diff options
Diffstat (limited to 'include/linux/mpi.h')
| -rw-r--r-- | include/linux/mpi.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/include/linux/mpi.h b/include/linux/mpi.h index 5d906dfbf3ed..3c9e41603cf6 100644 --- a/include/linux/mpi.h +++ b/include/linux/mpi.h @@ -40,21 +40,79 @@ struct gcry_mpi { typedef struct gcry_mpi *MPI; #define mpi_get_nlimbs(a) ((a)->nlimbs) +#define mpi_has_sign(a) ((a)->sign) /*-- mpiutil.c --*/ MPI mpi_alloc(unsigned nlimbs); +void mpi_clear(MPI a); void mpi_free(MPI a); int mpi_resize(MPI a, unsigned nlimbs); +static inline MPI mpi_new(unsigned int nbits) +{ + return mpi_alloc((nbits + BITS_PER_MPI_LIMB - 1) / BITS_PER_MPI_LIMB); +} + +MPI mpi_copy(MPI a); +MPI mpi_alloc_like(MPI a); +void mpi_snatch(MPI w, MPI u); +MPI mpi_set(MPI w, MPI u); +MPI mpi_set_ui(MPI w, unsigned long u); +MPI mpi_alloc_set_ui(unsigned long u); +void mpi_swap_cond(MPI a, MPI b, unsigned long swap); + +/* Constants used to return constant MPIs. See mpi_init if you + * want to add more constants. + */ +#define MPI_NUMBER_OF_CONSTANTS 6 +enum gcry_mpi_constants { + MPI_C_ZERO, + MPI_C_ONE, + MPI_C_TWO, + MPI_C_THREE, + MPI_C_FOUR, + MPI_C_EIGHT +}; + +MPI mpi_const(enum gcry_mpi_constants no); + /*-- mpicoder.c --*/ + +/* Different formats of external big integer representation. */ +enum gcry_mpi_format { + GCRYMPI_FMT_NONE = 0, + GCRYMPI_FMT_STD = 1, /* Twos complement stored without length. */ + GCRYMPI_FMT_PGP = 2, /* As used by OpenPGP (unsigned only). */ + GCRYMPI_FMT_SSH = 3, /* As used by SSH (like STD but with length). */ + GCRYMPI_FMT_HEX = 4, /* Hex format. */ + GCRYMPI_FMT_USG = 5, /* Like STD but unsigned. */ + GCRYMPI_FMT_OPAQUE = 8 /* Opaque format (some functions only). */ +}; + MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes); MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread); +int mpi_fromstr(MPI val, const char *str); +MPI mpi_scanval(const char *string); MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int len); void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign); int mpi_read_buffer(MPI a, uint8_t *buf, unsigned buf_len, unsigned *nbytes, int *sign); int mpi_write_to_sgl(MPI a, struct scatterlist *sg, unsigned nbytes, int *sign); +int mpi_print(enum gcry_mpi_format format, unsigned char *buffer, + size_t buflen, size_t *nwritten, MPI a); + +/*-- mpi-mod.c --*/ +void mpi_mod(MPI rem, MPI dividend, MPI divisor); + +/* Context used with Barrett reduction. */ +struct barrett_ctx_s; +typedef struct barrett_ctx_s *mpi_barrett_t; + +mpi_barrett_t mpi_barrett_init(MPI m, int copy); +void mpi_barrett_free(mpi_barrett_t ctx); +void mpi_mod_barrett(MPI r, MPI x, mpi_barrett_t ctx); +void mpi_mul_barrett(MPI w, MPI u, MPI v, mpi_barrett_t ctx); /*-- mpi-pow.c --*/ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod); @@ -62,6 +120,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod); /*-- mpi-cmp.c --*/ int mpi_cmp_ui(MPI u, ulong v); int mpi_cmp(MPI u, MPI v); +int mpi_cmpabs(MPI u, MPI v); /*-- mpi-sub-ui.c --*/ int mpi_sub_ui(MPI w, MPI u, unsigned long vval); @@ -69,6 +128,34 @@ int mpi_sub_ui(MPI w, MPI u, unsigned long vval); /*-- mpi-bit.c --*/ void mpi_normalize(MPI a); unsigned mpi_get_nbits(MPI a); +int mpi_test_bit(MPI a, unsigned int n); +void mpi_set_bit(MPI a, unsigned int n); +void mpi_set_highbit(MPI a, unsigned int n); +void mpi_clear_highbit(MPI a, unsigned int n); +void mpi_clear_bit(MPI a, unsigned int n); +void mpi_rshift_limbs(MPI a, unsigned int count); +void mpi_rshift(MPI x, MPI a, unsigned int n); +void mpi_lshift_limbs(MPI a, unsigned int count); +void mpi_lshift(MPI x, MPI a, unsigned int n); + +/*-- mpi-add.c --*/ +void mpi_add_ui(MPI w, MPI u, unsigned long v); +void mpi_add(MPI w, MPI u, MPI v); +void mpi_sub(MPI w, MPI u, MPI v); +void mpi_addm(MPI w, MPI u, MPI v, MPI m); +void mpi_subm(MPI w, MPI u, MPI v, MPI m); + +/*-- mpi-mul.c --*/ +void mpi_mul(MPI w, MPI u, MPI v); +void mpi_mulm(MPI w, MPI u, MPI v, MPI m); + +/*-- mpi-div.c --*/ +void mpi_tdiv_r(MPI rem, MPI num, MPI den); +void mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor); +void mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor); + +/*-- mpi-inv.c --*/ +int mpi_invm(MPI x, MPI a, MPI n); /* inline functions */ |