OpenVPN
Data Structures | Functions
ssl_util.h File Reference
#include "buffer.h"
Include dependency graph for ssl_util.h:
This graph shows which files directly or indirectly include this file:

Go to the source code of 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...
 

Functions

char * extract_var_peer_info (const char *peer_info, const char *var, struct gc_arena *gc)
 Extracts a variable from peer info, the returned string will be allocated using the supplied gc_arena. More...
 
unsigned int extract_iv_proto (const char *peer_info)
 Extracts the IV_PROTO variable and returns its value or 0 if it cannot be extracted. More...
 
const char * options_string_compat_lzo (const char *options, struct gc_arena *gc)
 Takes a locally produced OCC string for TLS server mode and modifies as if the option comp-lzo was enabled. More...
 
const tls_cipher_name_pairtls_get_cipher_name_pair (const char *cipher_name, size_t len)
 
int get_num_elements (const char *string, char delimiter)
 Returns the occurrences of 'delimiter' in a string +1 This is typically used to find out the number elements in a cipher string or similar that is separated by : like. More...
 

Function Documentation

◆ extract_iv_proto()

unsigned int extract_iv_proto ( const char *  peer_info)

Extracts the IV_PROTO variable and returns its value or 0 if it cannot be extracted.

Parameters
peer_infopeer info string to search for IV_PROTO

Definition at line 62 of file ssl_util.c.

Referenced by multi_client_set_protocol_options(), p2p_ncp_set_options(), and send_auth_pending_messages().

◆ extract_var_peer_info()

char* extract_var_peer_info ( const char *  peer_info,
const char *  var,
struct gc_arena gc 
)

Extracts a variable from peer info, the returned string will be allocated using the supplied gc_arena.

Parameters
peer_infoThe peer's peer_info
varThe variable including =, e.g. IV_CIPHERS=
Returns
The content of the variable as NULL terminated string or NULL if the variable cannot be found.

Definition at line 32 of file ssl_util.c.

References string_alloc().

Referenced by check_auth_pending_method(), get_p2p_ncp_cipher(), prepare_push_reply(), and tls_peer_ncp_list().

◆ get_num_elements()

int get_num_elements ( const char *  string,
char  delimiter 
)

Returns the occurrences of 'delimiter' in a string +1 This is typically used to find out the number elements in a cipher string or similar that is separated by : like.

X25519:secp256r1:X448:secp512r1:secp384r1:brainpoolP384r1

Parameters
stringthe string to work on
delimiterthe delimiter to count, typically ':'
Returns
occrrences of delimiter + 1

Definition at line 284 of file ssl_util.c.

References ASSERT.

Referenced by tls_ctx_set_tls_groups().

◆ options_string_compat_lzo()

const char* options_string_compat_lzo ( const char *  options,
struct gc_arena gc 
)

Takes a locally produced OCC string for TLS server mode and modifies as if the option comp-lzo was enabled.

This is to send a client in comp-lzo migrate mode the expected OCC string.

Note: This function expects the string to be in the locally generated format and does not accept arbitrary strings.

Parameters
optionsthe locally generated OCC string
gcgc_arena to allocate the returned string in
Returns
the modified string or options on error

Definition at line 78 of file ssl_util.c.

References alloc_buf_gc(), BSTR, buf_printf(), and buf_write().

Referenced by key_method_2_read(), and test_compat_lzo_string().

◆ tls_get_cipher_name_pair()

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