<!--
{
  "availability" : [
    "iOS: 13.0.0 -",
    "iPadOS: 13.0.0 -",
    "macCatalyst: 13.0.0 -",
    "macOS: 10.15.0 -",
    "tvOS: 13.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CryptoKit",
  "identifier" : "/documentation/CryptoKit/P256/Signing/ECDSASignature",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Apple CryptoKit",
      "CryptoKit"
    ],
    "preciseIdentifier" : "s:9CryptoKit4P256O7SigningO14ECDSASignatureV"
  },
  "title" : "P256.Signing.ECDSASignature"
}
-->

# P256.Signing.ECDSASignature

A P-256 elliptic curve digital signature algorithm (ECDSA) signature.

```
struct ECDSASignature
```

## Topics

### Creating a signature

[`init(derRepresentation:)`](/documentation/CryptoKit/P256/Signing/ECDSASignature/init(derRepresentation:))

Creates a P-256 digital signature from a Distinguished Encoding
Rules (DER) encoded representation.

[`init(rawRepresentation:)`](/documentation/CryptoKit/P256/Signing/ECDSASignature/init(rawRepresentation:))

Creates a P-256 digital signature from a raw representation.

### Representing the signature

[`derRepresentation`](/documentation/CryptoKit/P256/Signing/ECDSASignature/derRepresentation)

A Distinguished Encoding Rules (DER) encoded representation of a
P-256 digital signature.

[`rawRepresentation`](/documentation/CryptoKit/P256/Signing/ECDSASignature/rawRepresentation)

A raw data representation of a P-256 digital signature.

## Relationships

### Conforms To

[`ContiguousBytes`](/documentation/Foundation/ContiguousBytes)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)