---
title: "sec_protocol_metadata_access_supported_signature_algorithms(_:_:)"
framework: security
role: symbol
role_heading: Function
path: "security/sec_protocol_metadata_access_supported_signature_algorithms(_:_:)"
---

# sec_protocol_metadata_access_supported_signature_algorithms(_:_:)

## Declaration

```swift
func sec_protocol_metadata_access_supported_signature_algorithms(_ metadata: sec_protocol_metadata_t, _ handler: @escaping (UInt16) -> Void) -> Bool
```

## Parameters

- `metadata`: A sec_protocol_metadata_t instance.
- `handler`: A block to invoke one or more times with OCSP data

## Return Value

Return Value Returns true if the supported signature list was accessible, false otherwise.

## Discussion

Discussion Get the signature algorithms supported by the peer. Clients may call this in response to a challenge block.