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Message-ID: <fb2fc1ef-1185-f0a3-d8d0-173d2f97bbaf@virtuozzo.com>
Date: Fri, 1 Jun 2018 19:29:28 +0300
From: Vasily Averin <vvs@...tuozzo.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org
Cc: Dmitry Kasatkin <dmitry.kasatkin@...wei.com>
Subject: [PATCH] lib/mpi: headers cleanup
MPI headers contain definitions for huge number of non-existing functions.
Most part of these functions was removed in 2012 by Dmitry Kasatkin
commit 7cf4206a99d1 ("Remove unused code from MPI library")
commit 9e235dcaf4f6 ("Revert "crypto: GnuPG based MPI lib - additional ...")
commit bc95eeadf5c6 ("lib/mpi: removed unused functions")
however headers was not updated properly.
Also I deleted some unused macros.
cc: Dmitry Kasatkin <dmitry.kasatkin@...wei.com>
Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
---
include/linux/mpi.h | 61 ----------------------------------------
lib/mpi/mpi-internal.h | 75 ++++----------------------------------------------
2 files changed, 5 insertions(+), 131 deletions(-)
diff --git a/include/linux/mpi.h b/include/linux/mpi.h
index 1cc5ffb..7cd1473 100644
--- a/include/linux/mpi.h
+++ b/include/linux/mpi.h
@@ -53,93 +53,32 @@ struct gcry_mpi {
typedef struct gcry_mpi *MPI;
#define mpi_get_nlimbs(a) ((a)->nlimbs)
-#define mpi_is_neg(a) ((a)->sign)
/*-- mpiutil.c --*/
MPI mpi_alloc(unsigned nlimbs);
-MPI mpi_alloc_secure(unsigned nlimbs);
-MPI mpi_alloc_like(MPI a);
void mpi_free(MPI a);
int mpi_resize(MPI a, unsigned nlimbs);
-int mpi_copy(MPI *copy, const MPI a);
-void mpi_clear(MPI a);
-int mpi_set(MPI w, MPI u);
-int mpi_set_ui(MPI w, ulong u);
-MPI mpi_alloc_set_ui(unsigned long u);
-void mpi_m_check(MPI a);
-void mpi_swap(MPI a, MPI b);
/*-- mpicoder.c --*/
-MPI do_encode_md(const void *sha_buffer, unsigned nbits);
MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes);
MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread);
MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int len);
-int mpi_fromstr(MPI val, const char *str);
-u32 mpi_get_keyid(MPI a, u32 *keyid);
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);
-void *mpi_get_secure_buffer(MPI a, unsigned *nbytes, int *sign);
int mpi_write_to_sgl(MPI a, struct scatterlist *sg, unsigned nbytes,
int *sign);
-#define log_mpidump g10_log_mpidump
-
-/*-- mpi-add.c --*/
-int mpi_add_ui(MPI w, MPI u, ulong v);
-int mpi_add(MPI w, MPI u, MPI v);
-int mpi_addm(MPI w, MPI u, MPI v, MPI m);
-int mpi_sub_ui(MPI w, MPI u, ulong v);
-int mpi_sub(MPI w, MPI u, MPI v);
-int mpi_subm(MPI w, MPI u, MPI v, MPI m);
-
-/*-- mpi-mul.c --*/
-int mpi_mul_ui(MPI w, MPI u, ulong v);
-int mpi_mul_2exp(MPI w, MPI u, ulong cnt);
-int mpi_mul(MPI w, MPI u, MPI v);
-int mpi_mulm(MPI w, MPI u, MPI v, MPI m);
-
-/*-- mpi-div.c --*/
-ulong mpi_fdiv_r_ui(MPI rem, MPI dividend, ulong divisor);
-int mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor);
-int mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor);
-int mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor);
-int mpi_tdiv_r(MPI rem, MPI num, MPI den);
-int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den);
-int mpi_tdiv_q_2exp(MPI w, MPI u, unsigned count);
-int mpi_divisible_ui(const MPI dividend, ulong divisor);
-
-/*-- mpi-gcd.c --*/
-int mpi_gcd(MPI g, const MPI a, const MPI b);
-
/*-- mpi-pow.c --*/
-int mpi_pow(MPI w, MPI u, MPI v);
int mpi_powm(MPI res, MPI base, MPI exp, MPI mod);
-/*-- mpi-mpow.c --*/
-int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI mod);
-
/*-- mpi-cmp.c --*/
int mpi_cmp_ui(MPI u, ulong v);
int mpi_cmp(MPI u, MPI v);
-/*-- mpi-scan.c --*/
-int mpi_getbyte(MPI a, unsigned idx);
-void mpi_putbyte(MPI a, unsigned idx, int value);
-unsigned mpi_trailing_zeros(MPI a);
-
/*-- mpi-bit.c --*/
void mpi_normalize(MPI a);
unsigned mpi_get_nbits(MPI a);
-int mpi_test_bit(MPI a, unsigned n);
-int mpi_set_bit(MPI a, unsigned n);
-int mpi_set_highbit(MPI a, unsigned n);
-void mpi_clear_highbit(MPI a, unsigned n);
-void mpi_clear_bit(MPI a, unsigned n);
-int mpi_rshift(MPI x, MPI a, unsigned n);
-
-/*-- mpi-inv.c --*/
-int mpi_invm(MPI x, MPI u, MPI v);
/* inline functions */
diff --git a/lib/mpi/mpi-internal.h b/lib/mpi/mpi-internal.h
index 7eceedd..c2d6f4e 100644
--- a/lib/mpi/mpi-internal.h
+++ b/lib/mpi/mpi-internal.h
@@ -65,13 +65,6 @@
typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
typedef int mpi_size_t; /* (must be a signed type) */
-static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
-{
- if (a->alloced < b)
- return mpi_resize(a, b);
- return 0;
-}
-
/* Copy N limbs from S to D. */
#define MPN_COPY(d, s, n) \
do { \
@@ -80,13 +73,6 @@ static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
(d)[_i] = (s)[_i]; \
} while (0)
-#define MPN_COPY_INCR(d, s, n) \
- do { \
- mpi_size_t _i; \
- for (_i = 0; _i < (n); _i++) \
- (d)[_i] = (s)[_i]; \
- } while (0)
-
#define MPN_COPY_DECR(d, s, n) \
do { \
mpi_size_t _i; \
@@ -111,15 +97,6 @@ static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
} \
} while (0)
-#define MPN_NORMALIZE_NOT_ZERO(d, n) \
- do { \
- for (;;) { \
- if ((d)[(n)-1]) \
- break; \
- (n)--; \
- } \
- } while (0)
-
#define MPN_MUL_N_RECURSE(prodp, up, vp, size, tspace) \
do { \
if ((size) < KARATSUBA_THRESHOLD) \
@@ -128,46 +105,11 @@ static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
mul_n(prodp, up, vp, size, tspace); \
} while (0);
-/* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
- * limb not larger than (2**(2*BITS_PER_MP_LIMB))/D - (2**BITS_PER_MP_LIMB).
- * If this would yield overflow, DI should be the largest possible number
- * (i.e., only ones). For correct operation, the most significant bit of D
- * has to be set. Put the quotient in Q and the remainder in R.
- */
-#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
- do { \
- mpi_limb_t _q, _ql, _r; \
- mpi_limb_t _xh, _xl; \
- umul_ppmm(_q, _ql, (nh), (di)); \
- _q += (nh); /* DI is 2**BITS_PER_MPI_LIMB too small */ \
- umul_ppmm(_xh, _xl, _q, (d)); \
- sub_ddmmss(_xh, _r, (nh), (nl), _xh, _xl); \
- if (_xh) { \
- sub_ddmmss(_xh, _r, _xh, _r, 0, (d)); \
- _q++; \
- if (_xh) { \
- sub_ddmmss(_xh, _r, _xh, _r, 0, (d)); \
- _q++; \
- } \
- } \
- if (_r >= (d)) { \
- _r -= (d); \
- _q++; \
- } \
- (r) = _r; \
- (q) = _q; \
- } while (0)
-
/*-- mpiutil.c --*/
mpi_ptr_t mpi_alloc_limb_space(unsigned nlimbs);
void mpi_free_limb_space(mpi_ptr_t a);
void mpi_assign_limb_space(MPI a, mpi_ptr_t ap, unsigned nlimbs);
-/*-- mpi-bit.c --*/
-void mpi_rshift_limbs(MPI a, unsigned int count);
-int mpi_lshift_limbs(MPI a, unsigned int count);
-
-/*-- mpihelp-add.c --*/
static inline mpi_limb_t mpihelp_add_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
mpi_size_t s1_size, mpi_limb_t s2_limb);
mpi_limb_t mpihelp_add_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
@@ -175,7 +117,6 @@ mpi_limb_t mpihelp_add_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
static inline mpi_limb_t mpihelp_add(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
mpi_ptr_t s2_ptr, mpi_size_t s2_size);
-/*-- mpihelp-sub.c --*/
static inline mpi_limb_t mpihelp_sub_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
mpi_size_t s1_size, mpi_limb_t s2_limb);
mpi_limb_t mpihelp_sub_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
@@ -183,10 +124,10 @@ mpi_limb_t mpihelp_sub_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
static inline mpi_limb_t mpihelp_sub(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
mpi_ptr_t s2_ptr, mpi_size_t s2_size);
-/*-- mpihelp-cmp.c --*/
+/*-- mpih-cmp.c --*/
int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size);
-/*-- mpihelp-mul.c --*/
+/*-- mpih-mul.c --*/
struct karatsuba_ctx {
struct karatsuba_ctx *next;
@@ -202,7 +143,6 @@ mpi_limb_t mpihelp_addmul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
mpi_size_t s1_size, mpi_limb_t s2_limb);
mpi_limb_t mpihelp_submul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
mpi_size_t s1_size, mpi_limb_t s2_limb);
-int mpihelp_mul_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size);
int mpihelp_mul(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t usize,
mpi_ptr_t vp, mpi_size_t vsize, mpi_limb_t *_result);
void mpih_sqr_n_basecase(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size);
@@ -214,21 +154,16 @@ int mpihelp_mul_karatsuba_case(mpi_ptr_t prodp,
mpi_ptr_t vp, mpi_size_t vsize,
struct karatsuba_ctx *ctx);
-/*-- mpihelp-mul_1.c (or xxx/cpu/ *.S) --*/
+/*-- generic_mpih-mul1.c --*/
mpi_limb_t mpihelp_mul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
mpi_size_t s1_size, mpi_limb_t s2_limb);
-/*-- mpihelp-div.c --*/
-mpi_limb_t mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
- mpi_limb_t divisor_limb);
+/*-- mpih-div.c --*/
mpi_limb_t mpihelp_divrem(mpi_ptr_t qp, mpi_size_t qextra_limbs,
mpi_ptr_t np, mpi_size_t nsize,
mpi_ptr_t dp, mpi_size_t dsize);
-mpi_limb_t mpihelp_divmod_1(mpi_ptr_t quot_ptr,
- mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
- mpi_limb_t divisor_limb);
-/*-- mpihelp-shift.c --*/
+/*-- generic_mpih-[lr]shift.c --*/
mpi_limb_t mpihelp_lshift(mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
unsigned cnt);
mpi_limb_t mpihelp_rshift(mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
--
2.7.4
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