RFC 5246, "The Transport Layer Security (TLS) Protocol Version 1.2", August 2008

Note: This RFC has been obsoleted by RFC 8446

Note: This RFC has been updated by RFC 5746, RFC 5878, RFC 6176, RFC 7465, RFC 7507, RFC 7568, RFC 7627, RFC 7685, RFC 7905, RFC 7919, RFC 8447, RFC 9155

Errata ID: 2864
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfredo Pironti
Date Reported: 2011-07-19
Verifier Name: Sean Turner
Date Verified: 2012-01-09

Section A.4.2 says:

struct {
    ClientCertificateType certificate_types<1..2^8-1>;
    DistinguishedName certificate_authorities<0..2^16-1>;
} CertificateRequest;

--- Fixed by errata 1585 to

struct {
    ClientCertificateType certificate_types<1..2^8-1>;
    SignatureAndHashAlgorithm
      supported_signature_algorithms<2^16-1>;
    DistinguishedName certificate_authorities<0..2^16-1>;
} CertificateRequest;

It should say:

struct {
    ClientCertificateType certificate_types<1..2^8-1>;
    SignatureAndHashAlgorithm
      supported_signature_algorithms<2..2^16-2>;
    DistinguishedName certificate_authorities<0..2^16-1>;
} CertificateRequest;

Notes:

The supported_signature_algorithms field is a variable length array. As such ceiling and floor should be specified, and they should be multiple of the base type (which is two bytes long in this case).

Report New Errata