external/boringssl: bump revision.

This change bumps the BoringSSL revision to the current tip-of-tree.

Change-Id: I91d5bf467e16e8d86cb19a4de873985f524e5faa

1 files changed, 1134 insertions, 0 deletions

diff --git a/src/ssl/internal.h b/src/ssl/internal.h
new file mode 100644
index 0000000..3bd749d
--- /dev/null
+++ b/src/ssl/internal.h
@@ -0,0 +1,1134 @@
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * ECC cipher suite support in OpenSSL originally developed by
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
+
+#ifndef OPENSSL_HEADER_SSL_INTERNAL_H
+#define OPENSSL_HEADER_SSL_INTERNAL_H
+
+#include <openssl/base.h>
+
+#include <openssl/aead.h>
+#include <openssl/pqueue.h>
+#include <openssl/ssl.h>
+#include <openssl/stack.h>
+
+#if defined(OPENSSL_WINDOWS)
+/* Windows defines struct timeval in winsock2.h. */
+#pragma warning(push, 3)
+#include <winsock2.h>
+#pragma warning(pop)
+#else
+#include <sys/types.h>
+#endif
+
+
+/* Cipher suites. */
+
+/* Bits for |algorithm_mkey| (key exchange algorithm). */
+#define SSL_kRSA 0x00000001L
+#define SSL_kDHE 0x00000002L
+#define SSL_kECDHE 0x00000004L
+/* SSL_kPSK is only set for plain PSK, not ECDHE_PSK. */
+#define SSL_kPSK 0x00000008L
+
+/* Bits for |algorithm_auth| (server authentication). */
+#define SSL_aRSA 0x00000001L
+#define SSL_aECDSA 0x00000002L
+/* SSL_aPSK is set for both PSK and ECDHE_PSK. */
+#define SSL_aPSK 0x00000004L
+
+/* Bits for |algorithm_enc| (symmetric encryption). */
+#define SSL_3DES 0x00000001L
+#define SSL_RC4 0x00000002L
+#define SSL_AES128 0x00000004L
+#define SSL_AES256 0x00000008L
+#define SSL_AES128GCM 0x00000010L
+#define SSL_AES256GCM 0x00000020L
+#define SSL_CHACHA20POLY1305 0x00000040L
+
+#define SSL_AES (SSL_AES128 | SSL_AES256 | SSL_AES128GCM | SSL_AES256GCM)
+
+/* Bits for |algorithm_mac| (symmetric authentication). */
+#define SSL_MD5 0x00000001L
+#define SSL_SHA1 0x00000002L
+#define SSL_SHA256 0x00000004L
+#define SSL_SHA384 0x00000008L
+/* SSL_AEAD is set for all AEADs. */
+#define SSL_AEAD 0x00000010L
+
+/* Bits for |algorithm_ssl| (protocol version). These denote the first protocol
+ * version which introduced the cipher.
+ *
+ * TODO(davidben): These are extremely confusing, both in code and in
+ * cipher rules. Try to remove them. */
+#define SSL_SSLV3 0x00000002L
+#define SSL_TLSV1 SSL_SSLV3
+#define SSL_TLSV1_2 0x00000004L
+
+/* Bits for |algorithm2| (handshake digests and other extra flags). */
+
+#define SSL_HANDSHAKE_MAC_MD5 0x10
+#define SSL_HANDSHAKE_MAC_SHA 0x20
+#define SSL_HANDSHAKE_MAC_SHA256 0x40
+#define SSL_HANDSHAKE_MAC_SHA384 0x80
+#define SSL_HANDSHAKE_MAC_DEFAULT \
+  (SSL_HANDSHAKE_MAC_MD5 | SSL_HANDSHAKE_MAC_SHA)
+
+/* SSL_MAX_DIGEST is the number of digest types which exist. When adding a new
+ * one, update the table in ssl_cipher.c. */
+#define SSL_MAX_DIGEST 4
+
+#define TLS1_PRF_DGST_MASK (0xff << TLS1_PRF_DGST_SHIFT)
+
+#define TLS1_PRF_DGST_SHIFT 10
+#define TLS1_PRF_MD5 (SSL_HANDSHAKE_MAC_MD5 << TLS1_PRF_DGST_SHIFT)
+#define TLS1_PRF_SHA1 (SSL_HANDSHAKE_MAC_SHA << TLS1_PRF_DGST_SHIFT)
+#define TLS1_PRF_SHA256 (SSL_HANDSHAKE_MAC_SHA256 << TLS1_PRF_DGST_SHIFT)
+#define TLS1_PRF_SHA384 (SSL_HANDSHAKE_MAC_SHA384 << TLS1_PRF_DGST_SHIFT)
+#define TLS1_PRF (TLS1_PRF_MD5 | TLS1_PRF_SHA1)
+
+/* SSL_CIPHER_ALGORITHM2_AEAD is a flag in SSL_CIPHER.algorithm2 which
+ * indicates that the cipher is implemented via an EVP_AEAD. */
+#define SSL_CIPHER_ALGORITHM2_AEAD (1 << 23)
+
+/* SSL_CIPHER_ALGORITHM2_VARIABLE_NONCE_INCLUDED_IN_RECORD is a flag in
+ * SSL_CIPHER.algorithm2 which indicates that the variable part of the nonce is
+ * included as a prefix of the record. (AES-GCM, for example, does with with an
+ * 8-byte variable nonce.) */
+#define SSL_CIPHER_ALGORITHM2_VARIABLE_NONCE_INCLUDED_IN_RECORD (1<<22)
+
+/* Bits for |algo_strength|, cipher strength information. */
+#define SSL_MEDIUM 0x00000001L
+#define SSL_HIGH 0x00000002L
+#define SSL_FIPS 0x00000004L
+
+/* ssl_cipher_get_evp_aead sets |*out_aead| to point to the correct EVP_AEAD
+ * object for |cipher| protocol version |version|. It sets |*out_mac_secret_len|
+ * and |*out_fixed_iv_len| to the MAC key length and fixed IV length,
+ * respectively. The MAC key length is zero except for legacy block and stream
+ * ciphers. It returns 1 on success and 0 on error. */
+int ssl_cipher_get_evp_aead(const EVP_AEAD **out_aead,
+                            size_t *out_mac_secret_len,
+                            size_t *out_fixed_iv_len,
+                            const SSL_CIPHER *cipher, uint16_t version);
+
+/* ssl_get_handshake_digest looks up the |i|th handshake digest type and sets
+ * |*out_mask| to the |SSL_HANDSHAKE_MAC_*| mask and |*out_md| to the
+ * |EVP_MD|. It returns one on successs and zero if |i| >= |SSL_MAX_DIGEST|. */
+int ssl_get_handshake_digest(uint32_t *out_mask, const EVP_MD **out_md,
+                             size_t i);
+
+/* ssl_create_cipher_list evaluates |rule_str| according to the ciphers in
+ * |ssl_method|. It sets |*out_cipher_list| to a newly-allocated
+ * |ssl_cipher_preference_list_st| containing the result.
+ * |*out_cipher_list_by_id| is set to a list of selected ciphers sorted by
+ * id. It returns |(*out_cipher_list)->ciphers| on success and NULL on
+ * failure. */
+STACK_OF(SSL_CIPHER) *
+ssl_create_cipher_list(const SSL_PROTOCOL_METHOD *ssl_method,
+                       struct ssl_cipher_preference_list_st **out_cipher_list,
+                       STACK_OF(SSL_CIPHER) **out_cipher_list_by_id,
+                       const char *rule_str);
+
+/* SSL_PKEY_* denote certificate types. */
+#define SSL_PKEY_RSA_ENC 0
+#define SSL_PKEY_RSA_SIGN 1
+#define SSL_PKEY_ECC 2
+#define SSL_PKEY_NUM 3
+
+/* ssl_cipher_get_cert_index returns the |SSL_PKEY_*| value corresponding to the
+ * certificate type of |cipher| or -1 if there is none. */
+int ssl_cipher_get_cert_index(const SSL_CIPHER *cipher);
+
+/* ssl_cipher_has_server_public_key returns 1 if |cipher| involves a server
+ * public key in the key exchange, sent in a server Certificate message.
+ * Otherwise it returns 0. */
+int ssl_cipher_has_server_public_key(const SSL_CIPHER *cipher);
+
+/* ssl_cipher_requires_server_key_exchange returns 1 if |cipher| requires a
+ * ServerKeyExchange message. Otherwise it returns 0.
+ *
+ * Unlike ssl_cipher_has_server_public_key, some ciphers take optional
+ * ServerKeyExchanges. PSK and RSA_PSK only use the ServerKeyExchange to
+ * communicate a psk_identity_hint, so it is optional. */
+int ssl_cipher_requires_server_key_exchange(const SSL_CIPHER *cipher);
+
+
+/* Underdocumented functions.
+ *
+ * Functions below here haven't been touched up and may be underdocumented. */
+
+#define c2l(c, l)                                                            \
+  (l = ((unsigned long)(*((c)++))), l |= (((unsigned long)(*((c)++))) << 8), \
+   l |= (((unsigned long)(*((c)++))) << 16),                                 \
+   l |= (((unsigned long)(*((c)++))) << 24))
+
+/* NOTE - c is not incremented as per c2l */
+#define c2ln(c, l1, l2, n)                       \
+  {                                              \
+    c += n;                                      \
+    l1 = l2 = 0;                                 \
+    switch (n) {                                 \
+      case 8:                                    \
+        l2 = ((unsigned long)(*(--(c)))) << 24;  \
+      case 7:                                    \
+        l2 |= ((unsigned long)(*(--(c)))) << 16; \
+      case 6:                                    \
+        l2 |= ((unsigned long)(*(--(c)))) << 8;  \
+      case 5:                                    \
+        l2 |= ((unsigned long)(*(--(c))));       \
+      case 4:                                    \
+        l1 = ((unsigned long)(*(--(c)))) << 24;  \
+      case 3:                                    \
+        l1 |= ((unsigned long)(*(--(c)))) << 16; \
+      case 2:                                    \
+        l1 |= ((unsigned long)(*(--(c)))) << 8;  \
+      case 1:                                    \
+        l1 |= ((unsigned long)(*(--(c))));       \
+    }                                            \
+  }
+
+#define l2c(l, c)                            \
+  (*((c)++) = (uint8_t)(((l)) & 0xff),       \
+   *((c)++) = (uint8_t)(((l) >> 8) & 0xff),  \
+   *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 24) & 0xff))
+
+#define n2l(c, l)                          \
+  (l = ((unsigned long)(*((c)++))) << 24,  \
+   l |= ((unsigned long)(*((c)++))) << 16, \
+   l |= ((unsigned long)(*((c)++))) << 8, l |= ((unsigned long)(*((c)++))))
+
+#define l2n(l, c)                            \
+  (*((c)++) = (uint8_t)(((l) >> 24) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 8) & 0xff),  \
+   *((c)++) = (uint8_t)(((l)) & 0xff))
+
+#define l2n8(l, c)                           \
+  (*((c)++) = (uint8_t)(((l) >> 56) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 48) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 40) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 32) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 24) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
+   *((c)++) = (uint8_t)(((l) >> 8) & 0xff),  \
+   *((c)++) = (uint8_t)(((l)) & 0xff))
+
+/* NOTE - c is not incremented as per l2c */
+#define l2cn(l1, l2, c, n)                               \
+  {                                                      \
+    c += n;                                              \
+    switch (n) {                                         \
+      case 8:                                            \
+        *(--(c)) = (uint8_t)(((l2) >> 24) & 0xff); \
+      case 7:                                            \
+        *(--(c)) = (uint8_t)(((l2) >> 16) & 0xff); \
+      case 6:                                            \
+        *(--(c)) = (uint8_t)(((l2) >> 8) & 0xff);  \
+      case 5:                                            \
+        *(--(c)) = (uint8_t)(((l2)) & 0xff);       \
+      case 4:                                            \
+        *(--(c)) = (uint8_t)(((l1) >> 24) & 0xff); \
+      case 3:                                            \
+        *(--(c)) = (uint8_t)(((l1) >> 16) & 0xff); \
+      case 2:                                            \
+        *(--(c)) = (uint8_t)(((l1) >> 8) & 0xff);  \
+      case 1:                                            \
+        *(--(c)) = (uint8_t)(((l1)) & 0xff);       \
+    }                                                    \
+  }
+
+#define n2s(c, s) \
+  ((s = (((unsigned int)(c[0])) << 8) | (((unsigned int)(c[1])))), c += 2)
+
+#define s2n(s, c)                              \
+  ((c[0] = (uint8_t)(((s) >> 8) & 0xff), \
+    c[1] = (uint8_t)(((s)) & 0xff)),     \
+   c += 2)
+
+#define n2l3(c, l)                                                         \
+  ((l = (((unsigned long)(c[0])) << 16) | (((unsigned long)(c[1])) << 8) | \
+        (((unsigned long)(c[2])))),                                        \
+   c += 3)
+
+#define l2n3(l, c)                              \
+  ((c[0] = (uint8_t)(((l) >> 16) & 0xff), \
+    c[1] = (uint8_t)(((l) >> 8) & 0xff),  \
+    c[2] = (uint8_t)(((l)) & 0xff)),      \
+   c += 3)
+
+/* LOCAL STUFF */
+
+#define TLSEXT_CHANNEL_ID_SIZE 128
+
+/* Check if an SSL structure is using DTLS */
+#define SSL_IS_DTLS(s) (s->method->is_dtls)
+/* See if we need explicit IV */
+#define SSL_USE_EXPLICIT_IV(s) \
+  (s->enc_method->enc_flags & SSL_ENC_FLAG_EXPLICIT_IV)
+/* See if we use signature algorithms extension and signature algorithm before
+ * signatures. */
+#define SSL_USE_SIGALGS(s) (s->enc_method->enc_flags & SSL_ENC_FLAG_SIGALGS)
+/* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2: may
+ * apply to others in future. */
+#define SSL_USE_TLS1_2_CIPHERS(s) \
+  (s->enc_method->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)
+/* Determine if a client can use TLS 1.2 ciphersuites: can't rely on method
+ * flags because it may not be set to correct version yet. */
+#define SSL_CLIENT_USE_TLS1_2_CIPHERS(s)                       \
+  ((SSL_IS_DTLS(s) && s->client_version <= DTLS1_2_VERSION) || \
+   (!SSL_IS_DTLS(s) && s->client_version >= TLS1_2_VERSION))
+
+/* SSL_kRSA <- RSA_ENC | (RSA_TMP & RSA_SIGN) |
+ * 	    <- (EXPORT & (RSA_ENC | RSA_TMP) & RSA_SIGN)
+ * SSL_kDH  <- DH_ENC & (RSA_ENC | RSA_SIGN | DSA_SIGN)
+ * SSL_kDHE <- RSA_ENC | RSA_SIGN | DSA_SIGN
+ * SSL_aRSA <- RSA_ENC | RSA_SIGN
+ * SSL_aDSS <- DSA_SIGN */
+
+#define PENDING_SESSION -10000
+
+/* From RFC4492, used in encoding the curve type in ECParameters */
+#define EXPLICIT_PRIME_CURVE_TYPE 1
+#define EXPLICIT_CHAR2_CURVE_TYPE 2
+#define NAMED_CURVE_TYPE 3
+
+enum ssl_hash_message_t {
+  ssl_dont_hash_message,
+  ssl_hash_message,
+};
+
+typedef struct cert_pkey_st {
+  X509 *x509;
+  EVP_PKEY *privatekey;
+  /* Chain for this certificate */
+  STACK_OF(X509) *chain;
+} CERT_PKEY;
+
+typedef struct cert_st {
+  /* Current active set */
+  CERT_PKEY *key; /* ALWAYS points to an element of the pkeys array
+                   * Probably it would make more sense to store
+                   * an index, not a pointer. */
+
+  /* For clients the following masks are of *disabled* key and auth algorithms
+   * based on the current session.
+   *
+   * TODO(davidben): Remove these. They get checked twice: when sending the
+   * ClientHello and when processing the ServerHello. However, mask_ssl is a
+   * different value both times. mask_k and mask_a are not, but is a
+   * round-about way of checking the server's cipher was one of the advertised
+   * ones. (Currently it checks the masks and then the list of ciphers prior to
+   * applying the masks in ClientHello.) */
+  uint32_t mask_k;
+  uint32_t mask_a;
+  uint32_t mask_ssl;
+
+  DH *dh_tmp;
+  DH *(*dh_tmp_cb)(SSL *ssl, int is_export, int keysize);
+
+  /* ecdh_nid, if not |NID_undef|, is the NID of the curve to use for ephemeral
+   * ECDH keys. If unset, |ecdh_tmp_cb| is consulted. */
+  int ecdh_nid;
+  /* ecdh_tmp_cb is a callback for selecting the curve to use for ephemeral ECDH
+   * keys. If NULL, a curve is selected automatically. See
+   * |SSL_CTX_set_tmp_ecdh_callback|. */
+  EC_KEY *(*ecdh_tmp_cb)(SSL *ssl, int is_export, int keysize);
+  CERT_PKEY pkeys[SSL_PKEY_NUM];
+
+  /* Server-only: client_certificate_types is list of certificate types to
+   * include in the CertificateRequest message.
+   */
+  uint8_t *client_certificate_types;
+  size_t num_client_certificate_types;
+
+  /* signature algorithms peer reports: e.g. supported signature
+   * algorithms extension for server or as part of a certificate
+   * request for client. */
+  uint8_t *peer_sigalgs;
+  /* Size of above array */
+  size_t peer_sigalgslen;
+  /* suppported signature algorithms.
+   * When set on a client this is sent in the client hello as the
+   * supported signature algorithms extension. For servers
+   * it represents the signature algorithms we are willing to use. */
+  uint8_t *conf_sigalgs;
+  /* Size of above array */
+  size_t conf_sigalgslen;
+  /* Client authentication signature algorithms, if not set then
+   * uses conf_sigalgs. On servers these will be the signature
+   * algorithms sent to the client in a cerificate request for TLS 1.2.
+   * On a client this represents the signature algortithms we are
+   * willing to use for client authentication. */
+  uint8_t *client_sigalgs;
+  /* Size of above array */
+  size_t client_sigalgslen;
+  /* Signature algorithms shared by client and server: cached
+   * because these are used most often. */
+  TLS_SIGALGS *shared_sigalgs;
+  size_t shared_sigalgslen;
+
+  /* Certificate setup callback: if set is called whenever a
+   * certificate may be required (client or server). the callback
+   * can then examine any appropriate parameters and setup any
+   * certificates required. This allows advanced applications
+   * to select certificates on the fly: for example based on
+   * supported signature algorithms or curves. */
+  int (*cert_cb)(SSL *ssl, void *arg);
+  void *cert_cb_arg;
+
+  /* Optional X509_STORE for chain building or certificate validation
+   * If NULL the parent SSL_CTX store is used instead. */
+  X509_STORE *chain_store;
+  X509_STORE *verify_store;
+} CERT;
+
+typedef struct sess_cert_st {
+  STACK_OF(X509) *cert_chain; /* as received from peer (not for SSL2) */
+
+  /* The 'peer_...' members are used only by clients. */
+  int peer_cert_type;
+
+  CERT_PKEY *peer_key; /* points to an element of peer_pkeys (never NULL!) */
+  CERT_PKEY peer_pkeys[SSL_PKEY_NUM];
+  /* Obviously we don't have the private keys of these,
+   * so maybe we shouldn't even use the CERT_PKEY type here. */
+
+  DH *peer_dh_tmp;
+  EC_KEY *peer_ecdh_tmp;
+} SESS_CERT;
+
+/* Structure containing decoded values of signature algorithms extension */
+struct tls_sigalgs_st {
+  /* NID of hash algorithm */
+  int hash_nid;
+  /* NID of signature algorithm */
+  int sign_nid;
+  /* Combined hash and signature NID */
+  int signandhash_nid;
+  /* Raw values used in extension */
+  uint8_t rsign;
+  uint8_t rhash;
+};
+
+/* SSL_METHOD is a compatibility structure to support the legacy version-locked
+ * methods. */
+struct ssl_method_st {
+  /* version, if non-zero, is the only protocol version acceptable to an
+   * SSL_CTX initialized from this method. */
+  uint16_t version;
+  /* method is the underlying SSL_PROTOCOL_METHOD that initializes the
+   * SSL_CTX. */
+  const SSL_PROTOCOL_METHOD *method;
+};
+
+/* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
+struct ssl_protocol_method_st {
+  /* is_dtls is one if the protocol is DTLS and zero otherwise. */
+  char is_dtls;
+  int (*ssl_new)(SSL *s);
+  void (*ssl_free)(SSL *s);
+  int (*ssl_accept)(SSL *s);
+  int (*ssl_connect)(SSL *s);
+  int (*ssl_read)(SSL *s, void *buf, int len);
+  int (*ssl_peek)(SSL *s, void *buf, int len);
+  int (*ssl_write)(SSL *s, const void *buf, int len);
+  int (*ssl_shutdown)(SSL *s);
+  int (*ssl_renegotiate)(SSL *s);
+  int (*ssl_renegotiate_check)(SSL *s);
+  long (*ssl_get_message)(SSL *s, int header_state, int body_state,
+                          int msg_type, long max,
+                          enum ssl_hash_message_t hash_message, int *ok);
+  int (*ssl_read_bytes)(SSL *s, int type, uint8_t *buf, int len, int peek);
+  int (*ssl_write_bytes)(SSL *s, int type, const void *buf_, int len);
+  int (*ssl_dispatch_alert)(SSL *s);
+  long (*ssl_ctrl)(SSL *s, int cmd, long larg, void *parg);
+  long (*ssl_ctx_ctrl)(SSL_CTX *ctx, int cmd, long larg, void *parg);
+  int (*ssl_pending)(const SSL *s);
+  size_t (*num_ciphers)(void);
+  const SSL_CIPHER *(*get_cipher)(size_t i);
+  /* Handshake header length */
+  unsigned int hhlen;
+  /* Set the handshake header */
+  int (*set_handshake_header)(SSL *s, int type, unsigned long len);
+  /* Write out handshake message */
+  int (*do_write)(SSL *s);
+};
+
+/* This is for the SSLv3/TLSv1.0 differences in crypto/hash stuff It is a bit
+ * of a mess of functions, but hell, think of it as an opaque structure. */
+struct ssl3_enc_method {
+  int (*enc)(SSL *, int);
+  int (*prf)(SSL *, uint8_t *, size_t, const uint8_t *, size_t, const char *,
+             size_t, const uint8_t *, size_t, const uint8_t *, size_t);
+  int (*setup_key_block)(SSL *);
+  int (*generate_master_secret)(SSL *, uint8_t *, const uint8_t *, size_t);
+  int (*change_cipher_state)(SSL *, int);
+  int (*final_finish_mac)(SSL *, const char *, int, uint8_t *);
+  int (*cert_verify_mac)(SSL *, int, uint8_t *);
+  const char *client_finished_label;
+  int client_finished_label_len;
+  const char *server_finished_label;
+  int server_finished_label_len;
+  int (*alert_value)(int);
+  int (*export_keying_material)(SSL *, uint8_t *, size_t, const char *, size_t,
+                                const uint8_t *, size_t, int use_context);
+  /* Various flags indicating protocol version requirements */
+  unsigned int enc_flags;
+};
+
+#define SSL_HM_HEADER_LENGTH(s) s->method->hhlen
+#define ssl_handshake_start(s) \
+  (((uint8_t *)s->init_buf->data) + s->method->hhlen)
+#define ssl_set_handshake_header(s, htype, len) \
+  s->method->set_handshake_header(s, htype, len)
+#define ssl_do_write(s) s->method->do_write(s)
+
+/* Values for enc_flags */
+
+/* Uses explicit IV for CBC mode */
+#define SSL_ENC_FLAG_EXPLICIT_IV 0x1
+/* Uses signature algorithms extension */
+#define SSL_ENC_FLAG_SIGALGS 0x2
+/* Uses SHA256 default PRF */
+#define SSL_ENC_FLAG_SHA256_PRF 0x4
+/* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2:
+ * may apply to others in future. */
+#define SSL_ENC_FLAG_TLS1_2_CIPHERS 0x8
+
+/* ssl_aead_ctx_st contains information about an AEAD that is being used to
+ * encrypt an SSL connection. */
+struct ssl_aead_ctx_st {
+  EVP_AEAD_CTX ctx;
+  /* fixed_nonce contains any bytes of the nonce that are fixed for all
+   * records. */
+  uint8_t fixed_nonce[8];
+  uint8_t fixed_nonce_len, variable_nonce_len, tag_len;
+  /* variable_nonce_included_in_record is non-zero if the variable nonce
+   * for a record is included as a prefix before the ciphertext. */
+  char variable_nonce_included_in_record;
+  /* random_variable_nonce is non-zero if the variable nonce is
+   * randomly generated, rather than derived from the sequence
+   * number. */
+  char random_variable_nonce;
+  /* omit_length_in_ad is non-zero if the length should be omitted in the
+   * AEAD's ad parameter. */
+  char omit_length_in_ad;
+  /* omit_version_in_ad is non-zero if the version should be omitted
+   * in the AEAD's ad parameter. */
+  char omit_version_in_ad;
+};
+
+/* lengths of messages */
+#define DTLS1_COOKIE_LENGTH 256
+
+#define DTLS1_RT_HEADER_LENGTH 13
+
+#define DTLS1_HM_HEADER_LENGTH 12
+
+#define DTLS1_CCS_HEADER_LENGTH 1
+
+#define DTLS1_AL_HEADER_LENGTH 2
+
+typedef struct dtls1_bitmap_st {
+  /* map is a bit mask of the last 64 sequence numbers. Bit
+   * |1<<i| corresponds to |max_seq_num - i|. */
+  uint64_t map;
+  /* max_seq_num is the largest sequence number seen so far. It
+   * is a 64-bit value in big-endian encoding. */
+  uint8_t max_seq_num[8];
+} DTLS1_BITMAP;
+
+/* TODO(davidben): This structure is used for both incoming messages and
+ * outgoing messages. |is_ccs| and |epoch| are only used in the latter and
+ * should be moved elsewhere. */
+struct hm_header_st {
+  uint8_t type;
+  uint32_t msg_len;
+  uint16_t seq;
+  uint32_t frag_off;
+  uint32_t frag_len;
+  int is_ccs;
+  /* epoch, for buffered outgoing messages, is the epoch the message was
+   * originally sent in. */
+  uint16_t epoch;
+};
+
+/* TODO(davidben): This structure is used for both incoming messages and
+ * outgoing messages. |fragment| and |reassembly| are only used in the former
+ * and should be moved elsewhere. */
+typedef struct hm_fragment_st {
+  struct hm_header_st msg_header;
+  uint8_t *fragment;
+  uint8_t *reassembly;
+} hm_fragment;
+
+typedef struct dtls1_state_st {
+  /* send_cookie is true if we are resending the ClientHello
+   * with a cookie from a HelloVerifyRequest. */
+  unsigned int send_cookie;
+
+  uint8_t cookie[DTLS1_COOKIE_LENGTH];
+  size_t cookie_len;
+
+  /* The current data and handshake epoch.  This is initially undefined, and
+   * starts at zero once the initial handshake is completed. */
+  uint16_t r_epoch;
+  uint16_t w_epoch;
+
+  /* records being received in the current epoch */
+  DTLS1_BITMAP bitmap;
+
+  /* handshake message numbers */
+  uint16_t handshake_write_seq;
+  uint16_t next_handshake_write_seq;
+
+  uint16_t handshake_read_seq;
+
+  /* save last sequence number for retransmissions */
+  uint8_t last_write_sequence[8];
+
+  /* buffered_messages is a priority queue of incoming handshake messages that
+   * have yet to be processed.
+   *
+   * TODO(davidben): This data structure may as well be a ring buffer of fixed
+   * size. */
+  pqueue buffered_messages;
+
+  /* send_messages is a priority queue of outgoing handshake messages sent in
+   * the most recent handshake flight.
+   *
+   * TODO(davidben): This data structure may as well be a STACK_OF(T). */
+  pqueue sent_messages;
+
+  unsigned int mtu; /* max DTLS packet size */
+
+  struct hm_header_st w_msg_hdr;
+
+  /* num_timeouts is the number of times the retransmit timer has fired since
+   * the last time it was reset. */
+  unsigned int num_timeouts;
+
+  /* Indicates when the last handshake msg or heartbeat sent will
+   * timeout. */
+  struct timeval next_timeout;
+
+  /* Timeout duration */
+  unsigned short timeout_duration;
+
+  unsigned int change_cipher_spec_ok;
+} DTLS1_STATE;
+
+extern const SSL_CIPHER ssl3_ciphers[];
+
+extern const SSL3_ENC_METHOD TLSv1_enc_data;
+extern const SSL3_ENC_METHOD TLSv1_1_enc_data;
+extern const SSL3_ENC_METHOD TLSv1_2_enc_data;
+extern const SSL3_ENC_METHOD SSLv3_enc_data;
+
+void ssl_clear_cipher_ctx(SSL *s);
+int ssl_clear_bad_session(SSL *s);
+CERT *ssl_cert_new(void);
+CERT *ssl_cert_dup(CERT *cert);
+void ssl_cert_clear_certs(CERT *c);
+void ssl_cert_free(CERT *c);
+SESS_CERT *ssl_sess_cert_new(void);
+void ssl_sess_cert_free(SESS_CERT *sc);
+int ssl_set_peer_cert_type(SESS_CERT *c, int type);
+int ssl_get_prev_session(SSL *s, const struct ssl_early_callback_ctx *ctx);
+int ssl_cipher_id_cmp(const void *in_a, const void *in_b);
+int ssl_cipher_ptr_id_cmp(const SSL_CIPHER **ap, const SSL_CIPHER **bp);
+STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s, const CBS *cbs);
+int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, uint8_t *p);
+struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_dup(
+    struct ssl_cipher_preference_list_st *cipher_list);
+void ssl_cipher_preference_list_free(
+    struct ssl_cipher_preference_list_st *cipher_list);
+struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_from_ciphers(
+    STACK_OF(SSL_CIPHER) *ciphers);
+struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *s);
+
+int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain);
+int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain);
+int ssl_cert_add0_chain_cert(CERT *c, X509 *x);
+int ssl_cert_add1_chain_cert(CERT *c, X509 *x);
+int ssl_cert_select_current(CERT *c, X509 *x);
+void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg);
+
+int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk);
+int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l);
+int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags);
+int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref);
+CERT_PKEY *ssl_get_server_send_pkey(const SSL *s);
+EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *c);
+int ssl_cert_type(EVP_PKEY *pkey);
+
+/* ssl_get_compatible_server_ciphers determines the key exchange and
+ * authentication cipher suite masks compatible with the server configuration
+ * and current ClientHello parameters of |s|. It sets |*out_mask_k| to the key
+ * exchange mask and |*out_mask_a| to the authentication mask. */
+void ssl_get_compatible_server_ciphers(SSL *s, uint32_t *out_mask_k,
+                                       uint32_t *out_mask_a);
+
+STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s);
+int ssl_verify_alarm_type(long type);
+int ssl_fill_hello_random(SSL *s, int server, uint8_t *field, size_t len);
+
+const SSL_CIPHER *ssl3_get_cipher_by_value(uint16_t value);
+uint16_t ssl3_get_cipher_value(const SSL_CIPHER *c);
+int ssl3_init_finished_mac(SSL *s);
+int ssl3_send_server_certificate(SSL *s);
+int ssl3_send_new_session_ticket(SSL *s);
+int ssl3_send_cert_status(SSL *s);
+int ssl3_get_finished(SSL *s, int state_a, int state_b);
+int ssl3_send_change_cipher_spec(SSL *s, int state_a, int state_b);
+int ssl3_prf(SSL *s, uint8_t *out, size_t out_len, const uint8_t *secret,
+             size_t secret_len, const char *label, size_t label_len,
+             const uint8_t *seed1, size_t seed1_len,
+             const uint8_t *seed2, size_t seed2_len);
+void ssl3_cleanup_key_block(SSL *s);
+int ssl3_do_write(SSL *s, int type);
+int ssl3_send_alert(SSL *s, int level, int desc);
+int ssl3_get_req_cert_type(SSL *s, uint8_t *p);
+long ssl3_get_message(SSL *s, int header_state, int body_state, int msg_type,
+                      long max, enum ssl_hash_message_t hash_message, int *ok);
+
+/* ssl3_hash_current_message incorporates the current handshake message into the
+ * handshake hash. It returns one on success and zero on allocation failure. */
+int ssl3_hash_current_message(SSL *s);
+
+/* ssl3_cert_verify_hash writes the CertificateVerify hash into the bytes
+ * pointed to by |out| and writes the number of bytes to |*out_len|. |out| must
+ * have room for EVP_MAX_MD_SIZE bytes. For TLS 1.2 and up, |*out_md| is used
+ * for the hash function, otherwise the hash function depends on the type of
+ * |pkey| and is written to |*out_md|. It returns one on success and zero on
+ * failure. */
+int ssl3_cert_verify_hash(SSL *s, uint8_t *out, size_t *out_len,
+                          const EVP_MD **out_md, EVP_PKEY *pkey);
+
+int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen);
+size_t ssl3_num_ciphers(void);
+const SSL_CIPHER *ssl3_get_cipher(size_t i);
+int ssl3_renegotiate(SSL *ssl);
+int ssl3_renegotiate_check(SSL *ssl);
+int ssl3_dispatch_alert(SSL *s);
+int ssl3_expect_change_cipher_spec(SSL *s);
+int ssl3_read_bytes(SSL *s, int type, uint8_t *buf, int len, int peek);
+int ssl3_write_bytes(SSL *s, int type, const void *buf, int len);
+int ssl3_final_finish_mac(SSL *s, const char *sender, int slen, uint8_t *p);
+int ssl3_cert_verify_mac(SSL *s, int md_nid, uint8_t *p);
+int ssl3_finish_mac(SSL *s, const uint8_t *buf, int len);
+void ssl3_free_digest_list(SSL *s);
+int ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk);
+const SSL_CIPHER *ssl3_choose_cipher(
+    SSL *ssl, STACK_OF(SSL_CIPHER) *clnt,
+    struct ssl_cipher_preference_list_st *srvr);
+int ssl3_setup_read_buffer(SSL *s);
+int ssl3_setup_write_buffer(SSL *s);
+int ssl3_release_read_buffer(SSL *s);
+int ssl3_release_write_buffer(SSL *s);
+
+enum should_free_handshake_buffer_t {
+  free_handshake_buffer,
+  dont_free_handshake_buffer,
+};
+int ssl3_digest_cached_records(SSL *s, enum should_free_handshake_buffer_t);
+
+int ssl3_new(SSL *s);
+void ssl3_free(SSL *s);
+int ssl3_accept(SSL *s);
+int ssl3_connect(SSL *s);
+int ssl3_read(SSL *s, void *buf, int len);
+int ssl3_peek(SSL *s, void *buf, int len);
+int ssl3_write(SSL *s, const void *buf, int len);
+int ssl3_shutdown(SSL *s);
+long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg);
+long ssl3_ctx_ctrl(SSL_CTX *s, int cmd, long larg, void *parg);
+int ssl3_pending(const SSL *s);
+
+/* ssl3_record_sequence_update increments the sequence number in |seq|. It
+ * returns one on success and zero on wraparound. */
+int ssl3_record_sequence_update(uint8_t *seq, size_t seq_len);
+
+int ssl3_do_change_cipher_spec(SSL *ssl);
+
+int ssl3_set_handshake_header(SSL *s, int htype, unsigned long len);
+int ssl3_handshake_write(SSL *s);
+
+int dtls1_do_write(SSL *s, int type);
+int ssl3_read_n(SSL *s, int n, int extend);
+int dtls1_read_bytes(SSL *s, int type, uint8_t *buf, int len, int peek);
+int ssl3_write_pending(SSL *s, int type, const uint8_t *buf, unsigned int len);
+void dtls1_set_message_header(SSL *s, uint8_t mt, unsigned long len,
+                              unsigned short seq_num, unsigned long frag_off,
+                              unsigned long frag_len);
+
+int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf, int len);
+int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
+
+int dtls1_send_change_cipher_spec(SSL *s, int a, int b);
+int dtls1_send_finished(SSL *s, int a, int b, const char *sender, int slen);
+int dtls1_read_failed(SSL *s, int code);
+int dtls1_buffer_message(SSL *s, int ccs);
+int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
+int dtls1_retransmit_buffered_messages(SSL *s);
+void dtls1_clear_record_buffer(SSL *s);
+void dtls1_get_message_header(uint8_t *data, struct hm_header_st *msg_hdr);
+void dtls1_reset_seq_numbers(SSL *s, int rw);
+int dtls1_check_timeout_num(SSL *s);
+int dtls1_set_handshake_header(SSL *s, int type, unsigned long len);
+int dtls1_handshake_write(SSL *s);
+
+const SSL_CIPHER *dtls1_get_cipher(size_t i);
+void dtls1_start_timer(SSL *s);
+void dtls1_stop_timer(SSL *s);
+int dtls1_is_timer_expired(SSL *s);
+void dtls1_double_timeout(SSL *s);
+unsigned int dtls1_min_mtu(void);
+void dtls1_hm_fragment_free(hm_fragment *frag);
+
+/* some client-only functions */
+int ssl3_send_client_hello(SSL *s);
+int ssl3_get_server_hello(SSL *s);
+int ssl3_get_certificate_request(SSL *s);
+int ssl3_get_new_session_ticket(SSL *s);
+int ssl3_get_cert_status(SSL *s);
+int ssl3_get_server_done(SSL *s);
+int ssl3_send_cert_verify(SSL *s);
+int ssl3_send_client_certificate(SSL *s);
+int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
+int ssl3_send_client_key_exchange(SSL *s);
+int ssl3_get_server_key_exchange(SSL *s);
+int ssl3_get_server_certificate(SSL *s);
+int ssl3_check_cert_and_algorithm(SSL *s);
+int ssl3_send_next_proto(SSL *s);
+int ssl3_send_channel_id(SSL *s);
+
+int dtls1_client_hello(SSL *s);
+
+/* some server-only functions */
+int ssl3_get_initial_bytes(SSL *s);
+int ssl3_get_v2_client_hello(SSL *s);
+int ssl3_get_client_hello(SSL *s);
+int ssl3_send_server_hello(SSL *s);
+int ssl3_send_hello_request(SSL *s);
+int ssl3_send_server_key_exchange(SSL *s);
+int ssl3_send_certificate_request(SSL *s);
+int ssl3_send_server_done(SSL *s);
+int ssl3_get_client_certificate(SSL *s);
+int ssl3_get_client_key_exchange(SSL *s);
+int ssl3_get_cert_verify(SSL *s);
+int ssl3_get_next_proto(SSL *s);
+int ssl3_get_channel_id(SSL *s);
+
+int dtls1_new(SSL *s);
+int dtls1_accept(SSL *s);
+int dtls1_connect(SSL *s);
+void dtls1_free(SSL *s);
+int dtls1_shutdown(SSL *s);
+
+long dtls1_get_message(SSL *s, int st1, int stn, int mt, long max,
+                       enum ssl_hash_message_t hash_message, int *ok);
+int dtls1_get_record(SSL *s);
+int dtls1_dispatch_alert(SSL *s);
+
+int ssl_init_wbio_buffer(SSL *s, int push);
+void ssl_free_wbio_buffer(SSL *s);
+
+/* tls1_prf computes the TLS PRF function for |s| as described in RFC 5246,
+ * section 5 and RFC 2246 section 5. It writes |out_len| bytes to |out|, using
+ * |secret| as the secret and |label| as the label. |seed1| and |seed2| are
+ * concatenated to form the seed parameter. It returns one on success and zero
+ * on failure. */
+int tls1_prf(SSL *s, uint8_t *out, size_t out_len, const uint8_t *secret,
+             size_t secret_len, const char *label, size_t label_len,
+             const uint8_t *seed1, size_t seed1_len,
+             const uint8_t *seed2, size_t seed2_len);
+
+int tls1_change_cipher_state(SSL *s, int which);
+int tls1_setup_key_block(SSL *s);
+int tls1_enc(SSL *s, int snd);
+int tls1_handshake_digest(SSL *s, uint8_t *out, size_t out_len);
+int tls1_final_finish_mac(SSL *s, const char *str, int slen, uint8_t *p);
+int tls1_cert_verify_mac(SSL *s, int md_nid, uint8_t *p);
+int tls1_generate_master_secret(SSL *s, uint8_t *out, const uint8_t *premaster,
+                                size_t premaster_len);
+int tls1_export_keying_material(SSL *s, uint8_t *out, size_t out_len,
+                                const char *label, size_t label_len,
+                                const uint8_t *context, size_t context_len,
+                                int use_context);
+int tls1_alert_code(int code);
+int ssl3_alert_code(int code);
+int ssl_ok(SSL *s);
+
+int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s);
+
+char ssl_early_callback_init(struct ssl_early_callback_ctx *ctx);
+int tls1_ec_curve_id2nid(uint16_t curve_id);
+int tls1_ec_nid2curve_id(uint16_t *out_curve_id, int nid);
+
+/* tls1_check_curve parses ECParameters out of |cbs|, modifying it. It
+ * checks the curve is one of our preferences and writes the
+ * NamedCurve value to |*out_curve_id|. It returns one on success and
+ * zero on error. */
+int tls1_check_curve(SSL *s, CBS *cbs, uint16_t *out_curve_id);
+
+/* tls1_get_shared_curve returns the NID of the first preferred shared curve
+ * between client and server preferences. If none can be found, it returns
+ * NID_undef. */
+int tls1_get_shared_curve(SSL *s);
+
+/* tls1_set_curves converts the array of |ncurves| NIDs pointed to by |curves|
+ * into a newly allocated array of TLS curve IDs. On success, the function
+ * returns one and writes the array to |*out_curve_ids| and its size to
+ * |*out_curve_ids_len|. Otherwise, it returns zero. */
+int tls1_set_curves(uint16_t **out_curve_ids, size_t *out_curve_ids_len,
+                    const int *curves, size_t ncurves);
+
+/* tls1_check_ec_cert returns one if |x| is an ECC certificate with curve and
+ * point format compatible with the client's preferences. Otherwise it returns
+ * zero. */
+int tls1_check_ec_cert(SSL *s, X509 *x);
+
+/* tls1_check_ec_tmp_key returns one if the EC temporary key is compatible with
+ * client extensions and zero otherwise. */
+int tls1_check_ec_tmp_key(SSL *s);
+
+int tls1_shared_list(SSL *s, const uint8_t *l1, size_t l1len, const uint8_t *l2,
+                     size_t l2len, int nmatch);
+uint8_t *ssl_add_clienthello_tlsext(SSL *s, uint8_t *buf, uint8_t *limit,
+                                    size_t header_len);
+uint8_t *ssl_add_serverhello_tlsext(SSL *s, uint8_t *buf, uint8_t *limit);
+int ssl_parse_clienthello_tlsext(SSL *s, CBS *cbs);
+int ssl_parse_serverhello_tlsext(SSL *s, CBS *cbs);
+int ssl_prepare_clienthello_tlsext(SSL *s);
+int ssl_prepare_serverhello_tlsext(SSL *s);
+
+#define tlsext_tick_md EVP_sha256
+int tls1_process_ticket(SSL *s, const struct ssl_early_callback_ctx *ctx,
+                        SSL_SESSION **ret);
+
+int tls12_get_sigandhash(uint8_t *p, const EVP_PKEY *pk, const EVP_MD *md);
+int tls12_get_sigid(const EVP_PKEY *pk);
+const EVP_MD *tls12_get_hash(uint8_t hash_alg);
+
+int tls1_channel_id_hash(EVP_MD_CTX *ctx, SSL *s);
+int tls1_record_handshake_hashes_for_channel_id(SSL *s);
+
+int tls1_set_sigalgs_list(CERT *c, const char *str, int client);
+int tls1_set_sigalgs(CERT *c, const int *salg, size_t salglen, int client);
+
+/* ssl_ctx_log_rsa_client_key_exchange logs |premaster| to |ctx|, if logging is
+ * enabled. It returns one on success and zero on failure. The entry is
+ * identified by the first 8 bytes of |encrypted_premaster|. */
+int ssl_ctx_log_rsa_client_key_exchange(SSL_CTX *ctx,
+                                        const uint8_t *encrypted_premaster,
+                                        size_t encrypted_premaster_len,
+                                        const uint8_t *premaster,
+                                        size_t premaster_len);
+
+/* ssl_ctx_log_master_secret logs |master| to |ctx|, if logging is enabled. It
+ * returns one on success and zero on failure. The entry is identified by
+ * |client_random|. */
+int ssl_ctx_log_master_secret(SSL_CTX *ctx, const uint8_t *client_random,
+                              size_t client_random_len, const uint8_t *master,
+                              size_t master_len);
+
+/* ssl3_can_false_start returns one if |s| is allowed to False Start and zero
+ * otherwise. */
+int ssl3_can_false_start(const SSL *s);
+
+/* ssl3_get_enc_method returns the SSL3_ENC_METHOD corresponding to
+ * |version|. */
+const SSL3_ENC_METHOD *ssl3_get_enc_method(uint16_t version);
+
+/* ssl3_get_max_server_version returns the maximum SSL/TLS version number
+ * supported by |s| as a server, or zero if all versions are disabled. */
+uint16_t ssl3_get_max_server_version(const SSL *s);
+
+/* ssl3_get_mutual_version selects the protocol version on |s| for a client
+ * which advertises |client_version|. If no suitable version exists, it returns
+ * zero. */
+uint16_t ssl3_get_mutual_version(SSL *s, uint16_t client_version);
+
+/* ssl3_get_max_client_version returns the maximum protocol version configured
+ * for the client. It is guaranteed that the set of allowed versions at or below
+ * this maximum version is contiguous. If all versions are disabled, it returns
+ * zero. */
+uint16_t ssl3_get_max_client_version(SSL *s);
+
+/* ssl3_is_version_enabled returns one if |version| is an enabled protocol
+ * version for |s| and zero otherwise. */
+int ssl3_is_version_enabled(SSL *s, uint16_t version);
+
+/* ssl3_version_from_wire maps |wire_version| to a protocol version. For
+ * SSLv3/TLS, the version is returned as-is. For DTLS, the corresponding TLS
+ * version is used. Note that this mapping is not injective but preserves
+ * comparisons.
+ *
+ * TODO(davidben): To normalize some DTLS-specific code, move away from using
+ * the wire version except at API boundaries. */
+uint16_t ssl3_version_from_wire(SSL *s, uint16_t wire_version);
+
+int ssl_add_serverhello_renegotiate_ext(SSL *s, uint8_t *p, int *len,
+                                        int maxlen);
+int ssl_parse_serverhello_renegotiate_ext(SSL *s, CBS *cbs, int *out_alert);
+int ssl_add_clienthello_renegotiate_ext(SSL *s, uint8_t *p, int *len,
+                                        int maxlen);
+int ssl_parse_clienthello_renegotiate_ext(SSL *s, CBS *cbs, int *out_alert);
+uint32_t ssl_get_algorithm2(SSL *s);
+int tls1_process_sigalgs(SSL *s, const CBS *sigalgs);
+
+/* tls1_choose_signing_digest returns a digest for use with |pkey| based on the
+ * peer's preferences recorded for |s| and the digests supported by |pkey|. */
+const EVP_MD *tls1_choose_signing_digest(SSL *s, EVP_PKEY *pkey);
+
+size_t tls12_get_psigalgs(SSL *s, const uint8_t **psigs);
+int tls12_check_peer_sigalg(const EVP_MD **out_md, int *out_alert, SSL *s,
+                            CBS *cbs, EVP_PKEY *pkey);
+void ssl_set_client_disabled(SSL *s);
+
+int ssl_add_clienthello_use_srtp_ext(SSL *s, uint8_t *p, int *len, int maxlen);
+int ssl_parse_clienthello_use_srtp_ext(SSL *s, CBS *cbs, int *out_alert);
+int ssl_add_serverhello_use_srtp_ext(SSL *s, uint8_t *p, int *len, int maxlen);
+int ssl_parse_serverhello_use_srtp_ext(SSL *s, CBS *cbs, int *out_alert);
+
+#endif /* OPENSSL_HEADER_SSL_INTERNAL_H */