Function deserialize_32_bytes

pub fn deserialize_32_bytes<'de, D>(
    deserializer: D,
) -> Result<[u8; 32], D::Error>
where
    D: Deserializer<'de>,

Custom serialization for 32-byte arrays (challenge params, public keys)

Deserializes a byte sequence back into a fixed-size 32-byte array, with strict length validation to ensure cryptographic correctness.

Arguments

• deserializer: The serde deserializer instance that will handle the actual deserialization from the source format.

Returns

• Result<[u8; 32], D::Error>: A 32-byte array on success, or a deserialization error if the operation fails or the byte length is incorrect.

Type Parameters

• D: The deserializer type that implements the Deserializer trait.

Errors

• Returns a custom error if the deserialized byte sequence is not exactly 32 bytes long, (Requirement of the cryptographic primitive in use.)

Example

use ironshield_types::deserialize_32_bytes;

#[derive(serde::Deserialize)]
struct CryptoKey {
    #[serde(deserialize_with = "deserialize_32_bytes")]
    public_key: [u8; 32],
}