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Expose signature string (RFC 5280 4.1.2.3) #36

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Expose signature string (RFC 5280 4.1.2.3) #36

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95a0975
Expose signature field which differs from signature Value
Jan 30, 2023
ab59ad0
Merge branch 'expose-signature-field'
Jan 30, 2023
dfefe3c
Adapt to extract correct inner and outer signature algorithm information
Feb 20, 2023
08ca61d
Fix build error
Feb 20, 2023
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41 changes: 30 additions & 11 deletions ASN1Decoder/X509Certificate.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -194,24 +194,43 @@ public class X509Certificate: CustomStringConvertible {
return block1[X509BlockPosition.dateValidity]?.sub(1)?.value as? Date
}

/// Gets the signature algorithm OID, which should contain the same OID as in
/// - See: RFC 5280 4.1.1.2
public var signatureAlgorithmOID: String? {
return asn1[0].sub(1)?.sub(0)?.value as? String
}

/// Gets the signature algorithm name, which should contain the same OID as in
/// - See: RFC 5280 4.1.1.2
public var signatureAlgorithmName: String? {
return OID.description(of: signatureAlgorithmOID ?? "")
}

/// Gets the signature algorithm parameters
/// - See: RFC 5280 4.1.1.2
public var signatureAlgorithmParams: Data? {
return asn1[0].sub(1)?.sub(1)?.rawValue
}

/// Gets the signature value (the raw signature bits) from the certificate.
public var signature: Data? {
public var signatureValue: Data? {
return asn1[0].sub(2)?.value as? Data
}

/// Gets the signature algorithm name for the certificate signature algorithm.
public var sigAlgName: String? {
return OID.description(of: sigAlgOID ?? "")
/// Gets the signature algorithm OID string from the inner tbs Certificate.
/// - See: RFC 5280 4.1.2.3
public var innerSignatureAlgorithmOID: String? {
return block1[X509BlockPosition.signatureAlg]?.sub(0)?.value as? String
}

/// Gets the signature algorithm OID string from the certificate.
public var sigAlgOID: String? {
return block1.sub(2)?.sub(0)?.value as? String
/// Gets the signature algorithm name for the inner tbs certificate signature algorithm.
public var innerSignatureAlgorithmName: String? {
return OID.description(of: innerSignatureAlgorithmOID ?? "")
}

/// Gets the DER-encoded signature algorithm parameters from this certificate's signature algorithm.
public var sigAlgParams: Data? {
return nil
/// Gets the DER-encoded signature algorithm parameters from this inner tbs certificate's signature algorithm.
public var innerSignatureAlgorithmParameters: Data? {
return block1[X509BlockPosition.signatureAlg]?.sub(1)?.rawValue
}

/**
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