int SSL_get_security_level(const SSL *s);
void SSL_CTX_set_security_callback(SSL_CTX *ctx,
- int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid,
- void *other, void *ex));
+ int (*cb)(SSL *s, SSL_CTX *ctx, int op,
+ int bits, int nid,
+ void *other, void *ex));
- void SSL_set_security_callback(SSL *s,
- int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid,
- void *other, void *ex));
+ void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op,
+ int bits, int nid,
+ void *other, void *ex));
- int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex);
- int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex);
+ int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op,
+ int bits, int nid, void *other,
+ void *ex);
+ int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op,
+ int bits, int nid, void *other,
+ void *ex);
void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex);
void SSL_set0_security_ex_data(SSL *s, void *ex);
The security level corresponds to a minimum of 80 bits of security. Any
parameters offering below 80 bits of security are excluded. As a result RSA,
DSA and DH keys shorter than 1024 bits and ECC keys shorter than 160 bits
-are prohibited. All export ciphersuites are prohibited since they all offer
-less than 80 bits of security. SSL version 2 is prohibited. Any ciphersuite
+are prohibited. All export cipher suites are prohibited since they all offer
+less than 80 bits of security. SSL version 2 is prohibited. Any cipher suite
using MD5 for the MAC is also prohibited.
=item B<Level 2>
Security level set to 112 bits of security. As a result RSA, DSA and DH keys
shorter than 2048 bits and ECC keys shorter than 224 bits are prohibited.
-In addition to the level 1 exclusions any ciphersuite using RC4 is also
+In addition to the level 1 exclusions any cipher suite using RC4 is also
prohibited. SSL version 3 is also not allowed. Compression is disabled.
=item B<Level 3>
Security level set to 128 bits of security. As a result RSA, DSA and DH keys
shorter than 3072 bits and ECC keys shorter than 256 bits are prohibited.
-In addition to the level 2 exclusions ciphersuites not offering forward
+In addition to the level 2 exclusions cipher suites not offering forward
secrecy are prohibited. TLS versions below 1.1 are not permitted. Session
tickets are disabled.
=item B<Level 4>
-Security level set to 192 bits of security. As a result RSA, DSA and DH keys
-shorter than 7680 bits and ECC keys shorter than 384 bits are prohibited.
-Ciphersuites using SHA1 for the MAC are prohibited. TLS versions below 1.2 are
-not permitted.
+Security level set to 192 bits of security. As a result RSA, DSA and
+DH keys shorter than 7680 bits and ECC keys shorter than 384 bits are
+prohibited. Cipher suites using SHA1 for the MAC are prohibited. TLS
+versions below 1.2 are not permitted.
=item B<Level 5>
avoided.
The bits of security limits affect all relevant parameters including
-ciphersuite encryption algorithms, supported ECC curves, supported
+cipher suite encryption algorithms, supported ECC curves, supported
signature algorithms, DH parameter sizes, certificate key sizes and
signature algorithms. This limit applies no matter what other custom
-settings an application has set: so if the ciphersuite is set to B<ALL>
-then only ciphersuites consistent with the security level are permissible.
+settings an application has set: so if the cipher
suite is set to B<ALL>
+then only cipher suites consistent with the security level are permissible.
See SP800-57 for how the security limits are related to individual
algorithms.
algorithms which can severely degrade performance. For example 256 bits
of security requires the use of RSA keys of at least 15360 bits in size.
-Some restrictions can be gracefully handled: for example ciphersuites
+Some restrictions can be gracefully handled: for example cipher suites
offering insufficient security are not sent by the client and will not
be selected by the server. Other restrictions such as the peer certificate
key size or the DH parameter size will abort the handshake with a fatal
check the return values for errors will misbehave: for example it might
appear that a certificate is not set at all because it had been rejected.
+=head1 RETURN VALUES
+
+SSL_CTX_set_security_level() and SSL_set_security_level() do not return values.
+
+SSL_CTX_get_security_level() and SSL_get_security_level() return a integer that
+represents the security level with B<SSL_CTX> or B<SSL>, respectively.
+
+SSL_CTX_set_security_callback() and SSL_set_security_callback() do not return
+values.
+
+SSL_CTX_get_security_callback() and SSL_get_security_callback() return the pointer
+to the security callback or NULL if the callback is not set.
+
+SSL_CTX_get0_security_ex_data() and SSL_get0_security_ex_data() return the extra
+data pointer or NULL if the ex data is not set.
+
=head1 HISTORY
-These functions were first added to OpenSSL 1.1.0
+These functions were added in OpenSSL 1.1.0.
=head1 COPYRIGHT
-Copyright 2014-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2014-2018 The OpenSSL Project Authors. All Rights Reserved.
-Licensed under the OpenSSL license (the "License"). You may not use
+Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
projects / openssl.git / blobdiff