class ara::crypto::x509::X509DN

The interface ara::crypto::x509::X509DN serves to encapsulate and provide an X.509 Distinguished Name as a serializable data structure within the crypto module. Shared, immutable ownership of instances is realized as std::shared_ptr<const X509DN> via the alias Sptrc [SWS_CRYPT_40401]. The central method ToString() formats the full name according to RFC 4514 and operates thread-safe and without standardized error codes [SWS_CRYPT_40411]. Callers receive the result as ara::core::Result<ara::core::String>, which must be checked for validity prior to further processing.

more ›

Context

Within the module crypto of the AUTOSAR Adaptive Platform, the abstract interface ara::crypto::x509::X509DN represents a Distinguished Name (DN) according to the X.509 standard. Through inheritance from ara::crypto::Serializable, the class is embedded into the type hierarchy as a serializable cryptographic data structure. The primary task of the interface is to encapsulate name structures of certificates, certificate subjects, or certificate issuers on the software side. A central role is played by providing a standardized text representation: according to [SWS_CRYPT_40411], the method ToString() exports the complete Distinguished Name as a string in accordance with the RFC 4514 specification. If the underlying Distinguished Name contains non-standardized attributes, the respective Object Identifier (OID) is used for these attributes [SWS_CRYPT_40411].

Lifecycle

Because ara::crypto::x509::X509DN is an abstract C++ interface with pure virtual methods like ToString(), instantiation is not performed directly by application developers. The payload specifies no public constructor; concrete instances are presumably created by higher-level components or certificate parsers of the cryptographic subsystem. Question Q-108d7589869c7370 (open)

For shared and long-lived access, the interface defines the type specifier Sptrc as an alias for std::shared_ptr<const X509DN> [SWS_CRYPT_40401]. The use of a constant shared pointer emphasizes the ownership and access concept: instances of X509DN are externally immutable. Multiple consumers can safely and statelessly share the same representation of a Distinguished Name without incurring synchronization overhead during read accesses. With respect to concurrency, the central method ToString() is explicitly declared as thread-safe [SWS_CRYPT_40411]. Concurrent invocations via the same shared pointer or across different threads are thus permissible without external locks. In addition, the specification guarantees full exception safety (exception safe) for this call [SWS_CRYPT_40411].

Usage Path

The typical usage path focuses on reading and further processing the formatted Distinguished Name for logging, authentication, or identity verification. An application typically receives a pointer of type ara::crypto::x509::X509DN::Sptrc [SWS_CRYPT_40401].

On this instance, the caller executes the method ToString() [SWS_CRYPT_40411]. The call is made noexcept and returns a ara::core::Result<ara::core::String> [SWS_CRYPT_40411]. Upon successful evaluation, the Result object contains the string formatted according to RFC 4514, for example in the standardized form of attribute-value pairs such as CN=... or using OIDs for proprietary attributes [SWS_CRYPT_40411]. The application can subsequently extract the resulting string and use it for application-specific checks, comparisons, or audit logs.

Error Scenarios

When interacting with ara::crypto::x509::X509DN, error handling is characterized by a clear, minimal design. Although ToString() uses the return type ara::core::Result<ara::core::String>, the specification explicitly stipulates that the function defines no standardized error codes [SWS_CRYPT_40411]. This means that in the regular specification context, no functional rejection reasons or validation errors are specified for the serialization process.

Because the function is also specified as noexcept and exception safe [SWS_CRYPT_40411], synchronous C++ exceptions are ruled out. If error states nevertheless occur within the returned ara::core::Result, they are presumably attributable to platform- or implementation-specific causes such as memory bottlenecks during allocation of the result string. Question Q-10477dd7d77e3b78 (open) Callers must therefore always verify whether the Result contains a valid value or an error before unwrapping the value, even though AUTOSAR defines no domain-specific error constants for this.