Adding from PEM stack for CA chain functionality and caching turin certs

Turin certs are a different size from previous generation certificates. Adding those certs to our cert cache. When requesting certificates from the KDS, those certificates will come as a pem stack. Adding the ability to generate a ca Chain from a pem stack, that way cert size is not a concern. Also adding testing for this new functionality. Signed-off-by: DGonzalezVillal <[email protected]>
virtee · Nov 8, 2024 · c4e9b81 · c4e9b81
1 parent 6ee97c3
commit c4e9b81
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diff --git a/src/certs/snp/builtin/mod.rs b/src/certs/snp/builtin/mod.rs
@@ -8,4 +8,7 @@ pub mod genoa;
 /// Milan generation.
 pub mod milan;
 
+/// TURIN generation
+pub mod turin;
+
 use super::*;
diff --git a/src/certs/snp/builtin/turin/ark.pem b/src/certs/snp/builtin/turin/ark.pem
@@ -0,0 +1,37 @@
+-----BEGIN CERTIFICATE-----
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+zpacMwFusA==
+-----END CERTIFICATE-----
diff --git a/src/certs/snp/builtin/turin/ask.pem b/src/certs/snp/builtin/turin/ask.pem
@@ -0,0 +1,37 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/src/certs/snp/builtin/turin/mod.rs b/src/certs/snp/builtin/turin/mod.rs
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: Apache-2.0
+
+use super::*;
+
+/// The public TURIN ARK certificate (PEM-encoded).
+pub const ARK: &[u8] = include_bytes!("ark.pem");
+
+/// The public TURIN ASK certificate (PEM-encoded).
+pub const ASK: &[u8] = include_bytes!("ask.pem");
+
+/// Get the TURIN ARK Certificate.
+pub fn ark() -> Result<Certificate> {
+    Certificate::from_pem(ARK)
+}
+
+/// Get the TURIN ASK Certificate.
+pub fn ask() -> Result<Certificate> {
+    Certificate::from_pem(ASK)
+}
+
+mod tests {
+    #[test]
+    fn ark_self_signed() {
+        use super::*;
+
+        let ark = ark().unwrap();
+
+        (&ark, &ark).verify().unwrap();
+    }
+
+    #[test]
+    fn ark_signs_ask() {
+        use super::*;
+
+        let ark = ark().unwrap();
+        let ask = ask().unwrap();
+
+        (&ark, &ask).verify().unwrap();
+    }
+}
diff --git a/src/certs/snp/ca/mod.rs b/src/certs/snp/ca/mod.rs
@@ -118,6 +118,18 @@ impl Chain {
             ask: Certificate::from_der(ask)?,
         })
     }
+
+    #[cfg(feature = "openssl")]
+    /// Deserialize the certificates from a PEM stack to a CA chain.
+    pub fn from_pem_bytes(stack: &[u8]) -> Result<Self> {
+        let certificates = X509::stack_from_pem(stack)?;
+        let ark_cert = &certificates[1];
+        let ask_cert = &certificates[0];
+        Ok(Self {
+            ark: ark_cert.into(),
+            ask: ask_cert.into(),
+        })
+    }
 }
 
 mod tests {

diff --git a/tests/certs.rs b/tests/certs.rs
@@ -28,8 +28,17 @@ mod snp {
 
     const TEST_MILAN_VCEK_DER: &[u8] = include_bytes!("certs_data/vcek_milan.der");
 
+    #[cfg(feature = "openssl")]
+    const TEST_TURIN_VCEK_DER: &[u8] = include_bytes!("certs_data/vcek_turin.der");
+
     const TEST_MILAN_ATTESTATION_REPORT: &[u8] = include_bytes!("certs_data/report_milan.hex");
 
+    #[cfg(feature = "openssl")]
+    const TEST_MILAN_CA: &[u8] = include_bytes!("certs_data/cert_chain_milan");
+
+    #[cfg(feature = "openssl")]
+    const TEST_TURIN_CA: &[u8] = include_bytes!("certs_data/cert_chain_turin");
+
     #[test]
     fn milan_chain() {
         let ark = milan::ark().unwrap();
@@ -101,4 +110,34 @@ mod snp {
 
         assert_eq!((&chain, &report).verify().ok(), None);
     }
+
+    #[cfg(feature = "openssl")]
+    #[test]
+    fn milan_ca_stack() {
+        let vcek = Certificate::from_der(TEST_MILAN_VCEK_DER).unwrap();
+
+        let ca = ca::Chain::from_pem_bytes(TEST_MILAN_CA).unwrap();
+
+        let chain = Chain {
+            ca,
+            vek: vcek.clone(),
+        };
+
+        assert_eq!(chain.verify().ok(), Some(&vcek));
+    }
+
+    #[cfg(feature = "openssl")]
+    #[test]
+    fn turin_ca_stack() {
+        let vcek = Certificate::from_der(TEST_TURIN_VCEK_DER).unwrap();
+
+        let ca = ca::Chain::from_pem_bytes(TEST_TURIN_CA).unwrap();
+
+        let chain = Chain {
+            ca,
+            vek: vcek.clone(),
+        };
+
+        assert_eq!(chain.verify().ok(), Some(&vcek));
+    }
 }
diff --git a/tests/certs_data/cert_chain_milan b/tests/certs_data/cert_chain_milan
@@ -0,0 +1,74 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/certs_data/cert_chain_turin b/tests/certs_data/cert_chain_turin
@@ -0,0 +1,74 @@
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+-----END CERTIFICATE-----
diff --git a/tests/certs_data/vcek_turin.der b/tests/certs_data/vcek_turin.der