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124 .\" ========================================================================
126 .IX Title "SSL_CIPHER_get_name 3"
127 .TH SSL_CIPHER_get_name 3 "2014-10-15" "0.9.8zc" "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 string which indicates the \s-1SSL/TLS\s0 protocol
155 version that first defined the cipher.
156 This is currently \fBSSLv2\fR or \fBTLSv1/SSLv3\fR.
157 In some cases it should possibly return \*(L"TLSv1.2\*(R" but does not;
158 use \fISSL_CIPHER_description()\fR instead.
159 If \fBcipher\fR is \s-1NULL\s0, \*(L"(\s-1NONE\s0)\*(R" is returned.
161 \&\fISSL_CIPHER_description()\fR returns a textual description of the cipher used
162 into the buffer \fBbuf\fR of length \fBlen\fR provided. \fBlen\fR must be at least
163 128 bytes, otherwise a pointer to the string \*(L"Buffer too small\*(R" is
164 returned. If \fBbuf\fR is \s-1NULL\s0, a buffer of 128 bytes is allocated using
165 \&\fIOPENSSL_malloc()\fR. If the allocation fails, a pointer to the string
166 \&\*(L"OPENSSL_malloc Error\*(R" is returned.
169 The number of bits processed can be different from the secret bits. An
170 export cipher like e.g. \s-1EXP\-RC4\-MD5\s0 has only 40 secret bits. The algorithm
171 does use the full 128 bits (which would be returned for \fBalg_bits\fR), of
172 which however 88bits are fixed. The search space is hence only 40 bits.
174 The string returned by \fISSL_CIPHER_description()\fR in case of success consists
175 of cleartext information separated by one or more blanks in the following
178 .IX Item "<ciphername>"
179 Textual representation of the cipher name.
180 .IP "<protocol version>" 4
181 .IX Item "<protocol version>"
182 Protocol version: \fBSSLv2\fR, \fBSSLv3\fR, \fBTLSv1.2\fR. The TLSv1.0 ciphers are
183 flagged with SSLv3. No new ciphers were added by TLSv1.1.
184 .IP "Kx=<key exchange>" 4
185 .IX Item "Kx=<key exchange>"
186 Key exchange method: \fB\s-1RSA\s0\fR (for export ciphers as \fB\s-1RSA\s0(512)\fR or
187 \&\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),
188 \&\fB\s-1DH/RSA\s0\fR, \fB\s-1DH/DSS\s0\fR, \fBFortezza\fR.
189 .IP "Au=<authentication>" 4
190 .IX Item "Au=<authentication>"
191 Authentication method: \fB\s-1RSA\s0\fR, \fB\s-1DSS\s0\fR, \fB\s-1DH\s0\fR, \fBNone\fR. None is the
192 representation of anonymous ciphers.
193 .IP "Enc=<symmetric encryption method>" 4
194 .IX Item "Enc=<symmetric encryption method>"
195 Encryption method with number of secret bits: \fB\s-1DES\s0(40)\fR, \fB\s-1DES\s0(56)\fR,
196 \&\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,
197 \&\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.
198 .IP "Mac=<message authentication code>" 4
199 .IX Item "Mac=<message authentication code>"
200 Message digest: \fB\s-1MD5\s0\fR, \fB\s-1SHA1\s0\fR.
201 .IP "<export flag>" 4
202 .IX Item "<export flag>"
203 If the cipher is flagged exportable with respect to old \s-1US\s0 crypto
204 regulations, the word "\fBexport\fR" is printed.
206 .IX Header "EXAMPLES"
207 Some examples for the output of \fISSL_CIPHER_description()\fR:
210 \& EDH\-RSA\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=RSA Enc=3DES(168) Mac=SHA1
211 \& EDH\-DSS\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=DSS Enc=3DES(168) Mac=SHA1
212 \& RC4\-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5
213 \& EXP\-RC4\-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC4(40) Mac=MD5 export
216 A comp[lete list can be retrieved by invoking the following command:
219 \& openssl ciphers \-v ALL
223 If \fISSL_CIPHER_description()\fR is called with \fBcipher\fR being \s-1NULL\s0, the
226 If \fISSL_CIPHER_description()\fR cannot handle a built-in cipher, the according
227 description of the cipher property is \fBunknown\fR. This case should not
230 .IX Header "RETURN VALUES"
231 See \s-1DESCRIPTION\s0
233 .IX Header "SEE ALSO"
234 \&\fIssl\fR\|(3), \fISSL_get_current_cipher\fR\|(3),
235 \&\fISSL_get_ciphers\fR\|(3), \fIciphers\fR\|(1)