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71.\" 72.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). 73.\" Fear. Run. Save yourself. No user-serviceable parts. 74. \" fudge factors for nroff and troff 75.if n \{\ 76. ds #H 0 77. ds #V .8m 78. ds #F .3m 79. ds #[ \f1 80. ds #] \fP 81.\} 82.if t \{\ 83. ds #H ((1u-(\\\\n(.fu%2u))*.13m) 84. ds #V .6m 85. ds #F 0 86. ds #[ \& 87. ds #] \& 88.\} 89. \" simple accents for nroff and troff 90.if n \{\ 91. ds ' \& 92. ds ` \& 93. ds ^ \& 94. ds , \& 95. ds ~ ~ 96. ds / 97.\} 98.if t \{\ 99. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" 100. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' 101. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' 102. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' 103. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' 104. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' 105.\} 106. \" troff and (daisy-wheel) nroff accents 107.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' 108.ds 8 \h'\*(#H'\(*b\h'-\*(#H' 109.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] 110.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' 111.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' 112.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] 113.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] 114.ds ae a\h'-(\w'a'u*4/10)'e 115.ds Ae A\h'-(\w'A'u*4/10)'E 116. \" corrections for vroff 117.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' 118.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' 119. \" for low resolution devices (crt and lpr) 120.if \n(.H>23 .if \n(.V>19 \ 121\{\ 122. ds : e 123. ds 8 ss 124. ds o a 125. ds d- d\h'-1'\(ga 126. ds D- D\h'-1'\(hy 127. ds th \o'bp' 128. ds Th \o'LP' 129. ds ae ae 130. ds Ae AE 131.\} 132.rm #[ #] #H #V #F C 133.\" ======================================================================== 134.\" 135.IX Title "S_SERVER 1"
| 62.\" 63.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). 64.\" Fear. Run. Save yourself. No user-serviceable parts. 65. \" fudge factors for nroff and troff 66.if n \{\ 67. ds #H 0 68. ds #V .8m 69. ds #F .3m 70. ds #[ \f1 71. ds #] \fP 72.\} 73.if t \{\ 74. ds #H ((1u-(\\\\n(.fu%2u))*.13m) 75. ds #V .6m 76. ds #F 0 77. ds #[ \& 78. ds #] \& 79.\} 80. \" simple accents for nroff and troff 81.if n \{\ 82. ds ' \& 83. ds ` \& 84. ds ^ \& 85. ds , \& 86. ds ~ ~ 87. ds / 88.\} 89.if t \{\ 90. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" 91. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' 92. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' 93. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' 94. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' 95. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' 96.\} 97. \" troff and (daisy-wheel) nroff accents 98.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' 99.ds 8 \h'\*(#H'\(*b\h'-\*(#H' 100.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] 101.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' 102.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' 103.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] 104.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] 105.ds ae a\h'-(\w'a'u*4/10)'e 106.ds Ae A\h'-(\w'A'u*4/10)'E 107. \" corrections for vroff 108.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' 109.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' 110. \" for low resolution devices (crt and lpr) 111.if \n(.H>23 .if \n(.V>19 \ 112\{\ 113. ds : e 114. ds 8 ss 115. ds o a 116. ds d- d\h'-1'\(ga 117. ds D- D\h'-1'\(hy 118. ds th \o'bp' 119. ds Th \o'LP' 120. ds ae ae 121. ds Ae AE 122.\} 123.rm #[ #] #H #V #F C 124.\" ======================================================================== 125.\" 126.IX Title "S_SERVER 1"
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136.TH S_SERVER 1 "2015-01-15" "1.0.1l" "OpenSSL"
| 127.TH S_SERVER 1 "2014-10-15" "1.0.1j" "OpenSSL"
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137.\" For nroff, turn off justification. Always turn off hyphenation; it makes 138.\" way too many mistakes in technical documents. 139.if n .ad l 140.nh 141.SH "NAME" 142s_server \- SSL/TLS server program 143.SH "SYNOPSIS" 144.IX Header "SYNOPSIS" 145\&\fBopenssl\fR \fBs_server\fR 146[\fB\-accept port\fR] 147[\fB\-context id\fR] 148[\fB\-verify depth\fR] 149[\fB\-Verify depth\fR] 150[\fB\-crl_check\fR] 151[\fB\-crl_check_all\fR] 152[\fB\-cert filename\fR] 153[\fB\-certform DER|PEM\fR] 154[\fB\-key keyfile\fR] 155[\fB\-keyform DER|PEM\fR] 156[\fB\-pass arg\fR] 157[\fB\-dcert filename\fR] 158[\fB\-dcertform DER|PEM\fR] 159[\fB\-dkey keyfile\fR] 160[\fB\-dkeyform DER|PEM\fR] 161[\fB\-dpass arg\fR] 162[\fB\-dhparam filename\fR] 163[\fB\-nbio\fR] 164[\fB\-nbio_test\fR] 165[\fB\-crlf\fR] 166[\fB\-debug\fR] 167[\fB\-msg\fR] 168[\fB\-state\fR] 169[\fB\-CApath directory\fR] 170[\fB\-CAfile filename\fR] 171[\fB\-nocert\fR] 172[\fB\-cipher cipherlist\fR] 173[\fB\-serverpref\fR] 174[\fB\-quiet\fR] 175[\fB\-no_tmp_rsa\fR] 176[\fB\-ssl2\fR] 177[\fB\-ssl3\fR] 178[\fB\-tls1\fR] 179[\fB\-no_ssl2\fR] 180[\fB\-no_ssl3\fR] 181[\fB\-no_tls1\fR] 182[\fB\-no_dhe\fR] 183[\fB\-no_ecdhe\fR] 184[\fB\-bugs\fR] 185[\fB\-hack\fR] 186[\fB\-www\fR] 187[\fB\-WWW\fR] 188[\fB\-HTTP\fR] 189[\fB\-engine id\fR] 190[\fB\-tlsextdebug\fR] 191[\fB\-no_ticket\fR] 192[\fB\-id_prefix arg\fR] 193[\fB\-rand file(s)\fR] 194[\fB\-status\fR] 195[\fB\-status_verbose\fR] 196[\fB\-status_timeout nsec\fR] 197[\fB\-status_url url\fR] 198[\fB\-nextprotoneg protocols\fR] 199.SH "DESCRIPTION" 200.IX Header "DESCRIPTION" 201The \fBs_server\fR command implements a generic \s-1SSL/TLS\s0 server which listens
| 128.\" For nroff, turn off justification. Always turn off hyphenation; it makes 129.\" way too many mistakes in technical documents. 130.if n .ad l 131.nh 132.SH "NAME" 133s_server \- SSL/TLS server program 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" 136\&\fBopenssl\fR \fBs_server\fR 137[\fB\-accept port\fR] 138[\fB\-context id\fR] 139[\fB\-verify depth\fR] 140[\fB\-Verify depth\fR] 141[\fB\-crl_check\fR] 142[\fB\-crl_check_all\fR] 143[\fB\-cert filename\fR] 144[\fB\-certform DER|PEM\fR] 145[\fB\-key keyfile\fR] 146[\fB\-keyform DER|PEM\fR] 147[\fB\-pass arg\fR] 148[\fB\-dcert filename\fR] 149[\fB\-dcertform DER|PEM\fR] 150[\fB\-dkey keyfile\fR] 151[\fB\-dkeyform DER|PEM\fR] 152[\fB\-dpass arg\fR] 153[\fB\-dhparam filename\fR] 154[\fB\-nbio\fR] 155[\fB\-nbio_test\fR] 156[\fB\-crlf\fR] 157[\fB\-debug\fR] 158[\fB\-msg\fR] 159[\fB\-state\fR] 160[\fB\-CApath directory\fR] 161[\fB\-CAfile filename\fR] 162[\fB\-nocert\fR] 163[\fB\-cipher cipherlist\fR] 164[\fB\-serverpref\fR] 165[\fB\-quiet\fR] 166[\fB\-no_tmp_rsa\fR] 167[\fB\-ssl2\fR] 168[\fB\-ssl3\fR] 169[\fB\-tls1\fR] 170[\fB\-no_ssl2\fR] 171[\fB\-no_ssl3\fR] 172[\fB\-no_tls1\fR] 173[\fB\-no_dhe\fR] 174[\fB\-no_ecdhe\fR] 175[\fB\-bugs\fR] 176[\fB\-hack\fR] 177[\fB\-www\fR] 178[\fB\-WWW\fR] 179[\fB\-HTTP\fR] 180[\fB\-engine id\fR] 181[\fB\-tlsextdebug\fR] 182[\fB\-no_ticket\fR] 183[\fB\-id_prefix arg\fR] 184[\fB\-rand file(s)\fR] 185[\fB\-status\fR] 186[\fB\-status_verbose\fR] 187[\fB\-status_timeout nsec\fR] 188[\fB\-status_url url\fR] 189[\fB\-nextprotoneg protocols\fR] 190.SH "DESCRIPTION" 191.IX Header "DESCRIPTION" 192The \fBs_server\fR command implements a generic \s-1SSL/TLS\s0 server which listens
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202for connections on a given port using \s-1SSL/TLS.\s0
| 193for connections on a given port using \s-1SSL/TLS\s0.
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203.SH "OPTIONS" 204.IX Header "OPTIONS" 205.IP "\fB\-accept port\fR" 4 206.IX Item "-accept port" 207the \s-1TCP\s0 port to listen on for connections. If not specified 4433 is used. 208.IP "\fB\-context id\fR" 4 209.IX Item "-context id" 210sets the \s-1SSL\s0 context id. It can be given any string value. If this option 211is not present a default value will be used. 212.IP "\fB\-cert certname\fR" 4 213.IX Item "-cert certname" 214The certificate to use, most servers cipher suites require the use of a 215certificate and some require a certificate with a certain public key type:
| 194.SH "OPTIONS" 195.IX Header "OPTIONS" 196.IP "\fB\-accept port\fR" 4 197.IX Item "-accept port" 198the \s-1TCP\s0 port to listen on for connections. If not specified 4433 is used. 199.IP "\fB\-context id\fR" 4 200.IX Item "-context id" 201sets the \s-1SSL\s0 context id. It can be given any string value. If this option 202is not present a default value will be used. 203.IP "\fB\-cert certname\fR" 4 204.IX Item "-cert certname" 205The certificate to use, most servers cipher suites require the use of a 206certificate and some require a certificate with a certain public key type:
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216for example the \s-1DSS\s0 cipher suites require a certificate containing a \s-1DSS 217\&\s0(\s-1DSA\s0) key. If not specified then the filename \*(L"server.pem\*(R" will be used.
| 207for example the \s-1DSS\s0 cipher suites require a certificate containing a \s-1DSS\s0 208(\s-1DSA\s0) key. If not specified then the filename \*(L"server.pem\*(R" will be used.
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218.IP "\fB\-certform format\fR" 4 219.IX Item "-certform format"
| 209.IP "\fB\-certform format\fR" 4 210.IX Item "-certform format"
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220The certificate format to use: \s-1DER\s0 or \s-1PEM. PEM\s0 is the default.
| 211The certificate format to use: \s-1DER\s0 or \s-1PEM\s0. \s-1PEM\s0 is the default.
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221.IP "\fB\-key keyfile\fR" 4 222.IX Item "-key keyfile" 223The private key to use. If not specified then the certificate file will 224be used. 225.IP "\fB\-keyform format\fR" 4 226.IX Item "-keyform format"
| 212.IP "\fB\-key keyfile\fR" 4 213.IX Item "-key keyfile" 214The private key to use. If not specified then the certificate file will 215be used. 216.IP "\fB\-keyform format\fR" 4 217.IX Item "-keyform format"
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227The private format to use: \s-1DER\s0 or \s-1PEM. PEM\s0 is the default.
| 218The private format to use: \s-1DER\s0 or \s-1PEM\s0. \s-1PEM\s0 is the default.
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228.IP "\fB\-pass arg\fR" 4 229.IX Item "-pass arg" 230the private key password source. For more information about the format of \fBarg\fR
| 219.IP "\fB\-pass arg\fR" 4 220.IX Item "-pass arg" 221the private key password source. For more information about the format of \fBarg\fR
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231see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
| 222see the \fB\s-1PASS\s0 \s-1PHRASE\s0 \s-1ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
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232.IP "\fB\-dcert filename\fR, \fB\-dkey keyname\fR" 4 233.IX Item "-dcert filename, -dkey keyname" 234specify an additional certificate and private key, these behave in the 235same manner as the \fB\-cert\fR and \fB\-key\fR options except there is no default 236if they are not specified (no additional certificate and key is used). As 237noted above some cipher suites require a certificate containing a key of 238a certain type. Some cipher suites need a certificate carrying an \s-1RSA\s0 key
| 223.IP "\fB\-dcert filename\fR, \fB\-dkey keyname\fR" 4 224.IX Item "-dcert filename, -dkey keyname" 225specify an additional certificate and private key, these behave in the 226same manner as the \fB\-cert\fR and \fB\-key\fR options except there is no default 227if they are not specified (no additional certificate and key is used). As 228noted above some cipher suites require a certificate containing a key of 229a certain type. Some cipher suites need a certificate carrying an \s-1RSA\s0 key
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239and some a \s-1DSS \s0(\s-1DSA\s0) key. By using \s-1RSA\s0 and \s-1DSS\s0 certificates and keys
| 230and some a \s-1DSS\s0 (\s-1DSA\s0) key. By using \s-1RSA\s0 and \s-1DSS\s0 certificates and keys
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240a server can support clients which only support \s-1RSA\s0 or \s-1DSS\s0 cipher suites 241by using an appropriate certificate. 242.IP "\fB\-dcertform format\fR, \fB\-dkeyform format\fR, \fB\-dpass arg\fR" 4 243.IX Item "-dcertform format, -dkeyform format, -dpass arg" 244additional certificate and private key format and passphrase respectively. 245.IP "\fB\-nocert\fR" 4 246.IX Item "-nocert" 247if this option is set then no certificate is used. This restricts the 248cipher suites available to the anonymous ones (currently just anonymous 249\&\s-1DH\s0). 250.IP "\fB\-dhparam filename\fR" 4 251.IX Item "-dhparam filename" 252the \s-1DH\s0 parameter file to use. The ephemeral \s-1DH\s0 cipher suites generate keys 253using a set of \s-1DH\s0 parameters. If not specified then an attempt is made to 254load the parameters from the server certificate file. If this fails then 255a static set of parameters hard coded into the s_server program will be used. 256.IP "\fB\-no_dhe\fR" 4 257.IX Item "-no_dhe" 258if this option is set then no \s-1DH\s0 parameters will be loaded effectively 259disabling the ephemeral \s-1DH\s0 cipher suites. 260.IP "\fB\-no_ecdhe\fR" 4 261.IX Item "-no_ecdhe" 262if this option is set then no \s-1ECDH\s0 parameters will be loaded effectively 263disabling the ephemeral \s-1ECDH\s0 cipher suites. 264.IP "\fB\-no_tmp_rsa\fR" 4 265.IX Item "-no_tmp_rsa" 266certain export cipher suites sometimes use a temporary \s-1RSA\s0 key, this option 267disables temporary \s-1RSA\s0 key generation. 268.IP "\fB\-verify depth\fR, \fB\-Verify depth\fR" 4 269.IX Item "-verify depth, -Verify depth" 270The verify depth to use. This specifies the maximum length of the 271client certificate chain and makes the server request a certificate from 272the client. With the \fB\-verify\fR option a certificate is requested but the 273client does not have to send one, with the \fB\-Verify\fR option the client 274must supply a certificate or an error occurs. 275.Sp 276If the ciphersuite cannot request a client certificate (for example an 277anonymous ciphersuite or \s-1PSK\s0) this option has no effect. 278.IP "\fB\-crl_check\fR, \fB\-crl_check_all\fR" 4 279.IX Item "-crl_check, -crl_check_all"
| 231a server can support clients which only support \s-1RSA\s0 or \s-1DSS\s0 cipher suites 232by using an appropriate certificate. 233.IP "\fB\-dcertform format\fR, \fB\-dkeyform format\fR, \fB\-dpass arg\fR" 4 234.IX Item "-dcertform format, -dkeyform format, -dpass arg" 235additional certificate and private key format and passphrase respectively. 236.IP "\fB\-nocert\fR" 4 237.IX Item "-nocert" 238if this option is set then no certificate is used. This restricts the 239cipher suites available to the anonymous ones (currently just anonymous 240\&\s-1DH\s0). 241.IP "\fB\-dhparam filename\fR" 4 242.IX Item "-dhparam filename" 243the \s-1DH\s0 parameter file to use. The ephemeral \s-1DH\s0 cipher suites generate keys 244using a set of \s-1DH\s0 parameters. If not specified then an attempt is made to 245load the parameters from the server certificate file. If this fails then 246a static set of parameters hard coded into the s_server program will be used. 247.IP "\fB\-no_dhe\fR" 4 248.IX Item "-no_dhe" 249if this option is set then no \s-1DH\s0 parameters will be loaded effectively 250disabling the ephemeral \s-1DH\s0 cipher suites. 251.IP "\fB\-no_ecdhe\fR" 4 252.IX Item "-no_ecdhe" 253if this option is set then no \s-1ECDH\s0 parameters will be loaded effectively 254disabling the ephemeral \s-1ECDH\s0 cipher suites. 255.IP "\fB\-no_tmp_rsa\fR" 4 256.IX Item "-no_tmp_rsa" 257certain export cipher suites sometimes use a temporary \s-1RSA\s0 key, this option 258disables temporary \s-1RSA\s0 key generation. 259.IP "\fB\-verify depth\fR, \fB\-Verify depth\fR" 4 260.IX Item "-verify depth, -Verify depth" 261The verify depth to use. This specifies the maximum length of the 262client certificate chain and makes the server request a certificate from 263the client. With the \fB\-verify\fR option a certificate is requested but the 264client does not have to send one, with the \fB\-Verify\fR option the client 265must supply a certificate or an error occurs. 266.Sp 267If the ciphersuite cannot request a client certificate (for example an 268anonymous ciphersuite or \s-1PSK\s0) this option has no effect. 269.IP "\fB\-crl_check\fR, \fB\-crl_check_all\fR" 4 270.IX Item "-crl_check, -crl_check_all"
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280Check the peer certificate has not been revoked by its \s-1CA.\s0
| 271Check the peer certificate has not been revoked by its \s-1CA\s0.
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281The \s-1CRL\s0(s) are appended to the certificate file. With the \fB\-crl_check_all\fR 282option all CRLs of all CAs in the chain are checked. 283.IP "\fB\-CApath directory\fR" 4 284.IX Item "-CApath directory" 285The directory to use for client certificate verification. This directory 286must be in \*(L"hash format\*(R", see \fBverify\fR for more information. These are 287also used when building the server certificate chain. 288.IP "\fB\-CAfile file\fR" 4 289.IX Item "-CAfile file" 290A file containing trusted certificates to use during client authentication 291and to use when attempting to build the server certificate chain. The list 292is also used in the list of acceptable client CAs passed to the client when 293a certificate is requested. 294.IP "\fB\-state\fR" 4 295.IX Item "-state" 296prints out the \s-1SSL\s0 session states. 297.IP "\fB\-debug\fR" 4 298.IX Item "-debug" 299print extensive debugging information including a hex dump of all traffic. 300.IP "\fB\-msg\fR" 4 301.IX Item "-msg" 302show all protocol messages with hex dump. 303.IP "\fB\-nbio_test\fR" 4 304.IX Item "-nbio_test" 305tests non blocking I/O 306.IP "\fB\-nbio\fR" 4 307.IX Item "-nbio" 308turns on non blocking I/O 309.IP "\fB\-crlf\fR" 4 310.IX Item "-crlf"
| 272The \s-1CRL\s0(s) are appended to the certificate file. With the \fB\-crl_check_all\fR 273option all CRLs of all CAs in the chain are checked. 274.IP "\fB\-CApath directory\fR" 4 275.IX Item "-CApath directory" 276The directory to use for client certificate verification. This directory 277must be in \*(L"hash format\*(R", see \fBverify\fR for more information. These are 278also used when building the server certificate chain. 279.IP "\fB\-CAfile file\fR" 4 280.IX Item "-CAfile file" 281A file containing trusted certificates to use during client authentication 282and to use when attempting to build the server certificate chain. The list 283is also used in the list of acceptable client CAs passed to the client when 284a certificate is requested. 285.IP "\fB\-state\fR" 4 286.IX Item "-state" 287prints out the \s-1SSL\s0 session states. 288.IP "\fB\-debug\fR" 4 289.IX Item "-debug" 290print extensive debugging information including a hex dump of all traffic. 291.IP "\fB\-msg\fR" 4 292.IX Item "-msg" 293show all protocol messages with hex dump. 294.IP "\fB\-nbio_test\fR" 4 295.IX Item "-nbio_test" 296tests non blocking I/O 297.IP "\fB\-nbio\fR" 4 298.IX Item "-nbio" 299turns on non blocking I/O 300.IP "\fB\-crlf\fR" 4 301.IX Item "-crlf"
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311this option translated a line feed from the terminal into \s-1CR+LF.\s0
| 302this option translated a line feed from the terminal into \s-1CR+LF\s0.
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312.IP "\fB\-quiet\fR" 4 313.IX Item "-quiet" 314inhibit printing of session and certificate information. 315.IP "\fB\-psk_hint hint\fR" 4 316.IX Item "-psk_hint hint" 317Use the \s-1PSK\s0 identity hint \fBhint\fR when using a \s-1PSK\s0 cipher suite. 318.IP "\fB\-psk key\fR" 4 319.IX Item "-psk key" 320Use the \s-1PSK\s0 key \fBkey\fR when using a \s-1PSK\s0 cipher suite. The key is 321given as a hexadecimal number without leading 0x, for example \-psk 3221a2b3c4d. 323.IP "\fB\-ssl2\fR, \fB\-ssl3\fR, \fB\-tls1\fR, \fB\-no_ssl2\fR, \fB\-no_ssl3\fR, \fB\-no_tls1\fR" 4 324.IX Item "-ssl2, -ssl3, -tls1, -no_ssl2, -no_ssl3, -no_tls1" 325these options disable the use of certain \s-1SSL\s0 or \s-1TLS\s0 protocols. By default 326the initial handshake uses a method which should be compatible with all 327servers and permit them to use \s-1SSL\s0 v3, \s-1SSL\s0 v2 or \s-1TLS\s0 as appropriate. 328.IP "\fB\-bugs\fR" 4 329.IX Item "-bugs" 330there are several known bug in \s-1SSL\s0 and \s-1TLS\s0 implementations. Adding this 331option enables various workarounds. 332.IP "\fB\-hack\fR" 4 333.IX Item "-hack" 334this option enables a further workaround for some some early Netscape 335\&\s-1SSL\s0 code (?). 336.IP "\fB\-cipher cipherlist\fR" 4 337.IX Item "-cipher cipherlist" 338this allows the cipher list used by the server to be modified. When 339the client sends a list of supported ciphers the first client cipher 340also included in the server list is used. Because the client specifies 341the preference order, the order of the server cipherlist irrelevant. See 342the \fBciphers\fR command for more information. 343.IP "\fB\-serverpref\fR" 4 344.IX Item "-serverpref" 345use the server's cipher preferences, rather than the client's preferences. 346.IP "\fB\-tlsextdebug\fR" 4 347.IX Item "-tlsextdebug" 348print out a hex dump of any \s-1TLS\s0 extensions received from the server. 349.IP "\fB\-no_ticket\fR" 4 350.IX Item "-no_ticket" 351disable RFC4507bis session ticket support. 352.IP "\fB\-www\fR" 4 353.IX Item "-www" 354sends a status message back to the client when it connects. This includes 355lots of information about the ciphers used and various session parameters. 356The output is in \s-1HTML\s0 format so this option will normally be used with a 357web browser. 358.IP "\fB\-WWW\fR" 4 359.IX Item "-WWW" 360emulates a simple web server. Pages will be resolved relative to the 361current directory, for example if the \s-1URL\s0 https://myhost/page.html is 362requested the file ./page.html will be loaded. 363.IP "\fB\-HTTP\fR" 4 364.IX Item "-HTTP" 365emulates a simple web server. Pages will be resolved relative to the 366current directory, for example if the \s-1URL\s0 https://myhost/page.html is 367requested the file ./page.html will be loaded. The files loaded are 368assumed to contain a complete and correct \s-1HTTP\s0 response (lines that 369are part of the \s-1HTTP\s0 response line and headers must end with \s-1CRLF\s0). 370.IP "\fB\-engine id\fR" 4 371.IX Item "-engine id" 372specifying an engine (by its unique \fBid\fR string) will cause \fBs_server\fR 373to attempt to obtain a functional reference to the specified engine, 374thus initialising it if needed. The engine will then be set as the default 375for all available algorithms. 376.IP "\fB\-id_prefix arg\fR" 4 377.IX Item "-id_prefix arg" 378generate \s-1SSL/TLS\s0 session IDs prefixed by \fBarg\fR. This is mostly useful 379for testing any \s-1SSL/TLS\s0 code (eg. proxies) that wish to deal with multiple 380servers, when each of which might be generating a unique range of session 381IDs (eg. with a certain prefix). 382.IP "\fB\-rand file(s)\fR" 4 383.IX Item "-rand file(s)" 384a file or files containing random data used to seed the random number 385generator, or an \s-1EGD\s0 socket (see \fIRAND_egd\fR\|(3)). 386Multiple files can be specified separated by a OS-dependent character. 387The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for 388all others. 389.IP "\fB\-status\fR" 4 390.IX Item "-status" 391enables certificate status request support (aka \s-1OCSP\s0 stapling). 392.IP "\fB\-status_verbose\fR" 4 393.IX Item "-status_verbose" 394enables certificate status request support (aka \s-1OCSP\s0 stapling) and gives 395a verbose printout of the \s-1OCSP\s0 response. 396.IP "\fB\-status_timeout nsec\fR" 4 397.IX Item "-status_timeout nsec" 398sets the timeout for \s-1OCSP\s0 response to \fBnsec\fR seconds. 399.IP "\fB\-status_url url\fR" 4 400.IX Item "-status_url url" 401sets a fallback responder \s-1URL\s0 to use if no responder \s-1URL\s0 is present in the 402server certificate. Without this option an error is returned if the server 403certificate does not contain a responder address. 404.IP "\fB\-nextprotoneg protocols\fR" 4 405.IX Item "-nextprotoneg protocols" 406enable Next Protocol Negotiation \s-1TLS\s0 extension and provide a 407comma-separated list of supported protocol names. 408The list should contain most wanted protocols first. 409Protocol names are printable \s-1ASCII\s0 strings, for example \*(L"http/1.1\*(R" or 410\&\*(L"spdy/3\*(R". 411.SH "CONNECTED COMMANDS" 412.IX Header "CONNECTED COMMANDS" 413If a connection request is established with an \s-1SSL\s0 client and neither the 414\&\fB\-www\fR nor the \fB\-WWW\fR option has been used then normally any data received 415from the client is displayed and any key presses will be sent to the client. 416.PP 417Certain single letter commands are also recognized which perform special 418operations: these are listed below. 419.IP "\fBq\fR" 4 420.IX Item "q" 421end the current \s-1SSL\s0 connection but still accept new connections. 422.IP "\fBQ\fR" 4 423.IX Item "Q" 424end the current \s-1SSL\s0 connection and exit. 425.IP "\fBr\fR" 4 426.IX Item "r" 427renegotiate the \s-1SSL\s0 session. 428.IP "\fBR\fR" 4 429.IX Item "R" 430renegotiate the \s-1SSL\s0 session and request a client certificate. 431.IP "\fBP\fR" 4 432.IX Item "P" 433send some plain text down the underlying \s-1TCP\s0 connection: this should 434cause the client to disconnect due to a protocol violation. 435.IP "\fBS\fR" 4 436.IX Item "S" 437print out some session cache status information. 438.SH "NOTES" 439.IX Header "NOTES" 440\&\fBs_server\fR can be used to debug \s-1SSL\s0 clients. To accept connections from 441a web browser the command: 442.PP 443.Vb 1 444\& openssl s_server \-accept 443 \-www 445.Ve 446.PP 447can be used for example. 448.PP 449Most web browsers (in particular Netscape and \s-1MSIE\s0) only support \s-1RSA\s0 cipher 450suites, so they cannot connect to servers which don't use a certificate 451carrying an \s-1RSA\s0 key or a version of OpenSSL with \s-1RSA\s0 disabled. 452.PP 453Although specifying an empty list of CAs when requesting a client certificate 454is strictly speaking a protocol violation, some \s-1SSL\s0 clients interpret this to 455mean any \s-1CA\s0 is acceptable. This is useful for debugging purposes. 456.PP 457The session parameters can printed out using the \fBsess_id\fR program. 458.SH "BUGS" 459.IX Header "BUGS" 460Because this program has a lot of options and also because some of 461the techniques used are rather old, the C source of s_server is rather 462hard to read and not a model of how things should be done. A typical 463\&\s-1SSL\s0 server program would be much simpler. 464.PP 465The output of common ciphers is wrong: it just gives the list of ciphers that 466OpenSSL recognizes and the client supports. 467.PP 468There should be a way for the \fBs_server\fR program to print out details of any 469unknown cipher suites a client says it supports. 470.SH "SEE ALSO" 471.IX Header "SEE ALSO" 472\&\fIsess_id\fR\|(1), \fIs_client\fR\|(1), \fIciphers\fR\|(1)
| 303.IP "\fB\-quiet\fR" 4 304.IX Item "-quiet" 305inhibit printing of session and certificate information. 306.IP "\fB\-psk_hint hint\fR" 4 307.IX Item "-psk_hint hint" 308Use the \s-1PSK\s0 identity hint \fBhint\fR when using a \s-1PSK\s0 cipher suite. 309.IP "\fB\-psk key\fR" 4 310.IX Item "-psk key" 311Use the \s-1PSK\s0 key \fBkey\fR when using a \s-1PSK\s0 cipher suite. The key is 312given as a hexadecimal number without leading 0x, for example \-psk 3131a2b3c4d. 314.IP "\fB\-ssl2\fR, \fB\-ssl3\fR, \fB\-tls1\fR, \fB\-no_ssl2\fR, \fB\-no_ssl3\fR, \fB\-no_tls1\fR" 4 315.IX Item "-ssl2, -ssl3, -tls1, -no_ssl2, -no_ssl3, -no_tls1" 316these options disable the use of certain \s-1SSL\s0 or \s-1TLS\s0 protocols. By default 317the initial handshake uses a method which should be compatible with all 318servers and permit them to use \s-1SSL\s0 v3, \s-1SSL\s0 v2 or \s-1TLS\s0 as appropriate. 319.IP "\fB\-bugs\fR" 4 320.IX Item "-bugs" 321there are several known bug in \s-1SSL\s0 and \s-1TLS\s0 implementations. Adding this 322option enables various workarounds. 323.IP "\fB\-hack\fR" 4 324.IX Item "-hack" 325this option enables a further workaround for some some early Netscape 326\&\s-1SSL\s0 code (?). 327.IP "\fB\-cipher cipherlist\fR" 4 328.IX Item "-cipher cipherlist" 329this allows the cipher list used by the server to be modified. When 330the client sends a list of supported ciphers the first client cipher 331also included in the server list is used. Because the client specifies 332the preference order, the order of the server cipherlist irrelevant. See 333the \fBciphers\fR command for more information. 334.IP "\fB\-serverpref\fR" 4 335.IX Item "-serverpref" 336use the server's cipher preferences, rather than the client's preferences. 337.IP "\fB\-tlsextdebug\fR" 4 338.IX Item "-tlsextdebug" 339print out a hex dump of any \s-1TLS\s0 extensions received from the server. 340.IP "\fB\-no_ticket\fR" 4 341.IX Item "-no_ticket" 342disable RFC4507bis session ticket support. 343.IP "\fB\-www\fR" 4 344.IX Item "-www" 345sends a status message back to the client when it connects. This includes 346lots of information about the ciphers used and various session parameters. 347The output is in \s-1HTML\s0 format so this option will normally be used with a 348web browser. 349.IP "\fB\-WWW\fR" 4 350.IX Item "-WWW" 351emulates a simple web server. Pages will be resolved relative to the 352current directory, for example if the \s-1URL\s0 https://myhost/page.html is 353requested the file ./page.html will be loaded. 354.IP "\fB\-HTTP\fR" 4 355.IX Item "-HTTP" 356emulates a simple web server. Pages will be resolved relative to the 357current directory, for example if the \s-1URL\s0 https://myhost/page.html is 358requested the file ./page.html will be loaded. The files loaded are 359assumed to contain a complete and correct \s-1HTTP\s0 response (lines that 360are part of the \s-1HTTP\s0 response line and headers must end with \s-1CRLF\s0). 361.IP "\fB\-engine id\fR" 4 362.IX Item "-engine id" 363specifying an engine (by its unique \fBid\fR string) will cause \fBs_server\fR 364to attempt to obtain a functional reference to the specified engine, 365thus initialising it if needed. The engine will then be set as the default 366for all available algorithms. 367.IP "\fB\-id_prefix arg\fR" 4 368.IX Item "-id_prefix arg" 369generate \s-1SSL/TLS\s0 session IDs prefixed by \fBarg\fR. This is mostly useful 370for testing any \s-1SSL/TLS\s0 code (eg. proxies) that wish to deal with multiple 371servers, when each of which might be generating a unique range of session 372IDs (eg. with a certain prefix). 373.IP "\fB\-rand file(s)\fR" 4 374.IX Item "-rand file(s)" 375a file or files containing random data used to seed the random number 376generator, or an \s-1EGD\s0 socket (see \fIRAND_egd\fR\|(3)). 377Multiple files can be specified separated by a OS-dependent character. 378The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for 379all others. 380.IP "\fB\-status\fR" 4 381.IX Item "-status" 382enables certificate status request support (aka \s-1OCSP\s0 stapling). 383.IP "\fB\-status_verbose\fR" 4 384.IX Item "-status_verbose" 385enables certificate status request support (aka \s-1OCSP\s0 stapling) and gives 386a verbose printout of the \s-1OCSP\s0 response. 387.IP "\fB\-status_timeout nsec\fR" 4 388.IX Item "-status_timeout nsec" 389sets the timeout for \s-1OCSP\s0 response to \fBnsec\fR seconds. 390.IP "\fB\-status_url url\fR" 4 391.IX Item "-status_url url" 392sets a fallback responder \s-1URL\s0 to use if no responder \s-1URL\s0 is present in the 393server certificate. Without this option an error is returned if the server 394certificate does not contain a responder address. 395.IP "\fB\-nextprotoneg protocols\fR" 4 396.IX Item "-nextprotoneg protocols" 397enable Next Protocol Negotiation \s-1TLS\s0 extension and provide a 398comma-separated list of supported protocol names. 399The list should contain most wanted protocols first. 400Protocol names are printable \s-1ASCII\s0 strings, for example \*(L"http/1.1\*(R" or 401\&\*(L"spdy/3\*(R". 402.SH "CONNECTED COMMANDS" 403.IX Header "CONNECTED COMMANDS" 404If a connection request is established with an \s-1SSL\s0 client and neither the 405\&\fB\-www\fR nor the \fB\-WWW\fR option has been used then normally any data received 406from the client is displayed and any key presses will be sent to the client. 407.PP 408Certain single letter commands are also recognized which perform special 409operations: these are listed below. 410.IP "\fBq\fR" 4 411.IX Item "q" 412end the current \s-1SSL\s0 connection but still accept new connections. 413.IP "\fBQ\fR" 4 414.IX Item "Q" 415end the current \s-1SSL\s0 connection and exit. 416.IP "\fBr\fR" 4 417.IX Item "r" 418renegotiate the \s-1SSL\s0 session. 419.IP "\fBR\fR" 4 420.IX Item "R" 421renegotiate the \s-1SSL\s0 session and request a client certificate. 422.IP "\fBP\fR" 4 423.IX Item "P" 424send some plain text down the underlying \s-1TCP\s0 connection: this should 425cause the client to disconnect due to a protocol violation. 426.IP "\fBS\fR" 4 427.IX Item "S" 428print out some session cache status information. 429.SH "NOTES" 430.IX Header "NOTES" 431\&\fBs_server\fR can be used to debug \s-1SSL\s0 clients. To accept connections from 432a web browser the command: 433.PP 434.Vb 1 435\& openssl s_server \-accept 443 \-www 436.Ve 437.PP 438can be used for example. 439.PP 440Most web browsers (in particular Netscape and \s-1MSIE\s0) only support \s-1RSA\s0 cipher 441suites, so they cannot connect to servers which don't use a certificate 442carrying an \s-1RSA\s0 key or a version of OpenSSL with \s-1RSA\s0 disabled. 443.PP 444Although specifying an empty list of CAs when requesting a client certificate 445is strictly speaking a protocol violation, some \s-1SSL\s0 clients interpret this to 446mean any \s-1CA\s0 is acceptable. This is useful for debugging purposes. 447.PP 448The session parameters can printed out using the \fBsess_id\fR program. 449.SH "BUGS" 450.IX Header "BUGS" 451Because this program has a lot of options and also because some of 452the techniques used are rather old, the C source of s_server is rather 453hard to read and not a model of how things should be done. A typical 454\&\s-1SSL\s0 server program would be much simpler. 455.PP 456The output of common ciphers is wrong: it just gives the list of ciphers that 457OpenSSL recognizes and the client supports. 458.PP 459There should be a way for the \fBs_server\fR program to print out details of any 460unknown cipher suites a client says it supports. 461.SH "SEE ALSO" 462.IX Header "SEE ALSO" 463\&\fIsess_id\fR\|(1), \fIs_client\fR\|(1), \fIciphers\fR\|(1)
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