The following values are used with the BCryptGetProperty and BCryptSetProperty functions to identify a property.
- BCRYPT_ALGORITHM_NAME
- L"AlgorithmName"
A null-terminated Unicode string that contains the name of the algorithm.
- BCRYPT_AUTH_TAG_LENGTH
- L"AuthTagLength"
The authentication tag lengths that are supported by the algorithm. This property is a BCRYPT_AUTH_TAG_LENGTHS_STRUCT structure. This property only applies to algorithms.
- BCRYPT_BLOCK_LENGTH
- L"BlockLength"
The size, in bytes, of a cipher block for the algorithm. This property only applies to block cipher algorithms. This data type is a DWORD.
- BCRYPT_BLOCK_SIZE_LIST
- L"BlockSizeList"
A list of the block lengths supported by an encryption algorithm. This data type is an array of DWORDs. The number of elements in the array can be determined by dividing the number of bytes retrieved by the size of a single DWORD.
- BCRYPT_CHAINING_MODE
- L"ChainingMode"
A pointer to a null-terminated Unicode string that represents the chaining mode of the algorithm provider. This can be one of the following values.
| Identifier | Value | Description |
|---|
| BCRYPT_CHAIN_MODE_CBC | L"ChainingModeCBC" | Sets the provider's chaining mode to cipher block chaining. |
| BCRYPT_CHAIN_MODE_CCM | L"ChainingModeCCM" | Sets the provider's chaining mode to counter with CBC-MAC mode (CCM).Windows Vista: This value is supported beginning with Windows Vista with SP1.
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| BCRYPT_CHAIN_MODE_CFB | L"ChainingModeCFB" | Sets the provider's chaining mode to cipher feedback. |
| BCRYPT_CHAIN_MODE_ECB | L"ChainingModeECB" | Sets the provider's chaining mode to electronic codebook. |
| BCRYPT_CHAIN_MODE_GCM | L"ChainingModeGCM" | Sets the provider's chaining mode to Galois/counter mode (GCM).Windows Vista: This value is supported beginning with Windows Vista with SP1.
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| BCRYPT_CHAIN_MODE_NA | L"ChainingModeN/A" | The provider does not support chaining. |
- BCRYPT_DH_PARAMETERS
- L"DHParameters"
Specifies parameters to use with a Diffie-Hellman key. This data type is a pointer to a BCRYPT_DH_PARAMETER_HEADER structure. This property can only be set and must be set for the key before the key is completed.
- BCRYPT_DSA_PARAMETERS
- L"DSAParameters"
Specifies parameters to use with a Diffie-Hellman key. This property is a BCRYPT_DSA_PARAMETER_HEADER structure. This property can only be set and must be set for the key before the key is completed.
- BCRYPT_EFFECTIVE_KEY_LENGTH
- L"EffectiveKeyLength"
The size, in bytes, of the effective length of an RC2 key. This data type is a DWORD.
- BCRYPT_HASH_BLOCK_LENGTH
- L"HashBlockLength"
The size, in bytes, of the block for a hash. This property only applies to hash algorithms. This data type is a DWORD.
- BCRYPT_HASH_LENGTH
- L"HashDigestLength"
The size, in bytes, of the hash value of a hash provider. This data type is a DWORD.
- BCRYPT_HASH_OID_LIST
- L"HashOIDList"
The list of DER-encoded hashing object identifiers (OIDs). This property is a BCRYPT_OID_LIST structure. This property can only be read.
- BCRYPT_INITIALIZATION_VECTOR
- L"IV"
Contains the initialization vector (IV) for a key. This property only applies to keys.
- BCRYPT_KEY_LENGTH
- L"KeyLength"
The size, in bits, of the key value of a symmetric key provider. This data type is a DWORD.
- BCRYPT_KEY_LENGTHS
- L"KeyLengths"
The key lengths that are supported by the algorithm. This property is a BCRYPT_KEY_LENGTHS_STRUCT structure. This property only applies to algorithms.
- BCRYPT_KEY_OBJECT_LENGTH
- L"KeyObjectLength"
This property is not used. The BCRYPT_OBJECT_LENGTH property is used to obtain this information.
- BCRYPT_KEY_STRENGTH
- L"KeyStrength"
The number of bits in the key. This data type is a DWORD. This property only applies to keys.
- BCRYPT_OBJECT_LENGTH
- L"ObjectLength"
The size, in bytes, of the subobject of a provider. This data type is a DWORD. Currently, the hash and symmetric cipher algorithm providers use caller-allocated buffers to store their subobjects. For example, the hash provider requires you to allocate memory for the hash object obtained with the BCryptCreateHash function. This property provides the buffer size for a provider's object so you can allocate memory for the object created by the provider.
- BCRYPT_PADDING_SCHEMES
- L"PaddingSchemes"
Represents the padding scheme of the RSA algorithm provider. This data type is a DWORD. This can be one of the following values.
| Identifier | Value | Description |
|---|
| BCRYPT_SUPPORTED_PAD_ROUTER | 0x00000001 | The provider supports padding added by the router. |
| BCRYPT_SUPPORTED_PAD_PKCS1_ENC | 0x00000002 | The provider supports the PKCS1 encryption padding scheme. |
| BCRYPT_SUPPORTED_PAD_PKCS1_SIG | 0x00000004 | The provider supports the PKCS1 signature padding scheme. |
| BCRYPT_SUPPORTED_PAD_OAEP | 0x00000008 | The provider supports the OAEP padding scheme. |
| BCRYPT_SUPPORTED_PAD_PSS | 0x00000010 | The provider supports the PSS padding scheme. |
- BCRYPT_PROVIDER_HANDLE
- L"ProviderHandle"
The handle of the CNG provider that created the object passed in the hObject parameter. This data type is a BCRYPT_ALG_HANDLE. This property can only be retrieved; it cannot be set.
- BCRYPT_SIGNATURE_LENGTH
- L"SignatureLength"
The size, in bytes, of the length of a signature for a key. This data type is a DWORD. This property only applies to keys. This property can only be retrieved; it cannot be set.
Requirements
| Minimum supported client | Windows Vista |
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| Minimum supported server | Windows Server 2008 |
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| Header | Bcrypt.h |
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Build date: 11/19/2009