These low-level Win32® cryptographic functions were formerly in Microsoft® CryptoAPI version 1.0, and provide you the most flexibility in applying cryptography to your applications. These functions facilitate communication with the cryptographic service providers (CSP).
The following functions are included in this category and can also be found in Wincrypt.h.
| Function | Description |
|---|---|
| CryptAcquireContext | Acquires a handle to a particular key container within a particular CSP. |
| CryptContextAddRef | Adds one to the reference count on a HCRYPTPROV handle. |
| CryptCreateHash | Initiates the hashing of a stream of data. |
| CryptDecrypt | Decrypts data that was previously encrypted via the CryptEncrypt function. |
| CryptDeriveKey | Generates cryptographic keys derived from base data. |
| CryptDestroyHash | Destroys the hash object referenced by the hHash parameter. |
| CryptDestroyKey | Releases the handle referenced by the hKey parameter. After a key handle has been released, it becomes invalid and cannot be used again. |
| CryptDuplicateHash | Makes an exact copy of a hash and the state the hash is in. |
| CryptDuplicateKey | Makes an exact copy of a key and the state the key is in. |
| CryptEncrypt | Encrypts data. |
| CryptEnumProviders | Enumerates the providers on a computer. |
| CryptEnumProviderTypes | Enumerates the types of providers supported on the computer. |
| CryptExportKey | Exports cryptographic keys out of a cryptographic service provider in a secure manner. |
| CryptFormatObject | Formats the encoded data and returns a Unicode string in the allocated buffer according to the certificate encoding type. |
| CryptGenKey | Generates random cryptographic keys for use with the CSP module. |
| CryptGenRandom | Fills a buffer with random bytes. |
| CryptGetDefaultProvider | Determines the default CSP either for the current user or the computer for a given provider type. |
| CryptGetHashParam | Retrieves data that governs the operations of a hash object. |
| CryptGetKeyParam | Retrieves data that governs the operations of a key. |
| CryptGetProvParam | Retrieves parameters that govern the operations of a CSP. |
| CryptGetUserKey | Retrieves a handle to a permanent user key pair, such as the user's signature key pair. |
| CryptHashData | Computes the cryptographic hash on a stream of data. |
| CryptHashSessionKey | Computes the cryptographic hash on a key object. |
| CryptImportKey | Transfers a cryptographic key from a key blob to a CSP. |
| CryptProtectData | Performs encryption on the data in a DATA_BLOB. |
| CryptQueryObject | Takes a CERT_BLOB or a file name and returns the information about the content of the blob or the file. |
| CryptReleaseContext | Releases a handle to a CSP and a key container. |
| CryptSetHashParam | In theory, this function customizes the operations of a hash object. Currently, only a single parameter is defined for this function. |
| CryptSetKeyParam | Customizes various aspects of a key's operations. |
| CryptSetProvider | Specifies the current user default CSP. |
| CryptSetProviderEx | Specifies either the current user default CSP or the computer default CSP. |
| CryptSetProvParam | Customizes the operations of a CSP. |
| CryptSignHash | Signs a piece of data. |
| CryptUnprotectData | Performs a decryption and integrity check of the data in a DATA_BLOB. |
| CryptVerifySignature | Verifies a signature against a hash object. |