/*
   Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING. If not, write to the
   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
   MA  02110-1301  USA.
 */

/*  ssl.h defines openssl compatibility layer 
 *
 */



#ifndef yaSSL_openssl_h__
#define yaSSL_openssl_h__

#ifdef YASSL_PREFIX
#include "prefix_ssl.h"
#endif

#include <stdio.h>    /* ERR_print fp */
#include "opensslv.h" /* for version number */
#include "rsa.h"


#define YASSL_VERSION "2.4.4"


#if defined(__cplusplus)
extern "C" {
#endif

 void yaSSL_CleanUp();   /* call once at end of application use to
                            free static singleton memory holders,
                            not a leak per se, but helpful when
                            looking for them                      */

#if defined(__cplusplus)
} // extern
#endif

#if defined(__cplusplus) && !defined(YASSL_MYSQL_COMPATIBLE)
namespace yaSSL {
extern "C" {
#endif

#undef X509_NAME   /* wincrypt.h clash */

#if defined(__cplusplus) && !defined(YASSL_MYSQL_COMPATIBLE)
    class SSL;
    class SSL_SESSION;
    class SSL_METHOD;
    class SSL_CTX;
    class SSL_CIPHER;

    class RSA;

    class X509;
    class X509_NAME;
#else
    typedef struct SSL          SSL;          
    typedef struct SSL_SESSION  SSL_SESSION;
    typedef struct SSL_METHOD   SSL_METHOD;
    typedef struct SSL_CTX      SSL_CTX;
    typedef struct SSL_CIPHER   SSL_CIPHER;

    typedef struct RSA RSA;

    typedef struct X509       X509;
    typedef struct X509_NAME  X509_NAME;
#endif


/* Big Number stuff, different file? */
typedef struct BIGNUM BIGNUM;

BIGNUM *BN_bin2bn(const unsigned char*, int, BIGNUM*);


/* Diffie-Hellman stuff, different file? */
/* mySQL deferences to set group parameters */
typedef struct DH {
    BIGNUM* p;
    BIGNUM* g;
} DH;

DH*  DH_new(void);
void DH_free(DH*);

/* RSA stuff */

void RSA_free(RSA*);
RSA* RSA_generate_key(int, unsigned long, void(*)(int, int, void*), void*);


/* X509 stuff, different file? */

/* because mySQL dereferences to use error and current_cert, even after calling
 * get functions for local references */
typedef struct X509_STORE_CTX {
    int   error;
    int   error_depth;
    X509* current_cert;
} X509_STORE_CTX;


typedef struct X509_STORE         X509_STORE;
typedef struct X509_LOOKUP        X509_LOOKUP;
typedef struct X509_OBJECT { char c; } X509_OBJECT;
typedef struct X509_CRL           X509_CRL;
typedef struct X509_REVOKED       X509_REVOKED;
typedef struct X509_LOOKUP_METHOD X509_LOOKUP_METHOD;


void X509_free(X509*);


/* bio stuff */
typedef struct BIO BIO;

/* ASN stuff */



X509* X509_STORE_CTX_get_current_cert(X509_STORE_CTX*);
int   X509_STORE_CTX_get_error(X509_STORE_CTX*);
int   X509_STORE_CTX_get_error_depth(X509_STORE_CTX*);

char*       X509_NAME_oneline(X509_NAME*, char*, int);
X509_NAME*  X509_get_issuer_name(X509*);
X509_NAME*  X509_get_subject_name(X509*);
const char* X509_verify_cert_error_string(long);

int                 X509_LOOKUP_add_dir(X509_LOOKUP*, const char*, long);
int                 X509_LOOKUP_load_file(X509_LOOKUP*, const char*, long);
X509_LOOKUP_METHOD* X509_LOOKUP_hash_dir(void);
X509_LOOKUP_METHOD* X509_LOOKUP_file(void);

X509_LOOKUP* X509_STORE_add_lookup(X509_STORE*, X509_LOOKUP_METHOD*);
X509_STORE*  X509_STORE_new(void);
int          X509_STORE_get_by_subject(X509_STORE_CTX*, int, X509_NAME*,
                                       X509_OBJECT*);




enum { /* X509 Constants */
    X509_V_OK                                 =  0,
    X509_V_ERR_CERT_CHAIN_TOO_LONG            =  1,
    X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT      =  2,
    X509_V_ERR_CERT_NOT_YET_VALID             =  3,
    X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD =  4,
    X509_V_ERR_CERT_HAS_EXPIRED               =  5,
    X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD  =  6,
    X509_FILETYPE_PEM                         =  7,
    X509_LU_X509                              =  8,
    X509_LU_CRL                               =  9,
    X509_V_ERR_CRL_SIGNATURE_FAILURE          = 10,
    X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD = 11,
    X509_V_ERR_CRL_HAS_EXPIRED                = 12,
    X509_V_ERR_CERT_REVOKED                   = 13,
    X509_V_FLAG_CRL_CHECK                     = 14,
    X509_V_FLAG_CRL_CHECK_ALL                 = 15
};


/* Error stuff, could move to yassl_error */
unsigned long ERR_get_error_line_data(const char**, int*, const char**, int *);
void          ERR_print_errors_fp(FILE*);
char*         ERR_error_string(unsigned long,char*);
void          ERR_remove_thread_state(const void *);
unsigned long ERR_get_error(void);
unsigned long ERR_peek_error(void);
int           ERR_GET_REASON(int);


enum {  /* ERR Constants */
    ERR_TXT_STRING = 1,
    EVP_R_BAD_DECRYPT = 2
};

/*
  Allow type used by SSL_set_fd to be changed, default to int
  in order to be compatible with OpenSSL
 */
#ifndef YASSL_SOCKET_T_DEFINED
typedef int YASSL_SOCKET_T;
#endif

SSL_CTX* SSL_CTX_new(SSL_METHOD*);
SSL* SSL_new(SSL_CTX*);
int  SSL_set_fd (SSL*, YASSL_SOCKET_T);
YASSL_SOCKET_T SSL_get_fd(const SSL*);
int  SSL_connect(SSL*);                    /* if you get an error from connect
                                              see note at top of README       */
int  SSL_write(SSL*, const void*, int);
int  SSL_read(SSL*, void*, int);
int  SSL_accept(SSL*);
void SSL_CTX_free(SSL_CTX*);
void SSL_free(SSL*);
int  SSL_clear(SSL*);
int  SSL_shutdown(SSL*);

void SSL_set_connect_state(SSL*);
void SSL_set_accept_state(SSL*);
int  SSL_do_handshake(SSL*);

const char* SSL_get_cipher(SSL*);
const char* SSL_get_cipher_name(SSL*);	           /* uses SSL_get_cipher */
char*       SSL_get_shared_ciphers(SSL*, char*, int);
const char* SSL_get_cipher_list(SSL*, int);
const char* SSL_get_version(SSL*);
const char* SSLeay_version(int);

int  SSL_get_error(SSL*, int);
void SSL_load_error_strings(void);

int          SSL_set_session(SSL *ssl, SSL_SESSION *session);
SSL_SESSION* SSL_get_session(SSL* ssl);
void         SSL_flush_sessions(SSL_CTX *ctx, long tm);
long         SSL_SESSION_set_timeout(SSL_SESSION*, long);
long         SSL_CTX_set_session_cache_mode(SSL_CTX* ctx, long mode);
X509*        SSL_get_peer_certificate(SSL*);
long         SSL_get_verify_result(SSL*);


typedef int (*VerifyCallback)(int, X509_STORE_CTX*);
typedef int (*pem_password_cb)(char*, int, int, void*);
int default_password_callback(char * buffer, int size_arg, int rwflag,
                              void * u);

void SSL_CTX_set_verify(SSL_CTX*, int, VerifyCallback verify_callback);
int  SSL_CTX_load_verify_locations(SSL_CTX*, const char*, const char*);
int  SSL_CTX_set_default_verify_paths(SSL_CTX*);
int  SSL_CTX_check_private_key(SSL_CTX*);
int  SSL_CTX_set_session_id_context(SSL_CTX*, const unsigned char*,
                                    unsigned int);

void SSL_CTX_set_tmp_rsa_callback(SSL_CTX*, RSA*(*)(SSL*, int, int));
long SSL_CTX_set_options(SSL_CTX*, long);
long SSL_CTX_set_session_cache_mode(SSL_CTX*, long);
long SSL_CTX_set_timeout(SSL_CTX*, long);
int  SSL_CTX_use_certificate_chain_file(SSL_CTX*, const char*);
void SSL_CTX_set_default_passwd_cb(SSL_CTX*, pem_password_cb);
int  SSL_CTX_use_RSAPrivateKey_file(SSL_CTX*, const char*, int);
void SSL_CTX_set_info_callback(SSL_CTX*, void (*)());

long SSL_CTX_sess_accept(SSL_CTX*);
long SSL_CTX_sess_connect(SSL_CTX*);
long SSL_CTX_sess_accept_good(SSL_CTX*);
long SSL_CTX_sess_connect_good(SSL_CTX*);
long SSL_CTX_sess_accept_renegotiate(SSL_CTX*);
long SSL_CTX_sess_connect_renegotiate(SSL_CTX*);
long SSL_CTX_sess_hits(SSL_CTX*);
long SSL_CTX_sess_cb_hits(SSL_CTX*);
long SSL_CTX_sess_cache_full(SSL_CTX*);
long SSL_CTX_sess_misses(SSL_CTX*);
long SSL_CTX_sess_timeouts(SSL_CTX*);
long SSL_CTX_sess_number(SSL_CTX*);
long SSL_CTX_sess_get_cache_size(SSL_CTX*);

int SSL_CTX_get_verify_mode(SSL_CTX*);
int SSL_get_verify_mode(SSL*);
int SSL_CTX_get_verify_depth(SSL_CTX*);
int SSL_get_verify_depth(SSL*);

long SSL_get_default_timeout(SSL*);
long SSL_CTX_get_session_cache_mode(SSL_CTX*);
int  SSL_session_reused(SSL*);

int  SSL_set_rfd(SSL*, int);
int  SSL_set_wfd(SSL*, int);
void SSL_set_shutdown(SSL*, int);
void SSL_set_quiet_shutdown(SSL *ssl,int mode);
int SSL_get_quiet_shutdown(SSL *ssl);

int SSL_want_read(SSL*);
int SSL_want_write(SSL*);

int SSL_pending(SSL*);


enum { /* ssl Constants */
    SSL_WOULD_BLOCK     = -8,
    SSL_BAD_STAT        = -7,
    SSL_BAD_PATH        = -6,
    SSL_BAD_FILETYPE    = -5,
    SSL_BAD_FILE        = -4,
    SSL_NOT_IMPLEMENTED = -3,
    SSL_UNKNOWN         = -2,
    SSL_FATAL_ERROR     = -1,
    SSL_NORMAL_SHUTDOWN =  0,
    SSL_ERROR_NONE      =  0,   /* for most functions */
    SSL_FAILURE         =  0,   /* for some functions */
    SSL_SUCCESS	        =  1,

    SSL_FILETYPE_ASN1    = 10,
    SSL_FILETYPE_PEM     = 11,
    SSL_FILETYPE_DEFAULT = 10, /* ASN1 */

    SSL_VERIFY_NONE                 = 0,
    SSL_VERIFY_PEER                 = 1,
    SSL_VERIFY_FAIL_IF_NO_PEER_CERT = 2,
    SSL_VERIFY_CLIENT_ONCE          = 4,

    SSL_SESS_CACHE_OFF                = 30,
    SSL_SESS_CACHE_CLIENT             = 31,
    SSL_SESS_CACHE_SERVER             = 32,
    SSL_SESS_CACHE_BOTH               = 33,
    SSL_SESS_CACHE_NO_AUTO_CLEAR      = 34,
    SSL_SESS_CACHE_NO_INTERNAL_LOOKUP = 35,

    SSL_OP_MICROSOFT_SESS_ID_BUG            = 50,
    SSL_OP_NETSCAPE_CHALLENGE_BUG           = 51,
    SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG = 52,
    SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG      = 53,
    SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER       = 54,
    SSL_OP_MSIE_SSLV2_RSA_PADDING           = 55,
    SSL_OP_SSLEAY_080_CLIENT_DH_BUG         = 56,
    SSL_OP_TLS_D5_BUG                       = 57,
    SSL_OP_TLS_BLOCK_PADDING_BUG            = 58,
    SSL_OP_TLS_ROLLBACK_BUG                 = 59,
    SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS      = 60,
    SSL_OP_ALL                              = 61,
    SSL_OP_SINGLE_DH_USE                    = 62,
    SSL_OP_EPHEMERAL_RSA                    = 63,
    SSL_OP_PKCS1_CHECK_1                    = 67,
    SSL_OP_PKCS1_CHECK_2                    = 68,
    SSL_OP_NETSCAPE_CA_DN_BUG               = 69,
    SSL_OP_NON_EXPORT_FIRST                 = 70,
    SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG  = 71,

    SSL_ERROR_WANT_READ        = 80,
    SSL_ERROR_WANT_WRITE       = 81,
    SSL_ERROR_SYSCALL          = 82,
    SSL_ERROR_WANT_X509_LOOKUP = 83,
    SSL_ERROR_ZERO_RETURN      = 84,
    SSL_ERROR_SSL              = 85,

    SSL_ST_CONNECT        = 90,
    SSL_ST_ACCEPT         = 91,
    SSL_CB_LOOP           = 92,
    SSL_SENT_SHUTDOWN     = 93,
    SSL_RECEIVED_SHUTDOWN = 94,
    SSL_CB_ALERT          = 95,
    SSL_CB_READ           = 96,
    SSL_CB_HANDSHAKE_DONE = 97,

    SSL_OP_NO_SSLv2                         = 128,
    SSL_OP_NO_SSLv3                         = 256,
    SSL_OP_NO_TLSv1                         = 512,
    SSL_OP_NO_TLSv1_1                       = 1024,
};


SSL_METHOD *SSLv3_method(void);
SSL_METHOD *SSLv3_server_method(void);
SSL_METHOD *SSLv3_client_method(void);
SSL_METHOD *TLSv1_server_method(void);
SSL_METHOD *TLSv1_client_method(void);
SSL_METHOD *TLSv1_1_server_method(void);
SSL_METHOD *TLSv1_1_client_method(void);
SSL_METHOD *SSLv23_server_method(void);

int SSL_CTX_use_certificate_file(SSL_CTX*, const char*, int);
int SSL_CTX_use_PrivateKey_file(SSL_CTX*, const char*, int);
int SSL_CTX_set_cipher_list(SSL_CTX*, const char*);

long SSL_CTX_sess_set_cache_size(SSL_CTX*, long);
long SSL_CTX_set_tmp_dh(SSL_CTX*, DH*);

void OpenSSL_add_all_algorithms(void);
int  SSL_library_init();
int  SSLeay_add_ssl_algorithms(void);


SSL_CIPHER* SSL_get_current_cipher(SSL*);
char*       SSL_CIPHER_description(SSL_CIPHER*, char*, int);


char* SSL_alert_type_string_long(int);
char* SSL_alert_desc_string_long(int);
char* SSL_state_string_long(SSL*);

X509* PEM_read_X509(FILE *fp, X509 *x, pem_password_cb cb, void *u);
/* EVP stuff, des and md5, different file? */
typedef char EVP_MD;

typedef char EVP_CIPHER;

typedef struct EVP_PKEY EVP_PKEY;

typedef unsigned char DES_cblock[8];
typedef const  DES_cblock const_DES_cblock;
typedef DES_cblock DES_key_schedule;
                                                          
enum {
    DES_ENCRYPT = 1,
    DES_DECRYPT = 0
};
                                                             
const EVP_MD*     EVP_md5(void);
const EVP_CIPHER* EVP_des_ede3_cbc(void);

typedef unsigned char opaque;

int EVP_BytesToKey(const EVP_CIPHER*, const EVP_MD*, const opaque*,
                   const opaque*, int, int, opaque*, opaque*);

void DES_set_key_unchecked(const_DES_cblock*, DES_key_schedule*);
void DES_ede3_cbc_encrypt(const opaque*, opaque*, long, DES_key_schedule*,
                        DES_key_schedule*, DES_key_schedule*, DES_cblock*, int);


/* RAND stuff */
void        RAND_screen(void);
const char* RAND_file_name(char*, size_t);
int         RAND_write_file(const char*);
int         RAND_load_file(const char*, long);


/* for libcurl */
int  RAND_status(void);
int  RAND_bytes(unsigned char* buf, int num);

int  DES_set_key(const_DES_cblock*, DES_key_schedule*);
void DES_set_odd_parity(DES_cblock*);
void DES_ecb_encrypt(DES_cblock*, DES_cblock*, DES_key_schedule*, int);

void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX*, void* userdata);
void SSL_SESSION_free(SSL_SESSION* session);
int  SSL_peek(SSL* ssl, void* buf, int num);

X509*     SSL_get_certificate(SSL* ssl);
EVP_PKEY* SSL_get_privatekey(SSL* ssl);
EVP_PKEY* X509_get_pubkey(X509* x);

int  EVP_PKEY_copy_parameters(EVP_PKEY* to, const EVP_PKEY* from);
void EVP_PKEY_free(EVP_PKEY* pkey);
void ERR_error_string_n(unsigned long e, char *buf, size_t len);
void ERR_free_strings(void);
void EVP_cleanup(void);

void* X509_get_ext_d2i(X509* x, int nid, int* crit, int* idx);

#define GEN_IPADD 7
#define NID_subject_alt_name 85
#define STACK_OF(x) x


/* defined here because libcurl dereferences */
typedef struct ASN1_STRING {
    int type;
    int length;
    unsigned char* data;
} ASN1_STRING;


typedef struct GENERAL_NAME {
    int type;
    union {
        ASN1_STRING* ia5;
    } d;
} GENERAL_NAME;

void GENERAL_NAMES_free(STACK_OF(GENERAL_NAME) *x);

int           sk_GENERAL_NAME_num(STACK_OF(GENERAL_NAME) *x);
GENERAL_NAME* sk_GENERAL_NAME_value(STACK_OF(GENERAL_NAME) *x, int i);


unsigned char* ASN1_STRING_data(ASN1_STRING* x);
int            ASN1_STRING_length(ASN1_STRING* x);
int            ASN1_STRING_type(ASN1_STRING *x);

typedef ASN1_STRING X509_NAME_ENTRY;

int X509_NAME_get_index_by_NID(X509_NAME* name,int nid, int lastpos);

ASN1_STRING* X509_NAME_ENTRY_get_data(X509_NAME_ENTRY* ne);
X509_NAME_ENTRY* X509_NAME_get_entry(X509_NAME* name, int loc);

#define OPENSSL_malloc(x) malloc(x)
#define OPENSSL_free(x)   free(x)

int ASN1_STRING_to_UTF8(unsigned char** out, ASN1_STRING* in);

SSL_METHOD* SSLv23_client_method(void);  /* doesn't actually roll back */
SSL_METHOD* SSLv2_client_method(void);   /* will never work, no v 2    */


SSL_SESSION* SSL_get1_session(SSL* ssl);  /* what's ref count */


#define CRYPTO_free(x) free(x)
#define ASN1_TIME ASN1_STRING

ASN1_TIME* X509_get_notBefore(X509* x);
ASN1_TIME* X509_get_notAfter(X509* x);


#define ASN1_UTCTIME ASN1_STRING
#define NID_commonName    13
#define V_ASN1_UTF8STRING 12
#define GEN_DNS            2

#define CERTFICATE_ERROR 0x14090086  /* SSLv3 error */


typedef struct MD4_CTX {
    int buffer[32];      /* big enough to hold, check size in Init */
} MD4_CTX;

void MD4_Init(MD4_CTX*);
void MD4_Update(MD4_CTX*, const void*, unsigned long);
void MD4_Final(unsigned char*, MD4_CTX*);


typedef struct MD5_CTX {
    int buffer[32];       /* big enough to hold, check size in Init */
} MD5_CTX;

void MD5_Init(MD5_CTX*);
void MD5_Update(MD5_CTX*, const void*, unsigned long);
void MD5_Final(unsigned char*, MD5_CTX*);

#define MD5_DIGEST_LENGTH 16


#define SSL_DEFAULT_CIPHER_LIST ""   /* default all */


/* yaSSL extensions */
int SSL_set_compression(SSL*);   /* turn on yaSSL zlib compression */
char *yaSSL_ASN1_TIME_to_string(ASN1_TIME *time, char *buf, size_t len);

#include "transport_types.h"

/*
  Set functions for yaSSL to use in order to send and receive data.

  These hooks are offered in order to enable non-blocking I/O. If
  not set, yaSSL defaults to using send() and recv().

  @todo Remove hooks and accompanying code when yaSSL is fixed.
*/
void yaSSL_transport_set_ptr(SSL *, void *);
void yaSSL_transport_set_recv_function(SSL *, yaSSL_recv_func_t);
void yaSSL_transport_set_send_function(SSL *, yaSSL_send_func_t);

#if defined(__cplusplus) && !defined(YASSL_MYSQL_COMPATIBLE)
}      /* namespace  */
}      /* extern "C" */
#endif


#endif /* yaSSL_openssl_h__ */
