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defaults to Curve25519\n$ecc = new EasyECC();\n\n// Get a keypair\n$alice_sk = $ecc-\u003egeneratePrivateKey();\n$alice_pk = $alice_sk-\u003egetPublicKey();\n\n// Signing a message (with PEM-formatted signatures):\n$message = 'This is extremely simple to use correctly.';\n$signature = $ecc-\u003esign($message, $alice_sk);\n\nif (!$ecc-\u003everify($message, $alice_pk, $signature)) {\n    throw new Exception('Signature validation failed');\n}\n\n// Let's do a key exchange:\n$bob_sk = $ecc-\u003egeneratePrivateKey();\n$bob_pk = $alice_sk-\u003egetPublicKey();\n\n$alice_to_bob = $ecc-\u003ekeyExchange($alice_sk, $bob_pk, true);\n$bob_to_alice = $ecc-\u003ekeyExchange($bob_sk, $alice_pk, false);\n```\n\n### Other Easy-ECC Modes\n\n#### secp256k1 + SHA256\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\n\n$ecc = new EasyECC('K256');\n```\n\n#### NIST P256 + SHA256\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\n\n$ecc = new EasyECC('P256');\n```\n\n#### NIST P384 + SHA384\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\n\n$ecc = new EasyECC('P384');\n```\n\n#### NIST P521 + SHA512\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\n\n$ecc = new EasyECC('P521');\n```\n\n### ECDSA-Specific Features\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\nuse ParagonIE\\EasyECC\\ECDSA\\{PublicKey, SecretKey};\n\n// Generate an instance\n$ecc = new EasyECC('P256');\n\n// Get a keypair\n/** @var SecretKey $alice_sk */\n$alice_sk = $ecc-\u003egeneratePrivateKey();\n/** @var PublicKey $alice_pk */\n$alice_pk = $alice_sk-\u003egetPublicKey();\n\n// Serialize as PEM (for OpenSSL compatibility):\n$alice_sk_pem = $alice_sk-\u003eexportPem();\n$alice_pk_pem = $alice_pk-\u003eexportPem();\n\n// Serialize public key as compressed point (for brevity):\n$alice_pk_cpt = $alice_pk-\u003etoString();\n\n$message = 'This is extremely simple to use correctly.';\n// Signing a message (with IEEE-P1363-formatted signatures):\n$signature = $ecc-\u003esign($message, $alice_sk, true);\nif (!$ecc-\u003everify($message, $alice_pk, $signature, true)) {\n    throw new Exception('Signature validation failed');\n}\n\n// Let's do a key exchange:\n$bob_sk = $ecc-\u003egeneratePrivateKey();\n$bob_pk = $alice_sk-\u003egetPublicKey();\n\n$alice_to_bob = $ecc-\u003ekeyExchange($alice_sk, $bob_pk, true);\n$bob_to_alice = $ecc-\u003ekeyExchange($bob_sk, $alice_pk, false);\n```\n\n### Asymmetric Encryption\n\nWe provide an interface that you can implement for the underlying symmetric\ncryptography to suit your needs. This library provides a built-in integration\nfor [Defuse's PHP encryption library](https://github.com/defuse/php-encryption).\n\n```php\n\u003c?php\nuse ParagonIE\\EasyECC\\EasyECC;\nuse ParagonIE\\EasyECC\\Integration\\Defuse;\nuse Mdanter\\Ecc\\Crypto\\Key\\{\n    PublicKeyInterface,\n    PrivateKeyInterface\n};\n\n/**\n * @var EasyECC $ecc\n * @var PrivateKeyInterface $secretKey\n * @var PublicKeyInterface $publicKey\n */\n\n// Let's load the integration (inject your EasyECC instance):\n$defuse = new Defuse($ecc);\n\n// You can seal/unseal messages (anonymous public-key encryption):\n$superSecret = 'This is a secret message';\n$sealed = $defuse-\u003eseal($superSecret, $publicKey);\n$opened = $defuse-\u003eunseal($sealed, $secretKey);\n\n// Or you can encrypt between two keypairs:\n$otherSecret = $ecc-\u003egeneratePrivateKey();\n$otherPublic = $otherSecret-\u003egetPublicKey();\n$encrypted = $defuse-\u003easymmetricEncrypt($superSecret, $secretKey, $otherPublic);\n$decrypted = $defuse-\u003easymmetricDecrypt($encrypted, $otherSecret, $publicKey);\n```\n\n## Support Contracts\n\nIf your company uses this library in their products or services, you may be\ninterested in [purchasing a support contract from Paragon Initiative Enterprises](https://paragonie.com/enterprise).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fparagonie%2Feasy-ecc","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fparagonie%2Feasy-ecc","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fparagonie%2Feasy-ecc/lists"}