#include "buffer.h"
#include "ssl_openssl.h"
#include "ssl_verify_openssl.h"

Include dependency graph for ssl_backend.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	tls_cipher_name_pair
	Get a tls_cipher_name_pair containing OpenSSL and IANA names for supplied TLS cipher name. More...

Macros
#define	SSLAPI SSLAPI_OPENSSL

#define	TLS_VER_BAD -1
	Parse a TLS version specifier. More...

#define	TLS_VER_UNSPEC 0 /* default */

#define	TLS_VER_1_0 1

#define	TLS_VER_1_1 2

#define	TLS_VER_1_2 3

#define	TLS_VER_1_3 4

Functions
const tls_cipher_name_pair *	tls_get_cipher_name_pair (const char *cipher_name, size_t len)

int	pem_password_callback (char buf, int size, int rwflag, void u)
	Callback to retrieve the user's password. More...

void	tls_init_lib (void)
	Perform any static initialisation necessary by the library. More...

void	tls_free_lib (void)
	Free any global SSL library-specific data structures. More...

void	tls_clear_error (void)
	Clear the underlying SSL library's error state. More...

int	tls_version_parse (const char vstr, const char extra)

int	tls_version_max (void)
	Return the maximum TLS version (as a TLS_VER_x constant) supported by current SSL implementation. More...

void	tls_ctx_server_new (struct tls_root_ctx *ctx)
	Initialise a library-specific TLS context for a server. More...

void	tls_ctx_client_new (struct tls_root_ctx *ctx)
	Initialises a library-specific TLS context for a client. More...

void	tls_ctx_free (struct tls_root_ctx *ctx)
	Frees the library-specific TLSv1 context. More...

bool	tls_ctx_initialised (struct tls_root_ctx *ctx)
	Checks whether the given TLS context is initialised. More...

bool	tls_ctx_set_options (struct tls_root_ctx *ctx, unsigned int ssl_flags)
	Set any library specific options. More...

void	tls_ctx_restrict_ciphers (struct tls_root_ctx ctx, const char ciphers)
	Restrict the list of ciphers that can be used within the TLS context for TLS 1.2 and below. More...

void	tls_ctx_restrict_ciphers_tls13 (struct tls_root_ctx ctx, const char ciphers)
	Restrict the list of ciphers that can be used within the TLS context for TLS 1.3 and higher. More...

void	tls_ctx_set_cert_profile (struct tls_root_ctx ctx, const char profile)
	Set the TLS certificate profile. More...

void	tls_ctx_check_cert_time (const struct tls_root_ctx *ctx)
	Check our certificate notBefore and notAfter fields, and warn if the cert is either not yet valid or has expired. More...

void	tls_ctx_load_dh_params (struct tls_root_ctx ctx, const char dh_file, const char *dh_file_inline)
	Load Diffie Hellman Parameters, and load them into the library-specific TLS context. More...

void	tls_ctx_load_ecdh_params (struct tls_root_ctx ctx, const char curve_name)
	Load Elliptic Curve Parameters, and load them into the library-specific TLS context. More...

int	tls_ctx_load_pkcs12 (struct tls_root_ctx ctx, const char pkcs12_file, const char *pkcs12_file_inline, bool load_ca_file)
	Load PKCS #12 file for key, cert and (optionally) CA certs, and add to library-specific TLS context. More...

void	tls_ctx_load_cert_file (struct tls_root_ctx ctx, const char cert_file, const char *cert_file_inline)
	Use Windows cryptoapi for key and cert, and add to library-specific TLS context. More...

int	tls_ctx_load_priv_file (struct tls_root_ctx ctx, const char priv_key_file, const char *priv_key_file_inline)
	Load private key file into the given TLS context. More...

int	tls_ctx_use_management_external_key (struct tls_root_ctx *ctx)
	Tell the management interface to load the given certificate and the external private key matching the given certificate. More...

void	tls_ctx_load_ca (struct tls_root_ctx ctx, const char ca_file, const char ca_file_inline, const char ca_path, bool tls_server)
	Load certificate authority certificates from the given file or path. More...

void	tls_ctx_load_extra_certs (struct tls_root_ctx ctx, const char extra_certs_file, const char *extra_certs_file_inline)
	Load extra certificate authority certificates from the given file or path. More...

void	key_state_ssl_init (struct key_state_ssl ks_ssl, const struct tls_root_ctx ssl_ctx, bool is_server, struct tls_session *session)
	Initialise the SSL channel part of the given key state. More...

void	key_state_ssl_free (struct key_state_ssl *ks_ssl)
	Free the SSL channel part of the given key state. More...

void	backend_tls_ctx_reload_crl (struct tls_root_ctx ssl_ctx, const char crl_file, const char *crl_inline)
	Reload the Certificate Revocation List for the SSL channel. More...

void	key_state_export_keying_material (struct key_state_ssl ks_ssl, struct tls_session session) __attribute__((nonnull))
	Keying Material Exporters [RFC 5705] allows additional keying material to be derived from existing TLS channel. More...

void	print_details (struct key_state_ssl ks_ssl, const char prefix)

void	show_available_tls_ciphers_list (const char cipher_list, const char tls_cert_profile, bool tls13)

void	show_available_curves (void)

void	get_highest_preference_tls_cipher (char *buf, int size)

const char *	get_ssl_library_version (void)
	return a pointer to a static memory area containing the name and version number of the SSL library in use More...

Functions for packets to be sent to a remote OpenVPN peer
int	key_state_write_plaintext (struct key_state_ssl ks_ssl, struct buffer buf)
	Insert a plaintext buffer into the TLS module. More...

int	key_state_write_plaintext_const (struct key_state_ssl ks_ssl, const uint8_t data, int len)
	Insert plaintext data into the TLS module. More...

int	key_state_read_ciphertext (struct key_state_ssl ks_ssl, struct buffer buf, int maxlen)
	Extract ciphertext data from the TLS module. More...

Functions for packets received from a remote OpenVPN peer
int	key_state_write_ciphertext (struct key_state_ssl ks_ssl, struct buffer buf)
	Insert a ciphertext buffer into the TLS module. More...

int	key_state_read_plaintext (struct key_state_ssl ks_ssl, struct buffer buf, int maxlen)
	Extract plaintext data from the TLS module. More...

Macro Definition Documentation

◆ SSLAPI

#define SSLAPI SSLAPI_OPENSSL

Definition at line 38 of file ssl_backend.h.

Referenced by plugin_open_item().

◆ TLS_VER_1_0

#define TLS_VER_1_0 1

Definition at line 114 of file ssl_backend.h.

Referenced by openssl_tls_version(), tls_version_max(), and tls_version_parse().

◆ TLS_VER_1_1

#define TLS_VER_1_1 2

Definition at line 115 of file ssl_backend.h.

Referenced by openssl_tls_version(), tls_version_max(), and tls_version_parse().

◆ TLS_VER_1_2

#define TLS_VER_1_2 3

Definition at line 116 of file ssl_backend.h.

Referenced by openssl_tls_version(), tls_version_max(), and tls_version_parse().

◆ TLS_VER_1_3

#define TLS_VER_1_3 4

Definition at line 117 of file ssl_backend.h.

Referenced by openssl_tls_version(), tls_version_max(), and tls_version_parse().

◆ TLS_VER_BAD

#define TLS_VER_BAD -1

Parse a TLS version specifier.

Parameters

vstr	The TLS version string
extra	An optional extra parameter, may be NULL

Returns: One of the TLS_VER_x constants or TLS_VER_BAD if a parse error should be flagged.

Definition at line 112 of file ssl_backend.h.

Referenced by add_option(), and tls_version_parse().

◆ TLS_VER_UNSPEC

#define TLS_VER_UNSPEC 0 /* default */

Definition at line 113 of file ssl_backend.h.

Function Documentation

◆ backend_tls_ctx_reload_crl()

void backend_tls_ctx_reload_crl	(	struct tls_root_ctx *	ssl_ctx,
		const char *	crl_file,
		const char *	crl_inline
	)

Reload the Certificate Revocation List for the SSL channel.

Parameters

ssl_ctx	The TLS context to use when reloading the CRL
crl_file	The file name to load the CRL from, or "[[INLINE]]" in the case of inline files.
crl_inline	A string containing the CRL

Definition at line 1003 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, INLINE_FILE_TAG, M_FATAL, M_WARN, msg, STACK_OF(), X509_OBJECT_free(), and X509_OBJECT_get_type().

Referenced by tls_ctx_reload_crl().

◆ get_highest_preference_tls_cipher()

void get_highest_preference_tls_cipher	(	char *	buf,
		int	size
	)

Definition at line 2114 of file ssl_openssl.c.

References crypto_msg, tls_root_ctx::ctx, M_FATAL, and strncpynt().

◆ get_ssl_library_version()

const char* get_ssl_library_version ( void )

return a pointer to a static memory area containing the name and version number of the SSL library in use

Definition at line 2139 of file ssl_openssl.c.

References OPENSSL_VERSION, and OpenSSL_version.

Referenced by push_peer_info(), and show_library_versions().

◆ key_state_export_keying_material()

void key_state_export_keying_material	(	struct key_state_ssl *	ks_ssl,
		struct tls_session *	session
	)

Keying Material Exporters [RFC 5705] allows additional keying material to be derived from existing TLS channel.

This exported keying material can then be used for a variety of purposes.

Parameters

ks_ssl	The SSL channel's state info
session	The session associated with the given key_state

Definition at line 152 of file ssl_openssl.c.

References D_TLS_DEBUG_MED, dmsg, tls_options::ekm_label, tls_options::ekm_label_size, tls_options::ekm_size, tls_options::es, format_hex_ex(), gc_free(), gc_malloc(), gc_new(), M_WARN, msg, tls_session::opt, setenv_del(), setenv_str(), and key_state_ssl::ssl.

Referenced by key_method_2_read().

◆ key_state_ssl_free()

void key_state_ssl_free ( struct key_state_ssl * ks_ssl )

Free the SSL channel part of the given key state.

Parameters

ks_ssl The SSL channel's state info to free

Definition at line 1844 of file ssl_openssl.c.

References key_state_ssl::ct_in, key_state_ssl::ct_out, key_state_ssl::ssl, and key_state_ssl::ssl_bio.

Referenced by key_state_free().

◆ key_state_ssl_init()

void key_state_ssl_init	(	struct key_state_ssl *	ks_ssl,
		const struct tls_root_ctx *	ssl_ctx,
		bool	is_server,
		struct tls_session *	session
	)

Initialise the SSL channel part of the given key state.

Settings will be loaded from a previously initialised TLS context.

Parameters

ks_ssl	The SSL channel's state info to initialise
ssl_ctx	The TLS context to use when initialising the channel.
is_server	Initialise a server?
session	The session associated with the given key_state

Definition at line 1804 of file ssl_openssl.c.

References ASSERT, CLEAR, crypto_msg, key_state_ssl::ct_in, key_state_ssl::ct_out, tls_root_ctx::ctx, M_FATAL, mydata_index, key_state_ssl::ssl, and key_state_ssl::ssl_bio.

Referenced by key_state_init().

◆ pem_password_callback()

int pem_password_callback	(	char *	buf,
		int	size,
		int	rwflag,
		void *	u
	)

Callback to retrieve the user's password.

Parameters

buf	Buffer to return the password in
size	Size of the buffer
rwflag	Unused, needed for OpenSSL compatibility
u	Unused, needed for OpenSSL compatibility

Definition at line 381 of file ssl.c.

References passbuf, user_pass::password, pem_password_setup(), purge_user_pass(), and strncpynt().

Referenced by tls_ctx_load_pkcs12(), and tls_ctx_set_options().

◆ print_details()

void print_details	(	struct key_state_ssl *	ks_ssl,
		const char *	prefix
	)

Definition at line 1943 of file ssl_openssl.c.

References D_HANDSHAKE, DSA_bits(), EC_GROUP_order_bits(), EVP_PKEY_get0_DSA(), EVP_PKEY_get0_EC_KEY(), EVP_PKEY_get0_RSA(), EVP_PKEY_id(), msg, openvpn_snprintf(), RSA_bits(), and key_state_ssl::ssl.

Referenced by tls_process().

◆ show_available_curves()

void show_available_curves ( void )

Definition at line 2078 of file ssl_openssl.c.

References ALLOC_ARRAY, crypto_msg, free, M_FATAL, M_WARN, and msg.

Referenced by print_openssl_info().

◆ show_available_tls_ciphers_list()

void show_available_tls_ciphers_list	(	const char *	cipher_list,
		const char *	tls_cert_profile,
		bool	tls13
	)

Definition at line 2003 of file ssl_openssl.c.

References crypto_msg, tls_root_ctx::ctx, tls_cipher_name_pair::iana_name, M_FATAL, SSL_CTX_set_max_proto_version(), SSL_CTX_set_min_proto_version(), STACK_OF(), tls_ctx_restrict_ciphers(), tls_ctx_restrict_ciphers_tls13(), tls_ctx_set_cert_profile(), and tls_get_cipher_name_pair().

Referenced by show_available_tls_ciphers().

◆ tls_clear_error()

void tls_clear_error ( void )

Clear the underlying SSL library's error state.

Definition at line 102 of file ssl_openssl.c.

Referenced by init_ssl(), tls_multi_process(), tls_pre_decrypt(), tls_pre_decrypt_lite(), tls_process(), tls_rec_payload(), tls_send_payload(), and verify_cert().

◆ tls_ctx_check_cert_time()

void tls_ctx_check_cert_time ( const struct tls_root_ctx * ctx )

Check our certificate notBefore and notAfter fields, and warn if the cert is either not yet valid or has expired.

Note that this is a non-fatal error, since we compare against the system time, which might be incorrect.

Parameters

ctx	TLS context to get our certificate from.

Definition at line 525 of file ssl_openssl.c.

References ASSERT, tls_root_ctx::ctx, D_TLS_DEBUG_MED, M_WARN, msg, X509_get0_notAfter, and X509_get0_notBefore.

Referenced by init_ssl().

◆ tls_ctx_client_new()

void tls_ctx_client_new ( struct tls_root_ctx * ctx )

Initialises a library-specific TLS context for a client.

Parameters

ctx	TLS context to initialise

Definition at line 121 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, and M_FATAL.

Referenced by init_ssl().

◆ tls_ctx_free()

void tls_ctx_free ( struct tls_root_ctx * ctx )

Frees the library-specific TLSv1 context.

Parameters

ctx	TLS context to free

Definition at line 134 of file ssl_openssl.c.

References ASSERT, and tls_root_ctx::ctx.

Referenced by init_ssl(), and key_schedule_free().

◆ tls_ctx_initialised()

bool tls_ctx_initialised ( struct tls_root_ctx * ctx )

Checks whether the given TLS context is initialised.

Parameters

ctx	TLS context to check

Returns: true if the context is initialised, false if not.

Definition at line 145 of file ssl_openssl.c.

References ASSERT, and tls_root_ctx::ctx.

Referenced by do_init_crypto_tls_c1(), and key_schedule_free().

◆ tls_ctx_load_ca()

void tls_ctx_load_ca	(	struct tls_root_ctx *	ctx,
		const char *	ca_file,
		const char *	ca_file_inline,
		const char *	ca_path,
		bool	tls_server
	)

Load certificate authority certificates from the given file or path.

Note that not all SSL libraries support loading from a path.

Parameters

ctx	TLS context to use
ca_file	The file name to load the CAs from, or "[[INLINE]]" in the case of inline files.
ca_file_inline	A string containing the CAs
ca_path	The path to load the CAs from

Definition at line 1424 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, INLINE_FILE_TAG, M_FATAL, M_WARN, msg, np(), sk_x509_name_cmp(), and STACK_OF().

Referenced by init_ssl().

◆ tls_ctx_load_cert_file()

void tls_ctx_load_cert_file	(	struct tls_root_ctx *	ctx,
		const char *	cert_file,
		const char *	cert_file_inline
	)

Use Windows cryptoapi for key and cert, and add to library-specific TLS context.

Parameters

ctx	TLS context to use
crypto_api_cert	String representing the certificate to load. Load certificate file into the given TLS context. If the given certificate file contains a certificate chain, load the whole chain.
ctx	TLS context to use
cert_file	The file name to load the certificate from, or "[[INLINE]]" in the case of inline files.
cert_file_inline	A string containing the certificate

Definition at line 870 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, INLINE_FILE_TAG, M_FATAL, SSL_CTX_get_default_passwd_cb(), SSL_CTX_get_default_passwd_cb_userdata(), and tls_ctx_add_extra_certs().

Referenced by init_ssl().

◆ tls_ctx_load_dh_params()

void tls_ctx_load_dh_params	(	struct tls_root_ctx *	ctx,
		const char *	dh_file,
		const char *	dh_file_inline
	)

Load Diffie Hellman Parameters, and load them into the library-specific TLS context.

Parameters

ctx	TLS context to use
dh_file	The file name to load the parameters from, or "[[INLINE]]" in the case of inline files.
dh_file_inline	A string containing the parameters

Definition at line 576 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, D_TLS_DEBUG_LOW, INLINE_FILE_TAG, M_FATAL, and msg.

Referenced by init_ssl().

◆ tls_ctx_load_ecdh_params()

void tls_ctx_load_ecdh_params	(	struct tls_root_ctx *	ctx,
		const char *	curve_name
	)

Load Elliptic Curve Parameters, and load them into the library-specific TLS context.

Parameters

ctx	TLS context to use
curve_name	The name of the elliptic curve to load.

Definition at line 620 of file ssl_openssl.c.

References crypto_msg, tls_root_ctx::ctx, D_LOW, D_TLS_DEBUG, D_TLS_DEBUG_LOW, M_FATAL, msg, and source.

Referenced by init_ssl().

◆ tls_ctx_load_extra_certs()

void tls_ctx_load_extra_certs	(	struct tls_root_ctx *	ctx,
		const char *	extra_certs_file,
		const char *	extra_certs_file_inline
	)

Load extra certificate authority certificates from the given file or path.

These Load extra certificates that are part of our own certificate chain but shouldn't be included in the verify chain.

Parameters

ctx	TLS context to use
extra_certs_file	The file name to load the certs from, or "[[INLINE]]" in the case of inline files.
extra_certs_file_inline	A string containing the certs

Definition at line 1577 of file ssl_openssl.c.

References ASSERT, crypto_msg, format_hex(), gc_free(), gc_new(), INLINE_FILE_TAG, M_FATAL, openvpn_snprintf(), ptr_format, and tls_ctx_add_extra_certs().

Referenced by init_ssl().

◆ tls_ctx_load_pkcs12()

int tls_ctx_load_pkcs12	(	struct tls_root_ctx *	ctx,
		const char *	pkcs12_file,
		const char *	pkcs12_file_inline,
		bool	load_ca_file
	)

Load PKCS #12 file for key, cert and (optionally) CA certs, and add to library-specific TLS context.

Parameters

ctx	TLS context to use
pkcs12_file	The file name to load the information from, or "[[INLINE]]" in the case of inline files.
pkcs12_file_inline	A string containing the information

Returns: 1 if an error occurred, 0 if parsing was successful.

Definition at line 706 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, INLINE_FILE_TAG, M_FATAL, management_auth_failure(), pem_password_callback(), platform_fopen(), STACK_OF(), and UP_TYPE_PRIVATE_KEY.

Referenced by init_ssl().

◆ tls_ctx_load_priv_file()

int tls_ctx_load_priv_file	(	struct tls_root_ctx *	ctx,
		const char *	priv_key_file,
		const char *	priv_key_file_inline
	)

Load private key file into the given TLS context.

Parameters

ctx	TLS context to use
priv_key_file	The file name to load the private key from, or "[[INLINE]]" in the case of inline files.
priv_key_file_inline	A string containing the private key

Returns: 1 if an error occurred, 0 if parsing was successful.

Definition at line 936 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, INLINE_FILE_TAG, M_FATAL, M_WARN, management_auth_failure(), SSL_CTX_get_default_passwd_cb(), SSL_CTX_get_default_passwd_cb_userdata(), and UP_TYPE_PRIVATE_KEY.

Referenced by init_ssl().

◆ tls_ctx_restrict_ciphers()

void tls_ctx_restrict_ciphers	(	struct tls_root_ctx *	ctx,
		const char *	ciphers
	)

Restrict the list of ciphers that can be used within the TLS context for TLS 1.2 and below.

Parameters

ctx	TLS context to restrict, must be valid.
ciphers	String containing : delimited cipher names, or NULL to use sane defaults.

Definition at line 400 of file ssl_openssl.c.

References ASSERT, convert_tls_list_to_openssl(), crypto_msg, tls_root_ctx::ctx, and M_FATAL.

Referenced by init_ssl(), and show_available_tls_ciphers_list().

◆ tls_ctx_restrict_ciphers_tls13()

void tls_ctx_restrict_ciphers_tls13	(	struct tls_root_ctx *	ctx,
		const char *	ciphers
	)

Restrict the list of ciphers that can be used within the TLS context for TLS 1.3 and higher.

Parameters

ctx	TLS context to restrict, must be valid.
ciphers	String containing : delimited cipher names, or NULL to use sane defaults.

Definition at line 462 of file ssl_openssl.c.

References ASSERT, convert_tls13_list_to_openssl(), crypto_msg, tls_root_ctx::ctx, M_FATAL, and M_WARN.

Referenced by init_ssl(), and show_available_tls_ciphers_list().

◆ tls_ctx_server_new()

void tls_ctx_server_new ( struct tls_root_ctx * ctx )

Initialise a library-specific TLS context for a server.

Parameters

ctx	TLS context to initialise

Definition at line 108 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, and M_FATAL.

Referenced by init_ssl().

◆ tls_ctx_set_cert_profile()

void tls_ctx_set_cert_profile	(	struct tls_root_ctx *	ctx,
		const char *	profile
	)

Set the TLS certificate profile.

The profile defines which crypto algorithms may be used in the supplied certificate.

Parameters

ctx	TLS context to restrict, must be valid.
profile	The profile name ('preferred', 'legacy' or 'suiteb'). Defaults to 'preferred' if NULL.

Definition at line 491 of file ssl_openssl.c.

References tls_root_ctx::ctx, M_FATAL, M_WARN, and msg.

Referenced by init_ssl(), and show_available_tls_ciphers_list().

◆ tls_ctx_set_options()

bool tls_ctx_set_options	(	struct tls_root_ctx *	ctx,
		unsigned int	ssl_flags
	)

Set any library specific options.

Examples include disabling session caching, the password callback to use, and session verification parameters.

Parameters

ctx	TLS context to set options on
ssl_flags	SSL flags to set

Returns: true on success, false otherwise.

Definition at line 284 of file ssl_openssl.c.

References ASSERT, tls_root_ctx::ctx, info_callback(), pem_password_callback(), SSLF_CLIENT_CERT_NOT_REQUIRED, SSLF_CLIENT_CERT_OPTIONAL, tls_ctx_set_tls_versions(), and verify_callback().

Referenced by init_ssl().

◆ tls_ctx_use_management_external_key()

int tls_ctx_use_management_external_key ( struct tls_root_ctx * ctx )

Tell the management interface to load the given certificate and the external private key matching the given certificate.

Parameters

ctx	TLS context to use

Returns: 1 if an error occurred, 0 if successful.

Definition at line 1347 of file ssl_openssl.c.

References ASSERT, crypto_msg, tls_root_ctx::ctx, EVP_PKEY_id(), M_FATAL, M_WARN, tls_ctx_use_external_rsa_key(), and X509_get0_pubkey().

Referenced by init_ssl().

◆ tls_free_lib()

void tls_free_lib ( void )

Free any global SSL library-specific data structures.

Definition at line 91 of file ssl_openssl.c.

Referenced by free_ssl_lib().

◆ tls_get_cipher_name_pair()

const tls_cipher_name_pair* tls_get_cipher_name_pair	(	const char *	cipher_name,
		size_t	len
	)

Definition at line 269 of file ssl.c.

References tls_cipher_name_pair::iana_name, tls_cipher_name_pair::openssl_name, and tls_cipher_name_translation_table.

Referenced by convert_tls_list_to_openssl(), and show_available_tls_ciphers_list().

◆ tls_init_lib()

void tls_init_lib ( void )

Perform any static initialisation necessary by the library.

Called on OpenVPN initialisation

Definition at line 77 of file ssl_openssl.c.

References ASSERT, and mydata_index.

Referenced by init_ssl_lib().

◆ tls_version_max()

int tls_version_max ( void )

Return the maximum TLS version (as a TLS_VER_x constant) supported by current SSL implementation.

Returns: One of the TLS_VER_x constants (but not TLS_VER_BAD).

Definition at line 215 of file ssl_openssl.c.

References TLS_VER_1_0, TLS_VER_1_1, TLS_VER_1_2, and TLS_VER_1_3.

Referenced by options_postprocess_verify_ce(), and tls_version_parse().

◆ tls_version_parse()

int tls_version_parse	(	const char *	vstr,
		const char *	extra
	)

Definition at line 516 of file ssl.c.

References TLS_VER_1_0, TLS_VER_1_1, TLS_VER_1_2, TLS_VER_1_3, TLS_VER_BAD, and tls_version_max().

Referenced by add_option().

Data Structures

Macros

Functions

Macro Definition Documentation

◆ SSLAPI

◆ TLS_VER_1_0

◆ TLS_VER_1_1

◆ TLS_VER_1_2

◆ TLS_VER_1_3

◆ TLS_VER_BAD

◆ TLS_VER_UNSPEC

Function Documentation

◆ backend_tls_ctx_reload_crl()

◆ get_highest_preference_tls_cipher()

◆ get_ssl_library_version()

◆ key_state_export_keying_material()

◆ key_state_ssl_free()

◆ key_state_ssl_init()

◆ pem_password_callback()

◆ print_details()

◆ show_available_curves()

◆ show_available_tls_ciphers_list()

◆ tls_clear_error()

◆ tls_ctx_check_cert_time()

◆ tls_ctx_client_new()

◆ tls_ctx_free()

◆ tls_ctx_initialised()

◆ tls_ctx_load_ca()

◆ tls_ctx_load_cert_file()

◆ tls_ctx_load_dh_params()

◆ tls_ctx_load_ecdh_params()

◆ tls_ctx_load_extra_certs()

◆ tls_ctx_load_pkcs12()

◆ tls_ctx_load_priv_file()

◆ tls_ctx_restrict_ciphers()

◆ tls_ctx_restrict_ciphers_tls13()

◆ tls_ctx_server_new()

◆ tls_ctx_set_cert_profile()

◆ tls_ctx_set_options()

◆ tls_ctx_use_management_external_key()

◆ tls_free_lib()

◆ tls_get_cipher_name_pair()

◆ tls_init_lib()

◆ tls_version_max()

◆ tls_version_parse()