diff --git a/src/_cffi_src/build_commoncrypto.py b/src/_cffi_src/build_commoncrypto.py
index 373f6f7..09e020a 100644
--- a/src/_cffi_src/build_commoncrypto.py
+++ b/src/_cffi_src/build_commoncrypto.py
@@ -25,7 +25,6 @@
         "secpolicy",
         "sectransform",
         "sectrust",
-        "secure_transport",
     ],
     extra_link_args=[
         "-framework", "Security", "-framework", "CoreFoundation"
diff --git a/src/_cffi_src/commoncrypto/secure_transport.py b/src/_cffi_src/commoncrypto/secure_transport.py
deleted file mode 100644
index c59bb2f..0000000
--- a/src/_cffi_src/commoncrypto/secure_transport.py
+++ /dev/null
@@ -1,313 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-
-from __future__ import absolute_import, division, print_function
-
-INCLUDES = """
-#include <Security/SecureTransport.h>
-"""
-
-TYPES = """
-typedef ... *SSLContextRef;
-typedef const void *SSLConnectionRef;
-
-typedef enum {
-    kSSLSessionOptionBreakOnServerAuth,
-    kSSLSessionOptionBreakOnCertRequested,
-} SSLSessionOption;
-
-typedef enum {
-    kNeverAuthenticate,
-    kAlwaysAuthenticate,
-    kTryAuthenticate
-} SSLAuthenticate;
-
-typedef enum {
-    kSSLIdle,
-    kSSLHandshake,
-    kSSLConnected,
-    kSSLClosed,
-    kSSLAborted
-} SSLSessionState;
-
-typedef enum {
-    kSSLProtocolUnknown = 0,
-    kSSLProtocol3       = 2,
-    kTLSProtocol1       = 4,
-    /* DEPRECATED on iOS */
-    kSSLProtocol2       = 1,
-    kSSLProtocol3Only   = 3,
-    kTLSProtocol1Only   = 5,
-    kSSLProtocolAll     = 6,
-} SSLProtocol;
-
-typedef UInt32 SSLCipherSuite;
-enum {
-   SSL_NULL_WITH_NULL_NULL =               0x0000,
-   SSL_RSA_WITH_NULL_MD5 =                 0x0001,
-   SSL_RSA_WITH_NULL_SHA =                 0x0002,
-   SSL_RSA_EXPORT_WITH_RC4_40_MD5 =        0x0003,
-   SSL_RSA_WITH_RC4_128_MD5 =              0x0004,
-   SSL_RSA_WITH_RC4_128_SHA =              0x0005,
-   SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5 =    0x0006,
-   SSL_RSA_WITH_IDEA_CBC_SHA =             0x0007,
-   SSL_RSA_EXPORT_WITH_DES40_CBC_SHA =     0x0008,
-   SSL_RSA_WITH_DES_CBC_SHA =              0x0009,
-   SSL_RSA_WITH_3DES_EDE_CBC_SHA =         0x000A,
-   SSL_DH_DSS_EXPORT_WITH_DES40_CBC_SHA =  0x000B,
-   SSL_DH_DSS_WITH_DES_CBC_SHA =           0x000C,
-   SSL_DH_DSS_WITH_3DES_EDE_CBC_SHA =      0x000D,
-   SSL_DH_RSA_EXPORT_WITH_DES40_CBC_SHA =  0x000E,
-   SSL_DH_RSA_WITH_DES_CBC_SHA =           0x000F,
-   SSL_DH_RSA_WITH_3DES_EDE_CBC_SHA =      0x0010,
-   SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA = 0x0011,
-   SSL_DHE_DSS_WITH_DES_CBC_SHA =          0x0012,
-   SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA =     0x0013,
-   SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA = 0x0014,
-   SSL_DHE_RSA_WITH_DES_CBC_SHA =          0x0015,
-   SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA =     0x0016,
-   SSL_DH_anon_EXPORT_WITH_RC4_40_MD5 =    0x0017,
-   SSL_DH_anon_WITH_RC4_128_MD5 =          0x0018,
-   SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA = 0x0019,
-   SSL_DH_anon_WITH_DES_CBC_SHA =          0x001A,
-   SSL_DH_anon_WITH_3DES_EDE_CBC_SHA =     0x001B,
-   SSL_FORTEZZA_DMS_WITH_NULL_SHA =        0x001C,
-   SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA =0x001D,
-
-   /* TLS addenda using AES, per RFC 3268 */
-   TLS_RSA_WITH_AES_128_CBC_SHA      =     0x002F,
-   TLS_DH_DSS_WITH_AES_128_CBC_SHA   =     0x0030,
-   TLS_DH_RSA_WITH_AES_128_CBC_SHA   =     0x0031,
-   TLS_DHE_DSS_WITH_AES_128_CBC_SHA  =     0x0032,
-   TLS_DHE_RSA_WITH_AES_128_CBC_SHA  =     0x0033,
-   TLS_DH_anon_WITH_AES_128_CBC_SHA  =     0x0034,
-   TLS_RSA_WITH_AES_256_CBC_SHA      =     0x0035,
-   TLS_DH_DSS_WITH_AES_256_CBC_SHA   =     0x0036,
-   TLS_DH_RSA_WITH_AES_256_CBC_SHA   =     0x0037,
-   TLS_DHE_DSS_WITH_AES_256_CBC_SHA  =     0x0038,
-   TLS_DHE_RSA_WITH_AES_256_CBC_SHA  =     0x0039,
-   TLS_DH_anon_WITH_AES_256_CBC_SHA  =     0x003A,
-
-   /* ECDSA addenda, RFC 4492 */
-   TLS_ECDH_ECDSA_WITH_NULL_SHA           =    0xC001,
-   TLS_ECDH_ECDSA_WITH_RC4_128_SHA        =    0xC002,
-   TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA   =    0xC003,
-   TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA    =    0xC004,
-   TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA    =    0xC005,
-   TLS_ECDHE_ECDSA_WITH_NULL_SHA          =    0xC006,
-   TLS_ECDHE_ECDSA_WITH_RC4_128_SHA       =    0xC007,
-   TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA  =    0xC008,
-   TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   =    0xC009,
-   TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   =    0xC00A,
-   TLS_ECDH_RSA_WITH_NULL_SHA             =    0xC00B,
-   TLS_ECDH_RSA_WITH_RC4_128_SHA          =    0xC00C,
-   TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA     =    0xC00D,
-   TLS_ECDH_RSA_WITH_AES_128_CBC_SHA      =    0xC00E,
-   TLS_ECDH_RSA_WITH_AES_256_CBC_SHA      =    0xC00F,
-   TLS_ECDHE_RSA_WITH_NULL_SHA            =    0xC010,
-   TLS_ECDHE_RSA_WITH_RC4_128_SHA         =    0xC011,
-   TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA    =    0xC012,
-   TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA     =    0xC013,
-   TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA     =    0xC014,
-   TLS_ECDH_anon_WITH_NULL_SHA            =    0xC015,
-   TLS_ECDH_anon_WITH_RC4_128_SHA         =    0xC016,
-   TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA    =    0xC017,
-   TLS_ECDH_anon_WITH_AES_128_CBC_SHA     =    0xC018,
-   TLS_ECDH_anon_WITH_AES_256_CBC_SHA     =    0xC019,
-
-   /* TLS 1.2 addenda, RFC 5246 */
-   /* Initial state. */
-   TLS_NULL_WITH_NULL_NULL                   = 0x0000,
-
-   /* Server provided RSA certificate for key exchange. */
-   TLS_RSA_WITH_NULL_MD5                     = 0x0001,
-   TLS_RSA_WITH_NULL_SHA                     = 0x0002,
-   TLS_RSA_WITH_RC4_128_MD5                  = 0x0004,
-   TLS_RSA_WITH_RC4_128_SHA                  = 0x0005,
-   TLS_RSA_WITH_3DES_EDE_CBC_SHA             = 0x000A,
-   TLS_RSA_WITH_NULL_SHA256                  = 0x003B,
-   TLS_RSA_WITH_AES_128_CBC_SHA256           = 0x003C,
-   TLS_RSA_WITH_AES_256_CBC_SHA256           = 0x003D,
-
-   /* Server-authenticated (and optionally client-authenticated)
-      Diffie-Hellman. */
-   TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA          = 0x000D,
-   TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA          = 0x0010,
-   TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA         = 0x0013,
-   TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA         = 0x0016,
-   TLS_DH_DSS_WITH_AES_128_CBC_SHA256        = 0x003E,
-   TLS_DH_RSA_WITH_AES_128_CBC_SHA256        = 0x003F,
-   TLS_DHE_DSS_WITH_AES_128_CBC_SHA256       = 0x0040,
-   TLS_DHE_RSA_WITH_AES_128_CBC_SHA256       = 0x0067,
-   TLS_DH_DSS_WITH_AES_256_CBC_SHA256        = 0x0068,
-   TLS_DH_RSA_WITH_AES_256_CBC_SHA256        = 0x0069,
-   TLS_DHE_DSS_WITH_AES_256_CBC_SHA256       = 0x006A,
-   TLS_DHE_RSA_WITH_AES_256_CBC_SHA256       = 0x006B,
-
-   /* Completely anonymous Diffie-Hellman */
-   TLS_DH_anon_WITH_RC4_128_MD5              = 0x0018,
-   TLS_DH_anon_WITH_3DES_EDE_CBC_SHA         = 0x001B,
-   TLS_DH_anon_WITH_AES_128_CBC_SHA256       = 0x006C,
-   TLS_DH_anon_WITH_AES_256_CBC_SHA256       = 0x006D,
-
-   /* Addenda from rfc 5288 AES Galois Counter Mode (GCM) Cipher Suites
-      for TLS. */
-   TLS_RSA_WITH_AES_128_GCM_SHA256           = 0x009C,
-   TLS_RSA_WITH_AES_256_GCM_SHA384           = 0x009D,
-   TLS_DHE_RSA_WITH_AES_128_GCM_SHA256       = 0x009E,
-   TLS_DHE_RSA_WITH_AES_256_GCM_SHA384       = 0x009F,
-   TLS_DH_RSA_WITH_AES_128_GCM_SHA256        = 0x00A0,
-   TLS_DH_RSA_WITH_AES_256_GCM_SHA384        = 0x00A1,
-   TLS_DHE_DSS_WITH_AES_128_GCM_SHA256       = 0x00A2,
-   TLS_DHE_DSS_WITH_AES_256_GCM_SHA384       = 0x00A3,
-   TLS_DH_DSS_WITH_AES_128_GCM_SHA256        = 0x00A4,
-   TLS_DH_DSS_WITH_AES_256_GCM_SHA384        = 0x00A5,
-   TLS_DH_anon_WITH_AES_128_GCM_SHA256       = 0x00A6,
-   TLS_DH_anon_WITH_AES_256_GCM_SHA384       = 0x00A7,
-
-   /* Addenda from rfc 5289  Elliptic Curve Cipher Suites with
-      HMAC SHA-256/384. */
-   TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256   = 0xC023,
-   TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384   = 0xC024,
-   TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256    = 0xC025,
-   TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384    = 0xC026,
-   TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256     = 0xC027,
-   TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384     = 0xC028,
-   TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256      = 0xC029,
-   TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384      = 0xC02A,
-
-   /* Addenda from rfc 5289  Elliptic Curve Cipher Suites with
-      SHA-256/384 and AES Galois Counter Mode (GCM) */
-   TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   = 0xC02B,
-   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   = 0xC02C,
-   TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256    = 0xC02D,
-   TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384    = 0xC02E,
-   TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256     = 0xC02F,
-   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384     = 0xC030,
-   TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256      = 0xC031,
-   TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384      = 0xC032,
-
-   /* RFC 5746 - Secure Renegotiation */
-   TLS_EMPTY_RENEGOTIATION_INFO_SCSV         = 0x00FF,
-
-   /*
-   * Tags for SSL 2 cipher kinds that are not specified
-   * for SSL 3.
-   */
-   SSL_RSA_WITH_RC2_CBC_MD5 =              0xFF80,
-   SSL_RSA_WITH_IDEA_CBC_MD5 =             0xFF81,
-   SSL_RSA_WITH_DES_CBC_MD5 =              0xFF82,
-   SSL_RSA_WITH_3DES_EDE_CBC_MD5 =         0xFF83,
-   SSL_NO_SUCH_CIPHERSUITE =               0xFFFF
-};
-
-typedef enum {
-    kSSLClientCertNone,
-    kSSLClientCertRequested,
-    kSSLClientCertSent,
-    kSSLClientCertRejected
-} SSLClientCertificateState;
-
-enum {
-    errSSLProtocol              = -9800,
-    errSSLNegotiation           = -9801,
-    errSSLFatalAlert            = -9802,
-    errSSLWouldBlock            = -9803,
-    errSSLSessionNotFound       = -9804,
-    errSSLClosedGraceful        = -9805,
-    errSSLClosedAbort           = -9806,
-    errSSLXCertChainInvalid     = -9807,
-    errSSLBadCert               = -9808,
-    errSSLCrypto                = -9809,
-    errSSLInternal              = -9810,
-    errSSLModuleAttach          = -9811,
-    errSSLUnknownRootCert       = -9812,
-    errSSLNoRootCert            = -9813,
-    errSSLCertExpired           = -9814,
-    errSSLCertNotYetValid       = -9815,
-    errSSLClosedNoNotify        = -9816,
-    errSSLBufferOverflow        = -9817,
-    errSSLBadCipherSuite        = -9818,
-    errSSLPeerUnexpectedMsg     = -9819,
-    errSSLPeerBadRecordMac      = -9820,
-    errSSLPeerDecryptionFail    = -9821,
-    errSSLPeerRecordOverflow    = -9822,
-    errSSLPeerDecompressFail    = -9823,
-    errSSLPeerHandshakeFail     = -9824,
-    errSSLPeerBadCert           = -9825,
-    errSSLPeerUnsupportedCert   = -9826,
-    errSSLPeerCertRevoked       = -9827,
-    errSSLPeerCertExpired       = -9828,
-    errSSLPeerCertUnknown       = -9829,
-    errSSLIllegalParam          = -9830,
-    errSSLPeerUnknownCA         = -9831,
-    errSSLPeerAccessDenied      = -9832,
-    errSSLPeerDecodeError       = -9833,
-    errSSLPeerDecryptError      = -9834,
-    errSSLPeerExportRestriction = -9835,
-    errSSLPeerProtocolVersion   = -9836,
-    errSSLPeerInsufficientSecurity = -9837,
-    errSSLPeerInternalError     = -9838,
-    errSSLPeerUserCancelled     = -9839,
-    errSSLPeerNoRenegotiation   = -9840,
-    errSSLServerAuthCompleted   = -9841,
-    errSSLClientCertRequested   = -9842,
-    errSSLHostNameMismatch      = -9843,
-    errSSLConnectionRefused     = -9844,
-    errSSLDecryptionFail        = -9845,
-    errSSLBadRecordMac          = -9846,
-    errSSLRecordOverflow        = -9847,
-    errSSLBadConfiguration      = -9848,
-    errSSLLast                  = -9849     /* end of range, to be deleted */
-};
-
-typedef OSStatus (*SSLReadFunc)(SSLConnectionRef, void *, size_t *);
-typedef OSStatus (*SSLWriteFunc)(SSLConnectionRef, const void *, size_t *);
-"""
-
-FUNCTIONS = """
-OSStatus SSLSetConnection(SSLContextRef, SSLConnectionRef);
-OSStatus SSLGetConnection(SSLContextRef, SSLConnectionRef *);
-OSStatus SSLSetSessionOption(SSLContextRef, SSLSessionOption, Boolean);
-OSStatus SSLGetSessionOption(SSLContextRef, SSLSessionOption, Boolean *);
-OSStatus SSLSetIOFuncs(SSLContextRef, SSLReadFunc, SSLWriteFunc);
-OSStatus SSLSetClientSideAuthenticate(SSLContextRef, SSLAuthenticate);
-
-OSStatus SSLHandshake(SSLContextRef);
-OSStatus SSLGetSessionState(SSLContextRef, SSLSessionState *);
-OSStatus SSLGetNegotiatedProtocolVersion(SSLContextRef, SSLProtocol *);
-OSStatus SSLSetPeerID(SSLContextRef, const void *, size_t);
-OSStatus SSLGetPeerID(SSLContextRef, const void **, size_t *);
-OSStatus SSLGetBufferedReadSize(SSLContextRef, size_t *);
-OSStatus SSLRead(SSLContextRef, void *, size_t, size_t *);
-OSStatus SSLWrite(SSLContextRef, const void *, size_t, size_t *);
-OSStatus SSLClose(SSLContextRef);
-
-OSStatus SSLGetNumberSupportedCiphers(SSLContextRef, size_t *);
-OSStatus SSLGetSupportedCiphers(SSLContextRef, SSLCipherSuite *, size_t *);
-OSStatus SSLSetEnabledCiphers(SSLContextRef, const SSLCipherSuite *, size_t);
-OSStatus SSLGetNumberEnabledCiphers(SSLContextRef, size_t *);
-OSStatus SSLGetEnabledCiphers(SSLContextRef, SSLCipherSuite *, size_t *);
-OSStatus SSLGetNegotiatedCipher(SSLContextRef, SSLCipherSuite *);
-OSStatus SSLSetDiffieHellmanParams(SSLContextRef, const void *, size_t);
-OSStatus SSLGetDiffieHellmanParams(SSLContextRef, const void **, size_t *);
-
-OSStatus SSLSetCertificateAuthorities(SSLContextRef, CFTypeRef, Boolean);
-OSStatus SSLCopyCertificateAuthorities(SSLContextRef, CFArrayRef *);
-OSStatus SSLCopyDistinguishedNames(SSLContextRef, CFArrayRef *);
-OSStatus SSLSetCertificate(SSLContextRef, CFArrayRef);
-OSStatus SSLGetClientCertificateState(SSLContextRef,
-                                      SSLClientCertificateState *);
-OSStatus SSLCopyPeerTrust(SSLContextRef, SecTrustRef *trust);
-
-OSStatus SSLSetPeerDomainName(SSLContextRef, const char *, size_t);
-OSStatus SSLGetPeerDomainNameLength(SSLContextRef, size_t *);
-OSStatus SSLGetPeerDomainName(SSLContextRef, char *, size_t *);
-"""
-
-MACROS = """
-"""
-
-CUSTOMIZATIONS = """
-"""