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CHANGES.md: Mention (strict) checks recently added to X509_verify_cert()

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Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13312)
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David von Oheimb 2020-11-04 12:23:34 +01:00 committed by Dr. David von Oheimb
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CHANGES.md
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@ -831,6 +831,30 @@ OpenSSL 3.0
*Richard Levitte*
* Added several checks to X509_verify_cert() according to requirements in
RFC 5280 in case `X509_V_FLAG_X509_STRICT` is set
(which may be done by using the CLI option `-x509_strict`):
* The basicConstraints of CA certificates must be marked critical.
* CA certificates must explicitly include the keyUsage extension.
* If a pathlenConstraint is given the key usage keyCertSign must be allowed.
* The issuer name of any certificate must not be empty.
* The subject name of CA certs, certs with keyUsage crlSign,
and certs without subjectAlternativeName must not be empty.
* If a subjectAlternativeName extension is given it must not be empty.
* The signatureAlgorithm field and the cert signature must be consistent.
* Any given authorityKeyIdentifier and any given subjectKeyIdentifier
must not be marked critical.
* The authorityKeyIdentifier must be given for X.509v3 certs
unless they are self-signed.
* The subjectKeyIdentifier must be given for all X.509v3 CA certs.
*David von Oheimb*
* Certificate verification using X509_verify_cert() meanwhile rejects EC keys
with explicit curve parameters (specifiedCurve) as required by RFC 5480.
*Tomas Mraz*
* For built-in EC curves, ensure an EC_GROUP built from the curve name is
used even when parsing explicit parameters, when loading a encoded key
or calling `EC_GROUP_new_from_ecpkparameters()`/