step (SIG)

lib/dnsbox-base/src/common_types/mod.rs

@@ -6,6 +6,7 @@ pub mod types;
 mod eui;
 mod nsec;
 mod nxt;
+mod sig;
 mod time;
 mod uri;
 
@@ -15,7 +16,8 @@ pub use self::eui::{EUI48Addr, EUI64Addr};
 pub use self::name::{DnsName, DnsCanonicalName, DnsCompressedName};
 pub use self::nsec::{NsecTypeBitmap, NextHashedOwnerName};
 pub use self::nxt::NxtTypeBitmap;
+pub use self::sig::OptionalTTL;
 pub use self::text::{ShortText, LongText, UnquotedShortText, RemainingText};
-pub use self::time::{Time, Time48};
+pub use self::time::{Time, TimeStrict, Time48};
 pub use self::types::Type;
 pub use self::uri::UriText;

lib/dnsbox-base/src/common_types/name/name_packet_parser.rs

@@ -78,7 +78,7 @@ pub fn deserialize_name(data: &mut Cursor<Bytes>, accept_compressed: bool) -> Re
 		total_len += 1 + label_len;
 		// max len 255, but there also needs to be an empty label at the end
 		if total_len > 254 { bail!{"DNS name too long"} }
-		check_enough_data!(data, (label_len), "DnsName label");
+		check_enough_data!(data, label_len, "DnsName label");
 		data.advance(label_len);
 	}
 }

lib/dnsbox-base/src/common_types/sig.rs

@@ -0,0 +1,52 @@
+use bytes::Bytes;
+use errors::*;
+use failure::Fail;
+use ser::packet::{DnsPacketData, DnsPacketWriteContext};
+use ser::text::{DnsTextData, DnsTextFormatter, DnsTextContext, next_field};
+use std::fmt;
+use std::io::Cursor;
+
+/// Optional TTL
+///
+/// Always present in wire format, but optional in zone; defaults to TTL
+/// of the RR.
+///
+/// Must be followed by a field that doesn't accept any unsigned 32-bit
+/// integer as text representation (like `TimeStrict` for `SIG`).
+///
+/// If field is missing in zone representation the context must provide
+/// a TTL.
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub struct OptionalTTL(pub u32);
+
+impl DnsPacketData for OptionalTTL {
+	fn deserialize(data: &mut Cursor<Bytes>) -> Result<Self> {
+		Ok(OptionalTTL(DnsPacketData::deserialize(data)?))
+	}
+
+	fn serialize(&self, context: &mut DnsPacketWriteContext, packet: &mut Vec<u8>) -> Result<()> {
+		self.0.serialize(context, packet)
+	}
+}
+
+impl DnsTextData for OptionalTTL {
+	fn dns_parse(context: &DnsTextContext, data: &mut &str) -> ::errors::Result<Self> {
+		let mut data_found = *data;
+		let field = next_field(&mut data_found)?;
+		match field.parse::<u32>() {
+			Ok(ttl) => {
+				*data = data_found;
+				Ok(OptionalTTL(ttl))
+			},
+			Err(e) => {
+				Ok(OptionalTTL(context.last_ttl()
+					.ok_or_else(|| e.context("TTL not available in context, failed parsing optional TTL"))?
+				))
+			},
+		}
+	}
+
+	fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
+		self.0.dns_format(f)
+	}
+}

lib/dnsbox-base/src/common_types/time/mod.rs

@@ -7,9 +7,12 @@ use std::io::Cursor;
 
 mod epoch;
 
-/// timestamp in seconds since epoch (ignoring leap seconds)
+/// Timestamp in seconds since epoch (ignoring leap seconds)
 ///
 /// Is expected to wrap around.
+///
+/// Accepts both YYYYMMDDHHmmSS or an unsigned 32-bit integer in text
+/// form; formatted as YYYYMMDDHHmmSS for now.
 #[derive(Clone, PartialEq, Eq, Debug)]
 pub struct Time(pub u32);
 
@@ -37,7 +40,36 @@ impl DnsTextData for Time {
 
 	fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
 		epoch::Tm::from_epoch(self.0 as i64).unwrap().format_YYYYMMDDHHmmSS(&mut*f.format_field()?)
-		// write!(f, "{}", self.0)
+	}
+}
+
+/// Timestamp in seconds since epoch (ignoring leap seconds)
+///
+/// Is expected to wrap around.
+///
+/// Accepts only YYYYMMDDHHmmSS.
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub struct TimeStrict(pub u32);
+
+impl DnsPacketData for TimeStrict {
+	fn deserialize(data: &mut Cursor<Bytes>) -> Result<Self> {
+		Ok(TimeStrict(DnsPacketData::deserialize(data)?))
+	}
+
+	fn serialize(&self, context: &mut DnsPacketWriteContext, packet: &mut Vec<u8>) -> Result<()> {
+		self.0.serialize(context, packet)
+	}
+}
+
+impl DnsTextData for TimeStrict {
+	fn dns_parse(_context: &DnsTextContext, data: &mut &str) -> ::errors::Result<Self> {
+		let field = next_field(data)?;
+		let tm = epoch::Tm::parse_YYYYMMDDHHmmSS(field)?;
+		Ok(TimeStrict(tm.epoch() as u32))
+	}
+
+	fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
+		epoch::Tm::from_epoch(self.0 as i64).unwrap().format_YYYYMMDDHHmmSS(&mut*f.format_field()?)
 	}
 }
 

lib/dnsbox-base/src/records/powerdns_tests.rs

@@ -80,6 +80,11 @@ fn serialized_answer(rrdata: Box<RRData>) -> Result<Bytes> {
 
 
 fn check(q: Type, text_input: &'static str, canonic: Option<&'static str>, raw: &'static [u8]) {
+	// Make sure the canonic representation is sound itself
+	if let Some(canonic) = canonic {
+		check(q, canonic, None, raw);
+	}
+
 	let canonic = canonic.unwrap_or(text_input);
 
 	let mut context = text::DnsTextContext::new();
@@ -144,6 +149,9 @@ fn test_NS() {
 	);
 }
 
+// missing test_MD
+// missing test_MF
+
 #[test]
 fn test_CNAME() {
 	// local alias
@@ -200,6 +208,9 @@ fn test_SOA() {
 	);
 }
 
+// missing test_MB
+// missing test_MG
+
 #[test]
 fn test_MR() {
 	// BROKEN TESTS (2) (deprecated)
@@ -257,6 +268,8 @@ fn test_HINFO() {
 	);
 }
 
+// missing test_MINFO
+
 #[test]
 fn test_MX() {
 	// local name
@@ -348,6 +361,20 @@ fn test_AFSDB() {
 	);
 }
 
+// missing test_RT
+// missing test_NSAP_PTR
+
+#[test]
+fn test_SIG() {
+	// not supported by powerdns
+	// last ttl is 3600 in this test environment
+	check(types::SIG,
+		"NXT 1 2 19970102030405 19961211100908 2143 foo.nil. AIYADP8d3zYNyQwW2EM4wXVFdslEJcUx/fxkfBeH1El4ixPFhpfHFElxbvKoWmvjDTCm fiYy2X+8XpFjwICHc398kzWsTMKlxovpz2FnCTM=",
+		Some("NXT 1 2 3600 19970102030405 19961211100908 2143 foo.nil. AIYADP8d3zYNyQwW2EM4wXVFdslEJcUx/fxkfBeH1El4ixPFhpfHFElxbvKoWmvjDTCmfiYy2X+8XpFjwICHc398kzWsTMKlxovpz2FnCTM="),
+		b"\x00\x1e\x01\x02\x00\x00\x0e\x10\x32\xcb\x25\xa5\x32\xae\x88\x44\x08\x5f\x03foo\x03nil\x00\x00\x86\x00\x0c\xff\x1d\xdf\x36\x0d\xc9\x0c\x16\xd8\x43\x38\xc1\x75\x45\x76\xc9\x44\x25\xc5\x31\xfd\xfc\x64\x7c\x17\x87\xd4\x49\x78\x8b\x13\xc5\x86\x97\xc7\x14\x49\x71\x6e\xf2\xa8\x5a\x6b\xe3\x0d\x30\xa6\x7e\x26\x32\xd9\x7f\xbc\x5e\x91\x63\xc0\x80\x87\x73\x7f\x7c\x93\x35\xac\x4c\xc2\xa5\xc6\x8b\xe9\xcf\x61\x67\x09\x33"
+	);
+}
+
 #[test]
 fn test_KEY() {
 	// deprecated (and i don't know what i am doing wrong)
@@ -358,6 +385,9 @@ fn test_KEY() {
 	);
 }
 
+// missing test_PX
+// missing test_GPOS
+
 #[test]
 fn test_AAAA() {
 	check(types::AAAA,
@@ -401,6 +431,8 @@ fn test_LOC() {
 	);
 }
 
+// missing test_NXT
+
 #[test]
 fn test_SRV() {
 	// local name
@@ -456,6 +488,9 @@ fn test_CERT() {
 	);
 }
 
+// missing test_A6
+// missing test_DNAME
+
 #[test]
 fn test_DS() {
 	check(types::DS,
@@ -700,6 +735,11 @@ fn test_SMIMEA() {
 	);
 }
 
+// missing test_NINFO
+// missing test_RKEY
+// missing test_CDS
+// missing test_CDNSKEY
+
 #[test]
 fn test_OPENPGPKEY() {
 	check(types::OPENPGPKEY,

lib/dnsbox-base/src/records/structs.rs

@@ -182,9 +182,9 @@ pub struct SIG {
 	// RFC says this can be omitted in text form if it is the same as
 	// the TTL on the SIG record. not supported to be omitted here
 	// (TODO?).
-	original_ttl: u32,
+	original_ttl: OptionalTTL,
-	signature_expiration: u32,
+	signature_expiration: TimeStrict,
-	signature_inception: u32,
+	signature_inception: TimeStrict,
 	key_tag: u16,
 	signers_name: DnsCanonicalName,
 	signature: Base64RemainingBlob,