CAPLfunctionSecurityLocalVerifyEd25519

SecurityLocalVerifyEd25519

CAPL Functions » Security » SecurityLocalVerifyEd25519

Valid for: CANoe DE • CANoe4SW DE

Function Syntax

SecurityLocalVerifyEd25519(byte[] PublicKey, dword PublicKeyLength, byte[] Data, dword DataLength, byte[] Signature, dword SignatureLength, dword& VerificationResult)

Description

Verifies signature of data signed with Ed25519 signing algorithm.

Parameters

• publicKey: The public key to be used for verification.
• publicKeyLength: Size of Public key to be used for signature verification. Expected size is 32 bytes for Ed25519.
• data: Buffer containing the data to be verified.
• dataLength: Size of the buffer to be verified. Maximum size is 65536 bytes.
• signature: Buffer containing the signature.
• signatureLength: Length of the signature, expected size is 64 bytes.
• verificationResult [OUT]: Result of the signature verification.

Return Values

• 1: Success. A value of 1 means that the action was successful.
• <= 0: Error. A value less than or equal to 0 means error.

Example

byte priv[1000];
byte pub[1000];
byte data[1000];
byte signature[64];
dword verify;

dword privSize;
dword pubSize;
dword dataSize;
dword signatureSize;

privSize = elcount(priv);
pubSize = elcount(pub);
dataSize = elcount(data);
signatureSize = elcount(signature);

verify = 0;

write("SecurityLocalGenerateAsymmetricKeyPair Ed25519");
SecurityLocalGenerateAsymmetricKeyPair(1, priv, privSize, pub, pubSize);

SecurityLocalSignEd25519(priv, privSize, data, dataSize, signature, signatureSize);
SecurityLocalVerifyEd25519(pub, pubSize, data, dataSize, signature, signatureSize, verify);

write("VerificationResult result %ld", verify);

SecurityLocalSignEd25519