ParagonIE_Sodium_Compat::crypto_sign_open

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Summery Summery

Validates a signed message then returns the message.

Syntax Syntax

ParagonIE_Sodium_Compat::crypto_sign_open( string $signedMessage, string $publicKey )

Parameters Parameters

$signedMessage

(string) (Required) A signed message

$publicKey

(string) (Required) A public key

Return Return

(string) The original message (if the signature is valid for this public key)

Source Source

File: wp-includes/sodium_compat/src/Compat.php

    public static function crypto_sign_open($signedMessage, $publicKey)
    {
        /* Type checks: */
        ParagonIE_Sodium_Core_Util::declareScalarType($signedMessage, 'string', 1);
        ParagonIE_Sodium_Core_Util::declareScalarType($publicKey, 'string', 2);

        /* Input validation: */
        if (ParagonIE_Sodium_Core_Util::strlen($signedMessage) < self::CRYPTO_SIGN_BYTES) {
            throw new SodiumException('Argument 1 must be at least CRYPTO_SIGN_BYTES long.');
        }
        if (ParagonIE_Sodium_Core_Util::strlen($publicKey) !== self::CRYPTO_SIGN_PUBLICKEYBYTES) {
            throw new SodiumException('Argument 2 must be CRYPTO_SIGN_PUBLICKEYBYTES long.');
        }

        if (self::useNewSodiumAPI()) {
            /**
             * @psalm-suppress InvalidReturnStatement
             * @psalm-suppress FalsableReturnStatement
             */
            return sodium_crypto_sign_open($signedMessage, $publicKey);
        }
        if (self::use_fallback('crypto_sign_open')) {
            return call_user_func('\\Sodium\\crypto_sign_open', $signedMessage, $publicKey);
        }
        if (PHP_INT_SIZE === 4) {
            return ParagonIE_Sodium_Crypto32::sign_open($signedMessage, $publicKey);
        }
        return ParagonIE_Sodium_Crypto::sign_open($signedMessage, $publicKey);
    }

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