/home/dko/Projects/mobilec/src/security/xyssl-0.9/library/bignum.c File Reference

#include "xyssl/config.h"
#include "xyssl/bignum.h"
#include "xyssl/bn_mul.h"
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>

Go to the source code of this file.

Defines

#define ciL   ((int) sizeof(t_int))
#define biL   (ciL << 3)
#define biH   (ciL << 2)
#define BITS_TO_LIMBS(i)   (((i) + biL - 1) / biL)
#define CHARS_TO_LIMBS(i)   (((i) + ciL - 1) / ciL)

Functions

void mpi_init (mpi *X,...)
 Initialize one or more mpi.
void mpi_free (mpi *X,...)
 Unallocate one or more mpi.
int mpi_grow (mpi *X, int nblimbs)
 Enlarge to the specified number of limbs.
int mpi_copy (mpi *X, mpi *Y)
 Copy the contents of Y into X.
void mpi_swap (mpi *X, mpi *Y)
 Swap the contents of X and Y.
int mpi_lset (mpi *X, int z)
 Set value from integer.
int mpi_lsb (mpi *X)
 Return the number of least significant bits.
int mpi_msb (mpi *X)
 Return the number of most significant bits.
int mpi_size (mpi *X)
 Return the total size in bytes.
static int mpi_get_digit (t_int *d, int radix, char c)
int mpi_read_string (mpi *X, int radix, char *s)
 Import from an ASCII string.
static int mpi_write_hlp (mpi *X, int radix, char **p)
int mpi_write_string (mpi *X, int radix, char *s, int *slen)
 Export into an ASCII string.
int mpi_read_file (mpi *X, int radix, FILE *fin)
 Read X from an opened file.
int mpi_read_mystring (mpi *X, int radix, char *s)
int mpi_write_file (char *p, mpi *X, int radix, FILE *fout)
 Write X into an opened file, or stdout.
int mpi_read_binary (mpi *X, unsigned char *buf, int buflen)
 Import X from unsigned binary data, big endian.
int mpi_write_binary (mpi *X, unsigned char *buf, int buflen)
 Export X into unsigned binary data, big endian.
int mpi_shift_l (mpi *X, int count)
 Left-shift: X <<= count.
int mpi_shift_r (mpi *X, int count)
 Right-shift: X >>= count.
int mpi_cmp_abs (mpi *X, mpi *Y)
 Compare unsigned values.
int mpi_cmp_mpi (mpi *X, mpi *Y)
 Compare signed values.
int mpi_cmp_int (mpi *X, int z)
 Compare signed values.
int mpi_add_abs (mpi *X, mpi *A, mpi *B)
 Unsigned addition: X = |A| + |B|.
static void mpi_sub_hlp (int n, t_int *s, t_int *d)
int mpi_sub_abs (mpi *X, mpi *A, mpi *B)
 Unsigned substraction: X = |A| - |B|.
int mpi_add_mpi (mpi *X, mpi *A, mpi *B)
 Signed addition: X = A + B.
int mpi_sub_mpi (mpi *X, mpi *A, mpi *B)
 Signed substraction: X = A - B.
int mpi_add_int (mpi *X, mpi *A, int b)
 Signed addition: X = A + b.
int mpi_sub_int (mpi *X, mpi *A, int b)
 Signed substraction: X = A - b.
static void mpi_mul_hlp (int i, t_int *s, t_int *d, t_int b)
int mpi_mul_mpi (mpi *X, mpi *A, mpi *B)
 Baseline multiplication: X = A * B.
int mpi_mul_int (mpi *X, mpi *A, t_int b)
 Baseline multiplication: X = A * b.
int mpi_div_mpi (mpi *Q, mpi *R, mpi *A, mpi *B)
 Division by mpi: A = Q * B + R.
int mpi_div_int (mpi *Q, mpi *R, mpi *A, int b)
 Division by int: A = Q * b + R.
int mpi_mod_mpi (mpi *R, mpi *A, mpi *B)
 Modulo: R = A mod B.
int mpi_mod_int (t_int *r, mpi *A, int b)
 Modulo: r = A mod b.
static void mpi_montg_init (t_int *mm, mpi *N)
static void mpi_montmul (mpi *A, mpi *B, mpi *N, t_int mm, mpi *T)
static void mpi_montred (mpi *A, mpi *N, t_int mm, mpi *T)
int mpi_exp_mod (mpi *X, mpi *A, mpi *E, mpi *N, mpi *_RR)
 Sliding-window exponentiation: X = A^E mod N.
int mpi_gcd (mpi *G, mpi *A, mpi *B)
 Greatest common divisor: G = gcd(A, B).
int mpi_inv_mod (mpi *X, mpi *A, mpi *N)
 Modular inverse: X = A^-1 mod N.
int mpi_is_prime (mpi *X, int(*f_rng)(void *), void *p_rng)
 Miller-Rabin primality test.
int mpi_gen_prime (mpi *X, int nbits, int dh_flag, int(*f_rng)(void *), void *p_rng)
 Prime number generation.
int mpi_self_test (int verbose)
 Checkup routine.

Variables

static const int small_prime []

Define Documentation

#define biH   (ciL << 2)

Definition at line 41 of file bignum.c.

Referenced by mpi_div_mpi(), and mpi_mod_int().

#define biL   (ciL << 3)

Definition at line 40 of file bignum.c.

Referenced by mpi_div_mpi(), mpi_exp_mod(), mpi_lsb(), mpi_montg_init(), mpi_msb(), mpi_shift_l(), and mpi_shift_r().

#define BITS_TO_LIMBS ( i   )     (((i) + biL - 1) / biL)

Definition at line 46 of file bignum.c.

Referenced by mpi_gen_prime(), mpi_read_string(), and mpi_shift_l().

#define CHARS_TO_LIMBS ( i   )     (((i) + ciL - 1) / ciL)

Definition at line 47 of file bignum.c.

Referenced by mpi_read_binary().

#define ciL   ((int) sizeof(t_int))

Definition at line 39 of file bignum.c.

Referenced by mpi_copy(), mpi_free(), mpi_gen_prime(), mpi_grow(), mpi_is_prime(), mpi_lset(), mpi_montmul(), mpi_read_binary(), mpi_read_string(), mpi_write_binary(), and mpi_write_string().

Function Documentation

int mpi_add_abs ( mpi *  X,
mpi *  A,
mpi *  B 
)

Unsigned addition: X = |A| + |B|.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 694 of file bignum.c.

References MPI_CHK, mpi_copy(), mpi_grow(), mpi::n, and mpi::p.

Referenced by mpi_add_mpi(), and mpi_sub_mpi().

int mpi_add_int ( mpi *  X,
mpi *  A,
int  b 
)

Signed addition: X = A + b.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 860 of file bignum.c.

References mpi_add_mpi(), mpi::n, mpi::p, and mpi::s.

Referenced by mpi_gen_prime(), and mpi_read_string().

int mpi_add_mpi ( mpi *  X,
mpi *  A,
mpi *  B 
)

Signed addition: X = A + B.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 798 of file bignum.c.

References mpi_add_abs(), MPI_CHK, mpi_cmp_abs(), mpi_sub_abs(), and mpi::s.

Referenced by mpi_add_int(), mpi_div_mpi(), mpi_inv_mod(), mpi_mod_mpi(), and rsa_private().

int mpi_cmp_abs ( mpi *  X,
mpi *  Y 
)

Compare unsigned values.

Returns:
1 if |X| is greater than |Y|, -1 if |X| is lesser than |Y| or 0 if |X| is equal to |Y|

Definition at line 615 of file bignum.c.

References mpi::n, and mpi::p.

Referenced by mpi_add_mpi(), mpi_div_mpi(), mpi_montmul(), mpi_sub_abs(), and mpi_sub_mpi().

int mpi_cmp_int ( mpi *  X,
int  z 
)

Compare signed values.

Returns:
1 if X is greater than z, -1 if X is lesser than z or 0 if X is equal to z

Definition at line 678 of file bignum.c.

References mpi_cmp_mpi(), mpi::n, mpi::p, and mpi::s.

Referenced by mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_inv_mod(), mpi_is_prime(), mpi_mod_mpi(), mpi_write_hlp(), rsa_check_privkey(), and rsa_gen_key().

int mpi_cmp_mpi ( mpi *  X,
mpi *  Y 
)

Compare signed values.

Returns:
1 if X is greater than Y, -1 if X is lesser than Y or 0 if X is equal to Y

Definition at line 645 of file bignum.c.

References mpi::n, mpi::p, and mpi::s.

Referenced by dhm_make_params(), dhm_make_public(), mpi_cmp_int(), mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_inv_mod(), mpi_is_prime(), mpi_mod_mpi(), mpi_self_test(), rsa_check_privkey(), rsa_gen_key(), rsa_private(), and rsa_public().

int mpi_copy ( mpi *  X,
mpi *  Y 
)

Copy the contents of Y into X.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 128 of file bignum.c.

References ciL, MPI_CHK, mpi_grow(), mpi::n, mpi::p, and mpi::s.

Referenced by mpi_add_abs(), mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_inv_mod(), mpi_is_prime(), mpi_mul_mpi(), mpi_sub_abs(), and mpi_write_string().

int mpi_div_int ( mpi *  Q,
mpi *  R,
mpi *  A,
int  b 
)

Division by int: A = Q * b + R.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_DIVISION_BY_ZERO if b == 0
Note:
Either Q or R can be NULL.

Definition at line 1173 of file bignum.c.

References mpi_div_mpi(), mpi::n, mpi::p, and mpi::s.

Referenced by main(), and mpi_write_hlp().

int mpi_div_mpi ( mpi *  Q,
mpi *  R,
mpi *  A,
mpi *  B 
)

Division by mpi: A = Q * B + R.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_DIVISION_BY_ZERO if B == 0
Note:
Either Q or R can be NULL.

Definition at line 1008 of file bignum.c.

References biH, biL, mpi_add_mpi(), MPI_CHK, mpi_cmp_abs(), mpi_cmp_int(), mpi_cmp_mpi(), mpi_copy(), mpi_free(), mpi_grow(), mpi_init(), mpi_lset(), mpi_msb(), mpi_mul_int(), mpi_shift_l(), mpi_shift_r(), mpi_sub_mpi(), mpi::n, mpi::p, mpi::s, and XYSSL_ERR_MPI_DIVISION_BY_ZERO.

Referenced by mpi_div_int(), mpi_mod_mpi(), and mpi_self_test().

int mpi_exp_mod ( mpi *  X,
mpi *  A,
mpi *  E,
mpi *  N,
mpi *  _RR 
)

Sliding-window exponentiation: X = A^E mod N.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_BAD_INPUT_DATA if N is negative or even
Note:
_RR is used to avoid re-computing R*R mod N across multiple calls, which speeds up things a bit. It can be set to NULL if the extra performance is unneeded.

Definition at line 1328 of file bignum.c.

References biL, MPI_CHK, mpi_cmp_int(), mpi_cmp_mpi(), mpi_copy(), mpi_free(), mpi_grow(), mpi_init(), mpi_lset(), mpi_mod_mpi(), mpi_montg_init(), mpi_montmul(), mpi_montred(), mpi_msb(), mpi_shift_l(), mpi::n, mpi::p, and XYSSL_ERR_MPI_BAD_INPUT_DATA.

Referenced by dhm_calc_secret(), dhm_make_params(), dhm_make_public(), main(), mpi_is_prime(), mpi_self_test(), rsa_private(), and rsa_public().

void mpi_free ( mpi *  X,
  ... 
)

Unallocate one or more mpi.

Definition at line 73 of file bignum.c.

References ciL, mpi::n, mpi::p, and mpi::s.

Referenced by dhm_free(), main(), mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_gen_prime(), mpi_inv_mod(), mpi_is_prime(), mpi_mul_mpi(), mpi_read_string(), mpi_self_test(), mpi_sub_abs(), mpi_write_string(), rsa_check_privkey(), rsa_free(), rsa_gen_key(), rsa_private(), and rsa_public().

int mpi_gcd ( mpi *  G,
mpi *  A,
mpi *  B 
)

Greatest common divisor: G = gcd(A, B).

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 1507 of file bignum.c.

References MPI_CHK, mpi_cmp_int(), mpi_cmp_mpi(), mpi_copy(), mpi_free(), mpi_init(), mpi_lset(), mpi_mul_mpi(), mpi_shift_r(), mpi_sub_abs(), mpi::p, and mpi::s.

Referenced by mpi_inv_mod(), rsa_check_privkey(), and rsa_gen_key().

int mpi_gen_prime ( mpi *  X,
int  nbits,
int  dh_flag,
int(*)(void *)  f_rng,
void *  p_rng 
)

Prime number generation.

Parameters:
X destination mpi
nbits required size of X in bits
dh_flag if 1, then (X-1)/2 will be prime too
f_rng RNG function
p_rng RNG parameter
Returns:
0 if successful (probably prime), 1 if memory allocation failed, XYSSL_ERR_MPI_BAD_INPUT_DATA if nbits is < 3

Definition at line 1778 of file bignum.c.

References BITS_TO_LIMBS, ciL, mpi_add_int(), MPI_CHK, mpi_free(), mpi_grow(), mpi_init(), mpi_is_prime(), mpi_lset(), mpi_msb(), mpi_shift_l(), mpi_shift_r(), mpi_sub_int(), mpi::p, XYSSL_ERR_MPI_BAD_INPUT_DATA, and XYSSL_ERR_MPI_NOT_ACCEPTABLE.

Referenced by main(), and rsa_gen_key().

static int mpi_get_digit ( t_int *  d,
int  radix,
char  c 
) [static]

Definition at line 226 of file bignum.c.

References XYSSL_ERR_MPI_INVALID_CHARACTER.

Referenced by mpi_read_file(), mpi_read_mystring(), and mpi_read_string().

int mpi_grow ( mpi *  X,
int  nblimbs 
)

Enlarge to the specified number of limbs.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 100 of file bignum.c.

References ciL, mpi::n, and mpi::p.

Referenced by dhm_make_params(), dhm_make_public(), mpi_add_abs(), mpi_copy(), mpi_div_mpi(), mpi_exp_mod(), mpi_gen_prime(), mpi_is_prime(), mpi_lset(), mpi_mul_mpi(), mpi_read_binary(), mpi_read_string(), and mpi_shift_l().

void mpi_init ( mpi *  X,
  ... 
)

Initialize one or more mpi.

Definition at line 52 of file bignum.c.

References mpi::n, mpi::p, and mpi::s.

Referenced by main(), mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_gen_prime(), mpi_inv_mod(), mpi_is_prime(), mpi_mul_mpi(), mpi_read_string(), mpi_self_test(), mpi_sub_abs(), mpi_write_string(), rsa_check_privkey(), rsa_gen_key(), rsa_private(), and rsa_public().

int mpi_inv_mod ( mpi *  X,
mpi *  A,
mpi *  N 
)

Modular inverse: X = A^-1 mod N.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_BAD_INPUT_DATA if N is negative or nil XYSSL_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N

Definition at line 1549 of file bignum.c.

References mpi_add_mpi(), MPI_CHK, mpi_cmp_int(), mpi_cmp_mpi(), mpi_copy(), mpi_free(), mpi_gcd(), mpi_init(), mpi_lset(), mpi_mod_mpi(), mpi_shift_r(), mpi_sub_mpi(), mpi::p, XYSSL_ERR_MPI_BAD_INPUT_DATA, and XYSSL_ERR_MPI_NOT_ACCEPTABLE.

Referenced by main(), mpi_self_test(), and rsa_gen_key().

int mpi_is_prime ( mpi *  X,
int(*)(void *)  f_rng,
void *  p_rng 
)

Miller-Rabin primality test.

Returns:
0 if successful (probably prime), 1 if memory allocation failed, XYSSL_ERR_MPI_NOT_ACCEPTABLE if X is not prime

Definition at line 1667 of file bignum.c.

References ciL, MPI_CHK, mpi_cmp_int(), mpi_cmp_mpi(), mpi_copy(), mpi_exp_mod(), mpi_free(), mpi_grow(), mpi_init(), mpi_lsb(), mpi_mod_int(), mpi_mod_mpi(), mpi_msb(), mpi_mul_mpi(), mpi_shift_r(), mpi_sub_int(), mpi::n, mpi::p, R, mpi::s, small_prime, and XYSSL_ERR_MPI_NOT_ACCEPTABLE.

Referenced by main(), and mpi_gen_prime().

int mpi_lsb ( mpi *  X  ) 

Return the number of least significant bits.

Definition at line 185 of file bignum.c.

References biL, int, mpi::n, and mpi::p.

Referenced by mpi_is_prime().

int mpi_lset ( mpi *  X,
int  z 
)

Set value from integer.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 167 of file bignum.c.

References ciL, MPI_CHK, mpi_grow(), mpi::n, mpi::p, and mpi::s.

Referenced by dhm_make_params(), dhm_make_public(), mpi_div_mpi(), mpi_exp_mod(), mpi_gcd(), mpi_gen_prime(), mpi_inv_mod(), mpi_mul_mpi(), mpi_read_binary(), mpi_read_string(), and rsa_gen_key().

int mpi_mod_int ( t_int *  r,
mpi *  A,
int  b 
)

Modulo: r = A mod b.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_DIVISION_BY_ZERO if b == 0

Definition at line 1209 of file bignum.c.

References biH, mpi::n, mpi::p, and XYSSL_ERR_MPI_DIVISION_BY_ZERO.

Referenced by mpi_is_prime(), and mpi_write_hlp().

int mpi_mod_mpi ( mpi *  R,
mpi *  A,
mpi *  B 
)

Modulo: R = A mod B.

Returns:
0 if successful, 1 if memory allocation failed, XYSSL_ERR_MPI_DIVISION_BY_ZERO if B == 0

Definition at line 1189 of file bignum.c.

References mpi_add_mpi(), MPI_CHK, mpi_cmp_int(), mpi_cmp_mpi(), mpi_div_mpi(), and mpi_sub_mpi().

Referenced by mpi_exp_mod(), mpi_inv_mod(), mpi_is_prime(), rsa_check_privkey(), rsa_gen_key(), and rsa_private().

static void mpi_montg_init ( t_int *  mm,
mpi *  N 
) [static]

Definition at line 1259 of file bignum.c.

References biL, and mpi::p.

Referenced by mpi_exp_mod().

static void mpi_montmul ( mpi *  A,
mpi *  B,
mpi *  N,
t_int  mm,
mpi *  T 
) [static]

Definition at line 1277 of file bignum.c.

References ciL, mpi_cmp_abs(), mpi_mul_hlp(), mpi_sub_hlp(), mpi::n, and mpi::p.

Referenced by mpi_exp_mod(), and mpi_montred().

static void mpi_montred ( mpi *  A,
mpi *  N,
t_int  mm,
mpi *  T 
) [static]

Definition at line 1314 of file bignum.c.

References mpi_montmul(), mpi::n, mpi::p, and mpi::s.

Referenced by mpi_exp_mod().

int mpi_msb ( mpi *  X  ) 

Return the number of most significant bits.

Definition at line 200 of file bignum.c.

References biL, mpi::n, and mpi::p.

Referenced by d2i_RSA_PUBKEY(), main(), mpi_div_mpi(), mpi_exp_mod(), mpi_gen_prime(), mpi_is_prime(), mpi_shift_l(), mpi_size(), mpi_write_string(), rsa_check_pubkey(), rsa_decryption(), rsa_encryption(), and rsa_gen_key().

static void mpi_mul_hlp ( int  i,
t_int *  s,
t_int *  d,
t_int  b 
) [static]

Definition at line 892 of file bignum.c.

References MULADDC_CORE, MULADDC_INIT, and MULADDC_STOP.

Referenced by mpi_montmul(), and mpi_mul_mpi().

int mpi_mul_int ( mpi *  X,
mpi *  A,
t_int  b 
)

Baseline multiplication: X = A * b.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 992 of file bignum.c.

References mpi_mul_mpi(), mpi::n, mpi::p, and mpi::s.

Referenced by mpi_div_mpi(), and mpi_read_string().

int mpi_mul_mpi ( mpi *  X,
mpi *  A,
mpi *  B 
)

Baseline multiplication: X = A * B.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 956 of file bignum.c.

References MPI_CHK, mpi_copy(), mpi_free(), mpi_grow(), mpi_init(), mpi_lset(), mpi_mul_hlp(), mpi::n, mpi::p, and mpi::s.

Referenced by main(), mpi_gcd(), mpi_is_prime(), mpi_mul_int(), mpi_self_test(), rsa_check_privkey(), rsa_gen_key(), and rsa_private().

int mpi_read_binary ( mpi *  X,
unsigned char *  buf,
int  buflen 
)

Import X from unsigned binary data, big endian.

Parameters:
X destination mpi
buf input buffer
buflen input buffer size
Returns:
0 if successful, 1 if memory allocation failed

Definition at line 484 of file bignum.c.

References CHARS_TO_LIMBS, ciL, MPI_CHK, mpi_grow(), mpi_lset(), and mpi::p.

Referenced by asn1_get_mpi(), d2i_RSA_PUBKEY(), dhm_read_bignum(), dhm_read_public(), rsa_private(), and rsa_public().

int mpi_read_file ( mpi *  X,
int  radix,
FILE *  fin 
)

Read X from an opened file.

Parameters:
X destination mpi
radix input numeric base
fin input file handle
Returns:
0 if successful, or an XYSSL_ERR_MPI_XXX error code

Definition at line 391 of file bignum.c.

References mpi_get_digit(), mpi_read_string(), and XYSSL_ERR_MPI_FILE_IO_ERROR.

Referenced by main().

int mpi_read_mystring ( mpi *  X,
int  radix,
char *  s 
)

Definition at line 418 of file bignum.c.

References mpi_get_digit(), and mpi_read_string().

Referenced by rsa_decryption(), and rsa_encryption().

int mpi_read_string ( mpi *  X,
int  radix,
char *  s 
)

Import from an ASCII string.

Parameters:
X destination mpi
radix input numeric base
s null-terminated string buffer
Returns:
0 if successful, or an XYSSL_ERR_MPI_XXX error code

Definition at line 243 of file bignum.c.

References BITS_TO_LIMBS, ciL, int, mpi_add_int(), MPI_CHK, mpi_free(), mpi_get_digit(), mpi_grow(), mpi_init(), mpi_lset(), mpi_mul_int(), mpi::p, mpi::s, and XYSSL_ERR_MPI_BAD_INPUT_DATA.

Referenced by main(), mpi_read_file(), mpi_read_mystring(), mpi_self_test(), rsa_self_test(), and ssl_set_dh_param().

int mpi_self_test ( int  verbose  ) 

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Definition at line 1854 of file bignum.c.

References MPI_CHK, mpi_cmp_mpi(), mpi_div_mpi(), mpi_exp_mod(), mpi_free(), mpi_init(), mpi_inv_mod(), mpi_mul_mpi(), and mpi_read_string().

Referenced by main().

int mpi_shift_l ( mpi *  X,
int  count 
)

Left-shift: X <<= count.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 526 of file bignum.c.

References biL, BITS_TO_LIMBS, MPI_CHK, mpi_grow(), mpi_msb(), mpi::n, and mpi::p.

Referenced by mpi_div_mpi(), mpi_exp_mod(), and mpi_gen_prime().

int mpi_shift_r ( mpi *  X,
int  count 
)

Right-shift: X >>= count.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 575 of file bignum.c.

References biL, mpi::n, and mpi::p.

Referenced by dhm_make_params(), dhm_make_public(), mpi_div_mpi(), mpi_gcd(), mpi_gen_prime(), mpi_inv_mod(), and mpi_is_prime().

int mpi_size ( mpi *  X  ) 

Return the total size in bytes.

Definition at line 218 of file bignum.c.

References mpi_msb().

Referenced by dhm_calc_secret(), dhm_make_params(), dhm_read_params(), mpi_write_binary(), x509parse_crt(), and x509parse_key().

int mpi_sub_abs ( mpi *  X,
mpi *  A,
mpi *  B 
)

Unsigned substraction: X = |A| - |B|.

Returns:
0 if successful, XYSSL_ERR_MPI_NEGATIVE_VALUE if B is greater than A

Definition at line 761 of file bignum.c.

References MPI_CHK, mpi_cmp_abs(), mpi_copy(), mpi_free(), mpi_init(), mpi_sub_hlp(), mpi::n, mpi::p, and XYSSL_ERR_MPI_NEGATIVE_VALUE.

Referenced by mpi_add_mpi(), mpi_gcd(), and mpi_sub_mpi().

static void mpi_sub_hlp ( int  n,
t_int *  s,
t_int *  d 
) [static]

Definition at line 740 of file bignum.c.

Referenced by mpi_montmul(), and mpi_sub_abs().

int mpi_sub_int ( mpi *  X,
mpi *  A,
int  b 
)

Signed substraction: X = A - b.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 876 of file bignum.c.

References mpi_sub_mpi(), mpi::n, mpi::p, and mpi::s.

Referenced by main(), mpi_gen_prime(), mpi_is_prime(), rsa_check_privkey(), and rsa_gen_key().

int mpi_sub_mpi ( mpi *  X,
mpi *  A,
mpi *  B 
)

Signed substraction: X = A - B.

Returns:
0 if successful, 1 if memory allocation failed

Definition at line 829 of file bignum.c.

References mpi_add_abs(), MPI_CHK, mpi_cmp_abs(), mpi_sub_abs(), and mpi::s.

Referenced by mpi_div_mpi(), mpi_inv_mod(), mpi_mod_mpi(), mpi_sub_int(), and rsa_private().

void mpi_swap ( mpi *  X,
mpi *  Y 
)

Swap the contents of X and Y.

Definition at line 155 of file bignum.c.

Referenced by rsa_gen_key().

int mpi_write_binary ( mpi *  X,
unsigned char *  buf,
int  buflen 
)

Export X into unsigned binary data, big endian.

Parameters:
X source mpi
buf output buffer
buflen output buffer size
Returns:
0 if successful, XYSSL_ERR_MPI_BUFFER_TOO_SMALL if buf isn't large enough
Note:
Call this function with *buflen = 0 to obtain the minimum required buffer size in *buflen.

Definition at line 506 of file bignum.c.

References ciL, mpi_size(), mpi::p, and XYSSL_ERR_MPI_BUFFER_TOO_SMALL.

Referenced by dhm_calc_secret(), dhm_make_public(), rsa_private(), and rsa_public().

int mpi_write_file ( char *  p,
mpi *  X,
int  radix,
FILE *  fout 
)

Write X into an opened file, or stdout.

Parameters:
p prefix, can be NULL
X source mpi
radix output numeric base
fout output file handle
Returns:
0 if successful, or an XYSSL_ERR_MPI_XXX error code
Note:
Set fout == NULL to print X on the console.

Definition at line 447 of file bignum.c.

References MPI_CHK, mpi_write_string(), and XYSSL_ERR_MPI_FILE_IO_ERROR.

Referenced by generate_RSA_keys_ciphertext(), generate_RSA_keys_plaintext(), and main().

static int mpi_write_hlp ( mpi *  X,
int  radix,
char **  p 
) [static]

Definition at line 301 of file bignum.c.

References MPI_CHK, mpi_cmp_int(), mpi_div_int(), mpi_mod_int(), and XYSSL_ERR_MPI_BAD_INPUT_DATA.

Referenced by mpi_write_string().

int mpi_write_string ( mpi *  X,
int  radix,
char *  s,
int *  slen 
)

Export into an ASCII string.

Parameters:
X source mpi
radix output numeric base
s string buffer
slen string buffer size
Returns:
0 if successful, or an XYSSL_ERR_MPI_XXX error code
Note:
Call this function with *slen = 0 to obtain the minimum required buffer size in *slen.

Definition at line 328 of file bignum.c.

References ciL, MPI_CHK, mpi_copy(), mpi_free(), mpi_init(), mpi_msb(), mpi_write_hlp(), mpi::n, mpi::p, mpi::s, XYSSL_ERR_MPI_BAD_INPUT_DATA, and XYSSL_ERR_MPI_BUFFER_TOO_SMALL.

Referenced by mpi_write_file().

Variable Documentation

const int small_prime[] [static]
Initial value:
{
        3,    5,    7,   11,   13,   17,   19,   23,
       29,   31,   37,   41,   43,   47,   53,   59,
       61,   67,   71,   73,   79,   83,   89,   97,
      101,  103,  107,  109,  113,  127,  131,  137,
      139,  149,  151,  157,  163,  167,  173,  179,
      181,  191,  193,  197,  199,  211,  223,  227,
      229,  233,  239,  241,  251,  257,  263,  269,
      271,  277,  281,  283,  293,  307,  311,  313,
      317,  331,  337,  347,  349,  353,  359,  367,
      373,  379,  383,  389,  397,  401,  409,  419,
      421,  431,  433,  439,  443,  449,  457,  461,
      463,  467,  479,  487,  491,  499,  503,  509,
      521,  523,  541,  547,  557,  563,  569,  571,
      577,  587,  593,  599,  601,  607,  613,  617,
      619,  631,  641,  643,  647,  653,  659,  661,
      673,  677,  683,  691,  701,  709,  719,  727,
      733,  739,  743,  751,  757,  761,  769,  773,
      787,  797,  809,  811,  821,  823,  827,  829,
      839,  853,  857,  859,  863,  877,  881,  883,
      887,  907,  911,  919,  929,  937,  941,  947,
      953,  967,  971,  977,  983,  991,  997, -103
}

Definition at line 1639 of file bignum.c.

Referenced by mpi_is_prime().

Generated on Tue Dec 28 15:15:29 2010 for Mobile-C by  doxygen 1.6.3