6a599222bb
This also "reverts" some FreeBSD local changes so we should now be back to using entirely stock OpenSSL. The local changes were simple $FreeBSD$ lines additions, which were required in the CVS days, and the patch for FreeBSD-SA-09:15.ssl which has been superseded with OpenSSL 0.9.8m's RFC5746 'TLS renegotiation extension' support. MFC after: 3 weeks
113 lines
3.6 KiB
Plaintext
113 lines
3.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version, SSL_CIPHER_description - get SSL_CIPHER properties
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/ssl.h>
|
|
|
|
const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher);
|
|
int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher, int *alg_bits);
|
|
char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher);
|
|
char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int size);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
SSL_CIPHER_get_name() returns a pointer to the name of B<cipher>. If the
|
|
argument is the NULL pointer, a pointer to the constant value "NONE" is
|
|
returned.
|
|
|
|
SSL_CIPHER_get_bits() returns the number of secret bits used for B<cipher>. If
|
|
B<alg_bits> is not NULL, it contains the number of bits processed by the
|
|
chosen algorithm. If B<cipher> is NULL, 0 is returned.
|
|
|
|
SSL_CIPHER_get_version() returns the protocol version for B<cipher>, currently
|
|
"SSLv2", "SSLv3", or "TLSv1". If B<cipher> is NULL, "(NONE)" is returned.
|
|
|
|
SSL_CIPHER_description() returns a textual description of the cipher used
|
|
into the buffer B<buf> of length B<len> provided. B<len> must be at least
|
|
128 bytes, otherwise a pointer to the string "Buffer too small" is
|
|
returned. If B<buf> is NULL, a buffer of 128 bytes is allocated using
|
|
OPENSSL_malloc(). If the allocation fails, a pointer to the string
|
|
"OPENSSL_malloc Error" is returned.
|
|
|
|
=head1 NOTES
|
|
|
|
The number of bits processed can be different from the secret bits. An
|
|
export cipher like e.g. EXP-RC4-MD5 has only 40 secret bits. The algorithm
|
|
does use the full 128 bits (which would be returned for B<alg_bits>), of
|
|
which however 88bits are fixed. The search space is hence only 40 bits.
|
|
|
|
The string returned by SSL_CIPHER_description() in case of success consists
|
|
of cleartext information separated by one or more blanks in the following
|
|
sequence:
|
|
|
|
=over 4
|
|
|
|
=item <ciphername>
|
|
|
|
Textual representation of the cipher name.
|
|
|
|
=item <protocol version>
|
|
|
|
Protocol version: B<SSLv2>, B<SSLv3>. The TLSv1 ciphers are flagged with SSLv3.
|
|
|
|
=item Kx=<key exchange>
|
|
|
|
Key exchange method: B<RSA> (for export ciphers as B<RSA(512)> or
|
|
B<RSA(1024)>), B<DH> (for export ciphers as B<DH(512)> or B<DH(1024)>),
|
|
B<DH/RSA>, B<DH/DSS>, B<Fortezza>.
|
|
|
|
=item Au=<authentication>
|
|
|
|
Authentication method: B<RSA>, B<DSS>, B<DH>, B<None>. None is the
|
|
representation of anonymous ciphers.
|
|
|
|
=item Enc=<symmetric encryption method>
|
|
|
|
Encryption method with number of secret bits: B<DES(40)>, B<DES(56)>,
|
|
B<3DES(168)>, B<RC4(40)>, B<RC4(56)>, B<RC4(64)>, B<RC4(128)>,
|
|
B<RC2(40)>, B<RC2(56)>, B<RC2(128)>, B<IDEA(128)>, B<Fortezza>, B<None>.
|
|
|
|
=item Mac=<message authentication code>
|
|
|
|
Message digest: B<MD5>, B<SHA1>.
|
|
|
|
=item <export flag>
|
|
|
|
If the cipher is flagged exportable with respect to old US crypto
|
|
regulations, the word "B<export>" is printed.
|
|
|
|
=back
|
|
|
|
=head1 EXAMPLES
|
|
|
|
Some examples for the output of SSL_CIPHER_description():
|
|
|
|
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
|
|
|
|
=head1 BUGS
|
|
|
|
If SSL_CIPHER_description() is called with B<cipher> being NULL, the
|
|
library crashes.
|
|
|
|
If SSL_CIPHER_description() cannot handle a built-in cipher, the according
|
|
description of the cipher property is B<unknown>. This case should not
|
|
occur.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
See DESCRIPTION
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ssl(3)|ssl(3)>, L<SSL_get_current_cipher(3)|SSL_get_current_cipher(3)>,
|
|
L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>, L<ciphers(1)|ciphers(1)>
|
|
|
|
=cut
|