chilkat.EdDSA

Selects the Ed25519 signature variant used by SignBdENC and VerifyBdENC. The default is Ed25519.

Gets or sets the context bytes used by the Ed25519ctx and Ed25519ph signature variants. Supply the bytes as a hexadecimal string. The default is an empty string.

A context may contain at most 255 bytes, which corresponds to at most 510 hexadecimal characters. The same context bytes must be supplied byte-for-byte when verifying the signature. An invalid hexadecimal value or an oversized context causes the signing or verification operation to fail.

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

• A timeout property set to 0, indicating an infinite timeout.
• A hang occurring within an event callback in the application code.
• An internal bug in the Chilkat code causing the hang.

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages. Note: This property does not apply to methods that return integer values or to boolean-returning methods where the boolean does not indicate success or failure.

If set to true, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version of the component/library, such as "10.1.0"

Generates a new Ed25519 key pair using prng as the source of cryptographically secure random bytes. On success, the generated private key and its corresponding public key are stored in the existing PrivateKey object passed in priv_key.

Returns true on success and false on failure. If the method fails, inspect LastErrorText for details.

Returns true on success, nil, err on failure. The second return value, err, is the object's last_error_text; wrap the call in assert() to raise an error instead.

Computes a 32-byte X25519 shared secret from the private key in privkey and the peer's public key in pubkey. The resulting bytes are returned as text using the binary encoding named by encoding, such as hex, hexlower, or base64.

Each participant supplies its own private key and the other participant's public key. When Alice computes the secret from Alice's private key and Bob's public key, and Bob computes it from Bob's private key and Alice's public key, both obtain the same result.

This is a string-returning method. Check LastMethodSuccess before using the returned value; on failure, inspect LastErrorText.

Returns the string, or nil, err on failure (or when nothing is found). The second return value, err, is the object's last_error_text; wrap the call in assert() to raise an error instead.

Creates an EdDSA signature over the exact byte sequence contained in bd, using the Ed25519 private key in privkey. The 64-byte signature is returned as text using the binary encoding named by encoding, such as hex, hexlower, or base64.

The selected Algorithm and Context properties determine whether the operation uses Ed25519, Ed25519ctx, or Ed25519ph. For Ed25519ph, pass the original message bytes in bd; Chilkat performs the required SHA-512 prehash as part of the Ed25519ph operation.

This is a string-returning method. Check LastMethodSuccess before using the returned value; on failure, inspect LastErrorText.

Returns the string, or nil, err on failure (or when nothing is found). The second return value, err, is the object's last_error_text; wrap the call in assert() to raise an error instead.

Verifies the encoded EdDSA signature in encoded_sig against the exact byte sequence contained in bd, using the Ed25519 public key in pubkey. enocding names the binary encoding of encoded_sig, such as hex, hexlower, or base64.

The verifier must use the same Algorithm and Context values that were used to create the signature. Any change to the message, signature, public key, algorithm variant, or context causes verification to fail.

Returns true only when the signature is valid. Returns false for an invalid signature or an operational error, such as malformed encoded input, an unsupported encoding, or an unsuitable key. Inspect LastErrorText for diagnostic information.

Returns true on success, nil, err on failure. The second return value, err, is the object's last_error_text; wrap the call in assert() to raise an error instead.