| | 1 | | // Copyright (c) Microsoft Corporation. All rights reserved. |
| | 2 | | // Licensed under the MIT License. See License.txt in the project root for |
| | 3 | | // license information. |
| | 4 | | // |
| | 5 | |
|
| | 6 | | using System; |
| | 7 | | using System.Collections.Generic; |
| | 8 | | using System.Security.Cryptography; |
| | 9 | | using Newtonsoft.Json; |
| | 10 | |
|
| | 11 | | namespace Microsoft.Azure.KeyVault.WebKey |
| | 12 | | { |
| | 13 | | /// <summary> |
| | 14 | | /// As of http://tools.ietf.org/html/draft-ietf-jose-json-web-key-18 |
| | 15 | | /// </summary> |
| | 16 | | [JsonObject] |
| | 17 | | public sealed class JsonWebKey |
| | 18 | | { |
| | 19 | | // DataContract property names |
| | 20 | | internal const string Property_Kid = "kid"; |
| | 21 | |
|
| | 22 | | internal const string Property_Kty = "kty"; |
| | 23 | | internal const string Property_KeyOps = "key_ops"; |
| | 24 | |
|
| | 25 | | // RSA Key Property Names |
| | 26 | | internal const string Property_D = "d"; |
| | 27 | |
|
| | 28 | | internal const string Property_DP = "dp"; |
| | 29 | | internal const string Property_DQ = "dq"; |
| | 30 | | internal const string Property_E = "e"; |
| | 31 | | internal const string Property_QI = "qi"; |
| | 32 | | internal const string Property_N = "n"; |
| | 33 | | internal const string Property_P = "p"; |
| | 34 | | internal const string Property_Q = "q"; |
| | 35 | |
|
| | 36 | | // ECC Key Property Names |
| | 37 | | internal const string Property_Crv = "crv"; |
| | 38 | |
|
| | 39 | | internal const string Property_X = "x"; |
| | 40 | |
|
| | 41 | | internal const string Property_Y = "y"; |
| | 42 | | // Property_D the same as RSA Key |
| | 43 | |
|
| | 44 | | // Symmetric Key Property Names |
| | 45 | | internal const string Property_K = "k"; |
| | 46 | |
|
| | 47 | | // HSM Token Property Names |
| | 48 | | internal const string Property_T = "key_hsm"; |
| | 49 | |
|
| | 50 | | /// <summary> |
| | 51 | | /// Key Identifier |
| | 52 | | /// </summary> |
| | 53 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| 1632 | 54 | | public string Kid { get; set; } |
| | 55 | |
|
| | 56 | | /// <summary> |
| | 57 | | /// Gets or sets supported JsonWebKey key types (kty) for Elliptic |
| | 58 | | /// Curve, RSA, HSM, Octet, usually RSA. Possible values include: |
| | 59 | | /// 'EC', 'RSA', 'RSA-HSM', 'oct' |
| | 60 | | /// </summary> |
| | 61 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| 3348 | 62 | | public string Kty { get; set; } |
| | 63 | |
|
| | 64 | | /// <summary> |
| | 65 | | /// Supported Key Operations |
| | 66 | | /// </summary> |
| | 67 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| 1802 | 68 | | public IList<string> KeyOps { get; set; } |
| | 69 | |
|
| | 70 | | #region RSA Public Key Parameters |
| | 71 | |
|
| | 72 | | /// <summary> |
| | 73 | | /// RSA modulus, in Base64. |
| | 74 | | /// </summary> |
| | 75 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 76 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 4536 | 77 | | public byte[] N { get; set; } |
| | 78 | |
|
| | 79 | | /// <summary> |
| | 80 | | /// RSA public exponent, in Base64. |
| | 81 | | /// </summary> |
| | 82 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 83 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 4426 | 84 | | public byte[] E { get; set; } |
| | 85 | |
|
| | 86 | | #endregion |
| | 87 | |
|
| | 88 | | #region RSA Private Key Parameters |
| | 89 | |
|
| | 90 | | /// <summary> |
| | 91 | | /// RSA Private Key Parameter |
| | 92 | | /// </summary> |
| | 93 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 94 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 2746 | 95 | | public byte[] DP { get; set; } |
| | 96 | |
|
| | 97 | | /// <summary> |
| | 98 | | /// RSA Private Key Parameter |
| | 99 | | /// </summary> |
| | 100 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 101 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 2686 | 102 | | public byte[] DQ { get; set; } |
| | 103 | |
|
| | 104 | | /// <summary> |
| | 105 | | /// RSA Private Key Parameter |
| | 106 | | /// </summary> |
| | 107 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 108 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 2622 | 109 | | public byte[] QI { get; set; } |
| | 110 | |
|
| | 111 | | /// <summary> |
| | 112 | | /// RSA secret prime |
| | 113 | | /// </summary> |
| | 114 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 115 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 2566 | 116 | | public byte[] P { get; set; } |
| | 117 | |
|
| | 118 | | /// <summary> |
| | 119 | | /// RSA secret prime, with p < q |
| | 120 | | /// </summary> |
| | 121 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 122 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 2506 | 123 | | public byte[] Q { get; set; } |
| | 124 | |
|
| | 125 | | #endregion |
| | 126 | |
|
| | 127 | | #region EC Public Key Parameters |
| | 128 | |
|
| | 129 | | /// <summary> |
| | 130 | | /// The curve for Elliptic Curve Cryptography (ECC) algorithms |
| | 131 | | /// </summary> |
| | 132 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| 1728 | 133 | | public string CurveName { get; set; } |
| | 134 | |
|
| | 135 | | /// <summary> |
| | 136 | | /// X coordinate for the Elliptic Curve point. |
| | 137 | | /// </summary> |
| | 138 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 139 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 1778 | 140 | | public byte[] X { get; set; } |
| | 141 | |
|
| | 142 | | /// <summary> |
| | 143 | | /// Y coordinate for the Elliptic Curve point. |
| | 144 | | /// </summary> |
| | 145 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 146 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 1746 | 147 | | public byte[] Y { get; set; } |
| | 148 | |
|
| | 149 | | #endregion |
| | 150 | |
|
| | 151 | | #region EC and RSA Private Key Parameters |
| | 152 | |
|
| | 153 | | /// <summary> |
| | 154 | | /// RSA private exponent or ECC private key. |
| | 155 | | /// </summary> |
| | 156 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 157 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 3186 | 158 | | public byte[] D { get; set; } |
| | 159 | |
|
| | 160 | | #endregion |
| | 161 | |
|
| | 162 | | #region Symmetric Key Parameters |
| | 163 | |
|
| | 164 | | /// <summary> |
| | 165 | | /// Symmetric key |
| | 166 | | /// </summary> |
| | 167 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 168 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 1364 | 169 | | public byte[] K { get; set; } |
| | 170 | |
|
| | 171 | | #endregion |
| | 172 | |
|
| | 173 | | /// <summary> |
| | 174 | | /// HSM Token, used with "Bring Your Own Key" |
| | 175 | | /// </summary> |
| | 176 | | [JsonProperty( DefaultValueHandling = DefaultValueHandling.Ignore, NullValueHandling = NullValueHandling.Ignore, |
| | 177 | | [JsonConverter( typeof( Base64UrlJsonConverter ) )] |
| 1088 | 178 | | public byte[] T { get; set; } |
| | 179 | |
|
| | 180 | | /// <summary> |
| | 181 | | /// Holds properties that are not part of current schema. |
| | 182 | | /// </summary> |
| | 183 | | [JsonExtensionData] |
| | 184 | | public IDictionary<string, object> ExtensionData; |
| | 185 | |
|
| | 186 | | /// <summary> |
| | 187 | | /// Iterates over all JSON properties of this object, calling the specified visitor. |
| | 188 | | /// </summary> |
| | 189 | | /// All JSON properties are visited. This includes normal properties, properties that are not useful for the |
| | 190 | | /// key type, and properties that are not part of current schema (extension data). |
| | 191 | | /// Users must assume the properties are visited in random order. |
| | 192 | | /// <param name="visitor">A visitor that will be called for each property.</param> |
| | 193 | | public void VisitProperties( Action<string, object> visitor ) |
| | 194 | | { |
| 4 | 195 | | if ( visitor == null ) |
| 0 | 196 | | throw new ArgumentNullException( nameof( visitor ) ); |
| | 197 | |
|
| 4 | 198 | | visitor( Property_Crv, CurveName ); |
| 4 | 199 | | visitor( Property_D, D ); |
| 4 | 200 | | visitor( Property_DP, DP ); |
| 4 | 201 | | visitor( Property_DQ, DQ ); |
| 4 | 202 | | visitor( Property_E, E ); |
| 4 | 203 | | visitor( Property_K, K ); |
| 4 | 204 | | visitor( Property_KeyOps, KeyOps ); |
| 4 | 205 | | visitor( Property_Kid, Kid ); |
| 4 | 206 | | visitor( Property_Kty, Kty ); |
| 4 | 207 | | visitor( Property_N, N ); |
| 4 | 208 | | visitor( Property_P, P ); |
| 4 | 209 | | visitor( Property_Q, Q ); |
| 4 | 210 | | visitor( Property_T, T ); |
| 4 | 211 | | visitor( Property_X, X ); |
| 4 | 212 | | visitor( Property_Y, Y ); |
| | 213 | |
|
| 4 | 214 | | if ( ExtensionData != null ) |
| 0 | 215 | | foreach ( var entry in ExtensionData ) |
| 0 | 216 | | visitor( entry.Key, entry.Value ); |
| 4 | 217 | | } |
| | 218 | |
|
| | 219 | | /// <summary> |
| | 220 | | /// Creates an instance of <see cref="JsonWebKey"/> |
| | 221 | | /// </summary> |
| | 222 | | [JsonConstructor] |
| 670 | 223 | | public JsonWebKey() |
| | 224 | | { |
| | 225 | | // Intentionally empty |
| 670 | 226 | | } |
| | 227 | |
|
| | 228 | | /// <summary> |
| | 229 | | /// Converts an AES object to a WebKey of type Octet |
| | 230 | | /// </summary> |
| | 231 | | /// <param name="aesProvider"></param> |
| 12 | 232 | | public JsonWebKey( Aes aesProvider ) |
| | 233 | | { |
| 12 | 234 | | if ( aesProvider == null ) |
| 0 | 235 | | throw new ArgumentNullException( "aesProvider" ); |
| | 236 | |
|
| 12 | 237 | | Kty = JsonWebKeyType.Octet; |
| 12 | 238 | | K = aesProvider.Key; |
| 12 | 239 | | } |
| | 240 | |
|
| | 241 | | /// <summary> |
| | 242 | | /// Initializes a new instance with the key provided by the ECDsa object. |
| | 243 | | /// </summary> |
| | 244 | | /// <param name="ecsda">The ECDsa object previously initialized with the desired key.</param> |
| | 245 | | /// <param name="includePrivateParameters">Tells if the instance must inclue private parameters. |
| | 246 | | /// This requires the key in the ECDsa object to include private material and be marked as exportable.</param> |
| | 247 | | public JsonWebKey(ECDsa ecsda, bool includePrivateParameters = false ) |
| 44 | 248 | | : this( ecParameters: EccExtension.ExportParameters( ecsda, includePrivateParameters ) ) |
| | 249 | | { |
| 44 | 250 | | KeyOps = ecsda.GetKeyOperations(); |
| 44 | 251 | | } |
| | 252 | |
|
| | 253 | | /// <summary> |
| | 254 | | /// Converts a ECParameters object to a WebKey of type EC. |
| | 255 | | /// </summary> |
| | 256 | | /// <param name="ecParameters">The EC object to convert</param> |
| | 257 | | /// <returns>A WebKey representing the EC object</returns> |
| 48 | 258 | | public JsonWebKey( ECParameters ecParameters ) |
| | 259 | | { |
| 48 | 260 | | Kty = JsonWebKeyType.EllipticCurve; |
| | 261 | |
|
| 48 | 262 | | CurveName = ecParameters.Curve; |
| 48 | 263 | | D = ecParameters.D; |
| 48 | 264 | | X = ecParameters.X; |
| 48 | 265 | | Y = ecParameters.Y; |
| 48 | 266 | | } |
| | 267 | |
|
| | 268 | | /// <summary> |
| | 269 | | /// Converts a RSA object to a WebKey of type RSA. |
| | 270 | | /// </summary> |
| | 271 | | /// <param name="rsaProvider">The RSA object to convert</param> |
| | 272 | | /// <param name="includePrivateParameters">True to include the RSA private key parameters</param> |
| | 273 | | /// <returns>A WebKey representing the RSA object</returns> |
| 0 | 274 | | public JsonWebKey( RSA rsaProvider, bool includePrivateParameters = false ) : this( rsaProvider.ExportParameters |
| | 275 | | { |
| 0 | 276 | | } |
| | 277 | |
|
| | 278 | | /// <summary> |
| | 279 | | /// Converts a RSAParameters object to a WebKey of type RSA. |
| | 280 | | /// </summary> |
| | 281 | | /// <param name="rsaParameters">The RSA object to convert</param> |
| | 282 | | /// <returns>A WebKey representing the RSA object</returns> |
| 18 | 283 | | public JsonWebKey( RSAParameters rsaParameters ) |
| | 284 | | { |
| 18 | 285 | | Kty = JsonWebKeyType.Rsa; |
| | 286 | |
|
| 18 | 287 | | E = rsaParameters.Exponent; |
| 18 | 288 | | N = rsaParameters.Modulus; |
| | 289 | |
|
| 18 | 290 | | D = rsaParameters.D; |
| 18 | 291 | | DP = rsaParameters.DP; |
| 18 | 292 | | DQ = rsaParameters.DQ; |
| 18 | 293 | | QI = rsaParameters.InverseQ; |
| 18 | 294 | | P = rsaParameters.P; |
| 18 | 295 | | Q = rsaParameters.Q; |
| 18 | 296 | | } |
| | 297 | |
|
| | 298 | | public override bool Equals( object obj ) |
| | 299 | | { |
| 366 | 300 | | if ( obj == this ) |
| 0 | 301 | | return true; |
| | 302 | |
|
| 366 | 303 | | var other = obj as JsonWebKey; |
| | 304 | |
|
| 366 | 305 | | if ( other == null ) |
| 26 | 306 | | return false; |
| | 307 | |
|
| 340 | 308 | | return Equals( other ); |
| | 309 | | } |
| | 310 | |
|
| | 311 | | /// <summary> |
| | 312 | | /// Compares <see cref="JsonWebKey"/> objects |
| | 313 | | /// </summary> |
| | 314 | | /// <param name="other"> the <see cref="JsonWebKey"/> object to compare with </param> |
| | 315 | | /// <returns> whether the <see cref="JsonWebKey"/> objects are equals </returns> |
| | 316 | | public bool Equals( JsonWebKey other ) |
| | 317 | | { |
| 442 | 318 | | if ( other == this ) |
| 0 | 319 | | return true; |
| | 320 | |
|
| 442 | 321 | | if ( other == null ) |
| 2 | 322 | | return false; |
| | 323 | |
|
| 440 | 324 | | if ( !string.Equals( Kid, other.Kid ) ) |
| 0 | 325 | | return false; |
| | 326 | |
|
| 440 | 327 | | if ( !string.Equals( Kty, other.Kty ) ) |
| 0 | 328 | | return false; |
| | 329 | |
|
| 440 | 330 | | if ( !AreEqual( KeyOps, other.KeyOps ) ) |
| 4 | 331 | | return false; |
| | 332 | |
|
| 436 | 333 | | if ( !string.Equals( CurveName, other.CurveName ) ) |
| 16 | 334 | | return false; |
| | 335 | |
|
| 420 | 336 | | if ( !AreEqual( K, other.K ) ) |
| 0 | 337 | | return false; |
| | 338 | |
|
| | 339 | | // Public parameters |
| 420 | 340 | | if ( !AreEqual( N, other.N ) ) |
| 10 | 341 | | return false; |
| | 342 | |
|
| 410 | 343 | | if ( !AreEqual( E, other.E ) ) |
| 10 | 344 | | return false; |
| | 345 | |
|
| 400 | 346 | | if ( !AreEqual( X, other.X ) ) |
| 16 | 347 | | return false; |
| | 348 | |
|
| 384 | 349 | | if ( !AreEqual( Y, other.Y ) ) |
| 16 | 350 | | return false; |
| | 351 | |
|
| | 352 | | // Private parameters |
| 368 | 353 | | if ( !AreEqual( D, other.D ) ) |
| 26 | 354 | | return false; |
| | 355 | |
|
| 342 | 356 | | if ( !AreEqual( DP, other.DP ) ) |
| 10 | 357 | | return false; |
| | 358 | |
|
| 332 | 359 | | if ( !AreEqual( DQ, other.DQ ) ) |
| 10 | 360 | | return false; |
| | 361 | |
|
| 322 | 362 | | if ( !AreEqual( QI, other.QI ) ) |
| 10 | 363 | | return false; |
| | 364 | |
|
| 312 | 365 | | if ( !AreEqual( P, other.P ) ) |
| 10 | 366 | | return false; |
| | 367 | |
|
| 302 | 368 | | if ( !AreEqual( Q, other.Q ) ) |
| 10 | 369 | | return false; |
| | 370 | |
|
| | 371 | | // HSM token |
| 292 | 372 | | if ( !AreEqual( T, other.T ) ) |
| 0 | 373 | | return false; |
| | 374 | |
|
| 292 | 375 | | return true; |
| | 376 | | } |
| | 377 | |
|
| | 378 | | private static bool AreEqual( byte[] a, byte[] b ) |
| | 379 | | { |
| 4304 | 380 | | if ( a == b ) |
| 1818 | 381 | | return true; |
| | 382 | |
|
| 2486 | 383 | | if ( a == null ) |
| | 384 | | // b can't be null because otherwise we would return true above. |
| 0 | 385 | | return b.Length == 0; |
| | 386 | |
|
| 2486 | 387 | | if ( b == null ) |
| | 388 | | // Likewise, a can't be null. |
| 128 | 389 | | return a.Length == 0; |
| | 390 | |
|
| 2358 | 391 | | if ( a.Length != b.Length ) |
| 80 | 392 | | return false; |
| | 393 | |
|
| 678376 | 394 | | for ( var i = 0; i < a.Length; ++i ) |
| 336910 | 395 | | if ( a[i] != b[i] ) |
| 0 | 396 | | return false; |
| | 397 | |
|
| 2278 | 398 | | return true; |
| | 399 | | } |
| | 400 | |
|
| | 401 | | private static bool AreEqual( IList<string> a, IList<string> b ) |
| | 402 | | { |
| 440 | 403 | | if ( a == b ) |
| 340 | 404 | | return true; |
| | 405 | |
|
| 100 | 406 | | if ( ( a == null ) != ( b == null ) ) |
| 4 | 407 | | return false; |
| | 408 | |
|
| 96 | 409 | | if ( a.Count != b.Count ) |
| 0 | 410 | | return false; |
| | 411 | |
|
| 688 | 412 | | for ( var i = 0; i < a.Count; ++i ) |
| 248 | 413 | | if ( a[i] != b[i] ) |
| 0 | 414 | | return false; |
| | 415 | |
|
| 96 | 416 | | return true; |
| | 417 | | } |
| | 418 | |
|
| | 419 | | public override int GetHashCode() |
| | 420 | | { |
| 40 | 421 | | var hashCode = 48313; // setting it to a random prime number |
| | 422 | |
|
| 40 | 423 | | if ( Kid != null ) |
| | 424 | | { |
| 22 | 425 | | hashCode += Kid.GetHashCode(); |
| | 426 | | } |
| | 427 | |
|
| 40 | 428 | | switch ( Kty ) |
| | 429 | | { |
| | 430 | | case JsonWebKeyType.Octet: |
| 14 | 431 | | return hashCode + GetHashCode( K ); |
| | 432 | |
|
| | 433 | | case JsonWebKeyType.EllipticCurve: |
| 0 | 434 | | return hashCode + GetHashCode( X ); |
| | 435 | |
|
| | 436 | | case JsonWebKeyType.Rsa: |
| 0 | 437 | | return hashCode + GetHashCode( N ); |
| | 438 | |
|
| | 439 | | case JsonWebKeyType.EllipticCurveHsm: |
| | 440 | | case JsonWebKeyType.RsaHsm: |
| 18 | 441 | | return hashCode + GetHashCode( T ); |
| | 442 | |
|
| | 443 | | default: |
| 8 | 444 | | return hashCode; |
| | 445 | | } |
| | 446 | | } |
| | 447 | |
|
| | 448 | | private static int GetHashCode( byte[] obj ) |
| | 449 | | { |
| 32 | 450 | | if ( obj == null || obj.Length == 0 ) |
| 10 | 451 | | return 0; |
| | 452 | |
|
| 22 | 453 | | var hashCode = 0; |
| | 454 | |
|
| | 455 | | // Rotate by 3 bits and XOR the new value. |
| 912 | 456 | | foreach ( var v in obj ) |
| 434 | 457 | | hashCode = ( hashCode << 3 ) | ( hashCode >> 29 ) ^ v; |
| | 458 | |
|
| 22 | 459 | | return hashCode; |
| | 460 | | } |
| | 461 | |
|
| | 462 | | /// <summary> |
| | 463 | | /// Verifies whether this object has a private key |
| | 464 | | /// </summary> |
| | 465 | | /// <returns> True if the object has private key; false otherwise.</returns> |
| | 466 | | public bool HasPrivateKey() |
| | 467 | | { |
| 6 | 468 | | switch ( Kty ) |
| | 469 | | { |
| | 470 | | case JsonWebKeyType.Octet: |
| 2 | 471 | | return K != null; |
| | 472 | |
|
| | 473 | | case JsonWebKeyType.EllipticCurve: |
| | 474 | | case JsonWebKeyType.EllipticCurveHsm: |
| 0 | 475 | | return D != null; |
| | 476 | |
|
| | 477 | | case JsonWebKeyType.Rsa: |
| | 478 | | case JsonWebKeyType.RsaHsm: |
| 4 | 479 | | return D != null && DP != null && DQ != null && QI != null && P != null && Q != null; |
| | 480 | |
|
| | 481 | | default: |
| 0 | 482 | | return false; |
| | 483 | | } |
| | 484 | | } |
| | 485 | |
|
| | 486 | | /// <summary> |
| | 487 | | /// Determines if the WebKey object is valid according to the rules for |
| | 488 | | /// each of value of JsonWebKeyType. |
| | 489 | | /// </summary> |
| | 490 | | /// <returns>true if the WebKey is valid</returns> |
| | 491 | | public bool IsValid() |
| | 492 | | { |
| 8 | 493 | | var verifierOptions = |
| 8 | 494 | | JsonWebKeyVerifier.Options.DenyIncompatibleOperations | |
| 8 | 495 | | JsonWebKeyVerifier.Options.DenyExtraneousFields; |
| | 496 | |
|
| 8 | 497 | | string unused = null; |
| 8 | 498 | | return JsonWebKeyVerifier.VerifyByKeyType( this, verifierOptions, ref unused ); |
| | 499 | | } |
| | 500 | |
|
| | 501 | | /// <summary> |
| | 502 | | /// Converts a WebKey of type Octet to an AES object. |
| | 503 | | /// </summary> |
| | 504 | | /// <returns>An AES object</returns> |
| | 505 | | public Aes ToAes() |
| | 506 | | { |
| 2 | 507 | | if ( !Kty.Equals( JsonWebKeyType.Octet ) ) |
| 0 | 508 | | throw new InvalidOperationException( "key is not an octet key" ); |
| | 509 | |
|
| 2 | 510 | | if ( K == null ) |
| 0 | 511 | | throw new InvalidOperationException( "key does not contain a value" ); |
| | 512 | |
|
| 2 | 513 | | var result = Aes.Create(); |
| | 514 | |
|
| 2 | 515 | | if ( result != null ) |
| 2 | 516 | | result.Key = K; |
| | 517 | |
|
| 2 | 518 | | return result; |
| | 519 | | } |
| | 520 | |
|
| | 521 | | /// <summary> |
| | 522 | | /// Remove leading zeros from all RSA parameters. |
| | 523 | | /// </summary> |
| | 524 | | public void CanonicalizeRSA() |
| | 525 | | { |
| 90 | 526 | | N = RemoveLeadingZeros( N ); |
| 90 | 527 | | E = RemoveLeadingZeros( E ); |
| 90 | 528 | | D = RemoveLeadingZeros( D ); |
| 90 | 529 | | DP = RemoveLeadingZeros( DP ); |
| 90 | 530 | | DQ = RemoveLeadingZeros( DQ ); |
| 90 | 531 | | QI = RemoveLeadingZeros( QI ); |
| 90 | 532 | | P = RemoveLeadingZeros( P ); |
| 90 | 533 | | Q = RemoveLeadingZeros( Q ); |
| 90 | 534 | | } |
| | 535 | |
|
| | 536 | | /// <summary> |
| | 537 | | /// Converts a WebKey of type RSA or RSAHSM to a RSA object |
| | 538 | | /// </summary> |
| | 539 | | /// <param name="includePrivateParameters">Tells if private material must be included.</param> |
| | 540 | | /// <returns>An initialized RSA instance</returns> |
| | 541 | | public RSA ToRSA( bool includePrivateParameters = false ) |
| | 542 | | { |
| 786 | 543 | | var rsaParameters = ToRSAParameters( includePrivateParameters ); |
| 586 | 544 | | var result = RSA.Create(); |
| 586 | 545 | | result.ImportParameters( rsaParameters ); |
| 586 | 546 | | return result; |
| | 547 | | } |
| | 548 | |
|
| | 549 | | /// <summary> |
| | 550 | | /// Converts a WebKey of type RSA or RSAHSM to a RSA parameter object |
| | 551 | | /// </summary> |
| | 552 | | /// <param name="includePrivateParameters">Tells if private material must be included.</param> |
| | 553 | | /// <returns>An RSA parameter</returns> |
| | 554 | | public RSAParameters ToRSAParameters( bool includePrivateParameters = false ) |
| | 555 | | { |
| 996 | 556 | | if ( Kty != JsonWebKeyType.Rsa && Kty != JsonWebKeyType.RsaHsm ) |
| 0 | 557 | | throw new ArgumentException( "JsonWebKey is not a RSA key" ); |
| | 558 | |
|
| 996 | 559 | | VerifyNonZero( nameof( N ), N ); |
| 916 | 560 | | VerifyNonZero( nameof( E ), E ); |
| | 561 | |
|
| | 562 | | // Length requirements defined by 2.2.2.9.1 RSA Private Key BLOB (https://msdn.microsoft.com/en-us/library/c |
| | 563 | | // See KV bugs 190589 and 183469. |
| | 564 | |
|
| 836 | 565 | | var result = new RSAParameters(); |
| 836 | 566 | | result.Modulus = RemoveLeadingZeros( N ); |
| 836 | 567 | | result.Exponent = ForceLength( nameof( E ), E, 4 ); |
| | 568 | |
|
| 836 | 569 | | if ( includePrivateParameters ) |
| | 570 | | { |
| 488 | 571 | | var bitlen = result.Modulus.Length * 8; |
| | 572 | |
|
| 488 | 573 | | result.D = ForceLength( nameof( D ), D, bitlen / 8 ); |
| 448 | 574 | | result.DP = ForceLength( nameof( DP ), DP, bitlen / 16 ); |
| 408 | 575 | | result.DQ = ForceLength( nameof( DQ ), DQ, bitlen / 16 ); |
| 368 | 576 | | result.InverseQ = ForceLength( nameof( QI ), QI, bitlen / 16 ); |
| 328 | 577 | | result.P = ForceLength( nameof( P ), P, bitlen / 16 ); |
| 288 | 578 | | result.Q = ForceLength( nameof( Q ), Q, bitlen / 16 ); |
| | 579 | | } |
| | 580 | |
|
| 596 | 581 | | return result; |
| | 582 | | } |
| | 583 | |
|
| | 584 | | /// <summary> |
| | 585 | | /// Converts a WebKey of type EC or EC-HSM to an ECDsa object |
| | 586 | | /// </summary> |
| | 587 | | /// <param name="includePrivateParameters">Tells if private material must be included.</param> |
| | 588 | | /// <returns>An initialized ECDsa instance</returns> |
| | 589 | | public ECDsa ToECDsa( bool includePrivateParameters = false ) |
| | 590 | | { |
| 108 | 591 | | return ToEcParameters( includePrivateParameters ).ToEcdsa( includePrivateParameters ); |
| | 592 | | } |
| | 593 | |
|
| | 594 | | /// <summary> |
| | 595 | | /// Converts a WebKey of type EC or EC-HSM to an EC parameter object. |
| | 596 | | /// </summary> |
| | 597 | | /// <param name="includePrivateParameters">Tells if private material must be included.</param> |
| | 598 | | /// <returns>An EC parameter object</returns> |
| | 599 | | public ECParameters ToEcParameters( bool includePrivateParameters = false ) |
| | 600 | | { |
| 116 | 601 | | if ( Kty != JsonWebKeyType.EllipticCurve && Kty != JsonWebKeyType.EllipticCurveHsm ) |
| 0 | 602 | | throw new ArgumentException( "JsonWebKey is not an EC key" ); |
| | 603 | |
|
| 116 | 604 | | VerifyNonZero( nameof( X ), X ); |
| 116 | 605 | | VerifyNonZero( nameof( Y ), Y ); |
| | 606 | |
|
| 116 | 607 | | var requiredSize = JsonWebKeyCurveName.GetKeyParameterSize( CurveName ); |
| 116 | 608 | | if ( requiredSize < 0 ) |
| | 609 | | { |
| 0 | 610 | | var curveDesc = CurveName == null ? "null" : $"\"{CurveName}\""; |
| 0 | 611 | | throw new ArgumentException( $"Invalid curve type: {curveDesc}" ); |
| | 612 | | } |
| | 613 | |
|
| 116 | 614 | | var result = new ECParameters(); |
| 116 | 615 | | result.Curve = CurveName; |
| 116 | 616 | | result.X = ForceLength( nameof( X ), X, requiredSize ); |
| 116 | 617 | | result.Y = ForceLength( nameof( Y ), Y, requiredSize ); |
| | 618 | |
|
| 116 | 619 | | if ( includePrivateParameters ) |
| | 620 | | { |
| 36 | 621 | | VerifyNonZero( nameof( D ), D ); |
| 28 | 622 | | result.D = ForceLength( nameof( D ), D, requiredSize ); |
| | 623 | | } |
| | 624 | |
|
| 108 | 625 | | return result; |
| | 626 | | } |
| | 627 | |
|
| | 628 | | private static void VerifyNonZero( string name, byte[] value ) |
| | 629 | | { |
| 2180 | 630 | | if ( value != null ) |
| 6872 | 631 | | foreach ( var t in value ) |
| 2350 | 632 | | if ( t != 0 ) |
| 2012 | 633 | | return; |
| | 634 | |
|
| 168 | 635 | | throw new ArgumentException( $"Value of \"{name}\" must be non-zero." ); |
| | 636 | | } |
| | 637 | |
|
| | 638 | | private static byte[] RemoveLeadingZeros( byte[] value ) |
| | 639 | | { |
| | 640 | | // Do nothing if: |
| | 641 | | // 1) value is null. |
| | 642 | | // 2) value is empty. |
| | 643 | | // 3) value has length of 1 (this is considered a useful zero). |
| | 644 | | // 4) first byte is already non-zero (optimization). |
| 1556 | 645 | | if ( value == null || value.Length <= 1 || value[0] != 0 ) |
| 1446 | 646 | | return value; |
| | 647 | |
|
| | 648 | | // We know that value[0] is zero, so we start from 1. |
| 484 | 649 | | for ( var i = 1; i < value.Length; ++i ) |
| | 650 | | { |
| 242 | 651 | | if ( value[i] != 0 ) |
| | 652 | | { |
| 110 | 653 | | var result = new byte[value.Length - i]; |
| 110 | 654 | | Array.Copy( value, i, result, 0, result.Length ); |
| 110 | 655 | | return result; |
| | 656 | | } |
| | 657 | | } |
| | 658 | |
|
| | 659 | | // If all is zero, return an array with a single useful zero. |
| 0 | 660 | | return new byte[] {0}; |
| | 661 | | } |
| | 662 | |
|
| | 663 | | private static byte[] ForceLength( string name, byte[] value, int requiredLength ) |
| | 664 | | { |
| 3424 | 665 | | if ( value == null || value.Length == 0 ) |
| 240 | 666 | | throw new ArgumentException( $"Value of \"{name}\" is null or empty." ); |
| | 667 | |
|
| 3184 | 668 | | if ( value.Length == requiredLength ) |
| 2216 | 669 | | return value; |
| | 670 | |
|
| 968 | 671 | | if ( value.Length < requiredLength ) |
| | 672 | | { |
| 888 | 673 | | var padded = new byte[requiredLength]; |
| 888 | 674 | | Array.Copy( value, 0, padded, requiredLength - value.Length, value.Length ); |
| 888 | 675 | | return padded; |
| | 676 | | } |
| | 677 | |
|
| | 678 | | // value.Length > requiredLength |
| | 679 | |
|
| | 680 | | // Make sure the extra bytes are all zeros. |
| 80 | 681 | | var extraLen = value.Length - requiredLength; |
| 800 | 682 | | for ( var i = 0; i < extraLen; ++i ) |
| 320 | 683 | | if ( value[i] != 0 ) |
| 0 | 684 | | throw new ArgumentException( $"Invalid length of \"{name}\": expected at most {requiredLength} bytes |
| | 685 | |
|
| 80 | 686 | | var trimmed = new byte[requiredLength]; |
| 80 | 687 | | Array.Copy( value, value.Length - requiredLength, trimmed, 0, requiredLength ); |
| 80 | 688 | | return trimmed; |
| | 689 | | } |
| | 690 | |
|
| | 691 | | public override string ToString() |
| | 692 | | { |
| 430 | 693 | | return JsonConvert.SerializeObject( this ); |
| | 694 | | } |
| | 695 | |
|
| | 696 | | /// <summary> |
| | 697 | | /// Best effort to clear private key material |
| | 698 | | /// Not strong guarantee since GC may move the arrays during compact. |
| | 699 | | /// </summary> |
| | 700 | | public void ClearMemory() |
| | 701 | | { |
| | 702 | | // We ignore kty and clear everything. |
| | 703 | |
|
| | 704 | | // Octet keys: |
| 10 | 705 | | ZeroArray( K ); |
| 10 | 706 | | K = null; |
| | 707 | |
|
| | 708 | | // Rsa keys: |
| | 709 | |
|
| | 710 | | // We want to clear public key to avoid identification. |
| 10 | 711 | | ZeroArray( N ); |
| 10 | 712 | | ZeroArray( E ); |
| | 713 | |
|
| | 714 | | // Private material of RSA: |
| 10 | 715 | | ZeroArray( D ); |
| 10 | 716 | | ZeroArray( DP ); |
| 10 | 717 | | ZeroArray( DQ ); |
| 10 | 718 | | ZeroArray( QI ); |
| 10 | 719 | | ZeroArray( P ); |
| 10 | 720 | | ZeroArray( Q ); |
| 10 | 721 | | N = E = D = DP = DQ = QI = P = Q = null; |
| | 722 | |
|
| | 723 | | // RsaHsm keys: |
| 10 | 724 | | ZeroArray( T ); |
| 10 | 725 | | T = null; |
| | 726 | |
|
| | 727 | | // Elliptic curve |
| 10 | 728 | | ZeroArray( X ); |
| 10 | 729 | | ZeroArray( Y ); |
| 10 | 730 | | ZeroArray( D ); // D is intentionally repeated. |
| 10 | 731 | | X = Y = D = null; |
| | 732 | |
|
| 10 | 733 | | switch ( Kty ) |
| | 734 | | { |
| | 735 | | case JsonWebKeyType.Octet: |
| | 736 | | case JsonWebKeyType.EllipticCurve: |
| | 737 | | case JsonWebKeyType.EllipticCurveHsm: |
| | 738 | | case JsonWebKeyType.Rsa: |
| | 739 | | case JsonWebKeyType.RsaHsm: |
| | 740 | | // Supported types fall here. |
| | 741 | | break; |
| | 742 | |
|
| | 743 | | default: |
| | 744 | | // Unsupported types fall here. |
| | 745 | | // If someone forgets to implement ClearMemory() for a new kty, this exception will reveal the mista |
| 0 | 746 | | throw new NotImplementedException( $"Unsupported kty: {Kty}" ); |
| | 747 | | } |
| 10 | 748 | | } |
| | 749 | |
|
| | 750 | | private static void ZeroArray( byte[] a ) |
| | 751 | | { |
| 130 | 752 | | if ( a == null ) |
| 10 | 753 | | return; |
| 120 | 754 | | Array.Clear( a, 0, a.Length ); |
| 120 | 755 | | } |
| | 756 | | } |
| | 757 | | } |