| | 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 | | using System; |
| | 6 | | using System.Collections.Generic; |
| | 7 | | using System.Diagnostics; |
| | 8 | | using System.Text; |
| | 9 | |
|
| | 10 | | namespace Microsoft.Azure.KeyVault.WebKey |
| | 11 | | { |
| | 12 | | /// <summary> |
| | 13 | | /// A class that verifies instances of <see cref="JsonWebKey"/> according to key type. |
| | 14 | | /// </summary> |
| | 15 | | public abstract class JsonWebKeyVerifier |
| | 16 | | { |
| | 17 | | /// <summary> |
| | 18 | | /// Indicates which type of key this verifier applies to. |
| | 19 | | /// </summary> |
| | 20 | | /// This is typically a value of <see cref="JsonWebKeyType"/>, though other values are allowed if registered |
| | 21 | | /// with the <see cref="Register"/> method. |
| | 22 | | public string Kty { get; } |
| | 23 | |
|
| | 24 | | /// <summary> |
| | 25 | | /// Initializes a new instance setting the specified value in the <see cref="Kty"/> property. |
| | 26 | | /// </summary> |
| | 27 | | /// <param name="kty">Indicates which type of key this verifier applies to.</param> |
| | 28 | | /// <exception cref="ArgumentNullException">If the specified value is <code>null</code>, empty or whitespace.</e |
| | 29 | | /// <exception cref="ArgumentException">If the specified value contains invalid characters.</exception> |
| | 30 | | protected JsonWebKeyVerifier( string kty ) |
| | 31 | | { |
| | 32 | | if ( string.IsNullOrWhiteSpace( kty ) ) |
| | 33 | | throw new ArgumentNullException( nameof( kty ) ); |
| | 34 | |
|
| | 35 | | foreach ( var ch in kty ) |
| | 36 | | { |
| | 37 | | if ( ch >= '0' && ch <= '9' ) |
| | 38 | | continue; |
| | 39 | | if ( ch >= 'A' && ch <= 'Z' ) |
| | 40 | | continue; |
| | 41 | | if ( ch >= 'a' && ch <= 'z' ) |
| | 42 | | continue; |
| | 43 | | if ( ch == '-' || ch == '.' || ch == '_' ) |
| | 44 | | continue; |
| | 45 | |
|
| | 46 | | throw new ArgumentException( "Value contains invalid characters.", nameof( kty ) ); |
| | 47 | | } |
| | 48 | |
|
| | 49 | | Kty = kty; |
| | 50 | | } |
| | 51 | |
|
| | 52 | | /// <summary> |
| | 53 | | /// Tells if the type of key verified by this object supports public key algorithms. |
| | 54 | | /// </summary> |
| | 55 | | /// Note to implementers: if this method returns <code>true</code>, the methods |
| | 56 | | /// <see cref="IsPublicKeyComplete"/>, <see cref="IsPublicKeyValid"/>, <see cref="IsPrivateKeyComplete"/> and |
| | 57 | | /// <see cref="IsPrivateKeyValid"/> must be overriden. |
| | 58 | | public abstract bool IsPublicKeyCrypto { get; } |
| | 59 | |
|
| | 60 | | /// <summary> |
| | 61 | | /// Tells if the type of key verified by this object supports symmetric key algorithms. |
| | 62 | | /// </summary> |
| | 63 | | /// Note to implementers: if this method returns <code>true</code>, the methods |
| | 64 | | /// <see cref="IsSymmetricKeyComplete"/> and <see cref="IsSymmetricKeyValid"/> must be overriden. |
| | 65 | | public abstract bool IsSymmetricKeyCrypto { get; } |
| | 66 | |
|
| | 67 | | /// <summary> |
| | 68 | | /// Tells if the type of key verified by this object contains a secret component, such as a hardware key token. |
| | 69 | | /// </summary> |
| | 70 | | /// Note to implementers: if this method returns <code>true</code>, the methods |
| | 71 | | /// <see cref="IsSecretKeyComplete"/> and <see cref="IsSecretKeyValid"/> must be overriden. |
| | 72 | | public abstract bool HasSecretKey { get; } |
| | 73 | |
|
| | 74 | | /// <summary> |
| | 75 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains values at properties that represent t |
| | 76 | | /// </summary> |
| | 77 | | /// <para>If all required public key properties (for the key type) are specified in the instance, the method mus |
| | 78 | | /// <code>true</code> and not modify the <paramref name="missingProps"/> parameter.</para> |
| | 79 | | /// <para>If some public key property is missing, the method must return <code>false</code> and set <paramref na |
| | 80 | | /// with a value - typically a <see cref="List{T}"/> - containing all missing properties.</para> |
| | 81 | | /// <param name="webKey">The instance to verify.</param> |
| | 82 | | /// <param name="missingProps">A reference to a variable that tells the list of missing properties. Callers must |
| | 83 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 84 | | public virtual bool IsPublicKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 85 | | { |
| | 86 | | throw ThrowDefaultForPublicKeyCrypto( nameof( IsPublicKeyComplete ) ); |
| | 87 | | } |
| | 88 | |
|
| | 89 | | /// <summary> |
| | 90 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains a possibly valid public key (see rema |
| | 91 | | /// </summary> |
| | 92 | | /// <para>Because fully validating a key may require unfeasable amount of resources, this method only has to che |
| | 93 | | /// for obvious issues. As a guideline, we say that the code only verifies obvious issues if it runs in constant |
| | 94 | | /// It's perfectly valid for implementors to do nothing and simply return <code>true</code>.</para> |
| | 95 | | /// <para>This method assumes that <see cref="IsPublicKeyComplete"/> was called and returned <code>true</code>. |
| | 96 | | /// doesn't test again for the presence of required properties. It may throw <see cref="NullReferenceException"/ |
| | 97 | | /// if the caller doesn't see <see cref="IsPublicKeyComplete"/> returning <code>true</code> first.</para> |
| | 98 | | /// <para>If the valiation code finds no issue, this method must return <code>true</code> without modifying the |
| | 99 | | /// <paramref name="errorMsg"/>.</para> |
| | 100 | | /// <para>If some issue is found, this method must return <code>false</code> and tell more details in the |
| | 101 | | /// <paramref name="errorMsg"/> parameter.</para> |
| | 102 | | /// <param name="webKey">The instance to verify.</param> |
| | 103 | | /// <param name="errorMsg">A reference to a variable that will contain an error message. Callers must |
| | 104 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 105 | | public virtual bool IsPublicKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 106 | | { |
| | 107 | | throw ThrowDefaultForPublicKeyCrypto( nameof( IsPublicKeyValid ) ); |
| | 108 | | } |
| | 109 | |
|
| | 110 | | /// <summary> |
| | 111 | | /// Same as <see cref="IsPublicKeyComplete"/>, but for the private key. |
| | 112 | | /// </summary> |
| | 113 | | public virtual bool IsPrivateKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 114 | | { |
| | 115 | | throw ThrowDefaultForPublicKeyCrypto( nameof( IsPrivateKeyComplete ) ); |
| | 116 | | } |
| | 117 | |
|
| | 118 | | /// <summary> |
| | 119 | | /// Same as <see cref="IsPublicKeyValid"/>, but for the private key. |
| | 120 | | /// </summary> |
| | 121 | | public virtual bool IsPrivateKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 122 | | { |
| | 123 | | throw ThrowDefaultForPublicKeyCrypto( nameof( IsPrivateKeyValid ) ); |
| | 124 | | } |
| | 125 | |
|
| | 126 | | /// <summary> |
| | 127 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains values in one or more properties that |
| | 128 | | /// represent the private key. |
| | 129 | | /// </summary> |
| | 130 | | /// <para>This method is used to protect private key material from accidental leakage.</para> |
| | 131 | | /// <para>If no private key property (for the key type) is specified in the instance, the method must return |
| | 132 | | /// <code>false</code> and not modify the <paramref name="specifiedProps"/> parameter.</para> |
| | 133 | | /// <para>If one or more private key property is specified, the method must return <code>true</code> and optiona |
| | 134 | | /// set <paramref name="specifiedProps"/> with a value - typically a <see cref="List{T}"/> - containing the spec |
| | 135 | | /// <param name="webKey">The instance to verify.</param> |
| | 136 | | /// <param name="specifiedProps">A reference to a variable that tells the list of specified properties. Callers |
| | 137 | | /// set the variable to <code>null</code> and examine the value only if this method returns <code>true</code>.</ |
| | 138 | | /// <returns><code>true</code> if a value is found in at least one property that describe the private key; |
| | 139 | | /// <code>false</code> otherwise.</returns> |
| | 140 | | public virtual bool IsAnyPrivateKeyParamSpecified( JsonWebKey webKey, ref ICollection<string> specifiedProps ) |
| | 141 | | { |
| | 142 | | throw ThrowDefaultForPublicKeyCrypto( nameof( IsAnyPrivateKeyParamSpecified ) ); |
| | 143 | | } |
| | 144 | |
|
| | 145 | | private Exception ThrowDefaultForPublicKeyCrypto( string methodName ) |
| | 146 | | { |
| | 147 | | if ( IsPublicKeyCrypto ) |
| | 148 | | throw new NotImplementedException( $"Type {GetType().Name} is a bad implementation. If {nameof( IsPublic |
| | 149 | |
|
| | 150 | | throw new InvalidOperationException( $"Type {GetType().Name} is not intended for public key cryptography." ) |
| | 151 | | } |
| | 152 | |
|
| | 153 | | /// <summary> |
| | 154 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains values at properties that represent t |
| | 155 | | /// </summary> |
| | 156 | | /// <para>If all required symmetric key properties (for the key type) are specified in the instance, the method |
| | 157 | | /// <code>true</code> and not modify the <paramref name="missingProps"/> parameter.</para> |
| | 158 | | /// <para>If some property is missing, the method must return <code>false</code> and set <paramref name="missing |
| | 159 | | /// to a value - typically a <see cref="List{T}"/> - containing all missing properties.</para> |
| | 160 | | /// <param name="webKey">The instance to verify.</param> |
| | 161 | | /// <param name="missingProps">A reference to a variable that tells the list of missing properties. Callers must |
| | 162 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 163 | | public virtual bool IsSymmetricKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 164 | | { |
| | 165 | | throw ThrowDefaultForSymmetricKeyCrypto( nameof( IsSymmetricKeyComplete ) ); |
| | 166 | | } |
| | 167 | |
|
| | 168 | | /// <summary> |
| | 169 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains a possibly valid symmetric key (see r |
| | 170 | | /// </summary> |
| | 171 | | /// <para>Because fully validating a key may require unfeasable amount of resources, this method only has to che |
| | 172 | | /// for obvious issues. As a guideline, we say that the code only verifies obvious issues if it runs in constant |
| | 173 | | /// It's perfectly valid for implementors to do nothing and simply return <code>true</code>.</para> |
| | 174 | | /// <para>This method assumes that <see cref="IsSymmetricKeyComplete"/> was called and returned <code>true</code |
| | 175 | | /// doesn't test again for the presence of required properties. It may throw <see cref="NullReferenceException"/ |
| | 176 | | /// if the caller doesn't see <see cref="IsSymmetricKeyComplete"/> returning <code>true</code> first.</para> |
| | 177 | | /// <para>If the valiation code finds no issue, this method must return <code>true</code> without modifying the |
| | 178 | | /// <paramref name="errorMsg"/>.</para> |
| | 179 | | /// <para>If some issue is found, this method must return <code>false</code> and tell more details in the |
| | 180 | | /// <paramref name="errorMsg"/> parameter.</para> |
| | 181 | | /// <param name="webKey">The instance to verify.</param> |
| | 182 | | /// <param name="errorMsg">A reference to a variable that will contain an error message. Callers must |
| | 183 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 184 | | public virtual bool IsSymmetricKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 185 | | { |
| | 186 | | throw ThrowDefaultForSymmetricKeyCrypto( nameof( IsSymmetricKeyValid ) ); |
| | 187 | | } |
| | 188 | |
|
| | 189 | | private Exception ThrowDefaultForSymmetricKeyCrypto( string methodName ) |
| | 190 | | { |
| | 191 | | if ( IsSymmetricKeyCrypto ) |
| | 192 | | throw new NotImplementedException( $"Type {GetType().Name} is a bad implementation. If {nameof( IsSymmet |
| | 193 | |
|
| | 194 | | throw new InvalidOperationException( $"Type {GetType().Name} is not intended for symmetric key cryptography. |
| | 195 | | } |
| | 196 | |
|
| | 197 | | /// <summary> |
| | 198 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains values at properties that represent t |
| | 199 | | /// </summary> |
| | 200 | | /// <para>If all required secret key properties (for the key type) are specified in the instance, the method mus |
| | 201 | | /// <code>true</code> and not modify the <paramref name="missingProps"/> parameter.</para> |
| | 202 | | /// <para>If some property is missing, the method must return <code>false</code> and set <paramref name="missing |
| | 203 | | /// to a value - typically a <see cref="List{T}"/> - containing all missing properties.</para> |
| | 204 | | /// <param name="webKey">The instance to verify.</param> |
| | 205 | | /// <param name="missingProps">A reference to a variable that tells the list of missing properties. Callers must |
| | 206 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 207 | | public virtual bool IsSecretKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 208 | | { |
| | 209 | | throw ThrowDefaultForSecretKeyCrypto( nameof( IsSecretKeyComplete ) ); |
| | 210 | | } |
| | 211 | |
|
| | 212 | | /// <summary> |
| | 213 | | /// Determines if the specified <see cref="JsonWebKey"/> instance contains a possibly valid secret key (see rema |
| | 214 | | /// </summary> |
| | 215 | | /// <para>Because fully validating a key may require unfeasable amount of resources, this method only has to che |
| | 216 | | /// for obvious issues. As a guideline, we say that the code only verifies obvious issues if it runs in constant |
| | 217 | | /// It's perfectly valid for implementors to do nothing and simply return <code>true</code>.</para> |
| | 218 | | /// <para>This method assumes that <see cref="IsSecretKeyComplete"/> was called and returned <code>true</code>. |
| | 219 | | /// doesn't test again for the presence of required properties. It may throw <see cref="NullReferenceException"/ |
| | 220 | | /// if the caller doesn't see <see cref="IsSecretKeyComplete"/> returning <code>true</code> first.</para> |
| | 221 | | /// <para>If the valiation code finds no issue, this method must return <code>true</code> without modifying the |
| | 222 | | /// <paramref name="errorMsg"/>.</para> |
| | 223 | | /// <para>If some issue is found, this method must return <code>false</code> and tell more details in the |
| | 224 | | /// <paramref name="errorMsg"/> parameter.</para> |
| | 225 | | /// <param name="webKey">The instance to verify.</param> |
| | 226 | | /// <param name="errorMsg">A reference to a variable that will contain an error message. Callers must |
| | 227 | | /// set the variable to <code>null</code>, and examine the value only if this method returns <code>false</code>. |
| | 228 | | public virtual bool IsSecretKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 229 | | { |
| | 230 | | throw ThrowDefaultForSecretKeyCrypto( nameof( IsSecretKeyValid ) ); |
| | 231 | | } |
| | 232 | |
|
| | 233 | | private Exception ThrowDefaultForSecretKeyCrypto( string methodName ) |
| | 234 | | { |
| | 235 | | if ( HasSecretKey ) |
| | 236 | | throw new NotImplementedException( $"Type {GetType().Name} is a bad implementation. If {nameof( HasSecre |
| | 237 | |
|
| | 238 | | throw new InvalidOperationException( $"Type {GetType().Name} is not intended to keys that have a secret comp |
| | 239 | | } |
| | 240 | |
|
| | 241 | | private static volatile SortedSet<string> _validOperations; |
| | 242 | |
|
| | 243 | | public static bool IsOperationValid( string opName ) |
| | 244 | | { |
| | 245 | | if ( _validOperations == null ) |
| | 246 | | { |
| | 247 | | // No lock here; we accept multiple threads initializing. |
| | 248 | | var validOperations = new SortedSet<string>(); |
| | 249 | |
|
| | 250 | | foreach ( var op in JsonWebKeyOperation.AllOperations ) |
| | 251 | | validOperations.Add( op ); |
| | 252 | |
|
| | 253 | | _validOperations = validOperations; |
| | 254 | | } |
| | 255 | |
|
| | 256 | | // No lock here; collection is read-only at this time. |
| | 257 | | return _validOperations.Contains( opName ); |
| | 258 | | } |
| | 259 | |
|
| | 260 | | private volatile SortedSet<string> _compatibleOperations; |
| | 261 | |
|
| | 262 | | public bool IsOperationCompatible( string opName ) |
| | 263 | | { |
| | 264 | | if ( _compatibleOperations == null ) |
| | 265 | | { |
| | 266 | | // No lock here; we accept multiple threads initializing. |
| | 267 | | var compatibleOperations = new SortedSet<string>(); |
| | 268 | |
|
| | 269 | | AddCompatibleOperations( compatibleOperations ); |
| | 270 | |
|
| | 271 | | _compatibleOperations = compatibleOperations; |
| | 272 | | } |
| | 273 | |
|
| | 274 | | // No lock here; collection is read-only at this time. |
| | 275 | | return _compatibleOperations.Contains( opName ); |
| | 276 | | } |
| | 277 | |
|
| | 278 | | /// <summary> |
| | 279 | | /// Adds to the specified collection all operations that can be performed with keys whose type is handled by |
| | 280 | | /// this object. |
| | 281 | | /// </summary> |
| | 282 | | /// For instance, if keys can only be used for digital signatures, this method should add only |
| | 283 | | /// <see cref="JsonWebKeyOperation.Sign"/> and <see cref="JsonWebKeyOperation.Verify"/>. |
| | 284 | | protected abstract void AddCompatibleOperations( ICollection<string> compatibleOperations ); |
| | 285 | |
|
| | 286 | | private HashSet<string> _usedProperties; |
| | 287 | |
|
| | 288 | | public bool IsPropertyUsed( string propName ) |
| | 289 | | { |
| | 290 | | if ( _usedProperties == null ) |
| | 291 | | { |
| | 292 | | // No lock here; we accept multiple threads initializing. |
| | 293 | | var usedProperties = new HashSet<string>(); |
| | 294 | |
|
| | 295 | | AddUsedProperties( usedProperties ); |
| | 296 | |
|
| | 297 | | usedProperties.Add( JsonWebKey.Property_Kid ); |
| | 298 | | usedProperties.Add( JsonWebKey.Property_Kty ); |
| | 299 | | usedProperties.Add( JsonWebKey.Property_KeyOps ); |
| | 300 | |
|
| | 301 | | _usedProperties = usedProperties; |
| | 302 | | } |
| | 303 | |
|
| | 304 | | // No lock here; collection is read-only at this point. |
| | 305 | | return _usedProperties.Contains( propName ); |
| | 306 | | } |
| | 307 | |
|
| | 308 | | /// <summary> |
| | 309 | | /// Adds to the specified collection all JsonWebKey properties that are useful to keys whose type is handled by |
| | 310 | | /// this object. |
| | 311 | | /// </summary> |
| | 312 | | /// <para>This method must add JSON property names, such as <code>"crv"</code>, <code>"p"</code>, etc. It must n |
| | 313 | | /// C# property names.</para> |
| | 314 | | /// <para>This method doesn't have to add <code>"kid"</code>, <code>"kty"</code> and <code>"key_ops"</code>. |
| | 315 | | /// Thes properties are assumed to be useful to all keys.</para>. |
| | 316 | | protected abstract void AddUsedProperties( ICollection<string> usedProperties ); |
| | 317 | |
|
| | 318 | | [Flags] |
| | 319 | | public enum Options |
| | 320 | | { |
| | 321 | | /// <summary> |
| | 322 | | /// Use this value if you don't want to specify any other. |
| | 323 | | /// </summary> |
| | 324 | | None = 0, |
| | 325 | |
|
| | 326 | | /// <summary> |
| | 327 | | /// Fails if any private key material is present. Use this to defend against leakage. |
| | 328 | | /// </summary> |
| | 329 | | /// This value is only used for keys that support public key cryptography. It's ignored in other key types. |
| | 330 | | DenyPrivateKey /*********/ = 1 << 0, |
| | 331 | |
|
| | 332 | | /// <summary> |
| | 333 | | /// Fails if private key material is not fully present. Use this before storing or importing a JsonWebKey |
| | 334 | | /// value into a subsystem that needs to keep the private key. |
| | 335 | | /// </summary> |
| | 336 | | /// This value is only used for keys that support public key cryptography. It's ignored in other key types. |
| | 337 | | RequirePrivateKey /******/ = 1 << 1, |
| | 338 | |
|
| | 339 | | /// <summary> |
| | 340 | | /// Fails if there the <code>"key_ops"</code> value of the verified key contains an incompatible operation. |
| | 341 | | /// </summary> |
| | 342 | | DenyIncompatibleOperations = 1 << 2, |
| | 343 | |
|
| | 344 | | /// <summary> |
| | 345 | | /// Fails if the JsonWebKey object describes values at properties that are not used by the corresponding key |
| | 346 | | /// Use this to defend against properties incorrectly set, and also some forms of leakage. |
| | 347 | | /// </summary> |
| | 348 | | DenyExtraneousFields /***/ = 1 << 3, |
| | 349 | |
|
| | 350 | | /// <summary> |
| | 351 | | /// Reserved for future use. |
| | 352 | | /// </summary> |
| | 353 | | VerifyDecrypt /**********/ = 1 << 10, |
| | 354 | |
|
| | 355 | | /// <summary> |
| | 356 | | /// Reserved for future use. |
| | 357 | | /// </summary> |
| | 358 | | VerifySign /*************/ = 1 << 11, |
| | 359 | |
|
| | 360 | | /// <summary> |
| | 361 | | /// Do not return <code>false</code> if the verification fails; throws an exception instead. |
| | 362 | | /// </summary> |
| | 363 | | ThrowException /*********/ = 1 << 20 |
| | 364 | | } |
| | 365 | |
|
| | 366 | | /// <summary> |
| | 367 | | /// Verifies the specified JsonWebKey instance. |
| | 368 | | /// </summary> |
| | 369 | | /// <para>Verification first examines the <see cref="JsonWebKey.Kty"/> property to select a verifier instance |
| | 370 | | /// (for more information, see the <see cref="Register"/> method). If a verifier is found, it's used to check |
| | 371 | | /// if the key conforms to the corresponding key type.</para> |
| | 372 | | /// <param name="webKey">The instance to verify.</param> |
| | 373 | | /// <param name="options">Tells how verification is to behave.</param> |
| | 374 | | /// <param name="error">A reference to a variable that will tell the error message, if verification fails. This |
| | 375 | | /// is only set if the method returns <code>false</code>. If the method returns <code>true</code> or throws |
| | 376 | | /// an exception, the <paramref name="error"/> will not me modified.</param> |
| | 377 | | /// <returns><code>true</code> if the JsonWebKey value is valid, <code>false otherwise</code>.</returns> |
| | 378 | | /// <exception cref="ArgumentNullException">If the <paramref name="webKey"/> parameter is null.</exception> |
| | 379 | | /// <exception cref="ArgumentException">If the <paramref name="options"/> parameter contains invalid options.</e |
| | 380 | | /// <exception cref="JsonWebKeyVerificationException">If the JsonWebKey object is invalid and the option |
| | 381 | | /// <see cref="Options.ThrowException"/> was specified.</exception> |
| | 382 | | /// <seealso cref="Options"/> |
| | 383 | | public bool Verify( JsonWebKey webKey, Options options, ref string error ) |
| | 384 | | { |
| | 385 | | if ( webKey == null ) |
| | 386 | | throw new ArgumentNullException( nameof( webKey ) ); |
| | 387 | |
|
| | 388 | | if ( options.HasFlag( Options.DenyPrivateKey ) && options.HasFlag( Options.RequirePrivateKey ) ) |
| | 389 | | throw new ArgumentException( $"Cannot use {Options.DenyPrivateKey} and {Options.RequirePrivateKey} at sa |
| | 390 | |
|
| | 391 | | if ( options.HasFlag( Options.VerifyDecrypt ) || options.HasFlag( Options.VerifySign ) ) |
| | 392 | | throw new NotImplementedException(); |
| | 393 | |
|
| | 394 | | if ( !VerifyNotNullOrWhiteSpace( webKey.Kty, JsonWebKey.Property_Kty, options, ref error ) ) |
| | 395 | | return false; |
| | 396 | |
|
| | 397 | | if ( webKey.Kty != Kty ) |
| | 398 | | return SetError( options, ref error, $"Expected {JsonWebKey.Property_Kty} to be \"{Kty}\", but found som |
| | 399 | |
|
| | 400 | | if ( IsPublicKeyCrypto ) |
| | 401 | | { |
| | 402 | | if ( !VerifyPublicKey( this, webKey, options, ref error ) ) |
| | 403 | | return false; |
| | 404 | |
|
| | 405 | | if ( options.HasFlag( Options.DenyPrivateKey ) && !VerifyNoPrivateKey( this, webKey, options, ref error |
| | 406 | | return false; |
| | 407 | |
|
| | 408 | | if ( options.HasFlag( Options.RequirePrivateKey ) && !VerifyPrivateKey( this, webKey, options, ref error |
| | 409 | | return false; |
| | 410 | | } |
| | 411 | |
|
| | 412 | | if ( IsSymmetricKeyCrypto ) |
| | 413 | | { |
| | 414 | | if ( !VerifySymmetricKey( this, webKey, options, ref error ) ) |
| | 415 | | return false; |
| | 416 | | } |
| | 417 | |
|
| | 418 | | if ( HasSecretKey && !VerifySecretKey( this, webKey, options, ref error ) ) |
| | 419 | | return false; |
| | 420 | |
|
| | 421 | | if ( options.HasFlag( Options.DenyIncompatibleOperations ) && !VerifyOperationsAreCompatible( this, webKey, |
| | 422 | | return false; |
| | 423 | |
|
| | 424 | | if ( !options.HasFlag( Options.DenyIncompatibleOperations ) && !VerifyOperationsAreValid( webKey, options, r |
| | 425 | | return false; |
| | 426 | |
|
| | 427 | | if ( options.HasFlag( Options.DenyExtraneousFields ) && !VerifyNoExtraneousFields( this, webKey, options, re |
| | 428 | | return false; |
| | 429 | |
|
| | 430 | | return true; |
| | 431 | | } |
| | 432 | |
|
| | 433 | | /// <summary> |
| | 434 | | /// Verifies the specified JsonWebKey instance according to <see cref="JsonWebKey.Kty"/>. |
| | 435 | | /// </summary> |
| | 436 | | /// This method selects a verifier based on the value of <see cref="JsonWebKey.Kty"/>, |
| | 437 | | /// then calls the verifier's <see cref="Verify"/> method. |
| | 438 | | /// <param name="webKey"></param> |
| | 439 | | /// <param name="options"></param> |
| | 440 | | /// <param name="error"></param> |
| | 441 | | /// <seealso cref="Verify"/> |
| | 442 | | public static bool VerifyByKeyType( JsonWebKey webKey, Options options, ref string error ) |
| | 443 | | { |
| | 444 | | if ( webKey == null ) |
| | 445 | | throw new ArgumentNullException( nameof( webKey ) ); |
| | 446 | |
|
| | 447 | | if ( !VerifyNotNullOrWhiteSpace( webKey.Kty, JsonWebKey.Property_Kty, options, ref error ) ) |
| | 448 | | return false; |
| | 449 | |
|
| | 450 | | JsonWebKeyVerifier verifier; |
| | 451 | |
|
| | 452 | | lock ( _verifiersLock ) |
| | 453 | | { |
| | 454 | | InitVerifiers(); |
| | 455 | | if ( !VerifyEnum( webKey.Kty, JsonWebKey.Property_Kty, _verifiers, out verifier, options, ref error ) ) |
| | 456 | | return false; |
| | 457 | | } |
| | 458 | |
|
| | 459 | | return verifier.Verify( webKey, options, ref error ); |
| | 460 | | } |
| | 461 | |
|
| | 462 | | private static readonly object _verifiersLock = new object(); |
| | 463 | |
|
| | 464 | | private static volatile SortedDictionary<string, JsonWebKeyVerifier> _verifiers; |
| | 465 | |
|
| | 466 | | private static void InitVerifiers() |
| | 467 | | { |
| | 468 | | if ( _verifiers != null ) |
| | 469 | | return; |
| | 470 | |
|
| | 471 | | var verifiers = new SortedDictionary<string, JsonWebKeyVerifier>(); |
| | 472 | |
|
| | 473 | | RegisterAt( verifiers, OctetKeyVerifier.Instance ); |
| | 474 | | RegisterAt( verifiers, EllipticCurveKeyVerifier.Instance ); |
| | 475 | | RegisterAt( verifiers, EllipticCurveHsmKeyVerifier.Instance ); |
| | 476 | | RegisterAt( verifiers, RsaKeyVerifier.Instance ); |
| | 477 | | RegisterAt( verifiers, RsaHsmKeyVerifier.Instance ); |
| | 478 | |
|
| | 479 | | _verifiers = verifiers; |
| | 480 | | } |
| | 481 | |
|
| | 482 | | /// <summary> |
| | 483 | | /// Registers a verifier for a <see cref="Kty"/> value. |
| | 484 | | /// </summary> |
| | 485 | | /// Throws exception is a previous verifier for same <see cref="Kty"/> value is already registered. |
| | 486 | | /// There is no need to register verifiers for values described on <see cref="JsonWebKeyType"/>. |
| | 487 | | /// <param name="verifier">The verifier to register.</param> |
| | 488 | | /// <seealso cref="GetVerifier"/> |
| | 489 | | public static void Register( JsonWebKeyVerifier verifier ) |
| | 490 | | { |
| | 491 | | if ( verifier == null ) |
| | 492 | | throw new ArgumentNullException( nameof( verifier ) ); |
| | 493 | |
|
| | 494 | | lock ( _verifiersLock ) |
| | 495 | | { |
| | 496 | | InitVerifiers(); |
| | 497 | | RegisterAt( _verifiers, verifier ); |
| | 498 | | } |
| | 499 | | } |
| | 500 | |
|
| | 501 | | private static void RegisterAt( IDictionary<string, JsonWebKeyVerifier> verifiers, JsonWebKeyVerifier verifier ) |
| | 502 | | { |
| | 503 | | Debug.Assert( verifiers != null ); |
| | 504 | |
|
| | 505 | | if ( verifiers.TryGetValue( verifier.Kty, out JsonWebKeyVerifier _ ) ) |
| | 506 | | throw new InvalidOperationException( $"Value already registered for \"{verifier.Kty}\"." ); |
| | 507 | |
|
| | 508 | | verifiers[verifier.Kty] = verifier; |
| | 509 | | } |
| | 510 | |
|
| | 511 | | /// <summary> |
| | 512 | | /// Returns the verifier registered for the specified kty value, or null if the kty value was not registered. |
| | 513 | | /// </summary> |
| | 514 | | /// This method never returns null for values described on <see cref="JsonWebKeyType"/>. |
| | 515 | | /// <seealso cref="Register"/> |
| | 516 | | public static JsonWebKeyVerifier GetVerifier( string kty ) |
| | 517 | | { |
| | 518 | | if ( string.IsNullOrWhiteSpace( kty ) ) |
| | 519 | | throw new ArgumentNullException( nameof( kty ) ); |
| | 520 | |
|
| | 521 | | lock ( _verifiersLock ) |
| | 522 | | { |
| | 523 | | InitVerifiers(); |
| | 524 | | _verifiers.TryGetValue( kty, out JsonWebKeyVerifier result ); |
| | 525 | | return result; |
| | 526 | | } |
| | 527 | | } |
| | 528 | |
|
| | 529 | | private static bool VerifyPublicKey( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, ref string |
| | 530 | | { |
| | 531 | | return VerifyKeyParameters( |
| | 532 | | "public", |
| | 533 | | verifier.IsPublicKeyComplete, |
| | 534 | | verifier.IsPublicKeyValid, |
| | 535 | | webKey, |
| | 536 | | options, |
| | 537 | | ref error ); |
| | 538 | | } |
| | 539 | |
|
| | 540 | | private static bool VerifyNoPrivateKey( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, ref str |
| | 541 | | { |
| | 542 | | ICollection<string> specifiedProps = null; |
| | 543 | | if ( !verifier.IsAnyPrivateKeyParamSpecified( webKey, ref specifiedProps ) ) |
| | 544 | | return true; |
| | 545 | |
|
| | 546 | | if ( specifiedProps == null || specifiedProps.Count == 0 ) |
| | 547 | | return SetError( options, ref error, "Private key parameters must not be specified." ); |
| | 548 | |
|
| | 549 | | return SetError( options, ref error, $"Private key parameters must not be specified: {SurroundWithQuotes( sp |
| | 550 | | } |
| | 551 | |
|
| | 552 | | private static bool VerifyPrivateKey( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, ref strin |
| | 553 | | { |
| | 554 | | return VerifyKeyParameters( |
| | 555 | | "private", |
| | 556 | | verifier.IsPrivateKeyComplete, |
| | 557 | | verifier.IsPrivateKeyValid, |
| | 558 | | webKey, |
| | 559 | | options, |
| | 560 | | ref error ); |
| | 561 | | } |
| | 562 | |
|
| | 563 | | private static bool VerifySymmetricKey( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, ref str |
| | 564 | | { |
| | 565 | | return VerifyKeyParameters( |
| | 566 | | "symmetric", |
| | 567 | | verifier.IsSymmetricKeyComplete, |
| | 568 | | verifier.IsSymmetricKeyValid, |
| | 569 | | webKey, |
| | 570 | | options, |
| | 571 | | ref error ); |
| | 572 | | } |
| | 573 | |
|
| | 574 | | private static bool VerifySecretKey( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, ref string |
| | 575 | | { |
| | 576 | | return VerifyKeyParameters( |
| | 577 | | "secret", |
| | 578 | | verifier.IsSecretKeyComplete, |
| | 579 | | verifier.IsSecretKeyValid, |
| | 580 | | webKey, |
| | 581 | | options, |
| | 582 | | ref error ); |
| | 583 | | } |
| | 584 | |
|
| | 585 | | private delegate bool IsCompleteProc( JsonWebKey webKey, ref ICollection<string> missingProps ); |
| | 586 | |
|
| | 587 | | private delegate bool IsValidProc( JsonWebKey webKey, ref string errorMsg ); |
| | 588 | |
|
| | 589 | | private static bool VerifyKeyParameters( string name, IsCompleteProc isCompleteProc, IsValidProc isValidProc, Js |
| | 590 | | { |
| | 591 | | ICollection<string> missingParams = null; |
| | 592 | | if ( !isCompleteProc( webKey, ref missingParams ) ) |
| | 593 | | { |
| | 594 | | if ( missingParams == null || missingParams.Count == 0 ) |
| | 595 | | return SetError( options, ref error, $"Missing {name} key parameters." ); |
| | 596 | |
|
| | 597 | | return SetError( options, ref error, $"Missing {name} key parameters: {SurroundWithQuotes( missingParams |
| | 598 | | } |
| | 599 | |
|
| | 600 | | string errorMsg = null; |
| | 601 | | if ( !isValidProc( webKey, ref errorMsg ) ) |
| | 602 | | { |
| | 603 | | if ( errorMsg != null ) |
| | 604 | | errorMsg = $"Invalid {name} key parameters: {errorMsg}"; |
| | 605 | | else |
| | 606 | | errorMsg = $"Invalid {name} key parameters."; |
| | 607 | |
|
| | 608 | | return SetError( options, ref error, errorMsg ); |
| | 609 | | } |
| | 610 | |
|
| | 611 | | return true; |
| | 612 | | } |
| | 613 | |
|
| | 614 | | private static bool VerifyOperationsAreValid( JsonWebKey webKey, Options options, ref string error ) |
| | 615 | | { |
| | 616 | | if ( webKey.KeyOps == null ) |
| | 617 | | return true; |
| | 618 | |
|
| | 619 | | StringBuilder invalid = null; |
| | 620 | |
|
| | 621 | | foreach ( var keyOp in webKey.KeyOps ) |
| | 622 | | if ( !IsOperationValid( keyOp ) ) |
| | 623 | | { |
| | 624 | | if ( invalid == null ) |
| | 625 | | invalid = new StringBuilder(); |
| | 626 | | else |
| | 627 | | invalid.Append( ", " ); |
| | 628 | |
|
| | 629 | | invalid.Append( '"' ).Append( keyOp ).Append( '"' ); |
| | 630 | | } |
| | 631 | |
|
| | 632 | | if ( invalid != null ) |
| | 633 | | { |
| | 634 | | var validOps = SurroundWithQuotes( _validOperations ); |
| | 635 | | return SetError( options, ref error, $"Found invalid operations: {invalid}. Valid operations are: {valid |
| | 636 | | } |
| | 637 | |
|
| | 638 | | return true; |
| | 639 | | } |
| | 640 | |
|
| | 641 | | private static bool VerifyOperationsAreCompatible( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options optio |
| | 642 | | { |
| | 643 | | if ( webKey.KeyOps == null ) |
| | 644 | | return true; |
| | 645 | |
|
| | 646 | | StringBuilder incompatible = null; |
| | 647 | |
|
| | 648 | | foreach ( var keyOp in webKey.KeyOps ) |
| | 649 | | if ( !verifier.IsOperationCompatible( keyOp ) ) |
| | 650 | | { |
| | 651 | | if ( incompatible == null ) |
| | 652 | | incompatible = new StringBuilder(); |
| | 653 | | else |
| | 654 | | incompatible.Append( ", " ); |
| | 655 | |
|
| | 656 | | incompatible.Append( '"' ).Append( keyOp ).Append( '"' ); |
| | 657 | | } |
| | 658 | |
|
| | 659 | | if ( incompatible != null ) |
| | 660 | | { |
| | 661 | | var compatibleOps = SurroundWithQuotes( verifier._compatibleOperations ); |
| | 662 | | return SetError( options, ref error, $"Found invalid or incompatible operations: {incompatible}. Valid a |
| | 663 | | } |
| | 664 | |
|
| | 665 | | return true; |
| | 666 | | } |
| | 667 | |
|
| | 668 | | private static bool VerifyNoExtraneousFields( JsonWebKeyVerifier verifier, JsonWebKey webKey, Options options, r |
| | 669 | | { |
| | 670 | | StringBuilder extraneous = null; |
| | 671 | |
|
| | 672 | | void VerifyProperty( string name, object value ) |
| | 673 | | { |
| | 674 | | if ( value == null || verifier.IsPropertyUsed( name ) ) |
| | 675 | | return; |
| | 676 | |
|
| | 677 | | if ( extraneous == null ) |
| | 678 | | extraneous = new StringBuilder(); |
| | 679 | | else |
| | 680 | | extraneous.Append( ", " ); |
| | 681 | |
|
| | 682 | | extraneous.Append( '"' ).Append( name ).Append( '"' ); |
| | 683 | | } |
| | 684 | |
|
| | 685 | | webKey.VisitProperties( VerifyProperty ); |
| | 686 | |
|
| | 687 | | if ( extraneous != null ) |
| | 688 | | return SetError( options, ref error, $"Extraneous properties: {extraneous}" ); |
| | 689 | |
|
| | 690 | | return true; |
| | 691 | | } |
| | 692 | |
|
| | 693 | | private static bool VerifyEnum<T>( string value, string name, IDictionary<string, T> dictionary, out T item, Opt |
| | 694 | | { |
| | 695 | | if ( !dictionary.TryGetValue( value, out item ) ) |
| | 696 | | return SetError( options, ref error, $"Expected {name} to be one of {SurroundWithQuotes( dictionary.Keys |
| | 697 | |
|
| | 698 | | if ( item == null ) |
| | 699 | | throw new InvalidOperationException( $"Dictionary for {name} is returning null for \"{value}\"." ); |
| | 700 | |
|
| | 701 | | return true; |
| | 702 | | } |
| | 703 | |
|
| | 704 | | private static bool VerifyNotNullOrWhiteSpace( string value, string name, Options options, ref string error ) |
| | 705 | | { |
| | 706 | | if ( string.IsNullOrWhiteSpace( value ) ) |
| | 707 | | return SetError( options, ref error, $"A value for {name} is mandatory." ); |
| | 708 | |
|
| | 709 | | return true; |
| | 710 | | } |
| | 711 | |
|
| | 712 | | private static bool SetError( Options options, ref string error, string message ) |
| | 713 | | { |
| | 714 | | if ( options.HasFlag( Options.ThrowException ) ) |
| | 715 | | throw new JsonWebKeyVerificationException( message ); |
| | 716 | | error = message; |
| | 717 | | return false; |
| | 718 | | } |
| | 719 | |
|
| | 720 | | /// <summary> |
| | 721 | | /// Helper method that surrounds string values with double-quotes. |
| | 722 | | /// </summary> |
| | 723 | | /// For instance, the strings Foo, Bar cause this method to return <code>"Foo", "Bar"</code>. |
| | 724 | | protected static string SurroundWithQuotes( ICollection<string> items ) |
| | 725 | | { |
| | 726 | | return "\"" + string.Join( "\", \"", items ) + "\""; |
| | 727 | | } |
| | 728 | |
|
| | 729 | | /// <summary> |
| | 730 | | /// Helper method that joins the operation of creating a collection (if required) and adding an item to it. |
| | 731 | | /// </summary> |
| | 732 | | /// If the collection is null, this method creates one of type <see cref="List{T}"/>. Then it adds the specified |
| | 733 | | protected static void AddItem<T>( ref ICollection<T> items, T newItem ) |
| | 734 | | { |
| | 735 | | if ( items == null ) |
| | 736 | | items = new List<T>(); |
| | 737 | | items.Add( newItem ); |
| | 738 | | } |
| | 739 | |
|
| | 740 | | /// <summary> |
| | 741 | | /// Helper method that validates the size of a byte array. |
| | 742 | | /// </summary> |
| | 743 | | /// <para>A valid array meets the following criteria:</para> |
| | 744 | | /// <list type="bullet"> |
| | 745 | | /// <item><description>is not <code>null</code>;</description></item> |
| | 746 | | /// <item><description>the length is at least <paramref name="requiredSize"/>; and</description></item> |
| | 747 | | /// <item><description>excess leading bytes are all zeros.</description></item> |
| | 748 | | /// </list> |
| | 749 | | /// <param name="value">The array to validate.</param> |
| | 750 | | /// <param name="name">The array name, which may be used to build error messages.</param> |
| | 751 | | /// <param name="requiredSize">The required size, in bytes.</param> |
| | 752 | | /// <param name="errorMsg">A reference to a variable that will contain the error message. This is only set |
| | 753 | | /// if the method returns <code>false</code>.</param> |
| | 754 | | /// <returns><code>true</code> if the array has a valid size; <code>false otherwise</code>.</returns> |
| | 755 | | protected static bool ValidateKeyParameterSize( byte[] value, string name, int requiredSize, ref string errorMsg |
| | 756 | | { |
| | 757 | | if ( value == null || value.Length < requiredSize ) |
| | 758 | | { |
| | 759 | | var sizeDesc = value == null ? "null" : value.Length.ToString(); |
| | 760 | | errorMsg = $"Expected {name} to have at least {requiredSize} bytes, but found {sizeDesc}."; |
| | 761 | | return false; |
| | 762 | | } |
| | 763 | |
|
| | 764 | | var excess = value.Length - requiredSize; |
| | 765 | | for ( var i = 0; i < excess; ++i ) |
| | 766 | | { |
| | 767 | | if ( value[i] != 0 ) |
| | 768 | | errorMsg = $"Expected {name} to have at most {requiredSize} bytes, but found {requiredSize + excess} |
| | 769 | | --excess; |
| | 770 | | } |
| | 771 | |
|
| | 772 | | return true; |
| | 773 | | } |
| | 774 | | } |
| | 775 | |
|
| | 776 | | internal sealed class OctetKeyVerifier : JsonWebKeyVerifier |
| | 777 | | { |
| | 778 | | public static JsonWebKeyVerifier Instance { get; } = new OctetKeyVerifier(); |
| | 779 | |
|
| | 780 | | private OctetKeyVerifier() : base( JsonWebKeyType.Octet ) |
| | 781 | | { |
| | 782 | | } |
| | 783 | |
|
| | 784 | | public override bool IsPublicKeyCrypto => false; |
| | 785 | | public override bool IsSymmetricKeyCrypto => true; |
| | 786 | | public override bool HasSecretKey => false; |
| | 787 | |
|
| | 788 | | protected override void AddCompatibleOperations( ICollection<string> compatibleOperations ) |
| | 789 | | { |
| | 790 | | compatibleOperations.Add( JsonWebKeyOperation.Encrypt ); |
| | 791 | | compatibleOperations.Add( JsonWebKeyOperation.Decrypt ); |
| | 792 | | compatibleOperations.Add( JsonWebKeyOperation.Wrap ); |
| | 793 | | compatibleOperations.Add( JsonWebKeyOperation.Unwrap ); |
| | 794 | | } |
| | 795 | |
|
| | 796 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 797 | | { |
| | 798 | | usedProperties.Add( JsonWebKey.Property_K ); |
| | 799 | | } |
| | 800 | |
|
| | 801 | | public override bool IsSymmetricKeyComplete( JsonWebKey arg, ref ICollection<string> missingProps ) |
| | 802 | | { |
| | 803 | | if ( arg.K == null || arg.K.Length == 0 ) |
| | 804 | | { |
| | 805 | | AddItem( ref missingProps, JsonWebKey.Property_K ); |
| | 806 | | return false; |
| | 807 | | } |
| | 808 | |
|
| | 809 | | return true; |
| | 810 | | } |
| | 811 | |
|
| | 812 | | public override bool IsSymmetricKeyValid( JsonWebKey arg, ref string errorMsg ) |
| | 813 | | { |
| | 814 | | return true; |
| | 815 | | } |
| | 816 | | } |
| | 817 | |
|
| | 818 | | internal abstract class EllipticCurveKeyVerifierBase : JsonWebKeyVerifier |
| | 819 | | { |
| | 820 | | protected EllipticCurveKeyVerifierBase( string kty ) : base( kty ) |
| | 821 | | { |
| | 822 | | } |
| | 823 | |
|
| | 824 | | public override bool IsPublicKeyCrypto => true; |
| | 825 | | public override bool IsSymmetricKeyCrypto => false; |
| | 826 | |
|
| | 827 | | protected override void AddCompatibleOperations( ICollection<string> compatibleOperations ) |
| | 828 | | { |
| | 829 | | compatibleOperations.Add( JsonWebKeyOperation.Sign ); |
| | 830 | | compatibleOperations.Add( JsonWebKeyOperation.Verify ); |
| | 831 | | } |
| | 832 | |
|
| | 833 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 834 | | { |
| | 835 | | usedProperties.Add( JsonWebKey.Property_Crv ); |
| | 836 | | usedProperties.Add( JsonWebKey.Property_X ); |
| | 837 | | usedProperties.Add( JsonWebKey.Property_Y ); |
| | 838 | | } |
| | 839 | |
|
| | 840 | | public override bool IsPublicKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 841 | | { |
| | 842 | | var result = true; |
| | 843 | |
|
| | 844 | | if ( string.IsNullOrWhiteSpace( webKey.CurveName ) ) |
| | 845 | | { |
| | 846 | | AddItem( ref missingProps, JsonWebKey.Property_Crv ); |
| | 847 | | result = false; |
| | 848 | | } |
| | 849 | |
|
| | 850 | | if ( webKey.X == null || webKey.X.Length == 0 ) |
| | 851 | | { |
| | 852 | | AddItem( ref missingProps, JsonWebKey.Property_X ); |
| | 853 | | result = false; |
| | 854 | | } |
| | 855 | |
|
| | 856 | | if ( webKey.Y == null || webKey.Y.Length == 0 ) |
| | 857 | | { |
| | 858 | | AddItem( ref missingProps, JsonWebKey.Property_Y ); |
| | 859 | | result = false; |
| | 860 | | } |
| | 861 | |
|
| | 862 | | return result; |
| | 863 | | } |
| | 864 | |
|
| | 865 | | public override bool IsPublicKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 866 | | { |
| | 867 | | var requiredSize = JsonWebKeyCurveName.GetKeyParameterSize( webKey.CurveName ); |
| | 868 | |
|
| | 869 | | if ( requiredSize < 0 ) |
| | 870 | | { |
| | 871 | | errorMsg = $"Unsupported curve: \"{webKey.CurveName}\". Supported curves are: {SurroundWithQuotes( JsonW |
| | 872 | | return false; |
| | 873 | | } |
| | 874 | |
|
| | 875 | | if ( !ValidateKeyParameterSize( webKey.X, nameof( webKey.X ), requiredSize, ref errorMsg ) ) |
| | 876 | | return false; |
| | 877 | |
|
| | 878 | | if ( !ValidateKeyParameterSize( webKey.Y, nameof( webKey.Y ), requiredSize, ref errorMsg ) ) |
| | 879 | | return false; |
| | 880 | |
|
| | 881 | | return true; |
| | 882 | | } |
| | 883 | | } |
| | 884 | |
|
| | 885 | | internal sealed class EllipticCurveKeyVerifier : EllipticCurveKeyVerifierBase |
| | 886 | | { |
| | 887 | | public static JsonWebKeyVerifier Instance { get; } = new EllipticCurveKeyVerifier(); |
| | 888 | |
|
| | 889 | | private EllipticCurveKeyVerifier() : base( JsonWebKeyType.EllipticCurve ) |
| | 890 | | { |
| | 891 | | } |
| | 892 | |
|
| | 893 | | public override bool HasSecretKey => false; |
| | 894 | |
|
| | 895 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 896 | | { |
| | 897 | | base.AddUsedProperties( usedProperties ); |
| | 898 | | usedProperties.Add( JsonWebKey.Property_D ); |
| | 899 | | } |
| | 900 | |
|
| | 901 | | public override bool IsPrivateKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 902 | | { |
| | 903 | | if ( webKey.D == null || webKey.D.Length == 0 ) |
| | 904 | | { |
| | 905 | | AddItem( ref missingProps, JsonWebKey.Property_D ); |
| | 906 | | return false; |
| | 907 | | } |
| | 908 | |
|
| | 909 | | return true; |
| | 910 | | } |
| | 911 | |
|
| | 912 | | public override bool IsPrivateKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 913 | | { |
| | 914 | | var requiredSize = JsonWebKeyCurveName.GetKeyParameterSize( webKey.CurveName ); |
| | 915 | |
|
| | 916 | | if ( requiredSize < 0 ) |
| | 917 | | { |
| | 918 | | errorMsg = $"Unsupported curve: \"{webKey.CurveName}\". Supported curves are: {SurroundWithQuotes( JsonW |
| | 919 | | return false; |
| | 920 | | } |
| | 921 | |
|
| | 922 | | if ( !ValidateKeyParameterSize( webKey.D, nameof( webKey.D ), requiredSize, ref errorMsg ) ) |
| | 923 | | return false; |
| | 924 | |
|
| | 925 | | return true; |
| | 926 | | } |
| | 927 | | } |
| | 928 | |
|
| | 929 | | internal sealed class EllipticCurveHsmKeyVerifier : EllipticCurveKeyVerifierBase |
| | 930 | | { |
| 4 | 931 | | public static JsonWebKeyVerifier Instance { get; } = new EllipticCurveHsmKeyVerifier(); |
| | 932 | |
|
| 2 | 933 | | private EllipticCurveHsmKeyVerifier() : base( JsonWebKeyType.EllipticCurveHsm ) |
| | 934 | | { |
| 2 | 935 | | } |
| | 936 | |
|
| 0 | 937 | | public override bool HasSecretKey => true; |
| | 938 | |
|
| | 939 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 940 | | { |
| 0 | 941 | | base.AddUsedProperties( usedProperties ); |
| 0 | 942 | | usedProperties.Add( JsonWebKey.Property_T ); |
| 0 | 943 | | } |
| | 944 | |
|
| | 945 | | public override bool IsPrivateKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 946 | | { |
| 0 | 947 | | return true; |
| | 948 | | } |
| | 949 | |
|
| | 950 | | public override bool IsPrivateKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 951 | | { |
| 0 | 952 | | return true; |
| | 953 | | } |
| | 954 | |
|
| | 955 | | public override bool IsSecretKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 956 | | { |
| 0 | 957 | | if ( webKey.T == null || webKey.T.Length == 0 ) |
| | 958 | | { |
| 0 | 959 | | AddItem( ref missingProps, JsonWebKey.Property_T ); |
| 0 | 960 | | return false; |
| | 961 | | } |
| | 962 | |
|
| 0 | 963 | | return true; |
| | 964 | | } |
| | 965 | |
|
| | 966 | | public override bool IsSecretKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 967 | | { |
| 0 | 968 | | return true; |
| | 969 | | } |
| | 970 | | } |
| | 971 | |
|
| | 972 | | internal abstract class RsaKeyVerifierBase : JsonWebKeyVerifier |
| | 973 | | { |
| | 974 | | protected RsaKeyVerifierBase( string kty ) : base( kty ) |
| | 975 | | { |
| | 976 | | } |
| | 977 | |
|
| | 978 | | public override bool IsPublicKeyCrypto => true; |
| | 979 | | public override bool IsSymmetricKeyCrypto => false; |
| | 980 | |
|
| | 981 | | protected override void AddCompatibleOperations( ICollection<string> compatibleOperations ) |
| | 982 | | { |
| | 983 | | compatibleOperations.Add( JsonWebKeyOperation.Encrypt ); |
| | 984 | | compatibleOperations.Add( JsonWebKeyOperation.Decrypt ); |
| | 985 | | compatibleOperations.Add( JsonWebKeyOperation.Wrap ); |
| | 986 | | compatibleOperations.Add( JsonWebKeyOperation.Unwrap ); |
| | 987 | | compatibleOperations.Add( JsonWebKeyOperation.Sign ); |
| | 988 | | compatibleOperations.Add( JsonWebKeyOperation.Verify ); |
| | 989 | | } |
| | 990 | |
|
| | 991 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 992 | | { |
| | 993 | | usedProperties.Add( JsonWebKey.Property_E ); |
| | 994 | | usedProperties.Add( JsonWebKey.Property_N ); |
| | 995 | | } |
| | 996 | |
|
| | 997 | | public override bool IsPublicKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 998 | | { |
| | 999 | | var result = true; |
| | 1000 | |
|
| | 1001 | | if ( webKey.E == null || webKey.E.Length == 0 ) |
| | 1002 | | { |
| | 1003 | | AddItem( ref missingProps, JsonWebKey.Property_E ); |
| | 1004 | | result = false; |
| | 1005 | | } |
| | 1006 | |
|
| | 1007 | | if ( webKey.N == null || webKey.N.Length == 0 ) |
| | 1008 | | { |
| | 1009 | | AddItem( ref missingProps, JsonWebKey.Property_N ); |
| | 1010 | | result = false; |
| | 1011 | | } |
| | 1012 | |
|
| | 1013 | | return result; |
| | 1014 | | } |
| | 1015 | |
|
| | 1016 | | public override bool IsPublicKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 1017 | | { |
| | 1018 | | return true; |
| | 1019 | | } |
| | 1020 | | } |
| | 1021 | |
|
| | 1022 | | internal sealed class RsaKeyVerifier : RsaKeyVerifierBase |
| | 1023 | | { |
| | 1024 | | public static JsonWebKeyVerifier Instance { get; } = new RsaKeyVerifier(); |
| | 1025 | |
|
| | 1026 | | private RsaKeyVerifier() : base( JsonWebKeyType.Rsa ) |
| | 1027 | | { |
| | 1028 | | } |
| | 1029 | |
|
| | 1030 | | public override bool HasSecretKey => false; |
| | 1031 | |
|
| | 1032 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 1033 | | { |
| | 1034 | | base.AddUsedProperties( usedProperties ); |
| | 1035 | | usedProperties.Add( JsonWebKey.Property_D ); |
| | 1036 | | usedProperties.Add( JsonWebKey.Property_DP ); |
| | 1037 | | usedProperties.Add( JsonWebKey.Property_DQ ); |
| | 1038 | | usedProperties.Add( JsonWebKey.Property_P ); |
| | 1039 | | usedProperties.Add( JsonWebKey.Property_Q ); |
| | 1040 | | usedProperties.Add( JsonWebKey.Property_QI ); |
| | 1041 | | } |
| | 1042 | |
|
| | 1043 | | public override bool IsPrivateKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 1044 | | { |
| | 1045 | | var result = true; |
| | 1046 | |
|
| | 1047 | | if ( webKey.D == null || webKey.D.Length == 0 ) |
| | 1048 | | { |
| | 1049 | | AddItem( ref missingProps, JsonWebKey.Property_D ); |
| | 1050 | | result = false; |
| | 1051 | | } |
| | 1052 | |
|
| | 1053 | | if ( webKey.DP == null || webKey.DP.Length == 0 ) |
| | 1054 | | { |
| | 1055 | | AddItem( ref missingProps, JsonWebKey.Property_DP ); |
| | 1056 | | result = false; |
| | 1057 | | } |
| | 1058 | |
|
| | 1059 | | if ( webKey.DQ == null || webKey.DQ.Length == 0 ) |
| | 1060 | | { |
| | 1061 | | AddItem( ref missingProps, JsonWebKey.Property_DQ ); |
| | 1062 | | result = false; |
| | 1063 | | } |
| | 1064 | |
|
| | 1065 | | if ( webKey.P == null || webKey.P.Length == 0 ) |
| | 1066 | | { |
| | 1067 | | AddItem( ref missingProps, JsonWebKey.Property_P ); |
| | 1068 | | result = false; |
| | 1069 | | } |
| | 1070 | |
|
| | 1071 | | if ( webKey.Q == null || webKey.Q.Length == 0 ) |
| | 1072 | | { |
| | 1073 | | AddItem( ref missingProps, JsonWebKey.Property_Q ); |
| | 1074 | | result = false; |
| | 1075 | | } |
| | 1076 | |
|
| | 1077 | | if ( webKey.QI == null || webKey.QI.Length == 0 ) |
| | 1078 | | { |
| | 1079 | | AddItem( ref missingProps, JsonWebKey.Property_QI ); |
| | 1080 | | result = false; |
| | 1081 | | } |
| | 1082 | |
|
| | 1083 | | return result; |
| | 1084 | | } |
| | 1085 | |
|
| | 1086 | | public override bool IsPrivateKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 1087 | | { |
| | 1088 | | return true; |
| | 1089 | | } |
| | 1090 | | } |
| | 1091 | |
|
| | 1092 | | internal sealed class RsaHsmKeyVerifier : RsaKeyVerifierBase |
| | 1093 | | { |
| | 1094 | | public static JsonWebKeyVerifier Instance { get; } = new RsaHsmKeyVerifier(); |
| | 1095 | |
|
| | 1096 | | private RsaHsmKeyVerifier() : base( JsonWebKeyType.RsaHsm ) |
| | 1097 | | { |
| | 1098 | | } |
| | 1099 | |
|
| | 1100 | | public override bool HasSecretKey => true; |
| | 1101 | |
|
| | 1102 | | protected override void AddUsedProperties( ICollection<string> usedProperties ) |
| | 1103 | | { |
| | 1104 | | base.AddUsedProperties( usedProperties ); |
| | 1105 | | usedProperties.Add( JsonWebKey.Property_T ); |
| | 1106 | | } |
| | 1107 | |
|
| | 1108 | | public override bool IsPrivateKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 1109 | | { |
| | 1110 | | return true; |
| | 1111 | | } |
| | 1112 | |
|
| | 1113 | | public override bool IsPrivateKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 1114 | | { |
| | 1115 | | return true; |
| | 1116 | | } |
| | 1117 | |
|
| | 1118 | | public override bool IsSecretKeyComplete( JsonWebKey webKey, ref ICollection<string> missingProps ) |
| | 1119 | | { |
| | 1120 | | if ( webKey.T == null || webKey.T.Length == 0 ) |
| | 1121 | | { |
| | 1122 | | AddItem( ref missingProps, JsonWebKey.Property_T ); |
| | 1123 | | return false; |
| | 1124 | | } |
| | 1125 | |
|
| | 1126 | | return true; |
| | 1127 | | } |
| | 1128 | |
|
| | 1129 | | public override bool IsSecretKeyValid( JsonWebKey webKey, ref string errorMsg ) |
| | 1130 | | { |
| | 1131 | | return true; |
| | 1132 | | } |
| | 1133 | | } |
| | 1134 | | } |