SecPkgContext_KeyInfoW structure (sspi.h)
The SecPkgContext_KeyInfo structure contains information about the session keys used in a security context. The QueryContextAttributes (General) function uses this structure.
Applications using the Schannel security support provider (SSP) should not use the SecPkgContext_KeyInfo structure. Instead, use the SecPkgContext_ConnectionInfo structure.
Syntax
typedef struct _SecPkgContext_KeyInfoW {
SEC_WCHAR *sSignatureAlgorithmName;
SEC_WCHAR *sEncryptAlgorithmName;
unsigned long KeySize;
unsigned long SignatureAlgorithm;
unsigned long EncryptAlgorithm;
} SecPkgContext_KeyInfoW, *PSecPkgContext_KeyInfoW;
Members
sSignatureAlgorithmName
Pointer to a null-terminated string that contains the name, if available, of the algorithm used for generating signatures, for example "MD5" or "SHA-2".
sEncryptAlgorithmName
Pointer to a null-terminated string that contains the name, if available, of the algorithm used for encrypting messages. Reserved for future use.
KeySize
Specifies the effective key length, in bits, for the session key. This is typically 40, 56, or 128 bits.
SignatureAlgorithm
Specifies the algorithm identifier (ALG_ID) used for generating signatures, if available.
EncryptAlgorithm
Specifies the algorithm identifier (ALG_ID) used for encrypting messages. Reserved for future use.
Remarks
Note
The sspi.h header defines SecPkgContext_KeyInfo as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Header | sspi.h (include Security.h) |