235 lines
8.7 KiB
C
235 lines
8.7 KiB
C
// This file was extracted from the TCG Published
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// Trusted Platform Module Library
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// Part 4: Supporting Routines
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// Family "2.0"
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// Level 00 Revision 01.16
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// October 30, 2014
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#ifndef _CRYPT_PRI_H
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#define _CRYPT_PRI_H
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#include <stddef.h>
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#include "TpmBuildSwitches.h"
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#include "BaseTypes.h"
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#include "TpmError.h"
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#include "swap.h"
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#include "Implementation.h"
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#include "TPM_Types.h"
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//#include "TPMB.h"
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#include "bool.h"
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#include "Platform.h"
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#ifndef NULL
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#define NULL 0
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#endif
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typedef UINT16 NUMBYTES; // When a size is a number of bytes
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typedef UINT32 NUMDIGITS; // When a size is a number of "digits"
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// General Purpose Macros
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//
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#ifndef MAX
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# define MAX(a, b) ((a) > (b) ? (a) : b)
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#endif
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//
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// This is the definition of a bit array with one bit per algorithm
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//
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typedef BYTE ALGORITHM_VECTOR[(ALG_LAST_VALUE + 7) / 8];
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//
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//
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// Self-test
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//
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// This structure is used to contain self-test tracking information for the crypto engine. Each of the major
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// modules is given a 32-bit value in which it may maintain its own self test information. The convention for
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// this state is that when all of the bits in this structure are 0, all functions need to be tested.
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//
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typedef struct {
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UINT32 rng;
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UINT32 hash;
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UINT32 sym;
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#ifdef TPM_ALG_RSA
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UINT32 rsa;
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#endif
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#ifdef TPM_ALG_ECC
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UINT32 ecc;
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#endif
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} CRYPTO_SELF_TEST_STATE;
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//
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//
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// Hash-related Structures
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//
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typedef struct {
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const TPM_ALG_ID alg;
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const NUMBYTES digestSize;
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const NUMBYTES blockSize;
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const NUMBYTES derSize;
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const BYTE der[20];
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} HASH_INFO;
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//
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// This value will change with each implementation. The value of 16 is used to account for any slop in the
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// context values. The overall size needs to be as large as any of the hash contexts. The structure needs to
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// start on an alignment boundary and be an even multiple of the alignment
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//
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#define ALIGNED_SIZE(x, b) ((((x) + (b) - 1) / (b)) * (b))
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#define MAX_HASH_STATE_SIZE ((2 * MAX_HASH_BLOCK_SIZE) + 16)
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#if defined USER_MIN_HASH_STATE_SIZE && \
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(MAX_HASH_STATE_SIZE < (USER_MIN_HASH_STATE_SIZE))
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#define REQUIRED_HASH_STATE_SIZE USER_MIN_HASH_STATE_SIZE
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#else
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#define REQUIRED_HASH_STATE_SIZE MAX_HASH_STATE_SIZE
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#endif
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#define MAX_HASH_STATE_SIZE_ALIGNED \
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ALIGNED_SIZE(REQUIRED_HASH_STATE_SIZE, CRYPTO_ALIGNMENT)
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//
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// This is an byte array that will hold any of the hash contexts.
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//
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typedef CRYPTO_ALIGNED BYTE ALIGNED_HASH_STATE[MAX_HASH_STATE_SIZE_ALIGNED];
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//
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// Macro to align an address to the next higher size
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//
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#define AlignPointer(address, align) \
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((((intptr_t)&(address)) + (align - 1)) & ~(align - 1))
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//
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// Macro to test alignment
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//
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#define IsAddressAligned(address, align) \
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(((intptr_t)(address) & (align - 1)) == 0)
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//
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// This is the structure that is used for passing a context into the hashing functions. It should be the same
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// size as the function context used within the hashing functions. This is checked when the hash function is
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// initialized. This version uses a new layout for the contexts and a different definition. The state buffer is an
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// array of HASH_UNIT values so that a decent compiler will put the structure on a HASH_UNIT boundary.
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// If the structure is not properly aligned, the code that manipulates the structure will copy to a properly
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// aligned structure before it is used and copy the result back. This just makes things slower.
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//
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typedef struct _HASH_STATE
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{
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ALIGNED_HASH_STATE state;
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TPM_ALG_ID hashAlg;
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} CPRI_HASH_STATE, *PCPRI_HASH_STATE;
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extern const HASH_INFO g_hashData[HASH_COUNT + 1];
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//
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// This is for the external hash state. This implementation assumes that the size of the exported hash state
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// is no larger than the internal hash state. There is a compile-time check to make sure that this is true.
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//
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typedef struct {
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ALIGNED_HASH_STATE buffer;
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TPM_ALG_ID hashAlg;
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} EXPORT_HASH_STATE;
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typedef enum {
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IMPORT_STATE, // Converts externally formatted state to internal
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EXPORT_STATE // Converts internal formatted state to external
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} IMPORT_EXPORT;
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//
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// Values and structures for the random number generator. These values are defined in this header file so
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// that the size of the RNG state can be known to TPM.lib. This allows the allocation of some space in NV
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// memory for the state to be stored on an orderly shutdown. The GET_PUT enum is used by
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// _cpri__DrbgGetPutState() to indicate the direction of data flow.
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//
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typedef enum {
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GET_STATE, // Get the state to save to NV
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PUT_STATE // Restore the state from NV
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} GET_PUT;
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//
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// The DRBG based on a symmetric block cipher is defined by three values,
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// a) the key size
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// b) the block size (the IV size)
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// c) the symmetric algorithm
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//
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#define DRBG_KEY_SIZE_BITS MAX_AES_KEY_BITS
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#define DRBG_IV_SIZE_BITS (MAX_AES_BLOCK_SIZE_BYTES * 8)
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#define DRBG_ALGORITHM TPM_ALG_AES
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#if ((DRBG_KEY_SIZE_BITS % 8) != 0) || ((DRBG_IV_SIZE_BITS % 8) != 0)
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#error "Key size and IV for DRBG must be even multiples of 8"
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#endif
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#if (DRBG_KEY_SIZE_BITS % DRBG_IV_SIZE_BITS) != 0
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#error "Key size for DRBG must be even multiple of the cypher block size"
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#endif
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typedef UINT32 DRBG_SEED[(DRBG_KEY_SIZE_BITS + DRBG_IV_SIZE_BITS) / 32];
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typedef struct {
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UINT64 reseedCounter;
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UINT32 magic;
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DRBG_SEED seed; // contains the key and IV for the counter mode DRBG
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UINT32 lastValue[4]; // used when the TPM does continuous self-test
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// for FIPS compliance of DRBG
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} DRBG_STATE, *pDRBG_STATE;
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//
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//
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// Asymmetric Structures and Values
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//
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#ifdef TPM_ALG_ECC
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//
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//
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// ECC-related Structures
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//
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// This structure replicates the structure definition in TPM_Types.h. It is duplicated to avoid inclusion of all of
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// TPM_Types.h This structure is similar to the RSA_KEY structure below. The purpose of these structures
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// is to reduce the overhead of a function call and to make the code less dependent on key types as much
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// as possible.
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//
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typedef struct {
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UINT32 curveID; // The curve identifier
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TPMS_ECC_POINT *publicPoint; // Pointer to the public point
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TPM2B_ECC_PARAMETER *privateKey; // Pointer to the private key
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} ECC_KEY;
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#endif // TPM_ALG_ECC
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#ifdef TPM_ALG_RSA
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//
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//
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// RSA-related Structures
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//
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// This structure is a succinct representation of the cryptographic components of an RSA key.
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//
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typedef struct {
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UINT32 exponent; // The public exponent pointer
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TPM2B *publicKey; // Pointer to the public modulus
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TPM2B *privateKey; // The private exponent (not a prime)
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} RSA_KEY;
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#endif // TPM_ALG_RSA
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//
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//
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// Miscelaneous
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//
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#ifdef TPM_ALG_RSA
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# ifdef TPM_ALG_ECC
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# if MAX_RSA_KEY_BYTES > MAX_ECC_KEY_BYTES
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# define MAX_NUMBER_SIZE MAX_RSA_KEY_BYTES
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# else
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# define MAX_NUMBER_SIZE MAX_ECC_KEY_BYTES
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# endif
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# else // RSA but no ECC
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# define MAX_NUMBER_SIZE MAX_RSA_KEY_BYTES
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# endif
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#elif defined TPM_ALG_ECC
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# define MAX_NUMBER_SIZE MAX_ECC_KEY_BYTES
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#else
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# error No assymmetric algorithm implemented.
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#endif
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typedef INT16 CRYPT_RESULT;
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#define CRYPT_RESULT_MIN INT16_MIN
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#define CRYPT_RESULT_MAX INT16_MAX
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//
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//
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// <0 recoverable error
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//
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// 0 success
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// >0 command specific return value (generally a digest size)
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//
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#define CRYPT_FAIL ((CRYPT_RESULT) 1)
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#define CRYPT_SUCCESS ((CRYPT_RESULT) 0)
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#define CRYPT_NO_RESULT ((CRYPT_RESULT) -1)
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//
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#define CRYPT_SCHEME ((CRYPT_RESULT) -2)
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#define CRYPT_PARAMETER ((CRYPT_RESULT) -3)
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#define CRYPT_UNDERFLOW ((CRYPT_RESULT) -4)
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#define CRYPT_POINT ((CRYPT_RESULT) -5)
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#define CRYPT_CANCEL ((CRYPT_RESULT) -6)
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#include "CpriCryptPri_fp.h"
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#ifdef TPM_ALG_ECC
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# include "CpriDataEcc.h"
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# include "CpriECC_fp.h"
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#endif
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#include "MathFunctions_fp.h"
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#include "CpriRNG_fp.h"
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#include "CpriHash_fp.h"
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#include "CpriSym_fp.h"
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#ifdef TPM_ALG_RSA
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# include "CpriRSA_fp.h"
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#endif
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#endif // !_CRYPT_PRI_H
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