.\" $NetBSD: SSL_CIPHER_get_name.3,v 1.8 2003/07/24 14:16:43 itojun Exp $ .\" .\" Automatically generated by Pod::Man version 1.02 .\" Thu Jul 24 13:08:09 2003 .\" .\" Standard preamble: .\" ====================================================================== .de Sh \" Subsection heading .br .if t .Sp .ne 5 .PP \fB\\$1\fR .PP .. .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Ip \" List item .br .ie \\n(.$>=3 .ne \\$3 .el .ne 3 .IP "\\$1" \\$2 .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. | will give a .\" real vertical bar. \*(C+ will give a nicer C++. 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If the argument is the \s-1NULL\s0 pointer, a pointer to the constant value \*(L"\s-1NONE\s0\*(R" is returned. .PP \&\fISSL_CIPHER_get_bits()\fR returns the number of secret bits used for \fBcipher\fR. If \&\fBalg_bits\fR is not \s-1NULL\s0, it contains the number of bits processed by the chosen algorithm. If \fBcipher\fR is \s-1NULL\s0, 0 is returned. .PP \&\fISSL_CIPHER_get_version()\fR returns the protocol version for \fBcipher\fR, currently \&\*(L"SSLv2\*(R", \*(L"SSLv3\*(R", or \*(L"TLSv1\*(R". If \fBcipher\fR is \s-1NULL\s0, \*(L"(\s-1NONE\s0)\*(R" is returned. .PP \&\fISSL_CIPHER_description()\fR returns a textual description of the cipher used into the buffer \fBbuf\fR of length \fBlen\fR provided. \fBlen\fR must be at least 128 bytes, otherwise a pointer to the the string \*(L"Buffer too small\*(R" is returned. If \fBbuf\fR is \s-1NULL\s0, a buffer of 128 bytes is allocated using \&\fIOPENSSL_malloc()\fR. If the allocation fails, a pointer to the string \&\*(L"OPENSSL_malloc Error\*(R" is returned. .SH "NOTES" .IX Header "NOTES" The number of bits processed can be different from the secret bits. An export cipher like e.g. \s-1EXP-RC4\-MD5\s0 has only 40 secret bits. The algorithm does use the full 128 bits (which would be returned for \fBalg_bits\fR), of which however 88bits are fixed. The search space is hence only 40 bits. .PP The string returned by \fISSL_CIPHER_description()\fR in case of success consists of cleartext information separated by one or more blanks in the following sequence: .Ip "" 4 .IX Item "" Textual representation of the cipher name. .Ip "" 4 .IX Item "" Protocol version: \fBSSLv2\fR, \fBSSLv3\fR. The TLSv1 ciphers are flagged with SSLv3. .Ip "Kx=" 4 .IX Item "Kx=" Key exchange method: \fB\s-1RSA\s0\fR (for export ciphers as \fBRSA(512)\fR or \&\fBRSA(1024)\fR), \fB\s-1DH\s0\fR (for export ciphers as \fBDH(512)\fR or \fBDH(1024)\fR), \&\fB\s-1DH/RSA\s0\fR, \fB\s-1DH/DSS\s0\fR, \fBFortezza\fR. .Ip "Au=" 4 .IX Item "Au=" Authentication method: \fB\s-1RSA\s0\fR, \fB\s-1DSS\s0\fR, \fB\s-1DH\s0\fR, \fBNone\fR. None is the representation of anonymous ciphers. .Ip "Enc=" 4 .IX Item "Enc=" Encryption method with number of secret bits: \fBDES(40)\fR, \fBDES(56)\fR, \&\fB3DES(168)\fR, \fBRC4(40)\fR, \fBRC4(56)\fR, \fBRC4(64)\fR, \fBRC4(128)\fR, \&\fBRC2(40)\fR, \fBRC2(56)\fR, \fBRC2(128)\fR, \fBIDEA(128)\fR, \fBFortezza\fR, \fBNone\fR. .Ip "Mac=" 4 .IX Item "Mac=" Message digest: \fB\s-1MD5\s0\fR, \fB\s-1SHA1\s0\fR. .Ip "" 4 .IX Item "" If the cipher is flagged exportable with respect to old \s-1US\s0 crypto regulations, the word "\fBexport\fR" is printed. .SH "EXAMPLES" .IX Header "EXAMPLES" Some examples for the output of \fISSL_CIPHER_description()\fR: .PP .Vb 4 \& EDH-RSA-DES-CBC3-SHA SSLv3 Kx=DH Au=RSA Enc=3DES(168) Mac=SHA1 \& EDH-DSS-DES-CBC3-SHA SSLv3 Kx=DH Au=DSS Enc=3DES(168) Mac=SHA1 \& RC4-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5 \& EXP-RC4-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC4(40) Mac=MD5 export .Ve .SH "BUGS" .IX Header "BUGS" If \fISSL_CIPHER_description()\fR is called with \fBcipher\fR being \s-1NULL\s0, the library crashes. .PP If \fISSL_CIPHER_description()\fR cannot handle a built-in cipher, the according description of the cipher property is \fBunknown\fR. This case should not occur. .SH "RETURN VALUES" .IX Header "RETURN VALUES" See \s-1DESCRIPTION\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" ssl(3), SSL_get_current_cipher(3), SSL_get_ciphers(3), openssl_ciphers(1)