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openssl/ssl/ssl_locl.h
Matt Caswell f5c7f5dfba Fix DTLS buffered message DoS attack 
DTLS can handle out of order record delivery. Additionally since
handshake messages can be bigger than will fit into a single packet, the
messages can be fragmented across multiple records (as with normal TLS).
That means that the messages can arrive mixed up, and we have to
reassemble them. We keep a queue of buffered messages that are "from the
future", i.e. messages we're not ready to deal with yet but have arrived
early. The messages held there may not be full yet - they could be one
or more fragments that are still in the process of being reassembled.

The code assumes that we will eventually complete the reassembly and
when that occurs the complete message is removed from the queue at the
point that we need to use it.

However, DTLS is also tolerant of packet loss. To get around that DTLS
messages can be retransmitted. If we receive a full (non-fragmented)
message from the peer after previously having received a fragment of
that message, then we ignore the message in the queue and just use the
non-fragmented version. At that point the queued message will never get
removed.

Additionally the peer could send "future" messages that we never get to
in order to complete the handshake. Each message has a sequence number
(starting from 0). We will accept a message fragment for the current
message sequence number, or for any sequence up to 10 into the future.
However if the Finished message has a sequence number of 2, anything
greater than that in the queue is just left there.

So, in those two ways we can end up with "orphaned" data in the queue
that will never get removed - except when the connection is closed. At
that point all the queues are flushed.

An attacker could seek to exploit this by filling up the queues with
lots of large messages that are never going to be used in order to
attempt a DoS by memory exhaustion.

I will assume that we are only concerned with servers here. It does not
seem reasonable to be concerned about a memory exhaustion attack on a
client. They are unlikely to process enough connections for this to be
an issue.

A "long" handshake with many messages might be 5 messages long (in the
incoming direction), e.g. ClientHello, Certificate, ClientKeyExchange,
CertificateVerify, Finished. So this would be message sequence numbers 0
to 4. Additionally we can buffer up to 10 messages in the future.
Therefore the maximum number of messages that an attacker could send
that could get orphaned would typically be 15.

The maximum size that a DTLS message is allowed to be is defined by
max_cert_list, which by default is 100k. Therefore the maximum amount of
"orphaned" memory per connection is 1500k.

Message sequence numbers get reset after the Finished message, so
renegotiation will not extend the maximum number of messages that can be
orphaned per connection.

As noted above, the queues do get cleared when the connection is closed.
Therefore in order to mount an effective attack, an attacker would have
to open many simultaneous connections.

Issue reported by Quan Luo.

CVE-2016-2179

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-08-22 10:53:55 +01:00

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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* ====================================================================
* 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 HEADER_SSL_LOCL_H
# define HEADER_SSL_LOCL_H
# include <stdlib.h>
# include <time.h>
# include <string.h>
# include <errno.h>
# include "e_os.h"
# if defined(__unix) || defined(__unix__)
# include <sys/time.h> /* struct timeval for DTLS */
# endif
# include <openssl/buffer.h>
# include <openssl/comp.h>
# include <openssl/bio.h>
# include <openssl/stack.h>
# include <openssl/rsa.h>
# include <openssl/dsa.h>
# include <openssl/err.h>
# include <openssl/ssl.h>
# include <openssl/async.h>
# include <openssl/symhacks.h>
# include <openssl/ct.h>
# include "record/record.h"
# include "statem/statem.h"
# include "packet_locl.h"
# include "internal/dane.h"
# ifdef OPENSSL_BUILD_SHLIBSSL
# undef OPENSSL_EXTERN
# define OPENSSL_EXTERN OPENSSL_EXPORT
# endif
# undef PKCS1_CHECK
# 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)++)=(unsigned char)(((l) )&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((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 n2l8(c,l) (l =((uint64_t)(*((c)++)))<<56, \
l|=((uint64_t)(*((c)++)))<<48, \
l|=((uint64_t)(*((c)++)))<<40, \
l|=((uint64_t)(*((c)++)))<<32, \
l|=((uint64_t)(*((c)++)))<<24, \
l|=((uint64_t)(*((c)++)))<<16, \
l|=((uint64_t)(*((c)++)))<< 8, \
l|=((uint64_t)(*((c)++))))
# define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff))
# define l2n6(l,c) (*((c)++)=(unsigned char)(((l)>>40)&0xff), \
*((c)++)=(unsigned char)(((l)>>32)&0xff), \
*((c)++)=(unsigned char)(((l)>>24)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff))
# define l2n8(l,c) (*((c)++)=(unsigned char)(((l)>>56)&0xff), \
*((c)++)=(unsigned char)(((l)>>48)&0xff), \
*((c)++)=(unsigned char)(((l)>>40)&0xff), \
*((c)++)=(unsigned char)(((l)>>32)&0xff), \
*((c)++)=(unsigned char)(((l)>>24)&0xff), \
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff))
/* NOTE - c is not incremented as per l2c */
# define l2cn(l1,l2,c,n) { \
c+=n; \
switch (n) { \
case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
} \
}
# define n2s(c,s) ((s=(((unsigned int)((c)[0]))<< 8)| \
(((unsigned int)((c)[1])) )),(c)+=2)
# define s2n(s,c) (((c)[0]=(unsigned char)(((s)>> 8)&0xff), \
(c)[1]=(unsigned char)(((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]=(unsigned char)(((l)>>16)&0xff), \
(c)[1]=(unsigned char)(((l)>> 8)&0xff), \
(c)[2]=(unsigned char)(((l) )&0xff)),(c)+=3)
/*
* DTLS version numbers are strange because they're inverted. Except for
* DTLS1_BAD_VER, which should be considered "lower" than the rest.
*/
# define dtls_ver_ordinal(v1) (((v1) == DTLS1_BAD_VER) ? 0xff00 : (v1))
# define DTLS_VERSION_GT(v1, v2) (dtls_ver_ordinal(v1) < dtls_ver_ordinal(v2))
# define DTLS_VERSION_GE(v1, v2) (dtls_ver_ordinal(v1) <= dtls_ver_ordinal(v2))
# define DTLS_VERSION_LT(v1, v2) (dtls_ver_ordinal(v1) > dtls_ver_ordinal(v2))
# define DTLS_VERSION_LE(v1, v2) (dtls_ver_ordinal(v1) >= dtls_ver_ordinal(v2))
/* LOCAL STUFF */
# define SSL_DECRYPT 0
# define SSL_ENCRYPT 1
# define TWO_BYTE_BIT 0x80
# define SEC_ESC_BIT 0x40
# define TWO_BYTE_MASK 0x7fff
# define THREE_BYTE_MASK 0x3fff
# define INC32(a) ((a)=((a)+1)&0xffffffffL)
# define DEC32(a) ((a)=((a)-1)&0xffffffffL)
# define MAX_MAC_SIZE 20 /* up from 16 for SSLv3 */
/*
* Define the Bitmasks for SSL_CIPHER.algorithms.
* This bits are used packed as dense as possible. If new methods/ciphers
* etc will be added, the bits a likely to change, so this information
* is for internal library use only, even though SSL_CIPHER.algorithms
* can be publicly accessed.
* Use the according functions for cipher management instead.
*
* The bit mask handling in the selection and sorting scheme in
* ssl_create_cipher_list() has only limited capabilities, reflecting
* that the different entities within are mutually exclusive:
* ONLY ONE BIT PER MASK CAN BE SET AT A TIME.
*/
/* Bits for algorithm_mkey (key exchange algorithm) */
/* RSA key exchange */
# define SSL_kRSA 0x00000001U
/* tmp DH key no DH cert */
# define SSL_kDHE 0x00000002U
/* synonym */
# define SSL_kEDH SSL_kDHE
/* ephemeral ECDH */
# define SSL_kECDHE 0x00000004U
/* synonym */
# define SSL_kEECDH SSL_kECDHE
/* PSK */
# define SSL_kPSK 0x00000008U
/* GOST key exchange */
# define SSL_kGOST 0x00000010U
/* SRP */
# define SSL_kSRP 0x00000020U
# define SSL_kRSAPSK 0x00000040U
# define SSL_kECDHEPSK 0x00000080U
# define SSL_kDHEPSK 0x00000100U
/* all PSK */
# define SSL_PSK (SSL_kPSK | SSL_kRSAPSK | SSL_kECDHEPSK | SSL_kDHEPSK)
/* Bits for algorithm_auth (server authentication) */
/* RSA auth */
# define SSL_aRSA 0x00000001U
/* DSS auth */
# define SSL_aDSS 0x00000002U
/* no auth (i.e. use ADH or AECDH) */
# define SSL_aNULL 0x00000004U
/* ECDSA auth*/
# define SSL_aECDSA 0x00000008U
/* PSK auth */
# define SSL_aPSK 0x00000010U
/* GOST R 34.10-2001 signature auth */
# define SSL_aGOST01 0x00000020U
/* SRP auth */
# define SSL_aSRP 0x00000040U
/* GOST R 34.10-2012 signature auth */
# define SSL_aGOST12 0x00000080U
/* Bits for algorithm_enc (symmetric encryption) */
# define SSL_DES 0x00000001U
# define SSL_3DES 0x00000002U
# define SSL_RC4 0x00000004U
# define SSL_RC2 0x00000008U
# define SSL_IDEA 0x00000010U
# define SSL_eNULL 0x00000020U
# define SSL_AES128 0x00000040U
# define SSL_AES256 0x00000080U
# define SSL_CAMELLIA128 0x00000100U
# define SSL_CAMELLIA256 0x00000200U
# define SSL_eGOST2814789CNT 0x00000400U
# define SSL_SEED 0x00000800U
# define SSL_AES128GCM 0x00001000U
# define SSL_AES256GCM 0x00002000U
# define SSL_AES128CCM 0x00004000U
# define SSL_AES256CCM 0x00008000U
# define SSL_AES128CCM8 0x00010000U
# define SSL_AES256CCM8 0x00020000U
# define SSL_eGOST2814789CNT12 0x00040000U
# define SSL_CHACHA20POLY1305 0x00080000U
# define SSL_AESGCM (SSL_AES128GCM | SSL_AES256GCM)
# define SSL_AESCCM (SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8)
# define SSL_AES (SSL_AES128|SSL_AES256|SSL_AESGCM|SSL_AESCCM)
# define SSL_CAMELLIA (SSL_CAMELLIA128|SSL_CAMELLIA256)
# define SSL_CHACHA20 (SSL_CHACHA20POLY1305)
/* Bits for algorithm_mac (symmetric authentication) */
# define SSL_MD5 0x00000001U
# define SSL_SHA1 0x00000002U
# define SSL_GOST94 0x00000004U
# define SSL_GOST89MAC 0x00000008U
# define SSL_SHA256 0x00000010U
# define SSL_SHA384 0x00000020U
/* Not a real MAC, just an indication it is part of cipher */
# define SSL_AEAD 0x00000040U
# define SSL_GOST12_256 0x00000080U
# define SSL_GOST89MAC12 0x00000100U
# define SSL_GOST12_512 0x00000200U
/*
* When adding new digest in the ssl_ciph.c and increment SSL_MD_NUM_IDX make
* sure to update this constant too
*/
# define SSL_MD_MD5_IDX 0
# define SSL_MD_SHA1_IDX 1
# define SSL_MD_GOST94_IDX 2
# define SSL_MD_GOST89MAC_IDX 3
# define SSL_MD_SHA256_IDX 4
# define SSL_MD_SHA384_IDX 5
# define SSL_MD_GOST12_256_IDX 6
# define SSL_MD_GOST89MAC12_IDX 7
# define SSL_MD_GOST12_512_IDX 8
# define SSL_MD_MD5_SHA1_IDX 9
# define SSL_MD_SHA224_IDX 10
# define SSL_MD_SHA512_IDX 11
# define SSL_MAX_DIGEST 12
/* Bits for algorithm2 (handshake digests and other extra flags) */
/* Bits 0-7 are handshake MAC */
# define SSL_HANDSHAKE_MAC_MASK 0xFF
# define SSL_HANDSHAKE_MAC_MD5_SHA1 SSL_MD_MD5_SHA1_IDX
# define SSL_HANDSHAKE_MAC_SHA256 SSL_MD_SHA256_IDX
# define SSL_HANDSHAKE_MAC_SHA384 SSL_MD_SHA384_IDX
# define SSL_HANDSHAKE_MAC_GOST94 SSL_MD_GOST94_IDX
# define SSL_HANDSHAKE_MAC_GOST12_256 SSL_MD_GOST12_256_IDX
# define SSL_HANDSHAKE_MAC_GOST12_512 SSL_MD_GOST12_512_IDX
# define SSL_HANDSHAKE_MAC_DEFAULT SSL_HANDSHAKE_MAC_MD5_SHA1
/* Bits 8-15 bits are PRF */
# define TLS1_PRF_DGST_SHIFT 8
# define TLS1_PRF_SHA1_MD5 (SSL_MD_MD5_SHA1_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF_SHA256 (SSL_MD_SHA256_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF_SHA384 (SSL_MD_SHA384_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF_GOST94 (SSL_MD_GOST94_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF_GOST12_256 (SSL_MD_GOST12_256_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF_GOST12_512 (SSL_MD_GOST12_512_IDX << TLS1_PRF_DGST_SHIFT)
# define TLS1_PRF (SSL_MD_MD5_SHA1_IDX << TLS1_PRF_DGST_SHIFT)
/*
* Stream MAC for GOST ciphersuites from cryptopro draft (currently this also
* goes into algorithm2)
*/
# define TLS1_STREAM_MAC 0x10000
# define SSL_STRONG_MASK 0x0000001FU
# define SSL_DEFAULT_MASK 0X00000020U
# define SSL_STRONG_NONE 0x00000001U
# define SSL_LOW 0x00000002U
# define SSL_MEDIUM 0x00000004U
# define SSL_HIGH 0x00000008U
# define SSL_FIPS 0x00000010U
# define SSL_NOT_DEFAULT 0x00000020U
/* we have used 0000003f - 26 bits left to go */
/* Check if an SSL structure is using DTLS */
# define SSL_IS_DTLS(s) (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
/* See if we need explicit IV */
# define SSL_USE_EXPLICIT_IV(s) \
(s->method->ssl3_enc->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->method->ssl3_enc->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->method->ssl3_enc->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 >= TLS1_2_VERSION) || \
(SSL_IS_DTLS(s) && DTLS_VERSION_GE(s->client_version, DTLS1_2_VERSION)))
/*
* Determine if a client should send signature algorithms extension:
* as with TLS1.2 cipher we can't rely on method flags.
*/
# define SSL_CLIENT_USE_SIGALGS(s) \
SSL_CLIENT_USE_TLS1_2_CIPHERS(s)
# define SSL_USE_ETM(s) (s->s3->flags & TLS1_FLAGS_ENCRYPT_THEN_MAC)
/* Mostly for SSLv3 */
# define SSL_PKEY_RSA_ENC 0
# define SSL_PKEY_RSA_SIGN 1
# define SSL_PKEY_DSA_SIGN 2
# define SSL_PKEY_ECC 3
# define SSL_PKEY_GOST01 4
# define SSL_PKEY_GOST12_256 5
# define SSL_PKEY_GOST12_512 6
# define SSL_PKEY_NUM 7
/*
* Pseudo-constant. GOST cipher suites can use different certs for 1
* SSL_CIPHER. So let's see which one we have in fact.
*/
# define SSL_PKEY_GOST_EC SSL_PKEY_NUM+1
/*-
* SSL_kRSA <- RSA_ENC
* 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 CERT_INVALID 0
#define CERT_PUBLIC_KEY 1
#define CERT_PRIVATE_KEY 2
*/
/* CipherSuite length. SSLv3 and all TLS versions. */
# define TLS_CIPHER_LEN 2
/* used to hold info on the particular ciphers used */
struct ssl_cipher_st {
uint32_t valid;
const char *name; /* text name */
uint32_t id; /* id, 4 bytes, first is version */
/*
* changed in 1.0.0: these four used to be portions of a single value
* 'algorithms'
*/
uint32_t algorithm_mkey; /* key exchange algorithm */
uint32_t algorithm_auth; /* server authentication */
uint32_t algorithm_enc; /* symmetric encryption */
uint32_t algorithm_mac; /* symmetric authentication */
int min_tls; /* minimum SSL/TLS protocol version */
int max_tls; /* maximum SSL/TLS protocol version */
int min_dtls; /* minimum DTLS protocol version */
int max_dtls; /* maximum DTLS protocol version */
uint32_t algo_strength; /* strength and export flags */
uint32_t algorithm2; /* Extra flags */
int32_t strength_bits; /* Number of bits really used */
uint32_t alg_bits; /* Number of bits for algorithm */
};
/* Used to hold SSL/TLS functions */
struct ssl_method_st {
int version;
unsigned flags;
unsigned long mask;
int (*ssl_new) (SSL *s);
void (*ssl_clear) (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);
int (*ssl_read_bytes) (SSL *s, int type, int *recvd_type,
unsigned char *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);
const SSL_CIPHER *(*get_cipher_by_char) (const unsigned char *ptr);
int (*put_cipher_by_char) (const SSL_CIPHER *cipher, unsigned char *ptr);
int (*ssl_pending) (const SSL *s);
int (*num_ciphers) (void);
const SSL_CIPHER *(*get_cipher) (unsigned ncipher);
long (*get_timeout) (void);
const struct ssl3_enc_method *ssl3_enc; /* Extra SSLv3/TLS stuff */
int (*ssl_version) (void);
long (*ssl_callback_ctrl) (SSL *s, int cb_id, void (*fp) (void));
long (*ssl_ctx_callback_ctrl) (SSL_CTX *s, int cb_id, void (*fp) (void));
};
/*-
* Lets make this into an ASN.1 type structure as follows
* SSL_SESSION_ID ::= SEQUENCE {
* version INTEGER, -- structure version number
* SSLversion INTEGER, -- SSL version number
* Cipher OCTET STRING, -- the 3 byte cipher ID
* Session_ID OCTET STRING, -- the Session ID
* Master_key OCTET STRING, -- the master key
* Key_Arg [ 0 ] IMPLICIT OCTET STRING, -- the optional Key argument
* Time [ 1 ] EXPLICIT INTEGER, -- optional Start Time
* Timeout [ 2 ] EXPLICIT INTEGER, -- optional Timeout ins seconds
* Peer [ 3 ] EXPLICIT X509, -- optional Peer Certificate
* Session_ID_context [ 4 ] EXPLICIT OCTET STRING, -- the Session ID context
* Verify_result [ 5 ] EXPLICIT INTEGER, -- X509_V_... code for `Peer'
* HostName [ 6 ] EXPLICIT OCTET STRING, -- optional HostName from servername TLS extension
* PSK_identity_hint [ 7 ] EXPLICIT OCTET STRING, -- optional PSK identity hint
* PSK_identity [ 8 ] EXPLICIT OCTET STRING, -- optional PSK identity
* Ticket_lifetime_hint [9] EXPLICIT INTEGER, -- server's lifetime hint for session ticket
* Ticket [10] EXPLICIT OCTET STRING, -- session ticket (clients only)
* Compression_meth [11] EXPLICIT OCTET STRING, -- optional compression method
* SRP_username [ 12 ] EXPLICIT OCTET STRING -- optional SRP username
* flags [ 13 ] EXPLICIT INTEGER -- optional flags
* }
* Look in ssl/ssl_asn1.c for more details
* I'm using EXPLICIT tags so I can read the damn things using asn1parse :-).
*/
struct ssl_session_st {
int ssl_version; /* what ssl version session info is being kept
* in here? */
int master_key_length;
unsigned char master_key[SSL_MAX_MASTER_KEY_LENGTH];
/* session_id - valid? */
unsigned int session_id_length;
unsigned char session_id[SSL_MAX_SSL_SESSION_ID_LENGTH];
/*
* this is used to determine whether the session is being reused in the
* appropriate context. It is up to the application to set this, via
* SSL_new
*/
unsigned int sid_ctx_length;
unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
# ifndef OPENSSL_NO_PSK
char *psk_identity_hint;
char *psk_identity;
# endif
/*
* Used to indicate that session resumption is not allowed. Applications
* can also set this bit for a new session via not_resumable_session_cb
* to disable session caching and tickets.
*/
int not_resumable;
/* This is the cert and type for the other end. */
X509 *peer;
int peer_type;
/* Certificate chain peer sent */
STACK_OF(X509) *peer_chain;
/*
* when app_verify_callback accepts a session where the peer's
* certificate is not ok, we must remember the error for session reuse:
*/
long verify_result; /* only for servers */
int references;
long timeout;
long time;
unsigned int compress_meth; /* Need to lookup the method */
const SSL_CIPHER *cipher;
unsigned long cipher_id; /* when ASN.1 loaded, this needs to be used to
* load the 'cipher' structure */
STACK_OF(SSL_CIPHER) *ciphers; /* shared ciphers? */
CRYPTO_EX_DATA ex_data; /* application specific data */
/*
* These are used to make removal of session-ids more efficient and to
* implement a maximum cache size.
*/
struct ssl_session_st *prev, *next;
char *tlsext_hostname;
# ifndef OPENSSL_NO_EC
size_t tlsext_ecpointformatlist_length;
unsigned char *tlsext_ecpointformatlist; /* peer's list */
size_t tlsext_ellipticcurvelist_length;
unsigned char *tlsext_ellipticcurvelist; /* peer's list */
# endif /* OPENSSL_NO_EC */
/* RFC4507 info */
unsigned char *tlsext_tick; /* Session ticket */
size_t tlsext_ticklen; /* Session ticket length */
unsigned long tlsext_tick_lifetime_hint; /* Session lifetime hint in
* seconds */
# ifndef OPENSSL_NO_SRP
char *srp_username;
# endif
uint32_t flags;
CRYPTO_RWLOCK *lock;
};
/* Extended master secret support */
# define SSL_SESS_FLAG_EXTMS 0x1
# ifndef OPENSSL_NO_SRP
typedef struct srp_ctx_st {
/* param for all the callbacks */
void *SRP_cb_arg;
/* set client Hello login callback */
int (*TLS_ext_srp_username_callback) (SSL *, int *, void *);
/* set SRP N/g param callback for verification */
int (*SRP_verify_param_callback) (SSL *, void *);
/* set SRP client passwd callback */
char *(*SRP_give_srp_client_pwd_callback) (SSL *, void *);
char *login;
BIGNUM *N, *g, *s, *B, *A;
BIGNUM *a, *b, *v;
char *info;
int strength;
unsigned long srp_Mask;
} SRP_CTX;
# endif
struct ssl_comp_st {
int id;
const char *name;
COMP_METHOD *method;
};
DEFINE_LHASH_OF(SSL_SESSION);
/* Needed in ssl_cert.c */
DEFINE_LHASH_OF(X509_NAME);
# define TLSEXT_KEYNAME_LENGTH 16
struct ssl_ctx_st {
const SSL_METHOD *method;
STACK_OF(SSL_CIPHER) *cipher_list;
/* same as above but sorted for lookup */
STACK_OF(SSL_CIPHER) *cipher_list_by_id;
struct x509_store_st /* X509_STORE */ *cert_store;
LHASH_OF(SSL_SESSION) *sessions;
/*
* Most session-ids that will be cached, default is
* SSL_SESSION_CACHE_MAX_SIZE_DEFAULT. 0 is unlimited.
*/
unsigned long session_cache_size;
struct ssl_session_st *session_cache_head;
struct ssl_session_st *session_cache_tail;
/*
* This can have one of 2 values, ored together, SSL_SESS_CACHE_CLIENT,
* SSL_SESS_CACHE_SERVER, Default is SSL_SESSION_CACHE_SERVER, which
* means only SSL_accept which cache SSL_SESSIONS.
*/
uint32_t session_cache_mode;
/*
* If timeout is not 0, it is the default timeout value set when
* SSL_new() is called. This has been put in to make life easier to set
* things up
*/
long session_timeout;
/*
* If this callback is not null, it will be called each time a session id
* is added to the cache. If this function returns 1, it means that the
* callback will do a SSL_SESSION_free() when it has finished using it.
* Otherwise, on 0, it means the callback has finished with it. If
* remove_session_cb is not null, it will be called when a session-id is
* removed from the cache. After the call, OpenSSL will
* SSL_SESSION_free() it.
*/
int (*new_session_cb) (struct ssl_st *ssl, SSL_SESSION *sess);
void (*remove_session_cb) (struct ssl_ctx_st *ctx, SSL_SESSION *sess);
SSL_SESSION *(*get_session_cb) (struct ssl_st *ssl,
const unsigned char *data, int len,
int *copy);
struct {
int sess_connect; /* SSL new conn - started */
int sess_connect_renegotiate; /* SSL reneg - requested */
int sess_connect_good; /* SSL new conne/reneg - finished */
int sess_accept; /* SSL new accept - started */
int sess_accept_renegotiate; /* SSL reneg - requested */
int sess_accept_good; /* SSL accept/reneg - finished */
int sess_miss; /* session lookup misses */
int sess_timeout; /* reuse attempt on timeouted session */
int sess_cache_full; /* session removed due to full cache */
int sess_hit; /* session reuse actually done */
int sess_cb_hit; /* session-id that was not in the cache was
* passed back via the callback. This
* indicates that the application is supplying
* session-id's from other processes - spooky
* :-) */
} stats;
int references;
/* if defined, these override the X509_verify_cert() calls */
int (*app_verify_callback) (X509_STORE_CTX *, void *);
void *app_verify_arg;
/*
* before OpenSSL 0.9.7, 'app_verify_arg' was ignored
* ('app_verify_callback' was called with just one argument)
*/
/* Default password callback. */
pem_password_cb *default_passwd_callback;
/* Default password callback user data. */
void *default_passwd_callback_userdata;
/* get client cert callback */
int (*client_cert_cb) (SSL *ssl, X509 **x509, EVP_PKEY **pkey);
/* cookie generate callback */
int (*app_gen_cookie_cb) (SSL *ssl, unsigned char *cookie,
unsigned int *cookie_len);
/* verify cookie callback */
int (*app_verify_cookie_cb) (SSL *ssl, const unsigned char *cookie,
unsigned int cookie_len);
CRYPTO_EX_DATA ex_data;
const EVP_MD *md5; /* For SSLv3/TLSv1 'ssl3-md5' */
const EVP_MD *sha1; /* For SSLv3/TLSv1 'ssl3->sha1' */
STACK_OF(X509) *extra_certs;
STACK_OF(SSL_COMP) *comp_methods; /* stack of SSL_COMP, SSLv3/TLSv1 */
/* Default values used when no per-SSL value is defined follow */
/* used if SSL's info_callback is NULL */
void (*info_callback) (const SSL *ssl, int type, int val);
/* what we put in client cert requests */
STACK_OF(X509_NAME) *client_CA;
/*
* Default values to use in SSL structures follow (these are copied by
* SSL_new)
*/
uint32_t options;
uint32_t mode;
int min_proto_version;
int max_proto_version;
long max_cert_list;
struct cert_st /* CERT */ *cert;
int read_ahead;
/* callback that allows applications to peek at protocol messages */
void (*msg_callback) (int write_p, int version, int content_type,
const void *buf, size_t len, SSL *ssl, void *arg);
void *msg_callback_arg;
uint32_t verify_mode;
unsigned int sid_ctx_length;
unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
/* called 'verify_callback' in the SSL */
int (*default_verify_callback) (int ok, X509_STORE_CTX *ctx);
/* Default generate session ID callback. */
GEN_SESSION_CB generate_session_id;
X509_VERIFY_PARAM *param;
int quiet_shutdown;
# ifndef OPENSSL_NO_CT
CTLOG_STORE *ctlog_store; /* CT Log Store */
/*
* Validates that the SCTs (Signed Certificate Timestamps) are sufficient.
* If they are not, the connection should be aborted.
*/
ssl_ct_validation_cb ct_validation_callback;
void *ct_validation_callback_arg;
# endif
/*
* If we're using more than one pipeline how should we divide the data
* up between the pipes?
*/
unsigned int split_send_fragment;
/*
* Maximum amount of data to send in one fragment. actual record size can
* be more than this due to padding and MAC overheads.
*/
unsigned int max_send_fragment;
/* Up to how many pipelines should we use? If 0 then 1 is assumed */
unsigned int max_pipelines;
/* The default read buffer length to use (0 means not set) */
size_t default_read_buf_len;
# ifndef OPENSSL_NO_ENGINE
/*
* Engine to pass requests for client certs to
*/
ENGINE *client_cert_engine;
# endif
/* TLS extensions servername callback */
int (*tlsext_servername_callback) (SSL *, int *, void *);
void *tlsext_servername_arg;
/* RFC 4507 session ticket keys */
unsigned char tlsext_tick_key_name[TLSEXT_KEYNAME_LENGTH];
unsigned char tlsext_tick_hmac_key[32];
unsigned char tlsext_tick_aes_key[32];
/* Callback to support customisation of ticket key setting */
int (*tlsext_ticket_key_cb) (SSL *ssl,
unsigned char *name, unsigned char *iv,
EVP_CIPHER_CTX *ectx, HMAC_CTX *hctx, int enc);
/* certificate status request info */
/* Callback for status request */
int (*tlsext_status_cb) (SSL *ssl, void *arg);
void *tlsext_status_arg;
# ifndef OPENSSL_NO_PSK
unsigned int (*psk_client_callback) (SSL *ssl, const char *hint,
char *identity,
unsigned int max_identity_len,
unsigned char *psk,
unsigned int max_psk_len);
unsigned int (*psk_server_callback) (SSL *ssl, const char *identity,
unsigned char *psk,
unsigned int max_psk_len);
# endif
# ifndef OPENSSL_NO_SRP
SRP_CTX srp_ctx; /* ctx for SRP authentication */
# endif
# ifndef OPENSSL_NO_NEXTPROTONEG
/* Next protocol negotiation information */
/*
* For a server, this contains a callback function by which the set of
* advertised protocols can be provided.
*/
int (*next_protos_advertised_cb) (SSL *s, const unsigned char **buf,
unsigned int *len, void *arg);
void *next_protos_advertised_cb_arg;
/*
* For a client, this contains a callback function that selects the next
* protocol from the list provided by the server.
*/
int (*next_proto_select_cb) (SSL *s, unsigned char **out,
unsigned char *outlen,
const unsigned char *in,
unsigned int inlen, void *arg);
void *next_proto_select_cb_arg;
# endif
/*
* ALPN information (we are in the process of transitioning from NPN to
* ALPN.)
*/
/*-
* For a server, this contains a callback function that allows the
* server to select the protocol for the connection.
* out: on successful return, this must point to the raw protocol
* name (without the length prefix).
* outlen: on successful return, this contains the length of |*out|.
* in: points to the client's list of supported protocols in
* wire-format.
* inlen: the length of |in|.
*/
int (*alpn_select_cb) (SSL *s,
const unsigned char **out,
unsigned char *outlen,
const unsigned char *in,
unsigned int inlen, void *arg);
void *alpn_select_cb_arg;
/*
* For a client, this contains the list of supported protocols in wire
* format.
*/
unsigned char *alpn_client_proto_list;
unsigned alpn_client_proto_list_len;
/* Shared DANE context */
struct dane_ctx_st dane;
/* SRTP profiles we are willing to do from RFC 5764 */
STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
/*
* Callback for disabling session caching and ticket support on a session
* basis, depending on the chosen cipher.
*/
int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
# ifndef OPENSSL_NO_EC
/* EC extension values inherited by SSL structure */
size_t tlsext_ecpointformatlist_length;
unsigned char *tlsext_ecpointformatlist;
size_t tlsext_ellipticcurvelist_length;
unsigned char *tlsext_ellipticcurvelist;
# endif /* OPENSSL_NO_EC */
/* ext status type used for CSR extension (OCSP Stapling) */
int tlsext_status_type;
CRYPTO_RWLOCK *lock;
};
struct ssl_st {
/*
* protocol version (one of SSL2_VERSION, SSL3_VERSION, TLS1_VERSION,
* DTLS1_VERSION)
*/
int version;
/* SSLv3 */
const SSL_METHOD *method;
/*
* There are 2 BIO's even though they are normally both the same. This
* is so data can be read and written to different handlers
*/
/* used by SSL_read */
BIO *rbio;
/* used by SSL_write */
BIO *wbio;
/* used during session-id reuse to concatenate messages */
BIO *bbio;
/*
* This holds a variable that indicates what we were doing when a 0 or -1
* is returned. This is needed for non-blocking IO so we know what
* request needs re-doing when in SSL_accept or SSL_connect
*/
int rwstate;
int (*handshake_func) (SSL *);
/*
* Imagine that here's a boolean member "init" that is switched as soon
* as SSL_set_{accept/connect}_state is called for the first time, so
* that "state" and "handshake_func" are properly initialized. But as
* handshake_func is == 0 until then, we use this test instead of an
* "init" member.
*/
/* are we the server side? */
int server;
/*
* Generate a new session or reuse an old one.
* NB: For servers, the 'new' session may actually be a previously
* cached session or even the previous session unless
* SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set
*/
int new_session;
/* don't send shutdown packets */
int quiet_shutdown;
/* we have shut things down, 0x01 sent, 0x02 for received */
int shutdown;
/* where we are */
OSSL_STATEM statem;
BUF_MEM *init_buf; /* buffer used during init */
void *init_msg; /* pointer to handshake message body, set by
* ssl3_get_message() */
int init_num; /* amount read/written */
int init_off; /* amount read/written */
struct ssl3_state_st *s3; /* SSLv3 variables */
struct dtls1_state_st *d1; /* DTLSv1 variables */
/* callback that allows applications to peek at protocol messages */
void (*msg_callback) (int write_p, int version, int content_type,
const void *buf, size_t len, SSL *ssl, void *arg);
void *msg_callback_arg;
int hit; /* reusing a previous session */
X509_VERIFY_PARAM *param;
/* Per connection DANE state */
SSL_DANE dane;
/* crypto */
STACK_OF(SSL_CIPHER) *cipher_list;
STACK_OF(SSL_CIPHER) *cipher_list_by_id;
/*
* These are the ones being used, the ones in SSL_SESSION are the ones to
* be 'copied' into these ones
*/
uint32_t mac_flags;
EVP_CIPHER_CTX *enc_read_ctx; /* cryptographic state */
EVP_MD_CTX *read_hash; /* used for mac generation */
COMP_CTX *compress; /* compression */
COMP_CTX *expand; /* uncompress */
EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
EVP_MD_CTX *write_hash; /* used for mac generation */
/* session info */
/* client cert? */
/* This is used to hold the server certificate used */
struct cert_st /* CERT */ *cert;
/*
* the session_id_context is used to ensure sessions are only reused in
* the appropriate context
*/
unsigned int sid_ctx_length;
unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
/* This can also be in the session once a session is established */
SSL_SESSION *session;
/* Default generate session ID callback. */
GEN_SESSION_CB generate_session_id;
/* Used in SSL3 */
/*
* 0 don't care about verify failure.
* 1 fail if verify fails
*/
uint32_t verify_mode;
/* fail if callback returns 0 */
int (*verify_callback) (int ok, X509_STORE_CTX *ctx);
/* optional informational callback */
void (*info_callback) (const SSL *ssl, int type, int val);
/* error bytes to be written */
int error;
/* actual code */
int error_code;
# ifndef OPENSSL_NO_PSK
unsigned int (*psk_client_callback) (SSL *ssl, const char *hint,
char *identity,
unsigned int max_identity_len,
unsigned char *psk,
unsigned int max_psk_len);
unsigned int (*psk_server_callback) (SSL *ssl, const char *identity,
unsigned char *psk,
unsigned int max_psk_len);
# endif
SSL_CTX *ctx;
/* Verified chain of peer */
STACK_OF(X509) *verified_chain;
long verify_result;
/* extra application data */
CRYPTO_EX_DATA ex_data;
/* for server side, keep the list of CA_dn we can use */
STACK_OF(X509_NAME) *client_CA;
int references;
/* protocol behaviour */
uint32_t options;
/* API behaviour */
uint32_t mode;
int min_proto_version;
int max_proto_version;
long max_cert_list;
int first_packet;
/* what was passed, used for SSLv3/TLS rollback check */
int client_version;
/*
* If we're using more than one pipeline how should we divide the data
* up between the pipes?
*/
unsigned int split_send_fragment;
/*
* Maximum amount of data to send in one fragment. actual record size can
* be more than this due to padding and MAC overheads.
*/
unsigned int max_send_fragment;
/* Up to how many pipelines should we use? If 0 then 1 is assumed */
unsigned int max_pipelines;
/* TLS extension debug callback */
void (*tlsext_debug_cb) (SSL *s, int client_server, int type,
const unsigned char *data, int len, void *arg);
void *tlsext_debug_arg;
char *tlsext_hostname;
/*-
* no further mod of servername
* 0 : call the servername extension callback.
* 1 : prepare 2, allow last ack just after in server callback.
* 2 : don't call servername callback, no ack in server hello
*/
int servername_done;
/* certificate status request info */
/* Status type or -1 if no status type */
int tlsext_status_type;
# ifndef OPENSSL_NO_CT
/*
* Validates that the SCTs (Signed Certificate Timestamps) are sufficient.
* If they are not, the connection should be aborted.
*/
ssl_ct_validation_cb ct_validation_callback;
/* User-supplied argument tha tis passed to the ct_validation_callback */
void *ct_validation_callback_arg;
/*
* Consolidated stack of SCTs from all sources.
* Lazily populated by CT_get_peer_scts(SSL*)
*/
STACK_OF(SCT) *scts;
/* Raw extension data, if seen */
unsigned char *tlsext_scts;
/* Length of raw extension data, if seen */
uint16_t tlsext_scts_len;
/* Have we attempted to find/parse SCTs yet? */
int scts_parsed;
# endif
/* Expect OCSP CertificateStatus message */
int tlsext_status_expected;
/* OCSP status request only */
STACK_OF(OCSP_RESPID) *tlsext_ocsp_ids;
X509_EXTENSIONS *tlsext_ocsp_exts;
/* OCSP response received or to be sent */
unsigned char *tlsext_ocsp_resp;
int tlsext_ocsp_resplen;
/* RFC4507 session ticket expected to be received or sent */
int tlsext_ticket_expected;
# ifndef OPENSSL_NO_EC
size_t tlsext_ecpointformatlist_length;
/* our list */
unsigned char *tlsext_ecpointformatlist;
size_t tlsext_ellipticcurvelist_length;
/* our list */
unsigned char *tlsext_ellipticcurvelist;
# endif /* OPENSSL_NO_EC */
/* TLS Session Ticket extension override */
TLS_SESSION_TICKET_EXT *tlsext_session_ticket;
/* TLS Session Ticket extension callback */
tls_session_ticket_ext_cb_fn tls_session_ticket_ext_cb;
void *tls_session_ticket_ext_cb_arg;
/* TLS pre-shared secret session resumption */
tls_session_secret_cb_fn tls_session_secret_cb;
void *tls_session_secret_cb_arg;
SSL_CTX *initial_ctx; /* initial ctx, used to store sessions */
# ifndef OPENSSL_NO_NEXTPROTONEG
/*
* Next protocol negotiation. For the client, this is the protocol that
* we sent in NextProtocol and is set when handling ServerHello
* extensions. For a server, this is the client's selected_protocol from
* NextProtocol and is set when handling the NextProtocol message, before
* the Finished message.
*/
unsigned char *next_proto_negotiated;
unsigned char next_proto_negotiated_len;
# endif
# define session_ctx initial_ctx
/* What we'll do */
STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
/* What's been chosen */
SRTP_PROTECTION_PROFILE *srtp_profile;
/*-
* Is use of the Heartbeat extension negotiated?
* 0: disabled
* 1: enabled
* 2: enabled, but not allowed to send Requests
*/
unsigned int tlsext_heartbeat;
/* Indicates if a HeartbeatRequest is in flight */
unsigned int tlsext_hb_pending;
/* HeartbeatRequest sequence number */
unsigned int tlsext_hb_seq;
/*
* For a client, this contains the list of supported protocols in wire
* format.
*/
unsigned char *alpn_client_proto_list;
unsigned alpn_client_proto_list_len;
/*-
* 1 if we are renegotiating.
* 2 if we are a server and are inside a handshake
* (i.e. not just sending a HelloRequest)
*/
int renegotiate;
# ifndef OPENSSL_NO_SRP
/* ctx for SRP authentication */
SRP_CTX srp_ctx;
# endif
/*
* Callback for disabling session caching and ticket support on a session
* basis, depending on the chosen cipher.
*/
int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
RECORD_LAYER rlayer;
/* Default password callback. */
pem_password_cb *default_passwd_callback;
/* Default password callback user data. */
void *default_passwd_callback_userdata;
/* Async Job info */
ASYNC_JOB *job;
ASYNC_WAIT_CTX *waitctx;
CRYPTO_RWLOCK *lock;
};
typedef struct ssl3_state_st {
long flags;
int read_mac_secret_size;
unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
int write_mac_secret_size;
unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
unsigned char server_random[SSL3_RANDOM_SIZE];
unsigned char client_random[SSL3_RANDOM_SIZE];
/* flags for countermeasure against known-IV weakness */
int need_empty_fragments;
int empty_fragment_done;
/* used during startup, digest all incoming/outgoing packets */
BIO *handshake_buffer;
/*
* When handshake digest is determined, buffer is hashed and
* freed and MD_CTX for the required digest is stored here.
*/
EVP_MD_CTX *handshake_dgst;
/*
* Set whenever an expected ChangeCipherSpec message is processed.
* Unset when the peer's Finished message is received.
* Unexpected ChangeCipherSpec messages trigger a fatal alert.
*/
int change_cipher_spec;
int warn_alert;
int fatal_alert;
/*
* we allow one fatal and one warning alert to be outstanding, send close
* alert via the warning alert
*/
int alert_dispatch;
unsigned char send_alert[2];
/*
* This flag is set when we should renegotiate ASAP, basically when there
* is no more data in the read or write buffers
*/
int renegotiate;
int total_renegotiations;
int num_renegotiations;
int in_read_app_data;
struct {
/* actually only need to be 16+20 for SSLv3 and 12 for TLS */
unsigned char finish_md[EVP_MAX_MD_SIZE * 2];
int finish_md_len;
unsigned char peer_finish_md[EVP_MAX_MD_SIZE * 2];
int peer_finish_md_len;
unsigned long message_size;
int message_type;
/* used to hold the new cipher we are going to use */
const SSL_CIPHER *new_cipher;
# if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
EVP_PKEY *pkey; /* holds short lived DH/ECDH key */
# endif
/* used for certificate requests */
int cert_req;
int ctype_num;
char ctype[SSL3_CT_NUMBER];
STACK_OF(X509_NAME) *ca_names;
int key_block_length;
unsigned char *key_block;
const EVP_CIPHER *new_sym_enc;
const EVP_MD *new_hash;
int new_mac_pkey_type;
int new_mac_secret_size;
# ifndef OPENSSL_NO_COMP
const SSL_COMP *new_compression;
# else
char *new_compression;
# endif
int cert_request;
/* Raw values of the cipher list from a client */
unsigned char *ciphers_raw;
size_t ciphers_rawlen;
/* Temporary storage for premaster secret */
unsigned char *pms;
size_t pmslen;
# ifndef OPENSSL_NO_PSK
/* Temporary storage for PSK key */
unsigned char *psk;
size_t psklen;
# endif
/*
* signature algorithms peer reports: e.g. supported signature
* algorithms extension for server or as part of a certificate
* request for client.
*/
unsigned char *peer_sigalgs;
/* Size of above array */
size_t peer_sigalgslen;
/* Digest peer uses for signing */
const EVP_MD *peer_md;
/* Array of digests used for signing */
const EVP_MD *md[SSL_PKEY_NUM];
/*
* Set if corresponding CERT_PKEY can be used with current
* SSL session: e.g. appropriate curve, signature algorithms etc.
* If zero it can't be used at all.
*/
uint32_t valid_flags[SSL_PKEY_NUM];
/*
* For servers the following masks are for the key and auth algorithms
* that are supported by the certs below. For clients they are masks of
* *disabled* algorithms based on the current session.
*/
uint32_t mask_k;
uint32_t mask_a;
/*
* The following are used by the client to see if a cipher is allowed or
* not. It contains the minimum and maximum version the client's using
* based on what it knows so far.
*/
int min_ver;
int max_ver;
} tmp;
/* Connection binding to prevent renegotiation attacks */
unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
unsigned char previous_client_finished_len;
unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
unsigned char previous_server_finished_len;
int send_connection_binding; /* TODOEKR */
# ifndef OPENSSL_NO_NEXTPROTONEG
/*
* Set if we saw the Next Protocol Negotiation extension from our peer.
*/
int next_proto_neg_seen;
# endif
/*
* ALPN information (we are in the process of transitioning from NPN to
* ALPN.)
*/
/*
* In a server these point to the selected ALPN protocol after the
* ClientHello has been processed. In a client these contain the protocol
* that the server selected once the ServerHello has been processed.
*/
unsigned char *alpn_selected;
size_t alpn_selected_len;
/* used by the server to know what options were proposed */
unsigned char *alpn_proposed;
size_t alpn_proposed_len;
/* used by the client to know if it actually sent alpn */
int alpn_sent;
# ifndef OPENSSL_NO_EC
/*
* This is set to true if we believe that this is a version of Safari
* running on OS X 10.6 or newer. We wish to know this because Safari on
* 10.8 .. 10.8.3 has broken ECDHE-ECDSA support.
*/
char is_probably_safari;
# endif /* !OPENSSL_NO_EC */
/* For clients: peer temporary key */
# if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
EVP_PKEY *peer_tmp;
# endif
} SSL3_STATE;
/* DTLS structures */
# ifndef OPENSSL_NO_SCTP
# define DTLS1_SCTP_AUTH_LABEL "EXPORTER_DTLS_OVER_SCTP"
# endif
/* Max MTU overhead we know about so far is 40 for IPv6 + 8 for UDP */
# define DTLS1_MAX_MTU_OVERHEAD 48
/*
* Flag used in message reuse to indicate the buffer contains the record
* header as well as the the handshake message header.
*/
# define DTLS1_SKIP_RECORD_HEADER 2
struct dtls1_retransmit_state {
EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
EVP_MD_CTX *write_hash; /* used for mac generation */
COMP_CTX *compress; /* compression */
SSL_SESSION *session;
unsigned short epoch;
};
struct hm_header_st {
unsigned char type;
unsigned long msg_len;
unsigned short seq;
unsigned long frag_off;
unsigned long frag_len;
unsigned int is_ccs;
struct dtls1_retransmit_state saved_retransmit_state;
};
struct dtls1_timeout_st {
/* Number of read timeouts so far */
unsigned int read_timeouts;
/* Number of write timeouts so far */
unsigned int write_timeouts;
/* Number of alerts received so far */
unsigned int num_alerts;
};
typedef struct hm_fragment_st {
struct hm_header_st msg_header;
unsigned char *fragment;
unsigned char *reassembly;
} hm_fragment;
typedef struct pqueue_st pqueue;
typedef struct pitem_st pitem;
struct pitem_st {
unsigned char priority[8]; /* 64-bit value in big-endian encoding */
void *data;
pitem *next;
};
typedef struct pitem_st *piterator;
pitem *pitem_new(unsigned char *prio64be, void *data);
void pitem_free(pitem *item);
pqueue *pqueue_new(void);
void pqueue_free(pqueue *pq);
pitem *pqueue_insert(pqueue *pq, pitem *item);
pitem *pqueue_peek(pqueue *pq);
pitem *pqueue_pop(pqueue *pq);
pitem *pqueue_find(pqueue *pq, unsigned char *prio64be);
pitem *pqueue_iterator(pqueue *pq);
pitem *pqueue_next(piterator *iter);
int pqueue_size(pqueue *pq);
typedef struct dtls1_state_st {
unsigned char cookie[DTLS1_COOKIE_LENGTH];
unsigned int cookie_len;
unsigned int cookie_verified;
/* handshake message numbers */
unsigned short handshake_write_seq;
unsigned short next_handshake_write_seq;
unsigned short handshake_read_seq;
/* Buffered handshake messages */
pqueue *buffered_messages;
/* Buffered (sent) handshake records */
pqueue *sent_messages;
unsigned int link_mtu; /* max on-the-wire DTLS packet size */
unsigned int mtu; /* max DTLS packet size */
struct hm_header_st w_msg_hdr;
struct hm_header_st r_msg_hdr;
struct dtls1_timeout_st timeout;
/*
* Indicates when the last handshake msg or heartbeat sent will timeout
*/
struct timeval next_timeout;
/* Timeout duration */
unsigned short timeout_duration;
unsigned int retransmitting;
# ifndef OPENSSL_NO_SCTP
int shutdown_received;
# endif
} DTLS1_STATE;
# ifndef OPENSSL_NO_EC
/*
* From ECC-TLS draft, 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
# endif /* OPENSSL_NO_EC */
typedef struct cert_pkey_st {
X509 *x509;
EVP_PKEY *privatekey;
/* Chain for this certificate */
STACK_OF(X509) *chain;
/*-
* serverinfo data for this certificate. The data is in TLS Extension
* wire format, specifically it's a series of records like:
* uint16_t extension_type; // (RFC 5246, 7.4.1.4, Extension)
* uint16_t length;
* uint8_t data[length];
*/
unsigned char *serverinfo;
size_t serverinfo_length;
} CERT_PKEY;
/* Retrieve Suite B flags */
# define tls1_suiteb(s) (s->cert->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS)
/* Uses to check strict mode: suite B modes are always strict */
# define SSL_CERT_FLAGS_CHECK_TLS_STRICT \
(SSL_CERT_FLAG_SUITEB_128_LOS|SSL_CERT_FLAG_TLS_STRICT)
typedef struct {
unsigned short ext_type;
/*
* Per-connection flags relating to this extension type: not used if
* part of an SSL_CTX structure.
*/
uint32_t ext_flags;
custom_ext_add_cb add_cb;
custom_ext_free_cb free_cb;
void *add_arg;
custom_ext_parse_cb parse_cb;
void *parse_arg;
} custom_ext_method;
/* ext_flags values */
/*
* Indicates an extension has been received. Used to check for unsolicited or
* duplicate extensions.
*/
# define SSL_EXT_FLAG_RECEIVED 0x1
/*
* Indicates an extension has been sent: used to enable sending of
* corresponding ServerHello extension.
*/
# define SSL_EXT_FLAG_SENT 0x2
typedef struct {
custom_ext_method *meths;
size_t meths_count;
} custom_ext_methods;
typedef struct cert_st {
/* Current active set */
/*
* ALWAYS points to an element of the pkeys array
* Probably it would make more sense to store
* an index, not a pointer.
*/
CERT_PKEY *key;
# ifndef OPENSSL_NO_DH
EVP_PKEY *dh_tmp;
DH *(*dh_tmp_cb) (SSL *ssl, int is_export, int keysize);
int dh_tmp_auto;
# endif
/* Flags related to certificates */
uint32_t cert_flags;
CERT_PKEY pkeys[SSL_PKEY_NUM];
/*
* Certificate types (received or sent) in certificate request message.
* On receive this is only set if number of certificate types exceeds
* SSL3_CT_NUMBER.
*/
unsigned char *ctypes;
size_t ctype_num;
/*
* supported 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.
*/
unsigned char *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.
*/
unsigned char *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;
/* Custom extension methods for server and client */
custom_ext_methods cli_ext;
custom_ext_methods srv_ext;
/* Security callback */
int (*sec_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
void *other, void *ex);
/* Security level */
int sec_level;
void *sec_ex;
# ifndef OPENSSL_NO_PSK
/* If not NULL psk identity hint to use for servers */
char *psk_identity_hint;
# endif
int references; /* >1 only if SSL_copy_session_id is used */
CRYPTO_RWLOCK *lock;
} 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 */
unsigned char rsign;
unsigned char rhash;
};
# define FP_ICC (int (*)(const void *,const void *))
/*
* 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 :-)
*/
typedef struct ssl3_enc_method {
int (*enc) (SSL *, SSL3_RECORD *, unsigned int, int);
int (*mac) (SSL *, SSL3_RECORD *, unsigned char *, int);
int (*setup_key_block) (SSL *);
int (*generate_master_secret) (SSL *, unsigned char *, unsigned char *,
int);
int (*change_cipher_state) (SSL *, int);
int (*final_finish_mac) (SSL *, const char *, int, unsigned char *);
int finish_mac_length;
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 *, unsigned char *, size_t,
const char *, size_t,
const unsigned char *, size_t,
int use_context);
/* Various flags indicating protocol version requirements */
uint32_t enc_flags;
/* 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);
} SSL3_ENC_METHOD;
# define SSL_HM_HEADER_LENGTH(s) s->method->ssl3_enc->hhlen
# define ssl_handshake_start(s) \
(((unsigned char *)s->init_buf->data) + s->method->ssl3_enc->hhlen)
# define ssl_set_handshake_header(s, htype, len) \
s->method->ssl3_enc->set_handshake_header(s, htype, len)
# define ssl_do_write(s) s->method->ssl3_enc->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
/* Is DTLS */
# define SSL_ENC_FLAG_DTLS 0x8
/*
* 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 0x10
# ifndef OPENSSL_NO_COMP
/* Used for holding the relevant compression methods loaded into SSL_CTX */
typedef struct ssl3_comp_st {
int comp_id; /* The identifier byte for this compression
* type */
char *name; /* Text name used for the compression type */
COMP_METHOD *method; /* The method :-) */
} SSL3_COMP;
# endif
extern SSL3_ENC_METHOD ssl3_undef_enc_method;
__owur const SSL_METHOD *ssl_bad_method(int ver);
__owur const SSL_METHOD *sslv3_method(void);
__owur const SSL_METHOD *sslv3_server_method(void);
__owur const SSL_METHOD *sslv3_client_method(void);
__owur const SSL_METHOD *tlsv1_method(void);
__owur const SSL_METHOD *tlsv1_server_method(void);
__owur const SSL_METHOD *tlsv1_client_method(void);
__owur const SSL_METHOD *tlsv1_1_method(void);
__owur const SSL_METHOD *tlsv1_1_server_method(void);
__owur const SSL_METHOD *tlsv1_1_client_method(void);
__owur const SSL_METHOD *tlsv1_2_method(void);
__owur const SSL_METHOD *tlsv1_2_server_method(void);
__owur const SSL_METHOD *tlsv1_2_client_method(void);
__owur const SSL_METHOD *dtlsv1_method(void);
__owur const SSL_METHOD *dtlsv1_server_method(void);
__owur const SSL_METHOD *dtlsv1_client_method(void);
__owur const SSL_METHOD *dtls_bad_ver_client_method(void);
__owur const SSL_METHOD *dtlsv1_2_method(void);
__owur const SSL_METHOD *dtlsv1_2_server_method(void);
__owur const SSL_METHOD *dtlsv1_2_client_method(void);
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;
extern const SSL3_ENC_METHOD DTLSv1_enc_data;
extern const SSL3_ENC_METHOD DTLSv1_2_enc_data;
/*
* Flags for SSL methods
*/
# define SSL_METHOD_NO_FIPS (1U<<0)
# define SSL_METHOD_NO_SUITEB (1U<<1)
# define IMPLEMENT_tls_meth_func(version, flags, mask, func_name, s_accept, \
s_connect, enc_data) \
const SSL_METHOD *func_name(void) \
{ \
static const SSL_METHOD func_name##_data= { \
version, \
flags, \
mask, \
tls1_new, \
tls1_clear, \
tls1_free, \
s_accept, \
s_connect, \
ssl3_read, \
ssl3_peek, \
ssl3_write, \
ssl3_shutdown, \
ssl3_renegotiate, \
ssl3_renegotiate_check, \
ssl3_read_bytes, \
ssl3_write_bytes, \
ssl3_dispatch_alert, \
ssl3_ctrl, \
ssl3_ctx_ctrl, \
ssl3_get_cipher_by_char, \
ssl3_put_cipher_by_char, \
ssl3_pending, \
ssl3_num_ciphers, \
ssl3_get_cipher, \
tls1_default_timeout, \
&enc_data, \
ssl_undefined_void_function, \
ssl3_callback_ctrl, \
ssl3_ctx_callback_ctrl, \
}; \
return &func_name##_data; \
}
# define IMPLEMENT_ssl3_meth_func(func_name, s_accept, s_connect) \
const SSL_METHOD *func_name(void) \
{ \
static const SSL_METHOD func_name##_data= { \
SSL3_VERSION, \
SSL_METHOD_NO_FIPS | SSL_METHOD_NO_SUITEB, \
SSL_OP_NO_SSLv3, \
ssl3_new, \
ssl3_clear, \
ssl3_free, \
s_accept, \
s_connect, \
ssl3_read, \
ssl3_peek, \
ssl3_write, \
ssl3_shutdown, \
ssl3_renegotiate, \
ssl3_renegotiate_check, \
ssl3_read_bytes, \
ssl3_write_bytes, \
ssl3_dispatch_alert, \
ssl3_ctrl, \
ssl3_ctx_ctrl, \
ssl3_get_cipher_by_char, \
ssl3_put_cipher_by_char, \
ssl3_pending, \
ssl3_num_ciphers, \
ssl3_get_cipher, \
ssl3_default_timeout, \
&SSLv3_enc_data, \
ssl_undefined_void_function, \
ssl3_callback_ctrl, \
ssl3_ctx_callback_ctrl, \
}; \
return &func_name##_data; \
}
# define IMPLEMENT_dtls1_meth_func(version, flags, mask, func_name, s_accept, \
s_connect, enc_data) \
const SSL_METHOD *func_name(void) \
{ \
static const SSL_METHOD func_name##_data= { \
version, \
flags, \
mask, \
dtls1_new, \
dtls1_clear, \
dtls1_free, \
s_accept, \
s_connect, \
ssl3_read, \
ssl3_peek, \
ssl3_write, \
dtls1_shutdown, \
ssl3_renegotiate, \
ssl3_renegotiate_check, \
dtls1_read_bytes, \
dtls1_write_app_data_bytes, \
dtls1_dispatch_alert, \
dtls1_ctrl, \
ssl3_ctx_ctrl, \
ssl3_get_cipher_by_char, \
ssl3_put_cipher_by_char, \
ssl3_pending, \
ssl3_num_ciphers, \
ssl3_get_cipher, \
dtls1_default_timeout, \
&enc_data, \
ssl_undefined_void_function, \
ssl3_callback_ctrl, \
ssl3_ctx_callback_ctrl, \
}; \
return &func_name##_data; \
}
struct openssl_ssl_test_functions {
int (*p_ssl_init_wbio_buffer) (SSL *s);
int (*p_ssl3_setup_buffers) (SSL *s);
# ifndef OPENSSL_NO_HEARTBEATS
int (*p_dtls1_process_heartbeat) (SSL *s,
unsigned char *p, unsigned int length);
# endif
};
const char *ssl_protocol_to_string(int version);
# ifndef OPENSSL_UNIT_TEST
void ssl_clear_cipher_ctx(SSL *s);
int ssl_clear_bad_session(SSL *s);
__owur CERT *ssl_cert_new(void);
__owur CERT *ssl_cert_dup(CERT *cert);
void ssl_cert_clear_certs(CERT *c);
void ssl_cert_free(CERT *c);
__owur int ssl_get_new_session(SSL *s, int session);
__owur int ssl_get_prev_session(SSL *s, const PACKET *ext,
const PACKET *session_id);
__owur SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket);
__owur int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b);
DECLARE_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
__owur int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
const SSL_CIPHER *const *bp);
__owur STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *meth,
STACK_OF(SSL_CIPHER) **pref,
STACK_OF(SSL_CIPHER)
**sorted,
const char *rule_str,
CERT *c);
void ssl_update_cache(SSL *s, int mode);
__owur int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
const EVP_MD **md, int *mac_pkey_type,
int *mac_secret_size, SSL_COMP **comp,
int use_etm);
__owur int ssl_cipher_get_cert_index(const SSL_CIPHER *c);
__owur const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl,
const unsigned char *ptr);
__owur int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain);
__owur int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain);
__owur int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x);
__owur int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x);
__owur int ssl_cert_select_current(CERT *c, X509 *x);
__owur int ssl_cert_set_current(CERT *c, long arg);
__owur X509 *ssl_cert_get0_next_certificate(CERT *c, int first);
void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg);
__owur int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk);
__owur int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l);
__owur int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags);
__owur int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain,
int ref);
__owur int ssl_security(const SSL *s, int op, int bits, int nid, void *other);
__owur int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid,
void *other);
int ssl_undefined_function(SSL *s);
__owur int ssl_undefined_void_function(void);
__owur int ssl_undefined_const_function(const SSL *s);
__owur CERT_PKEY *ssl_get_server_send_pkey(SSL *s);
__owur int ssl_get_server_cert_serverinfo(SSL *s,
const unsigned char **serverinfo,
size_t *serverinfo_length);
__owur EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *c,
const EVP_MD **pmd);
__owur int ssl_cert_type(const X509 *x, const EVP_PKEY *pkey);
void ssl_set_masks(SSL *s);
__owur STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s);
__owur int ssl_verify_alarm_type(long type);
void ssl_sort_cipher_list(void);
void ssl_load_ciphers(void);
__owur int ssl_fill_hello_random(SSL *s, int server, unsigned char *field,
int len);
__owur int ssl_generate_master_secret(SSL *s, unsigned char *pms, size_t pmslen,
int free_pms);
__owur EVP_PKEY *ssl_generate_pkey(EVP_PKEY *pm);
__owur int ssl_derive(SSL *s, EVP_PKEY *privkey, EVP_PKEY *pubkey);
__owur EVP_PKEY *ssl_dh_to_pkey(DH *dh);
__owur const SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p);
__owur int ssl3_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
int ssl3_init_finished_mac(SSL *s);
__owur int ssl3_setup_key_block(SSL *s);
__owur int ssl3_change_cipher_state(SSL *s, int which);
void ssl3_cleanup_key_block(SSL *s);
__owur int ssl3_do_write(SSL *s, int type);
int ssl3_send_alert(SSL *s, int level, int desc);
__owur int ssl3_generate_master_secret(SSL *s, unsigned char *out,
unsigned char *p, int len);
__owur int ssl3_get_req_cert_type(SSL *s, unsigned char *p);
__owur int ssl3_num_ciphers(void);
__owur const SSL_CIPHER *ssl3_get_cipher(unsigned int u);
int ssl3_renegotiate(SSL *ssl);
int ssl3_renegotiate_check(SSL *ssl);
__owur int ssl3_dispatch_alert(SSL *s);
__owur int ssl3_final_finish_mac(SSL *s, const char *sender, int slen,
unsigned char *p);
__owur int ssl3_finish_mac(SSL *s, const unsigned char *buf, int len);
void ssl3_free_digest_list(SSL *s);
__owur unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk);
__owur const SSL_CIPHER *ssl3_choose_cipher(SSL *ssl,
STACK_OF(SSL_CIPHER) *clnt,
STACK_OF(SSL_CIPHER) *srvr);
__owur int ssl3_digest_cached_records(SSL *s, int keep);
__owur int ssl3_new(SSL *s);
void ssl3_free(SSL *s);
__owur int ssl3_read(SSL *s, void *buf, int len);
__owur int ssl3_peek(SSL *s, void *buf, int len);
__owur int ssl3_write(SSL *s, const void *buf, int len);
__owur int ssl3_shutdown(SSL *s);
void ssl3_clear(SSL *s);
__owur long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg);
__owur long ssl3_ctx_ctrl(SSL_CTX *s, int cmd, long larg, void *parg);
__owur long ssl3_callback_ctrl(SSL *s, int cmd, void (*fp) (void));
__owur long ssl3_ctx_callback_ctrl(SSL_CTX *s, int cmd, void (*fp) (void));
__owur int ssl3_do_change_cipher_spec(SSL *ssl);
__owur long ssl3_default_timeout(void);
__owur int ssl3_set_handshake_header(SSL *s, int htype, unsigned long len);
__owur int ssl3_handshake_write(SSL *s);
__owur int ssl_allow_compression(SSL *s);
__owur int ssl_version_supported(const SSL *s, int version);
__owur int ssl_set_client_hello_version(SSL *s);
__owur int ssl_check_version_downgrade(SSL *s);
__owur int ssl_set_version_bound(int method_version, int version, int *bound);
__owur int ssl_choose_server_version(SSL *s);
__owur int ssl_choose_client_version(SSL *s, int version);
int ssl_get_client_min_max_version(const SSL *s, int *min_version,
int *max_version);
__owur long tls1_default_timeout(void);
__owur int dtls1_do_write(SSL *s, int type);
void dtls1_set_message_header(SSL *s,
unsigned char mt,
unsigned long len,
unsigned long frag_off, unsigned long frag_len);
__owur int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf,
int len);
__owur int dtls1_read_failed(SSL *s, int code);
__owur int dtls1_buffer_message(SSL *s, int ccs);
__owur int dtls1_retransmit_message(SSL *s, unsigned short seq, int *found);
__owur int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
int dtls1_retransmit_buffered_messages(SSL *s);
void dtls1_clear_received_buffer(SSL *s);
void dtls1_clear_sent_buffer(SSL *s);
void dtls1_get_message_header(unsigned char *data,
struct hm_header_st *msg_hdr);
__owur long dtls1_default_timeout(void);
__owur struct timeval *dtls1_get_timeout(SSL *s, struct timeval *timeleft);
__owur int dtls1_check_timeout_num(SSL *s);
__owur int dtls1_handle_timeout(SSL *s);
void dtls1_start_timer(SSL *s);
void dtls1_stop_timer(SSL *s);
__owur int dtls1_is_timer_expired(SSL *s);
void dtls1_double_timeout(SSL *s);
__owur unsigned int dtls_raw_hello_verify_request(unsigned char *buf,
unsigned char *cookie,
unsigned char cookie_len);
__owur int dtls1_send_newsession_ticket(SSL *s);
__owur unsigned int dtls1_min_mtu(SSL *s);
void dtls1_hm_fragment_free(hm_fragment *frag);
__owur int dtls1_query_mtu(SSL *s);
__owur int tls1_new(SSL *s);
void tls1_free(SSL *s);
void tls1_clear(SSL *s);
long tls1_ctrl(SSL *s, int cmd, long larg, void *parg);
long tls1_callback_ctrl(SSL *s, int cmd, void (*fp) (void));
__owur int dtls1_new(SSL *s);
void dtls1_free(SSL *s);
void dtls1_clear(SSL *s);
long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
__owur int dtls1_shutdown(SSL *s);
__owur int dtls1_dispatch_alert(SSL *s);
__owur int ssl_init_wbio_buffer(SSL *s);
void ssl_free_wbio_buffer(SSL *s);
__owur int tls1_change_cipher_state(SSL *s, int which);
__owur int tls1_setup_key_block(SSL *s);
__owur int tls1_final_finish_mac(SSL *s,
const char *str, int slen, unsigned char *p);
__owur int tls1_generate_master_secret(SSL *s, unsigned char *out,
unsigned char *p, int len);
__owur int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
const char *label, size_t llen,
const unsigned char *p, size_t plen,
int use_context);
__owur int tls1_alert_code(int code);
__owur int ssl3_alert_code(int code);
__owur int ssl_ok(SSL *s);
# ifndef OPENSSL_NO_EC
__owur int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s);
# endif
SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n);
# ifndef OPENSSL_NO_EC
/* Flags values from tls1_ec_curve_id2nid() */
/* Mask for curve type */
# define TLS_CURVE_TYPE 0x3
# define TLS_CURVE_PRIME 0x0
# define TLS_CURVE_CHAR2 0x1
# define TLS_CURVE_CUSTOM 0x2
__owur int tls1_ec_curve_id2nid(int curve_id, unsigned int *pflags);
__owur int tls1_ec_nid2curve_id(int nid);
__owur int tls1_check_curve(SSL *s, const unsigned char *p, size_t len);
__owur int tls1_shared_curve(SSL *s, int nmatch);
__owur int tls1_set_curves(unsigned char **pext, size_t *pextlen,
int *curves, size_t ncurves);
__owur int tls1_set_curves_list(unsigned char **pext, size_t *pextlen,
const char *str);
__owur int tls1_check_ec_tmp_key(SSL *s, unsigned long id);
__owur EVP_PKEY *ssl_generate_pkey_curve(int id);
# endif /* OPENSSL_NO_EC */
__owur int tls1_shared_list(SSL *s,
const unsigned char *l1, size_t l1len,
const unsigned char *l2, size_t l2len, int nmatch);
__owur unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf,
unsigned char *limit, int *al);
__owur unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *buf,
unsigned char *limit, int *al);
__owur int ssl_parse_clienthello_tlsext(SSL *s, PACKET *pkt);
void ssl_set_default_md(SSL *s);
__owur int tls1_set_server_sigalgs(SSL *s);
__owur int ssl_check_clienthello_tlsext_late(SSL *s, int *al);
__owur int ssl_parse_serverhello_tlsext(SSL *s, PACKET *pkt);
__owur int ssl_prepare_clienthello_tlsext(SSL *s);
__owur int ssl_prepare_serverhello_tlsext(SSL *s);
# ifndef OPENSSL_NO_HEARTBEATS
__owur int dtls1_heartbeat(SSL *s);
__owur int dtls1_process_heartbeat(SSL *s, unsigned char *p,
unsigned int length);
# endif
__owur int tls_check_serverhello_tlsext_early(SSL *s, const PACKET *ext,
const PACKET *session_id,
SSL_SESSION **ret);
__owur int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk,
const EVP_MD *md);
__owur int tls12_get_sigid(const EVP_PKEY *pk);
__owur const EVP_MD *tls12_get_hash(unsigned char hash_alg);
void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op);
__owur int tls1_set_sigalgs_list(CERT *c, const char *str, int client);
__owur int tls1_set_sigalgs(CERT *c, const int *salg, size_t salglen,
int client);
int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
int idx);
void tls1_set_cert_validity(SSL *s);
# ifndef OPENSSL_NO_CT
__owur int ssl_validate_ct(SSL *s);
# endif
# ifndef OPENSSL_NO_DH
__owur DH *ssl_get_auto_dh(SSL *s);
# endif
__owur int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee);
__owur int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *ex,
int vfy);
__owur EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md);
void ssl_clear_hash_ctx(EVP_MD_CTX **hash);
__owur int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p,
int *len, int maxlen);
__owur int ssl_parse_serverhello_renegotiate_ext(SSL *s, PACKET *pkt, int *al);
__owur int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p,
int *len, int maxlen);
__owur int ssl_parse_clienthello_renegotiate_ext(SSL *s, PACKET *pkt, int *al);
__owur long ssl_get_algorithm2(SSL *s);
__owur size_t tls12_copy_sigalgs(SSL *s, unsigned char *out,
const unsigned char *psig, size_t psiglen);
__owur int tls1_save_sigalgs(SSL *s, const unsigned char *data, int dsize);
__owur int tls1_process_sigalgs(SSL *s);
__owur size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs);
__owur int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s,
const unsigned char *sig, EVP_PKEY *pkey);
void ssl_set_client_disabled(SSL *s);
__owur int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op);
__owur int ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
int maxlen);
__owur int ssl_parse_clienthello_use_srtp_ext(SSL *s, PACKET *pkt, int *al);
__owur int ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
int maxlen);
__owur int ssl_parse_serverhello_use_srtp_ext(SSL *s, PACKET *pkt, int *al);
__owur int ssl_handshake_hash(SSL *s, unsigned char *out, int outlen);
__owur const EVP_MD *ssl_md(int idx);
__owur const EVP_MD *ssl_handshake_md(SSL *s);
__owur const EVP_MD *ssl_prf_md(SSL *s);
/* s3_cbc.c */
__owur char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx);
__owur int ssl3_cbc_digest_record(const EVP_MD_CTX *ctx,
unsigned char *md_out,
size_t *md_out_size,
const unsigned char header[13],
const unsigned char *data,
size_t data_plus_mac_size,
size_t data_plus_mac_plus_padding_size,
const unsigned char *mac_secret,
unsigned mac_secret_length, char is_sslv3);
__owur int tls_fips_digest_extra(const EVP_CIPHER_CTX *cipher_ctx,
EVP_MD_CTX *mac_ctx, const unsigned char *data,
size_t data_len, size_t orig_len);
__owur int srp_generate_server_master_secret(SSL *s);
__owur int srp_generate_client_master_secret(SSL *s);
__owur int srp_verify_server_param(SSL *s, int *al);
/* t1_ext.c */
void custom_ext_init(custom_ext_methods *meths);
__owur int custom_ext_parse(SSL *s, int server,
unsigned int ext_type,
const unsigned char *ext_data, size_t ext_size,
int *al);
__owur int custom_ext_add(SSL *s, int server, unsigned char **pret,
unsigned char *limit, int *al);
__owur int custom_exts_copy(custom_ext_methods *dst,
const custom_ext_methods *src);
void custom_exts_free(custom_ext_methods *exts);
void ssl_comp_free_compression_methods_int(void);
# else
# define ssl_init_wbio_buffer SSL_test_functions()->p_ssl_init_wbio_buffer
# define ssl3_setup_buffers SSL_test_functions()->p_ssl3_setup_buffers
# define dtls1_process_heartbeat SSL_test_functions()->p_dtls1_process_heartbeat
# endif
#endif
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