option<unsafe extern "C" fn(*mut SSL, c_int, c_int)>,
+            error: c_int,
+            error_code: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_KRB5"))]
+            kssl_ctx: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_PSK"))]
+            psk_client_callback: Option<
+                unsafe extern "C" fn(*mut SSL, *const c_char, *mut c_char, c_uint, *mut c_uchar, c_uint)
+                    -> c_uint,
+            >,
+            #[cfg(not(osslconf = "OPENSSL_NO_PSK"))]
+            psk_server_callback:
+                Option<unsafe extern "C" fn(*mut SSL, *const c_char, *mut c_uchar, c_uint) -> c_uint>,
+            ctx: *mut ::SSL_CTX,
+            debug: c_int,
+            verify_result: c_long,
+            ex_data: ::CRYPTO_EX_DATA,
+            client_CA: *mut stack_st_X509_NAME,
+            references: c_int,
+            options: c_ulong,
+            mode: c_ulong,
+            max_cert_list: c_long,
+            first_packet: c_int,
+            client_version: c_int,
+            max_send_fragment: c_uint,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_debug_cb:
+                Option<unsafe extern "C" fn(*mut SSL, c_int, c_int, *mut c_uchar, c_int, *mut c_void)>,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_debug_arg: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_hostname: *mut c_char,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            servername_done: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_status_type: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_status_expected: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ocsp_ids: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ocsp_exts: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ocsp_resp: *mut c_uchar,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ocsp_resplen: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ticket_expected: c_int,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC")
+            ))]
+            tlsext_ecpointformatlist_length: size_t,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC")
+            ))]
+            tlsext_ecpointformatlist: *mut c_uchar,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC")
+            ))]
+            tlsext_ellipticcurvelist_length: size_t,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC")
+            ))]
+            tlsext_ellipticcurvelist: *mut c_uchar,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_opaque_prf_input: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_opaque_prf_input_len: size_t,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_session_ticket: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_session_ticket_ext_cb: ::tls_session_ticket_ext_cb_fn,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tls_session_ticket_ext_cb_arg: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tls_session_secret_cb: ::tls_session_secret_cb_fn,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tls_session_secret_cb_arg: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            initial_ctx: *mut ::SSL_CTX,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_proto_negotiated: *mut c_uchar,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_proto_negotiated_len: c_uchar,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            srtp_profiles: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            srtp_profile: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_heartbeat: c_uint,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_hb_pending: c_uint,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_hb_seq: c_uint,
+            renegotiate: c_int,
+            #[cfg(not(osslconf = "OPENSSL_NO_SRP"))]
+            srp_ctx: ::SRP_CTX,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_client_proto_list: *mut c_uchar,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_client_proto_list_len: c_uint,
+        }
+    }
+}
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum SSL_CTX {}
+    } else if #[cfg(libressl251)] {
+        #[repr(C)]
+        pub struct SSL_CTX {
+            method: *const ::SSL_METHOD,
+            cipher_list: *mut stack_st_SSL_CIPHER,
+            cert_store: *mut c_void,
+            session_timeout: c_long,
+            pub references: c_int,
+            extra_certs: *mut stack_st_X509,
+            verify_mode: c_int,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; ::SSL_MAX_SID_CTX_LENGTH as usize],
+            param: *mut ::X509_VERIFY_PARAM,
+            default_passwd_callback: *mut c_void,
+            default_passwd_callback_userdata: *mut c_void,
+            internal: *mut c_void,
+        }
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct SSL_CTX {
+            method: *mut c_void,
+            cipher_list: *mut c_void,
+            cipher_list_by_id: *mut c_void,
+            cert_store: *mut c_void,
+            sessions: *mut c_void,
+            session_cache_size: c_ulong,
+            session_cache_head: *mut c_void,
+            session_cache_tail: *mut c_void,
+            session_cache_mode: c_int,
+            session_timeout: c_long,
+            new_session_cb: *mut c_void,
+            remove_session_cb: *mut c_void,
+            get_session_cb: *mut c_void,
+            stats: [c_int; 11],
+            pub references: c_int,
+            app_verify_callback: *mut c_void,
+            app_verify_arg: *mut c_void,
+            default_passwd_callback: *mut c_void,
+            default_passwd_callback_userdata: *mut c_void,
+            client_cert_cb: *mut c_void,
+            app_gen_cookie_cb: *mut c_void,
+            app_verify_cookie_cb: *mut c_void,
+            ex_dat: ::CRYPTO_EX_DATA,
+            rsa_md5: *mut c_void,
+            md5: *mut c_void,
+            sha1: *mut c_void,
+            extra_certs: *mut c_void,
+            comp_methods: *mut c_void,
+            info_callback: *mut c_void,
+            client_CA: *mut c_void,
+            options: c_ulong,
+            mode: c_ulong,
+            max_cert_list: c_long,
+            cert: *mut c_void,
+            read_ahead: c_int,
+            msg_callback: *mut c_void,
+            msg_callback_arg: *mut c_void,
+            verify_mode: c_int,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; 32],
+            default_verify_callback: *mut c_void,
+            generate_session_id: *mut c_void,
+            param: *mut c_void,
+            quiet_shutdown: c_int,
+            max_send_fragment: c_uint,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_ENGINE"))]
+            client_cert_engine: *mut c_void,
+
+            tlsext_servername_callback: *mut c_void,
+            tlsect_servername_arg: *mut c_void,
+            tlsext_tick_key_name: [c_uchar; 16],
+            tlsext_tick_hmac_key: [c_uchar; 16],
+            tlsext_tick_aes_key: [c_uchar; 16],
+            tlsext_ticket_key_cb: *mut c_void,
+            tlsext_status_cb: *mut c_void,
+            tlsext_status_arg: *mut c_void,
+            tlsext_opaque_prf_input_callback: *mut c_void,
+            tlsext_opaque_prf_input_callback_arg: *mut c_void,
+
+            next_protos_advertised_cb: *mut c_void,
+            next_protos_advertised_cb_arg: *mut c_void,
+            next_proto_select_cb: *mut c_void,
+            next_proto_select_cb_arg: *mut c_void,
+
+            srtp_profiles: *mut c_void,
+        }
+    } else {
+        #[repr(C)]
+        pub struct SSL_CTX {
+            method: *mut c_void,
+            cipher_list: *mut c_void,
+            cipher_list_by_id: *mut c_void,
+            cert_store: *mut c_void,
+            sessions: *mut c_void,
+            session_cache_size: c_ulong,
+            session_cache_head: *mut c_void,
+            session_cache_tail: *mut c_void,
+            session_cache_mode: c_int,
+            session_timeout: c_long,
+            new_session_cb: *mut c_void,
+            remove_session_cb: *mut c_void,
+            get_session_cb: *mut c_void,
+            stats: [c_int; 11],
+            pub references: c_int,
+            app_verify_callback: *mut c_void,
+            app_verify_arg: *mut c_void,
+            default_passwd_callback: *mut c_void,
+            default_passwd_callback_userdata: *mut c_void,
+            client_cert_cb: *mut c_void,
+            app_gen_cookie_cb: *mut c_void,
+            app_verify_cookie_cb: *mut c_void,
+            ex_dat: ::CRYPTO_EX_DATA,
+            rsa_md5: *mut c_void,
+            md5: *mut c_void,
+            sha1: *mut c_void,
+            extra_certs: *mut c_void,
+            comp_methods: *mut c_void,
+            info_callback: *mut c_void,
+            client_CA: *mut c_void,
+            options: c_ulong,
+            mode: c_ulong,
+            max_cert_list: c_long,
+            cert: *mut c_void,
+            read_ahead: c_int,
+            msg_callback: *mut c_void,
+            msg_callback_arg: *mut c_void,
+            verify_mode: c_int,
+            sid_ctx_length: c_uint,
+            sid_ctx: [c_uchar; 32],
+            default_verify_callback: *mut c_void,
+            generate_session_id: *mut c_void,
+            param: *mut c_void,
+            quiet_shutdown: c_int,
+            max_send_fragment: c_uint,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_ENGINE"))]
+            client_cert_engine: *mut c_void,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_servername_callback: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsect_servername_arg: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_tick_key_name: [c_uchar; 16],
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_tick_hmac_key: [c_uchar; 16],
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_tick_aes_key: [c_uchar; 16],
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_ticket_key_cb: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_status_cb: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_status_arg: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_opaque_prf_input_callback: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_TLSEXT"))]
+            tlsext_opaque_prf_input_callback_arg: *mut c_void,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_PSK"))]
+            psk_identity_hint: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_PSK"))]
+            psk_client_callback: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_PSK"))]
+            psk_server_callback: *mut c_void,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_BUF_FREELISTS"))]
+            freelist_max_len: c_uint,
+            #[cfg(not(osslconf = "OPENSSL_NO_BUF_FREELISTS"))]
+            wbuf_freelist: *mut c_void,
+            #[cfg(not(osslconf = "OPENSSL_NO_BUF_FREELISTS"))]
+            rbuf_freelist: *mut c_void,
+
+            #[cfg(not(osslconf = "OPENSSL_NO_SRP"))]
+            srp_ctx: SRP_CTX,
+
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_protos_advertised_cb: *mut c_void,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_protos_advertised_cb_arg: *mut c_void,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_proto_select_cb: *mut c_void,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_NEXTPROTONEG")
+            ))]
+            next_proto_select_cb_arg: *mut c_void,
+
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl101))]
+            srtp_profiles: *mut c_void,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_select_cb: *mut c_void,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_select_cb_arg: *mut c_void,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_client_proto_list: *mut c_void,
+            #[cfg(all(not(osslconf = "OPENSSL_NO_TLSEXT"), ossl102))]
+            alpn_client_proto_list_len: c_uint,
+
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC"),
+                ossl102
+            ))]
+            tlsext_ecpointformatlist_length: size_t,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC"),
+                ossl102
+            ))]
+            tlsext_ecpointformatlist: *mut c_uchar,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC"),
+                ossl102
+            ))]
+            tlsext_ellipticcurvelist_length: size_t,
+            #[cfg(all(
+                not(osslconf = "OPENSSL_NO_TLSEXT"),
+                not(osslconf = "OPENSSL_NO_EC"),
+                ossl102
+            ))]
+            tlsext_ellipticcurvelist: *mut c_uchar,
+        }
+
+        #[repr(C)]
+        pub struct SRP_CTX {
+            SRP_cb_arg: *mut c_void,
+            TLS_ext_srp_username_callback: *mut c_void,
+            SRP_verify_param_callback: *mut c_void,
+            SRP_give_srp_client_pwd_callback: *mut c_void,
+            login: *mut c_void,
+            N: *mut c_void,
+            g: *mut c_void,
+            s: *mut c_void,
+            B: *mut c_void,
+            A: *mut c_void,
+            a: *mut c_void,
+            b: *mut c_void,
+            v: *mut c_void,
+            info: *mut c_void,
+            stringth: c_int,
+            srp_Mask: c_ulong,
+        }
+    }
+}
+
+pub enum COMP_METHOD {}
+
+cfg_if! {
+    if #[cfg(ossl110)] {
+        pub enum CRYPTO_EX_DATA {}
+    } else if #[cfg(libressl)] {
+        #[repr(C)]
+        pub struct CRYPTO_EX_DATA {
+            pub sk: *mut ::stack_st_void,
+        }
+    } else {
+        #[repr(C)]
+        pub struct CRYPTO_EX_DATA {
+            pub sk: *mut stack_st_void,
+            pub dummy: c_int,
+        }
+    }
+}
+
+pub enum OCSP_RESPONSE {}