CryptoUtils class

Helper class for cryptographic operations

Constructors

CryptoUtils()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

addPKCS7Padding(Uint8List bytes, int blockSizeBytes) → Uint8List
Adds a PKCS7 / PKCS5 padding to the given bytes and blockSizeBytes
ecPrivateKeyFromDerBytes(Uint8List bytes, {bool pkcs8 = false, ECDomainParameters? parameters}) → ECPrivateKey
Decode the given bytes into an ECPrivateKey.
ecPrivateKeyFromPem(String pem) → ECPrivateKey
Decode a ECPrivateKey from the given pem String.
ecPublicKeyFromDerBytes(Uint8List bytes, {ECDomainParameters? parameters}) → ECPublicKey
Decode the given bytes into an ECPublicKey.
ecPublicKeyFromPem(String pem) → ECPublicKey
Decode a ECPublicKey from the given pem String.
ecSign(ECPrivateKey privateKey, Uint8List dataToSign, {String algorithmName = 'SHA-1/ECDSA'}) → ECSignature
Signing the given dataToSign with the given privateKey.
ecSignatureFromBase64(String b64) → ECSignature
Converts a base64 DER encoded string to an ECSignature. The der encoded content must follow the following structure.
ecSignatureFromDerBytes(Uint8List data) → ECSignature
Converts the given DER bytes to an ECSignature. The der encoded content must follow the following structure.
ecSignatureToBase64(ECSignature signature) → String
Convert ECSignature signature to DER encoded base64 string.
ecVerify(ECPublicKey publicKey, Uint8List signedData, ECSignature signature, {String algorithm = 'SHA-1/ECDSA'}) → bool
Verifying the given signedData with the given publicKey and the given signature. Will return true if the given signature matches the signedData.
ecVerifyBase64(ECPublicKey publicKey, Uint8List origData, String signature, {String algorithm = 'SHA-1/ECDSA'}) → bool
Verifying the given signedData with the given publicKey and the given signature in base64. Will return true if the given signature matches the signedData.
encodeEcPrivateKeyToPem(ECPrivateKey ecPrivateKey) → String
Enode the given elliptic curve publicKey to PEM format.
encodeEcPublicKeyToPem(ECPublicKey publicKey) → String
Enode the given elliptic curve publicKey to PEM format.
encodePrivateEcdsaKeyToPkcs8(ECPrivateKey privateKey) → String
Encode a private ECDSA key to PKCS8 format
encodeRSAPrivateKeyToPem(RSAPrivateKey rsaPrivateKey) → String
Enode the given rsaPrivateKey to PEM format using the PKCS#8 standard.
encodeRSAPrivateKeyToPemPkcs1(RSAPrivateKey rsaPrivateKey) → String
Enode the given rsaPrivateKey to PEM format using the PKCS#1 standard.
encodeRSAPublicKeyToPem(RSAPublicKey publicKey) → String
Enode the given publicKey to PEM format using the PKCS#8 standard.
encodeRSAPublicKeyToPemPkcs1(RSAPublicKey rsaPublicKey) → String
Enode the given rsaPublicKey to PEM format using the PKCS#1 standard.
generateEcKeyPair({String curve = 'prime256v1'}) → AsymmetricKeyPair<PublicKey, PrivateKey>
Generates a elliptic curve AsymmetricKeyPair.
generateRSAKeyPair({int keySize = 2048}) → AsymmetricKeyPair<PublicKey, PrivateKey>
Generates a RSA AsymmetricKeyPair with the given keySize. The default value for the keySize is 2048 bits.
getBytesFromPEMString(String pem, {bool checkHeader = true}) → Uint8List
Helper function for decoding the base64 in pem.
getHash(Uint8List bytes, {String algorithmName = 'SHA-256'}) → String
Get a hash for the given bytes using the given algorithm
getHashPlain(Uint8List bytes, {String algorithmName = 'SHA-256'}) → Uint8List
Get a hash for the given bytes using the given algorithm
getMd5ThumbprintFromBytes(Uint8List bytes) → String
Get a MD5 Thumbprint for the given bytes.
getModulusFromRSAPrivateKeyPem(String pem) → BigInt
Returns the modulus of the given pem that represents an RSA private key.
getPrivateKeyType(String pem) → String
Returns the private key type of the given pem
getSecureRandom() → SecureRandom
Generates a secure FortunaRandom
getSha1ThumbprintFromBytes(Uint8List bytes) → String
Get a SHA1 Thumbprint for the given bytes.
getSha256ThumbprintFromBytes(Uint8List bytes) → String
Get a SHA256 Thumbprint for the given bytes.
i2osp(BigInt number, {int? outLen, Endian endian = Endian.big}) → Uint8List
Conversion of integer to bytes according to RFC 3447 at datatracker.ietf.org/doc/html/rfc3447#page-8
osp2i(Iterable<int> bytes, {Endian endian = Endian.big}) → BigInt
Conversion of bytes to integer according to RFC 3447 at datatracker.ietf.org/doc/html/rfc3447#page-8
removePKCS7Padding(Uint8List padded) → Uint8List
Revomes the PKCS7 / PKCS5 padding from the padded bytes
rsaDecrypt(String cipherMessage, RSAPrivateKey privateKey) → String
Decrypt the given cipherMessage using the given RSA privateKey.
rsaEncrypt(String message, RSAPublicKey publicKey) → String
Encrypt the given message using the given RSA publicKey.
rsaPrivateKeyExponentToBytes(RSAPrivateKey privateKey) → Uint8List
Converts the RSAPrivateKey.exponent from the given privateKey to a Uint8List.
rsaPrivateKeyFromDERBytes(Uint8List bytes) → RSAPrivateKey
Decode the given bytes into an RSAPrivateKey.
rsaPrivateKeyFromDERBytesPkcs1(Uint8List bytes) → RSAPrivateKey
Decode the given bytes into an RSAPrivateKey.
rsaPrivateKeyFromPem(String pem) → RSAPrivateKey
Decode a RSAPrivateKey from the given pem String.
rsaPrivateKeyFromPemPkcs1(String pem) → RSAPrivateKey
Decode a RSAPrivateKey from the given pem string formated in the pkcs1 standard.
rsaPrivateKeyModulusToBytes(RSAPrivateKey privateKey) → Uint8List
Converts the RSAPrivateKey.modulus from the given privateKey to a Uint8List.
rsaPssSign(RSAPrivateKey privateKey, Uint8List dataToSign, Uint8List salt, {String algorithm = 'SHA-256/PSS'}) → Uint8List
Signing the given dataToSign with the given privateKey and the given salt.
rsaPssVerify(RSAPublicKey publicKey, Uint8List signedData, Uint8List signature, int saltLength, {String algorithm = 'SHA-256/PSS'}) → bool
Verifying the given signedData with the given publicKey, the given signature and the given saltLength. Will return true if the given signature matches the signedData.
rsaPublicKeyExponentToBytes(RSAPublicKey publicKey) → Uint8List
Converts the RSAPublicKey.exponent from the given publicKey to a Uint8List.
rsaPublicKeyFromDERBytes(Uint8List bytes) → RSAPublicKey
Decode the given bytes into an RSAPublicKey.
rsaPublicKeyFromDERBytesPkcs1(Uint8List bytes) → RSAPublicKey
Decode the given bytes into an RSAPublicKey.
rsaPublicKeyFromPem(String pem) → RSAPublicKey
Decode a RSAPublicKey from the given pem String.
rsaPublicKeyFromPemPkcs1(String pem) → RSAPublicKey
Decode a RSAPublicKey from the given pem string formated in the pkcs1 standard.
rsaPublicKeyModulusToBytes(RSAPublicKey publicKey) → Uint8List
Converts the RSAPublicKey.modulus from the given publicKey to a Uint8List.
rsaSign(RSAPrivateKey privateKey, Uint8List dataToSign, {String algorithmName = 'SHA-256/RSA'}) → Uint8List
Signing the given dataToSign with the given privateKey.
rsaVerify(RSAPublicKey publicKey, Uint8List signedData, Uint8List signature, {String algorithm = 'SHA-256/RSA'}) → bool
Verifying the given signedData with the given publicKey and the given signature. Will return true if the given signature matches the signedData.