Commitments

Use decrypt-cc20p1305 to perform decryption of a CIPHERTEXT using the CHACHA20-POLY1305 Authenticated Encryption with Associated Data (AEAD) construction described in IETF RFC 7539.

To perform decryption of a CIPHERTEXT using CHACHA20-POLY1305, use the following syntax:

(decrypt-cc20p1305 CIPHERTEXT NONCE AAD MAC PUBLIC-KEY SECRET-KEY)

Use the following arguments to specify the inputs for the decrypt-cc20p1305 Pact function:

The decrypt-cc20p1305 function returns the decrypted plaintext as an unpadded base64URL string.

The following example demonstrates the decrypt-cc20p1305 function:

In this example, decrypt-cc20p1305 is used to decrypt the ciphertext "aGVsbG8gd29ybGQh" using CHACHA20-POLY1305 with the specified nonce, additional authentication data (AAD), authentication tag (MAC), public key, and secret key. The function returns the decrypted plaintext as an unpadded base64URL string.

The validate-keypair function enforces that the Curve25519 keypair composed of the public key (PUBLIC) and the private key (SECRET) provided as base-16 strings of length 32 match each other.

To validate a Curve25519 keypair, use the following syntax:

(validate-keypair PUBLIC SECRET)

Use the following arguments to specify the public key and the private key for validation using the validate-keypair Pact function.

The validate-keypair function returns a boolean value indicating whether the provided keypair matches.

The following example demonstrates the usage of the validate-keypair function within a Pact script. It validates that the Curve25519 keypair composed of the public key pubkey and the private key privkey match each other:

This example illustrates how to use the validate-keypair function to ensure that a given public and private key pair match in Pact, verifying their integrity.