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Hakase
2018-04-27 20:47:40 +09:00
parent 6aa2bc2941
commit a08448ab40
304 changed files with 7574 additions and 2162 deletions
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doc/man3/SSL_CTX_use_psk_identity_hint.pod
+41 -33
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@@ -16,52 +16,30 @@ SSL_set_psk_find_session_callback
#include <openssl/ssl.h>
typedef unsigned int (*SSL_psk_server_cb_func)(SSL *ssl,
const char *identity,
unsigned char *psk,
unsigned int max_psk_len);
typedef int (*SSL_psk_find_session_cb_func)(SSL *ssl,
const unsigned char *identity,
size_t identity_len,
SSL_SESSION **sess);
void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
SSL_psk_find_session_cb_func cb);
void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb);
typedef unsigned int (*SSL_psk_server_cb_func)(SSL *ssl,
const char *identity,
unsigned char *psk,
unsigned int max_psk_len);
int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *hint);
int SSL_use_psk_identity_hint(SSL *ssl, const char *hint);
void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb);
void SSL_set_psk_server_callback(SSL *ssl, SSL_psk_server_cb_func cb);
void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
SSL_psk_find_session_cb_func cb);
void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb);
=head1 DESCRIPTION
TLSv1.3 Pre-Shared Keys (PSKs) and PSKs for TLSv1.2 and below are not
compatible.
Identity hints are not relevant for TLSv1.3. A server application wishing to use
PSK ciphersuites for TLSv1.2 and below may call SSL_CTX_use_psk_identity_hint()
to set the given B<NUL>-terminated PSK identity hint B<hint> for SSL context
object B<ctx>. SSL_use_psk_identity_hint() sets the given B<NUL>-terminated PSK
identity hint B<hint> for the SSL connection object B<ssl>. If B<hint> is
B<NULL> the current hint from B<ctx> or B<ssl> is deleted.
In the case where PSK identity hint is B<NULL>, the server does not send the
ServerKeyExchange message to the client.
A server application for TLSv1.2 and below must provide a callback function
which is called when the server receives the ClientKeyExchange message from the
client. The purpose of the callback function is to validate the
received PSK identity and to fetch the pre-shared key used during the
connection setup phase. The callback is set using the functions
SSL_CTX_set_psk_server_callback() or SSL_set_psk_server_callback(). The callback
function is given the connection in parameter B<ssl>, B<NUL>-terminated PSK
identity sent by the client in parameter B<identity>, and a buffer B<psk> of
length B<max_psk_len> bytes where the pre-shared key is to be stored.
A client application wishing to use TLSv1.3 PSKs must set a different callback
A client application wishing to use TLSv1.3 PSKs should set a callback
using either SSL_CTX_set_psk_use_session_callback() or
SSL_set_psk_use_session_callback() as appropriate.
@@ -77,6 +55,36 @@ case no PSK will be used but the handshake will continue. To do this the
callback should return successfully and ensure that B<*sess> is
NULL.
Identity hints are not relevant for TLSv1.3. A server application wishing to use
PSK ciphersuites for TLSv1.2 and below may call SSL_CTX_use_psk_identity_hint()
to set the given B<NUL>-terminated PSK identity hint B<hint> for SSL context
object B<ctx>. SSL_use_psk_identity_hint() sets the given B<NUL>-terminated PSK
identity hint B<hint> for the SSL connection object B<ssl>. If B<hint> is
B<NULL> the current hint from B<ctx> or B<ssl> is deleted.
In the case where PSK identity hint is B<NULL>, the server does not send the
ServerKeyExchange message to the client.
A server application wishing to use PSKs for TLSv1.2 and below must provide a
callback function which is called when the server receives the
ClientKeyExchange message from the client. The purpose of the callback function
is to validate the received PSK identity and to fetch the pre-shared key used
during the connection setup phase. The callback is set using the functions
SSL_CTX_set_psk_server_callback() or SSL_set_psk_server_callback(). The callback
function is given the connection in parameter B<ssl>, B<NUL>-terminated PSK
identity sent by the client in parameter B<identity>, and a buffer B<psk> of
length B<max_psk_len> bytes where the pre-shared key is to be stored.
The callback for use in TLSv1.2 will also work in TLSv1.3 although it is
recommended to use SSL_CTX_set_psk_find_session_callback()
or SSL_set_psk_find_session_callback() for this purpose instead. If TLSv1.3 has
been negotiated then OpenSSL will first check to see if a callback has been set
via SSL_CTX_set_psk_find_session_callback() or SSL_set_psk_find_session_callback()
and it will use that in preference. If no such callback is present then it will
check to see if a callback has been set via SSL_CTX_set_psk_server_callback() or
SSL_set_psk_server_callback() and use that. In this case the handshake digest
will default to SHA-256 for any returned PSK.
=head1 NOTES
A connection established via a TLSv1.3 PSK will appear as if session resumption