133 lines
2.6 KiB
C
133 lines
2.6 KiB
C
/*++
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Copyright (c) 1997-2001 Microsoft Corporation
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Module Name:
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ah.h
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Abstract:
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Contains AH specific structures
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Author:
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Sanjay Anand (SanjayAn) 2-January-1997
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ChunYe
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Environment:
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Kernel mode
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Revision History:
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--*/
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#ifndef _AH_
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#define _AH_
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#define MD5DIGESTLEN 16
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#define SHADIGESTLEN 20
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#define AH_SIZE (sizeof(AH) + MD5DIGESTLEN * sizeof(UCHAR))
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//
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// State buffers for the individual algorithms
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//
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typedef struct _AlgoState {
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union { // internal algo state
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MD5_CTX as_md5ctx;
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A_SHA_CTX as_shactx;
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};
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PSA_TABLE_ENTRY as_sa;
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} ALGO_STATE, *PALGO_STATE;
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typedef NTSTATUS
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(*PALGO_INIT) (
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PALGO_STATE pEntry,
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ULONG Index
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);
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typedef NTSTATUS
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(*PALGO_UPDATE) (
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PALGO_STATE State,
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PUCHAR Data,
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ULONG Length
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);
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typedef NTSTATUS
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(*PALGO_FINISH) (
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PALGO_STATE State,
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PUCHAR Data,
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ULONG Index
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);
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//
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// Array of function ptrs for the AH authentication algorithms
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//
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typedef struct _auth_algorithm {
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PALGO_INIT init; // ptr to init fn for alg.
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PALGO_UPDATE update; // ptr to update fn for alg
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PALGO_FINISH finish; // ptr to finish fn for alg
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ULONG OutputLen; // Length (in u_int8s) of output
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// data. MUST be a multiple of 4
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} AUTH_ALGO, *PAUTH_ALGO;
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#define NUM_AUTH_ALGOS (sizeof(auth_algorithms)/sizeof(AUTH_ALGO)-1)
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//
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// The IPSEC AH payload
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//
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typedef struct _AH {
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UCHAR ah_next;
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UCHAR ah_len;
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USHORT ah_reserved;
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tSPI ah_spi;
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ULONG ah_replay;
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} AH, *PAH;
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NTSTATUS
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IPSecCreateAH(
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IN PUCHAR pIPHeader,
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IN PVOID pData,
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IN PSA_TABLE_ENTRY pSA,
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IN ULONG Index,
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OUT PVOID *ppNewData,
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OUT PVOID *ppSCContext,
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OUT PULONG pExtraBytes,
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IN ULONG HdrSpace,
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IN BOOLEAN fSrcRoute,
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IN BOOLEAN fCryptoOnly
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);
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NTSTATUS
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IPSecVerifyAH(
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IN PUCHAR *pIPHeader,
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IN PVOID pData,
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IN PSA_TABLE_ENTRY pSA,
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IN ULONG Index,
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OUT PULONG pExtraBytes,
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IN BOOLEAN fSrcRoute,
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IN BOOLEAN fCryptoDone,
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IN BOOLEAN fFastRcv
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);
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NTSTATUS
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IPSecGenerateHash(
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IN PUCHAR pIPHeader,
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IN PVOID pData,
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IN PSA_TABLE_ENTRY pSA,
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IN PUCHAR pAHData,
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IN BOOLEAN fMuteDest,
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IN BOOLEAN fIncoming,
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IN PAUTH_ALGO pAlgo,
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IN ULONG Index
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);
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#endif _AH_
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