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124 .\" ========================================================================
126 .IX Title "SSL_CIPHER_get_name 3"
127 .TH SSL_CIPHER_get_name 3 "2012-04-26" "1.0.1b" "OpenSSL"
128 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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133 SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version, SSL_CIPHER_description \- get SSL_CIPHER properties
135 .IX Header "SYNOPSIS"
137 \& #include <openssl/ssl.h>
139 \& const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher);
140 \& int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher, int *alg_bits);
141 \& char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher);
142 \& char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int size);
145 .IX Header "DESCRIPTION"
146 \&\fISSL_CIPHER_get_name()\fR returns a pointer to the name of \fBcipher\fR. If the
147 argument is the \s-1NULL\s0 pointer, a pointer to the constant value \*(L"\s-1NONE\s0\*(R" is
150 \&\fISSL_CIPHER_get_bits()\fR returns the number of secret bits used for \fBcipher\fR. If
151 \&\fBalg_bits\fR is not \s-1NULL\s0, it contains the number of bits processed by the
152 chosen algorithm. If \fBcipher\fR is \s-1NULL\s0, 0 is returned.
154 \&\fISSL_CIPHER_get_version()\fR returns the protocol version for \fBcipher\fR, currently
155 \&\*(L"SSLv2\*(R", \*(L"SSLv3\*(R", or \*(L"TLSv1\*(R". If \fBcipher\fR is \s-1NULL\s0, \*(L"(\s-1NONE\s0)\*(R" is returned.
157 \&\fISSL_CIPHER_description()\fR returns a textual description of the cipher used
158 into the buffer \fBbuf\fR of length \fBlen\fR provided. \fBlen\fR must be at least
159 128 bytes, otherwise a pointer to the string \*(L"Buffer too small\*(R" is
160 returned. If \fBbuf\fR is \s-1NULL\s0, a buffer of 128 bytes is allocated using
161 \&\fIOPENSSL_malloc()\fR. If the allocation fails, a pointer to the string
162 \&\*(L"OPENSSL_malloc Error\*(R" is returned.
165 The number of bits processed can be different from the secret bits. An
166 export cipher like e.g. \s-1EXP\-RC4\-MD5\s0 has only 40 secret bits. The algorithm
167 does use the full 128 bits (which would be returned for \fBalg_bits\fR), of
168 which however 88bits are fixed. The search space is hence only 40 bits.
170 The string returned by \fISSL_CIPHER_description()\fR in case of success consists
171 of cleartext information separated by one or more blanks in the following
174 .IX Item "<ciphername>"
175 Textual representation of the cipher name.
176 .IP "<protocol version>" 4
177 .IX Item "<protocol version>"
178 Protocol version: \fBSSLv2\fR, \fBSSLv3\fR. The TLSv1 ciphers are flagged with SSLv3.
179 .IP "Kx=<key exchange>" 4
180 .IX Item "Kx=<key exchange>"
181 Key exchange method: \fB\s-1RSA\s0\fR (for export ciphers as \fB\s-1RSA\s0(512)\fR or
182 \&\fB\s-1RSA\s0(1024)\fR), \fB\s-1DH\s0\fR (for export ciphers as \fB\s-1DH\s0(512)\fR or \fB\s-1DH\s0(1024)\fR),
183 \&\fB\s-1DH/RSA\s0\fR, \fB\s-1DH/DSS\s0\fR, \fBFortezza\fR.
184 .IP "Au=<authentication>" 4
185 .IX Item "Au=<authentication>"
186 Authentication method: \fB\s-1RSA\s0\fR, \fB\s-1DSS\s0\fR, \fB\s-1DH\s0\fR, \fBNone\fR. None is the
187 representation of anonymous ciphers.
188 .IP "Enc=<symmetric encryption method>" 4
189 .IX Item "Enc=<symmetric encryption method>"
190 Encryption method with number of secret bits: \fB\s-1DES\s0(40)\fR, \fB\s-1DES\s0(56)\fR,
191 \&\fB3DES(168)\fR, \fB\s-1RC4\s0(40)\fR, \fB\s-1RC4\s0(56)\fR, \fB\s-1RC4\s0(64)\fR, \fB\s-1RC4\s0(128)\fR,
192 \&\fB\s-1RC2\s0(40)\fR, \fB\s-1RC2\s0(56)\fR, \fB\s-1RC2\s0(128)\fR, \fB\s-1IDEA\s0(128)\fR, \fBFortezza\fR, \fBNone\fR.
193 .IP "Mac=<message authentication code>" 4
194 .IX Item "Mac=<message authentication code>"
195 Message digest: \fB\s-1MD5\s0\fR, \fB\s-1SHA1\s0\fR.
196 .IP "<export flag>" 4
197 .IX Item "<export flag>"
198 If the cipher is flagged exportable with respect to old \s-1US\s0 crypto
199 regulations, the word "\fBexport\fR" is printed.
201 .IX Header "EXAMPLES"
202 Some examples for the output of \fISSL_CIPHER_description()\fR:
205 \& EDH\-RSA\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=RSA Enc=3DES(168) Mac=SHA1
206 \& EDH\-DSS\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=DSS Enc=3DES(168) Mac=SHA1
207 \& RC4\-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5
208 \& EXP\-RC4\-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC4(40) Mac=MD5 export
212 If \fISSL_CIPHER_description()\fR is called with \fBcipher\fR being \s-1NULL\s0, the
215 If \fISSL_CIPHER_description()\fR cannot handle a built-in cipher, the according
216 description of the cipher property is \fBunknown\fR. This case should not
219 .IX Header "RETURN VALUES"
220 See \s-1DESCRIPTION\s0
222 .IX Header "SEE ALSO"
223 \&\fIssl\fR\|(3), \fISSL_get_current_cipher\fR\|(3),
224 \&\fISSL_get_ciphers\fR\|(3), \fIciphers\fR\|(1)