diff options
Diffstat (limited to 'secure/lib/libssl/man/SSL_CTX_set_max_cert_list.3')
-rw-r--r-- | secure/lib/libssl/man/SSL_CTX_set_max_cert_list.3 | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/secure/lib/libssl/man/SSL_CTX_set_max_cert_list.3 b/secure/lib/libssl/man/SSL_CTX_set_max_cert_list.3 new file mode 100644 index 0000000..2e94813 --- /dev/null +++ b/secure/lib/libssl/man/SSL_CTX_set_max_cert_list.3 @@ -0,0 +1,199 @@ +.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.23) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.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. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +SSL_CTX_set_max_cert_list, SSL_CTX_get_max_cert_list, SSL_set_max_cert_list, SSL_get_max_cert_list, \- manipulate allowed for the peer's certificate chain +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ssl.h> +\& +\& long SSL_CTX_set_max_cert_list(SSL_CTX *ctx, long size); +\& long SSL_CTX_get_max_cert_list(SSL_CTX *ctx); +\& +\& long SSL_set_max_cert_list(SSL *ssl, long size); +\& long SSL_get_max_cert_list(SSL *ctx); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fISSL_CTX_set_max_cert_list()\fR sets the maximum size allowed for the peer's +certificate chain for all \s-1SSL\s0 objects created from \fBctx\fR to be <size> bytes. +The \s-1SSL\s0 objects inherit the setting valid for \fBctx\fR at the time +\&\fISSL_new\fR\|(3) is being called. +.PP +\&\fISSL_CTX_get_max_cert_list()\fR returns the currently set maximum size for \fBctx\fR. +.PP +\&\fISSL_set_max_cert_list()\fR sets the maximum size allowed for the peer's +certificate chain for \fBssl\fR to be <size> bytes. This setting stays valid +until a new value is set. +.PP +\&\fISSL_get_max_cert_list()\fR returns the currently set maximum size for \fBssl\fR. +.SH "NOTES" +.IX Header "NOTES" +During the handshake process, the peer may send a certificate chain. +The \s-1TLS/SSL\s0 standard does not give any maximum size of the certificate chain. +The OpenSSL library handles incoming data by a dynamically allocated buffer. +In order to prevent this buffer from growing without bounds due to data +received from a faulty or malicious peer, a maximum size for the certificate +chain is set. +.PP +The default value for the maximum certificate chain size is 100kB (30kB +on the 16bit \s-1DOS\s0 platform). This should be sufficient for usual certificate +chains (OpenSSL's default maximum chain length is 10, see +\&\fISSL_CTX_set_verify\fR\|(3), and certificates +without special extensions have a typical size of 1\-2kB). +.PP +For special applications it can be necessary to extend the maximum certificate +chain size allowed to be sent by the peer, see e.g. the work on +\&\*(L"Internet X.509 Public Key Infrastructure Proxy Certificate Profile\*(R" +and \*(L"\s-1TLS\s0 Delegation Protocol\*(R" at http://www.ietf.org/ and +http://www.globus.org/ . +.PP +Under normal conditions it should never be necessary to set a value smaller +than the default, as the buffer is handled dynamically and only uses the +memory actually required by the data sent by the peer. +.PP +If the maximum certificate chain size allowed is exceeded, the handshake will +fail with a \s-1SSL_R_EXCESSIVE_MESSAGE_SIZE\s0 error. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fISSL_CTX_set_max_cert_list()\fR and \fISSL_set_max_cert_list()\fR return the previously +set value. +.PP +\&\fISSL_CTX_get_max_cert_list()\fR and \fISSL_get_max_cert_list()\fR return the currently +set value. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIssl\fR\|(3), \fISSL_new\fR\|(3), +\&\fISSL_CTX_set_verify\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +SSL*_set/\fIget_max_cert_list()\fR have been introduced in OpenSSL 0.9.7. |