gloox 1.0.27
tlsgnutlsclient.cpp
1/*
2 Copyright (c) 2005-2023 by Jakob Schröter <js@camaya.net>
3 This file is part of the gloox library. http://camaya.net/gloox
4
5 This software is distributed under a license. The full license
6 agreement can be found in the file LICENSE in this distribution.
7 This software may not be copied, modified, sold or distributed
8 other than expressed in the named license agreement.
9
10 This software is distributed without any warranty.
11*/
12
13
14
15#include "tlsgnutlsclient.h"
16
17#ifdef HAVE_GNUTLS
18
19#include <errno.h>
20
21namespace gloox
22{
23
24 GnuTLSClient::GnuTLSClient( TLSHandler* th, const std::string& server )
25 : GnuTLSBase( th, server )
26 {
27 }
28
30 {
31 }
32
34 {
36 if( m_credentials )
37 gnutls_certificate_free_credentials( m_credentials );
38 init();
39 }
40
41 bool GnuTLSClient::init( const std::string& /*clientKey*/,
42 const std::string& /*clientCerts*/,
43 const StringList& /*cacerts*/ )
44 {
45 if( m_initLib && gnutls_global_init() != 0 )
46 return false;
47
48 if( gnutls_certificate_allocate_credentials( &m_credentials ) < 0 )
49 return false;
50
51 if( gnutls_init( m_session, GNUTLS_CLIENT ) != 0 )
52 {
53 gnutls_certificate_free_credentials( m_credentials );
54 return false;
55 }
56
57#if GNUTLS_VERSION_NUMBER >= 0x020600
58 int ret = gnutls_priority_set_direct( *m_session, "SECURE128:+PFS:+COMP-ALL:+VERS-TLS-ALL:-VERS-SSL3.0:+SIGN-ALL:+CURVE-ALL", 0 );
59 if( ret != GNUTLS_E_SUCCESS )
60 return false;
61#else
62 const int protocolPriority[] = {
63 GNUTLS_TLS1_3,
64 GNUTLS_TLS1_2,
65 GNUTLS_TLS1_1, GNUTLS_TLS1, 0 };
66 const int kxPriority[] = { GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_DHE_DSS, 0 };
67 const int cipherPriority[] = { GNUTLS_CIPHER_AES_256_CBC, GNUTLS_CIPHER_AES_128_CBC,
68 GNUTLS_CIPHER_3DES_CBC, GNUTLS_CIPHER_ARCFOUR, 0 };
69 const int compPriority[] = { GNUTLS_COMP_ZLIB, GNUTLS_COMP_NULL, 0 };
70 const int macPriority[] = { GNUTLS_MAC_SHA, GNUTLS_MAC_MD5, 0 };
71 gnutls_protocol_set_priority( *m_session, protocolPriority );
72 gnutls_cipher_set_priority( *m_session, cipherPriority );
73 gnutls_compression_set_priority( *m_session, compPriority );
74 gnutls_kx_set_priority( *m_session, kxPriority );
75 gnutls_mac_set_priority( *m_session, macPriority );
76#endif
77
78 gnutls_certificate_set_x509_system_trust( m_credentials );
79 gnutls_credentials_set( *m_session, GNUTLS_CRD_CERTIFICATE, m_credentials );
80
81 gnutls_transport_set_ptr( *m_session, static_cast<gnutls_transport_ptr_t>( this ) );
82 gnutls_transport_set_push_function( *m_session, pushFunc );
83 gnutls_transport_set_pull_function( *m_session, pullFunc );
84
85 m_valid = true;
86 return true;
87 }
88
89 void GnuTLSClient::setCACerts( const StringList& cacerts )
90 {
91 m_cacerts = cacerts;
92
93 StringList::const_iterator it = m_cacerts.begin();
94 for( ; it != m_cacerts.end(); ++it )
95 gnutls_certificate_set_x509_trust_file( m_credentials, (*it).c_str(), GNUTLS_X509_FMT_PEM );
96 }
97
98 void GnuTLSClient::setClientCert( const std::string& clientKey, const std::string& clientCerts )
99 {
100 m_clientKey = clientKey;
101 m_clientCerts = clientCerts;
102
103 if( !m_clientKey.empty() && !m_clientCerts.empty() )
104 {
105 gnutls_certificate_set_x509_key_file( m_credentials, m_clientCerts.c_str(),
106 m_clientKey.c_str(), GNUTLS_X509_FMT_PEM );
107 }
108 }
109
110 void GnuTLSClient::getCertInfo()
111 {
112 unsigned int status;
113 bool error = false;
114
115 gnutls_certificate_free_ca_names( m_credentials );
116
117 if( gnutls_certificate_verify_peers2( *m_session, &status ) < 0 )
118 error = true;
119
120 m_certInfo.status = 0;
121 if( status & GNUTLS_CERT_INVALID )
122 m_certInfo.status |= CertInvalid;
123 if( status & GNUTLS_CERT_SIGNER_NOT_FOUND )
124 m_certInfo.status |= CertSignerUnknown;
125 if( status & GNUTLS_CERT_REVOKED )
126 m_certInfo.status |= CertRevoked;
127 if( status & GNUTLS_CERT_SIGNER_NOT_CA )
128 m_certInfo.status |= CertSignerNotCa;
129
130 const gnutls_datum_t* certList = 0;
131 unsigned int certListSize = 0;
132 if( !error && ( ( certList = gnutls_certificate_get_peers( *m_session, &certListSize ) ) == 0 ) )
133 error = true;
134
135 unsigned int certListSizeFull = certListSize;
136
137 gnutls_x509_crt_t* cert = new gnutls_x509_crt_t[certListSize];
138 for( unsigned int i=0; !error && ( i<certListSize ); ++i )
139 {
140 if( gnutls_x509_crt_init( &cert[i] ) < 0
141 || gnutls_x509_crt_import( cert[i], &certList[i], GNUTLS_X509_FMT_DER ) < 0 )
142 error = true;
143 }
144
145 if( certListSize > 1 && ( gnutls_x509_crt_check_issuer( cert[certListSize-1], cert[certListSize-1] ) > 0 ) )
146 certListSize--;
147
148 for( unsigned int i=1; !error && ( i<certListSize ); ++i )
149 {
150 error = !verifyAgainst( cert[i-1], cert[i] );
151 if( error )
152 m_certInfo.status |= CertInvalid;
153 }
154
155 m_certInfo.chain = verifyAgainstCAs( cert[certListSize-1], 0 /*CAList*/, 0 /*CAListSize*/ );
156
157 time_t t = gnutls_x509_crt_get_activation_time( cert[0] );
158 if( t == -1 )
159 error = true;
160 else if( t > time( 0 ) )
161 m_certInfo.status |= CertNotActive;
162 m_certInfo.date_from = static_cast<int>( t );
163
164 t = gnutls_x509_crt_get_expiration_time( cert[0] );
165 if( t == -1 )
166 error = true;
167 else if( t < time( 0 ) )
168 m_certInfo.status |= CertExpired;
169 m_certInfo.date_to = static_cast<int>( t );
170
171 char name[64];
172 size_t nameSize = sizeof( name );
173 gnutls_x509_crt_get_issuer_dn( cert[0], name, &nameSize );
174 m_certInfo.issuer = name;
175
176 nameSize = sizeof( name );
177 gnutls_x509_crt_get_dn( cert[0], name, &nameSize );
178 m_certInfo.server = name;
179
180 getCommonCertInfo();
181
182 if( !gnutls_x509_crt_check_hostname( cert[0], m_server.c_str() ) )
183 m_certInfo.status |= CertWrongPeer;
184
185 for( unsigned int i = 0; i < certListSizeFull; ++i )
186 gnutls_x509_crt_deinit( cert[i] );
187
188 delete[] cert;
189
190 m_valid = true;
191 }
192
193 static bool verifyCert( gnutls_x509_crt_t cert, unsigned result )
194 {
195 return ! ( ( result & GNUTLS_CERT_INVALID )
196 || gnutls_x509_crt_get_expiration_time( cert ) < time( 0 )
197 || gnutls_x509_crt_get_activation_time( cert ) > time( 0 ) );
198 }
199
200 bool GnuTLSClient::verifyAgainst( gnutls_x509_crt_t cert, gnutls_x509_crt_t issuer )
201 {
202 unsigned int result;
203 gnutls_x509_crt_verify( cert, &issuer, 1, 0, &result );
204 return verifyCert( cert, result );
205 }
206
207 bool GnuTLSClient::verifyAgainstCAs( gnutls_x509_crt_t cert, gnutls_x509_crt_t* CAList, int CAListSize )
208 {
209 unsigned int result;
210 gnutls_x509_crt_verify( cert, CAList, CAListSize, GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT, &result );
211 return verifyCert( cert, result );
212 }
213
214}
215
216#endif // HAVE_GNUTLS
This is the common base class for (stream) encryption using GnuTLS.
Definition: tlsgnutlsbase.h:39
virtual void cleanup()
virtual void setCACerts(const StringList &cacerts)
virtual void cleanup()
virtual void setClientCert(const std::string &clientKey, const std::string &clientCerts)
virtual bool init(const std::string &clientKey=EmptyString, const std::string &clientCerts=EmptyString, const StringList &cacerts=StringList())
GnuTLSClient(TLSHandler *th, const std::string &server)
An interface that allows for interacting with TLS implementations derived from TLSBase.
Definition: tlshandler.h:35
The namespace for the gloox library.
Definition: adhoc.cpp:28
std::list< std::string > StringList
Definition: gloox.h:1251
@ CertExpired
Definition: gloox.h:979
@ CertWrongPeer
Definition: gloox.h:981
@ CertSignerUnknown
Definition: gloox.h:977
@ CertSignerNotCa
Definition: gloox.h:983
@ CertInvalid
Definition: gloox.h:976
@ CertNotActive
Definition: gloox.h:980
@ CertRevoked
Definition: gloox.h:978
bool chain
Definition: gloox.h:992
std::string server
Definition: gloox.h:994
int date_from
Definition: gloox.h:995
std::string issuer
Definition: gloox.h:993