Botan 2.19.1
Crypto and TLS for C&
Public Member Functions | Static Public Member Functions | List of all members
Botan::TLS::Server_Name_Indicator Class Referencefinal

#include <tls_extensions.h>

Inheritance diagram for Botan::TLS::Server_Name_Indicator:
Botan::TLS::Extension

Public Member Functions

bool empty () const override
 
std::string host_name () const
 
std::vector< uint8_t > serialize (Connection_Side whoami) const override
 
 Server_Name_Indicator (const std::string &host_name)
 
 Server_Name_Indicator (TLS_Data_Reader &reader, uint16_t extension_size)
 
Handshake_Extension_Type type () const override
 

Static Public Member Functions

static Handshake_Extension_Type static_type ()
 

Detailed Description

Server Name Indicator extension (RFC 3546)

Definition at line 81 of file tls_extensions.h.

Constructor & Destructor Documentation

◆ Server_Name_Indicator() [1/2]

Botan::TLS::Server_Name_Indicator::Server_Name_Indicator ( const std::string &  host_name)
inlineexplicit

Definition at line 89 of file tls_extensions.h.

89 :
90 m_sni_host_name(host_name) {}

◆ Server_Name_Indicator() [2/2]

Botan::TLS::Server_Name_Indicator::Server_Name_Indicator ( TLS_Data_Reader reader,
uint16_t  extension_size 
)

Definition at line 164 of file tls_extensions.cpp.

166 {
167 /*
168 * This is used by the server to confirm that it knew the name
169 */
170 if(extension_size == 0)
171 return;
172
173 uint16_t name_bytes = reader.get_uint16_t();
174
175 if(name_bytes + 2 != extension_size)
176 throw Decoding_Error("Bad encoding of SNI extension");
177
178 while(name_bytes)
179 {
180 uint8_t name_type = reader.get_byte();
181 name_bytes--;
182
183 if(name_type == 0) // DNS
184 {
185 m_sni_host_name = reader.get_string(2, 1, 65535);
186 name_bytes -= static_cast<uint16_t>(2 + m_sni_host_name.size());
187 }
188 else // some other unknown name type
189 {
190 reader.discard_next(name_bytes);
191 name_bytes = 0;
192 }
193 }
194 }

References Botan::TLS::TLS_Data_Reader::discard_next(), Botan::TLS::TLS_Data_Reader::get_byte(), Botan::TLS::TLS_Data_Reader::get_string(), and Botan::TLS::TLS_Data_Reader::get_uint16_t().

Member Function Documentation

◆ empty()

bool Botan::TLS::Server_Name_Indicator::empty ( ) const
inlineoverridevirtual
Returns
if we should encode this extension or not

Implements Botan::TLS::Extension.

Definition at line 99 of file tls_extensions.h.

99{ return m_sni_host_name.empty(); }

◆ host_name()

std::string Botan::TLS::Server_Name_Indicator::host_name ( ) const
inline

Definition at line 95 of file tls_extensions.h.

95{ return m_sni_host_name; }

◆ serialize()

std::vector< uint8_t > Botan::TLS::Server_Name_Indicator::serialize ( Connection_Side  whoami) const
overridevirtual
Returns
serialized binary for the extension

Implements Botan::TLS::Extension.

Definition at line 196 of file tls_extensions.cpp.

197 {
198 std::vector<uint8_t> buf;
199
200 size_t name_len = m_sni_host_name.size();
201
202 buf.push_back(get_byte(0, static_cast<uint16_t>(name_len+3)));
203 buf.push_back(get_byte(1, static_cast<uint16_t>(name_len+3)));
204 buf.push_back(0); // DNS
205
206 buf.push_back(get_byte(0, static_cast<uint16_t>(name_len)));
207 buf.push_back(get_byte(1, static_cast<uint16_t>(name_len)));
208
209 buf += std::make_pair(
210 cast_char_ptr_to_uint8(m_sni_host_name.data()),
211 m_sni_host_name.size());
212
213 return buf;
214 }
constexpr uint8_t get_byte(size_t byte_num, T input)
Definition: loadstor.h:41
const uint8_t * cast_char_ptr_to_uint8(const char *s)
Definition: mem_ops.h:190

References Botan::cast_char_ptr_to_uint8(), and Botan::get_byte().

◆ static_type()

static Handshake_Extension_Type Botan::TLS::Server_Name_Indicator::static_type ( )
inlinestatic

Definition at line 84 of file tls_extensions.h.

@ TLSEXT_SERVER_NAME_INDICATION

References Botan::TLS::TLSEXT_SERVER_NAME_INDICATION.

◆ type()

Handshake_Extension_Type Botan::TLS::Server_Name_Indicator::type ( ) const
inlineoverridevirtual
Returns
code number of the extension

Implements Botan::TLS::Extension.

Definition at line 87 of file tls_extensions.h.

87{ return static_type(); }
static Handshake_Extension_Type static_type()

The documentation for this class was generated from the following files: