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x509-cert: fixup RDN string representation #1126

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Jun 27, 2023
Merged

x509-cert: fixup RDN string representation #1126

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1fd2852
x509-cert: fixup RDN string representation
baloo Jun 27, 2023
ceaeba7
x509-cert: parse RDN strings according to RFC4514
baloo Jun 27, 2023
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3 changes: 2 additions & 1 deletion x509-cert/src/name.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,8 @@ impl FromStr for RdnSequence {
/// [RFC 4514]: https://datatracker.ietf.org/doc/html/rfc4514
impl fmt::Display for RdnSequence {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for (i, atv) in self.0.iter().enumerate() {
// As per RFC 4514 Section 2.1, the elements are reversed
for (i, atv) in self.0.iter().rev().enumerate() {
match i {
0 => write!(f, "{}", atv)?,
_ => write!(f, ",{}", atv)?,
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21 changes: 21 additions & 0 deletions x509-cert/tests/name.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,27 @@ fn decode_name() {
counter += 1;
}
}

#[cfg(feature = "std")]
{
// https://datatracker.ietf.org/doc/html/rfc4514.html#section-2.1
// If the RDNSequence is an empty sequence, the result is the empty or
// zero-length string.
// Otherwise, the output consists of the string encodings of each
// RelativeDistinguishedName in the RDNSequence (according to Section 2.2),
// starting with the last element of the sequence and moving backwards
// toward the first.
// The encodings of adjoining RelativeDistinguishedNames are separated by
// a comma (',' U+002C) character.
let name = rdn1a.to_string();
assert_eq!(name, "CN=Good CA,O=Test Certificates 2011,C=US");

// https://github.com/RustCrypto/formats/issues/1121
let rdn1 = Name::from_der(&hex!("3081c0310b30090603550406130255533113301106035504080c0a43616c69666f726e69613116301406035504070c0d4d6f756e7461696e205669657731133011060355040a0c0a476f6f676c65204c4c43311e301c06035504030c154f51464176444e4457732e676f6f676c652e636f6d31243022060355040b0c1b6d616e6167656d656e743a64732e67726f75702e3338393131313131293027060a0992268993f22c6401010c196964656e746974793a64732e67726f75702e33383931313131")[..]);
let rdn1a = rdn1.unwrap();
let name = rdn1a.to_string();
assert_eq!(name, "UID=identity:ds.group.3891111,OU=management:ds.group.3891111,CN=OQFAvDNDWs.google.com,O=Google LLC,L=Mountain View,STATEORPROVINCENAME=California,C=US");
}
}

#[test]
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