From 5ec38d53bea4195bfbdd4b215e3bd0e0e4f3da05 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 06:41:13 +0000 Subject: [PATCH 1/6] Initial plan for issue From c5039b8a349744d61ff06da38c3a88530d5e1817 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 06:45:54 +0000 Subject: [PATCH 2/6] Add ordering documentation for X509Chain.ChainElements property Co-authored-by: jeffhandley <1031940+jeffhandley@users.noreply.github.com> --- .../X509Chain.xml | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml index 7beb89f252b..9598d6f5187 100644 --- a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml +++ b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml @@ -464,9 +464,31 @@ A chain element consists of an object, an structure, and an extra information string. + The `ChainElements` collection is ordered from the end-entity (leaf) certificate at index 0, through any intermediate certificates, to the trust anchor (root certificate) at the final index. This ordering is consistent across all platforms: + - On Windows, this matches the `CERT_CHAIN_CONTEXT` structure where `rgpChain[0]` is the end certificate and `rgpChain[cChain–1]` is the final chain element (root). + - On Linux and macOS, this matches OpenSSL's `X509_STORE_CTX_get0_chain()` which returns a `STACK_OF(X509)` ordered from leaf to root. ## Examples + The following code example demonstrates the ordering of chain elements: + + ```csharp + using var chain = new X509Chain(); + chain.Build(serverCertificate); + + // chain.ChainElements[0] is the leaf (end-entity) certificate + // chain.ChainElements[^1] is the root (trust anchor) certificate + + Console.WriteLine("Certificate chain from leaf to root:"); + for (int i = 0; i < chain.ChainElements.Count; i++) + { + var cert = chain.ChainElements[i].Certificate; + var role = i == 0 ? "Leaf" : + i == chain.ChainElements.Count - 1 ? "Root" : "Intermediate"; + Console.WriteLine($"[{i}] {role}: {cert.Subject}"); + } + ``` + The following code example opens the current user's personal certificate store, allows you to select a certificate, then writes certificate and certificate chain information to the console. The output depends on the certificate you select. :::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/x509chaintest.cs" id="Snippet4"::: From 9ea639b80f8fed49daa36831e2c006f9f268cd59 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 08:06:59 +0000 Subject: [PATCH 3/6] Address code review feedback: move example to separate file and fix punctuation Co-authored-by: gewarren <24882762+gewarren@users.noreply.github.com> --- .../Overview/chainelements-ordering.cs | 25 +++++++++++++++++++ .../X509Chain.xml | 23 +++-------------- 2 files changed, 29 insertions(+), 19 deletions(-) create mode 100644 snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs diff --git a/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs new file mode 100644 index 00000000000..dfa0d3db861 --- /dev/null +++ b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs @@ -0,0 +1,25 @@ +using System; +using System.Security.Cryptography.X509Certificates; + +class ChainElementsOrdering +{ + static void DemonstrateChainElementsOrdering() + { +// + using var chain = new X509Chain(); + chain.Build(serverCertificate); + + // chain.ChainElements[0] is the leaf (end-entity) certificate + // chain.ChainElements[^1] is the root (trust anchor) certificate + + Console.WriteLine("Certificate chain from leaf to root:"); + for (int i = 0; i < chain.ChainElements.Count; i++) + { + var cert = chain.ChainElements[i].Certificate; + var role = i == 0 ? "Leaf" : + i == chain.ChainElements.Count - 1 ? "Root" : "Intermediate"; + Console.WriteLine($"[{i}] {role}: {cert.Subject}"); + } +// + } +} \ No newline at end of file diff --git a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml index 9598d6f5187..ab45050917b 100644 --- a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml +++ b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml @@ -467,27 +467,12 @@ The `ChainElements` collection is ordered from the end-entity (leaf) certificate at index 0, through any intermediate certificates, to the trust anchor (root certificate) at the final index. This ordering is consistent across all platforms: - On Windows, this matches the `CERT_CHAIN_CONTEXT` structure where `rgpChain[0]` is the end certificate and `rgpChain[cChain–1]` is the final chain element (root). - - On Linux and macOS, this matches OpenSSL's `X509_STORE_CTX_get0_chain()` which returns a `STACK_OF(X509)` ordered from leaf to root. + - On Linux and macOS, this matches OpenSSL's `X509_STORE_CTX_get0_chain()`, which returns a `STACK_OF(X509)` ordered from leaf to root. ## Examples - The following code example demonstrates the ordering of chain elements: - - ```csharp - using var chain = new X509Chain(); - chain.Build(serverCertificate); - - // chain.ChainElements[0] is the leaf (end-entity) certificate - // chain.ChainElements[^1] is the root (trust anchor) certificate - - Console.WriteLine("Certificate chain from leaf to root:"); - for (int i = 0; i < chain.ChainElements.Count; i++) - { - var cert = chain.ChainElements[i].Certificate; - var role = i == 0 ? "Leaf" : - i == chain.ChainElements.Count - 1 ? "Root" : "Intermediate"; - Console.WriteLine($"[{i}] {role}: {cert.Subject}"); - } - ``` +The following code example demonstrates the ordering of chain elements: + +:::code language="csharp" source="~/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs" id="Snippet6"::: The following code example opens the current user's personal certificate store, allows you to select a certificate, then writes certificate and certificate chain information to the console. The output depends on the certificate you select. From 0f7708bdf843877db4c7fbc3d23f9f434b00f91b Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 14:57:03 +0000 Subject: [PATCH 4/6] Remove platform implementation details from X509Chain.ChainElements documentation Co-authored-by: vcsjones <361677+vcsjones@users.noreply.github.com> --- .../X509Chain.xml | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml index ab45050917b..6a66282b914 100644 --- a/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml +++ b/xml/System.Security.Cryptography.X509Certificates/X509Chain.xml @@ -464,10 +464,7 @@ A chain element consists of an object, an structure, and an extra information string. - The `ChainElements` collection is ordered from the end-entity (leaf) certificate at index 0, through any intermediate certificates, to the trust anchor (root certificate) at the final index. This ordering is consistent across all platforms: - - - On Windows, this matches the `CERT_CHAIN_CONTEXT` structure where `rgpChain[0]` is the end certificate and `rgpChain[cChain–1]` is the final chain element (root). - - On Linux and macOS, this matches OpenSSL's `X509_STORE_CTX_get0_chain()`, which returns a `STACK_OF(X509)` ordered from leaf to root. + The `ChainElements` collection is ordered from the end-entity (leaf) certificate at index 0, through any intermediate certificates, to the trust anchor (root certificate) at the final index. This ordering is consistent across all platforms. ## Examples The following code example demonstrates the ordering of chain elements: From e9473ea2ccb668b7ec561da34e81e690388a67c2 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 17:13:09 +0000 Subject: [PATCH 5/6] Add access modifiers to chainelements-ordering.cs sample Co-authored-by: bartonjs <10642668+bartonjs@users.noreply.github.com> --- .../X509Chain/Overview/chainelements-ordering.cs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs index dfa0d3db861..be9c721cea3 100644 --- a/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs +++ b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs @@ -1,9 +1,9 @@ using System; using System.Security.Cryptography.X509Certificates; -class ChainElementsOrdering +public class ChainElementsOrdering { - static void DemonstrateChainElementsOrdering() + public static void DemonstrateChainElementsOrdering() { // using var chain = new X509Chain(); From 9ad9817b7ef58c34036755b433610f45636f54bd Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Thu, 19 Jun 2025 19:08:37 +0000 Subject: [PATCH 6/6] Fix undefined serverCertificate variable in chain elements ordering example Co-authored-by: gewarren <24882762+gewarren@users.noreply.github.com> --- .../X509Chain/Overview/chainelements-ordering.cs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs index be9c721cea3..8e0071a11e4 100644 --- a/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs +++ b/snippets/csharp/System.Security.Cryptography.X509Certificates/X509Chain/Overview/chainelements-ordering.cs @@ -3,11 +3,11 @@ public class ChainElementsOrdering { - public static void DemonstrateChainElementsOrdering() + public static void DemonstrateChainElementsOrdering(X509Certificate2 certificate) { // using var chain = new X509Chain(); - chain.Build(serverCertificate); + chain.Build(certificate); // chain.ChainElements[0] is the leaf (end-entity) certificate // chain.ChainElements[^1] is the root (trust anchor) certificate