fix(rust/signed-doc): Add ProblemReport to Catalyst sign document

rust/signed_doc/Cargo.toml

@@ -21,7 +21,7 @@ brotli = "7.0.0"
 ed25519-dalek = { version = "2.1.1", features = ["pem", "rand_core"] }
 uuid = { version = "1.11.0", features = ["v4", "v7", "serde"] }
 hex = "0.4.3"
-thiserror = "2.0.9"
+strum = { version = "0.26.3", features = ["derive"] }
 
 [dev-dependencies]
 clap = { version = "4.5.23",  features = ["derive", "env"] }

rust/signed_doc/examples/mk_signed_doc.rs

@@ -8,7 +8,7 @@ use std::{
     path::PathBuf,
 };
 
-use catalyst_signed_doc::{Builder, CatalystSignedDocument, Decode, Decoder, KidUri, Metadata};
+use catalyst_signed_doc::{Builder, CatalystSignedDocument, KidUri, Metadata};
 use clap::Parser;
 use coset::CborSerializable;
 use ed25519_dalek::{ed25519::signature::Signer, pkcs8::DecodePrivateKey};
@@ -107,7 +107,8 @@ fn decode_signed_doc(cose_bytes: &[u8]) {
         cose_bytes.len(),
         hex::encode(cose_bytes)
     );
-    match CatalystSignedDocument::decode(&mut Decoder::new(cose_bytes), &mut ()) {
+
+    match CatalystSignedDocument::new(cose_bytes) {
         Ok(cat_signed_doc) => {
             println!("This is a valid Catalyst Document.");
             println!("{cat_signed_doc}");

rust/signed_doc/src/lib.rs

@@ -2,23 +2,24 @@
 
 mod builder;
 mod content;
-mod error;
 mod metadata;
 mod signature;
+mod utils;
 
 use std::{
     convert::TryFrom,
-    fmt::{Display, Formatter},
+    fmt::{self, Display, Formatter},
     sync::Arc,
 };
 
-use anyhow::anyhow;
 pub use builder::Builder;
+use catalyst_types::problem_report::ProblemReport;
 pub use content::Content;
 use coset::{CborSerializable, Header};
 pub use metadata::{DocumentRef, ExtraFields, Metadata, UuidV4, UuidV7};
 pub use minicbor::{decode, encode, Decode, Decoder, Encode};
 pub use signature::{KidUri, Signatures};
+use utils::context::SignDocContext;
 
 /// Inner type that holds the Catalyst Signed Document with parsing errors.
 #[derive(Debug, Clone)]
@@ -64,7 +65,55 @@ impl From<InnerCatalystSignedDocument> for CatalystSignedDocument {
     }
 }
 
+/// Catalyst Signed Document Error
+#[derive(Debug)]
+pub struct CatalystSignedDocError {
+    /// List of errors during processing.
+    report: ProblemReport,
+    /// Actual error.
+    error: anyhow::Error,
+}
+
+impl fmt::Display for CatalystSignedDocError {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let report_json = serde_json::to_string(&self.report)
+            .unwrap_or_else(|_| String::from("Failed to serialize ProblemReport"));
+
+        write!(
+            fmt,
+            "CatalystSignedDocError {{ error: {}, report: {} }}",
+            self.error, report_json
+        )
+    }
+}
+
 impl CatalystSignedDocument {
+    /// Create a new Catalyst Signed Document from a COSE Sign document bytes.
+    ///
+    /// # Arguments
+    ///
+    /// * `cose_bytes` - COSE Sign document bytes.
+    ///
+    /// # Returns
+    ///
+    /// A new Catalyst Signed Document.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the COSE Sign document bytes are invalid or decode error.
+    pub fn new(cose_bytes: &[u8]) -> anyhow::Result<Self, CatalystSignedDocError> {
+        let error_report = ProblemReport::new("Catalyst Signed Document");
+        let mut ctx = SignDocContext { error_report };
+        let decoded: CatalystSignedDocument =
+            minicbor::decode_with(cose_bytes, &mut ctx).map_err(|e| {
+                CatalystSignedDocError {
+                    report: ctx.error_report,
+                    error: e.into(),
+                }
+            })?;
+        Ok(decoded)
+    }
+
     // A bunch of getters to access the contents, or reason through the document, such as.
 
     /// Return Document Type `UUIDv4`.
@@ -104,8 +153,8 @@ impl CatalystSignedDocument {
     }
 }
 
-impl Decode<'_, ()> for CatalystSignedDocument {
-    fn decode(d: &mut Decoder<'_>, (): &mut ()) -> Result<Self, decode::Error> {
+impl Decode<'_, SignDocContext> for CatalystSignedDocument {
+    fn decode(d: &mut Decoder<'_>, ctx: &mut SignDocContext) -> Result<Self, decode::Error> {
         let start = d.position();
         d.skip()?;
         let end = d.position();
@@ -115,40 +164,67 @@ impl Decode<'_, ()> for CatalystSignedDocument {
             .ok_or(minicbor::decode::Error::end_of_input())?;
 
         let cose_sign = coset::CoseSign::from_slice(cose_bytes).map_err(|e| {
+            ctx.error_report.invalid_value(
+                "COSE sign document bytes",
+                &format!("{:?}", &cose_bytes),
+                &format!("Cannot convert bytes to CoseSign {e:?}"),
+                "Creating COSE Sign document",
+            );
             minicbor::decode::Error::message(format!("Invalid COSE Sign document: {e}"))
         })?;
 
-        let mut errors = Vec::new();
-
-        let metadata = Metadata::try_from(&cose_sign.protected).map_or_else(
-            |e| {
-                errors.extend(e.0 .0);
-                None
-            },
-            Some,
-        );
-        let signatures = Signatures::try_from(&cose_sign.signatures).map_or_else(
-            |e| {
-                errors.extend(e.0 .0);
-                None
-            },
-            Some,
-        );
+        let metadata = Metadata::from_protected_header(&cose_sign.protected, &ctx.error_report)
+            .map_or_else(
+                |e| {
+                    ctx.error_report.conversion_error(
+                        "COSE sign protected header",
+                        &format!("{:?}", &cose_sign.protected),
+                        &format!("Expected Metadata: {e:?}"),
+                        "Converting COSE Sign protected header to Metadata",
+                    );
+                    None
+                },
+                Some,
+            );
+        let signatures = Signatures::from_cose_sig(&cose_sign.signatures, &ctx.error_report)
+            .map_or_else(
+                |e| {
+                    ctx.error_report.conversion_error(
+                        "COSE sign signatures",
+                        &format!("{:?}", &cose_sign.signatures),
+                        &format!("Expected Signatures {e:?}"),
+                        "Converting COSE Sign signatures to Signatures",
+                    );
+                    None
+                },
+                Some,
+            );
 
         if cose_sign.payload.is_none() {
-            errors.push(anyhow!("Document Content is missing"));
+            ctx.error_report
+                .missing_field("COSE Sign Payload", "Missing document content (payload)");
         }
 
         match (cose_sign.payload, metadata, signatures) {
             (Some(payload), Some(metadata), Some(signatures)) => {
                 let content = Content::from_encoded(
-                    payload,
+                    payload.clone(),
                     metadata.content_type(),
                     metadata.content_encoding(),
                 )
                 .map_err(|e| {
-                    errors.push(anyhow!("Invalid Document Content: {e}"));
-                    minicbor::decode::Error::message(error::Error::from(errors))
+                    ctx.error_report.invalid_value(
+                        "Document Content",
+                        &format!(
+                            "Given value {:?}, {:?}, {:?}",
+                            payload,
+                            metadata.content_type(),
+                            metadata.content_encoding()
+                        ),
+                        &format!("{e:?}"),
+                        "Creating document content",
+                    );
+                    minicbor::decode::Error::message("Failed to create Document Content")
                 })?;
 
                 Ok(InnerCatalystSignedDocument {
@@ -158,7 +234,11 @@ impl Decode<'_, ()> for CatalystSignedDocument {
                 }
                 .into())
             },
-            _ => Err(minicbor::decode::Error::message(error::Error::from(errors))),
+            _ => {
+                Err(minicbor::decode::Error::message(
+                    "Failed to decode Catalyst Signed Document",
+                ))
+            },
         }
     }
 }
@@ -238,8 +318,8 @@ mod tests {
 
         let mut bytes = Vec::new();
         minicbor::encode_with(doc, &mut bytes, &mut ()).unwrap();
-        let decoded: CatalystSignedDocument =
-            minicbor::decode_with(bytes.as_slice(), &mut ()).unwrap();
+
+        let decoded = CatalystSignedDocument::new(&bytes).unwrap();
 
         assert_eq!(decoded.doc_type(), uuid_v4);
         assert_eq!(decoded.doc_id(), uuid_v7);

rust/signed_doc/src/metadata/algorithm.rs

@@ -1,7 +1,9 @@
 //! Cryptographic Algorithm in COSE SIGN protected header.
 
+use strum::VariantArray;
+
 /// Cryptography Algorithm.
-#[derive(Copy, Clone, Debug, PartialEq, serde::Deserialize)]
+#[derive(Copy, Clone, Debug, PartialEq, serde::Deserialize, VariantArray)]
 pub enum Algorithm {
     /// `EdDSA`
     EdDSA,
@@ -25,7 +27,12 @@ impl TryFrom<coset::iana::Algorithm> for Algorithm {
     fn try_from(value: coset::iana::Algorithm) -> Result<Self, Self::Error> {
         match value {
             coset::iana::Algorithm::EdDSA => Ok(Self::EdDSA),
-            _ => anyhow::bail!("Unsupported algorithm: {value:?}"),
+            _ => {
+                anyhow::bail!(
+                    "Unsupported algorithm: {value:?}, Supported only: {:?}",
+                    Algorithm::VARIANTS
+                )
+            },
         }
     }
 }

rust/signed_doc/src/metadata/content_type.rs

@@ -7,9 +7,10 @@ use std::{
 
 use coset::iana::CoapContentFormat;
 use serde::{de, Deserialize, Deserializer};
+use strum::VariantArray;
 
 /// Payload Content Type.
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, VariantArray)]
 pub enum ContentType {
     /// 'application/cbor'
     Cbor,
@@ -33,7 +34,12 @@ impl FromStr for ContentType {
         match s {
             "cbor" => Ok(Self::Cbor),
             "json" => Ok(Self::Json),
-            _ => anyhow::bail!("Unsupported Content Type: {s:?}"),
+            _ => {
+                anyhow::bail!(
+                    "Unsupported Content Type: {s:?}, Supported only: {:?}",
+                    ContentType::VARIANTS
+                )
+            },
         }
     }
 }
@@ -62,7 +68,12 @@ impl TryFrom<&coset::ContentType> for ContentType {
         let content_type = match value {
             coset::ContentType::Assigned(CoapContentFormat::Json) => ContentType::Json,
             coset::ContentType::Assigned(CoapContentFormat::Cbor) => ContentType::Cbor,
-            _ => anyhow::bail!("Unsupported Content Type {value:?}"),
+            _ => {
+                anyhow::bail!(
+                    "Unsupported Content Type {value:?}, Supported only: {:?}",
+                    ContentType::VARIANTS
+                )
+            },
         };
         Ok(content_type)
     }