=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.
+B<cipher> is NULL, it returns "(NONE)".
-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_bits() returns the number of secret bits used for B<cipher>.
+If B<cipher> is NULL, 0 is returned.
SSL_CIPHER_get_version() returns string which indicates the SSL/TLS protocol
-version that first defined the cipher.
-This is currently B<TLSv1/SSLv3>.
-In some cases it should possibly return "TLSv1.2" but does not;
-use SSL_CIPHER_description() instead.
-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.
+version that first defined the cipher. It returns "(NONE)" if B<cipher> is NULL.
SSL_CIPHER_get_cipher_nid() returns the cipher NID corresponding to B<c>.
If there is no cipher (e.g. for ciphersuites with no encryption) then
used by B<c>. If there is no digest (e.g. for AEAD ciphersuites) then
B<NID_undef> 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.
+SSL_CIPHER_description() returns a textual description of the cipher used
+into the buffer B<buf> of length B<len> provided. If B<buf> is provided, it
+must be at least 128 bytes, otherwise a buffer will be allocated using
+OPENSSL_malloc(). If the provided buffer is too small, or the allocation fails,
+B<NULL> is returned.
-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:
+The string returned by SSL_CIPHER_description() consists of several fields
+separated by whitespace:
=over 4
=item <protocol version>
-Protocol version: B<SSLv3>, B<TLSv1.2>. The TLSv1.0 ciphers are
-flagged with SSLv3. No new ciphers were added by TLSv1.1.
+Protocol version, such as B<TLSv1.2>, when the cipher was first defined.
=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>.
+Key exchange method such as B<RSA>, B<ECDHE>, etc.
=item Au=<authentication>
-Authentication method: B<RSA>, B<DSS>, B<DH>, B<None>. None is the
+Authentication method such as B<RSA>, B<None>, etc.. 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>.
+Encryption method, with number of secret bits, such as B<AESGCM(128)>.
=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.
+Message digest, such as B<SHA256>.
=back
-=head1 EXAMPLES
-
Some examples for the output of SSL_CIPHER_description():
- DHE-RSA-DES-CBC3-SHA SSLv3 Kx=DH Au=RSA Enc=3DES(168) Mac=SHA1
- DHE-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
-
-A comp[lete list can be retrieved by invoking the following command:
-
- openssl ciphers -v ALL
-
-=head1 BUGS
-
-If SSL_CIPHER_description() is called with B<cipher> being NULL, the
-library crashes.
+ ECDHE-RSA-AES256-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
+ RSA-PSK-AES256-CBC-SHA384 TLSv1.0 Kx=RSAPSK Au=RSA Enc=AES(256) Mac=SHA384
-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 HISTORY
-=head1 RETURN VALUES
+SSL_CIPHER_get_version() was updated to always return the correct protocol
+string in OpenSSL 1.1.
-See DESCRIPTION
+SSL_CIPHER_description() was changed to return B<NULL> on error,
+rather than a fixed string, in OpenSSL 1.1
=head1 SEE ALSO
{
const char *ver;
const char *kx, *au, *enc, *mac;
- uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
+ uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
static const char *format =
"%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
+ if (buf == NULL) {
+ len = 128;
+ buf = OPENSSL_malloc(len);
+ if (buf == NULL)
+ return NULL;
+ } else if (len < 128)
+ return NULL;
+
alg_mkey = cipher->algorithm_mkey;
alg_auth = cipher->algorithm_auth;
alg_enc = cipher->algorithm_enc;
alg_mac = cipher->algorithm_mac;
- alg_ssl = cipher->algorithm_ssl;
- if (alg_ssl & SSL_SSLV3)
- ver = "SSLv3";
- else if (alg_ssl & SSL_TLSV1)
- ver = "TLSv1.0";
- else if (alg_ssl & SSL_TLSV1_2)
- ver = "TLSv1.2";
- else
- ver = "unknown";
+ ver = SSL_CIPHER_get_version(cipher);
switch (alg_mkey) {
case SSL_kRSA:
break;
}
- if (buf == NULL) {
- len = 128;
- buf = OPENSSL_malloc(len);
- if (buf == NULL)
- return ("OPENSSL_malloc Error");
- } else if (len < 128)
- return ("Buffer too small");
-
BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
return (buf);
char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
{
- int i;
+ uint32_t alg_ssl;
if (c == NULL)
- return ("(NONE)");
- i = (int)(c->id >> 24L);
- if (i == 3)
- return ("TLSv1/SSLv3");
- else
- return ("unknown");
+ return "(NONE)";
+ alg_ssl = c->algorithm_ssl;
+
+ if (alg_ssl & SSL_SSLV3)
+ return "SSLv3";
+ if (alg_ssl & SSL_TLSV1)
+ return "TLSv1.0";
+ if (alg_ssl & SSL_TLSV1_2)
+ return "TLSv1.2";
+ return "unknown";
}
/* return the actual cipher being used */
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