view libtommath/bn_deprecated.c @ 1930:299f4f19ba19

Add /usr/sbin and /sbin to default root PATH When dropbear is used in a very restricted environment (such as in a initrd), the default user shell is often also very restricted and doesn't take care of setting the PATH so the user ends up with the PATH set by dropbear. Unfortunately, dropbear always sets "/usr/bin:/bin" as default PATH even for the root user which should have /usr/sbin and /sbin too. For a concrete instance of this problem, see the "Remote Unlocking" section in this tutorial: https://paxswill.com/blog/2013/11/04/encrypted-raspberry-pi/ It speaks of a bug in the initramfs script because it's written "blkid" instead of "/sbin/blkid"... this is just because the scripts from the initramfs do not expect to have a PATH without the sbin directories and because dropbear is not setting the PATH appropriately for the root user. I'm thus suggesting to use the attached patch to fix this misbehaviour (I did not test it, but it's easy enough). It might seem anecdotic but multiple Kali users have been bitten by this. From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903403
author Raphael Hertzog <hertzog@debian.org>
date Mon, 09 Jul 2018 16:27:53 +0200
parents 1051e4eea25a
children
line wrap: on
line source

#include "tommath_private.h"
#ifdef BN_DEPRECATED_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

#ifdef BN_MP_GET_BIT_C
int mp_get_bit(const mp_int *a, int b)
{
   if (b < 0) {
      return MP_VAL;
   }
   return (s_mp_get_bit(a, (unsigned int)b) == MP_YES) ? MP_YES : MP_NO;
}
#endif
#ifdef BN_MP_JACOBI_C
mp_err mp_jacobi(const mp_int *a, const mp_int *n, int *c)
{
   if (a->sign == MP_NEG) {
      return MP_VAL;
   }
   if (mp_cmp_d(n, 0uL) != MP_GT) {
      return MP_VAL;
   }
   return mp_kronecker(a, n, c);
}
#endif
#ifdef BN_MP_PRIME_RANDOM_EX_C
mp_err mp_prime_random_ex(mp_int *a, int t, int size, int flags, private_mp_prime_callback cb, void *dat)
{
   return s_mp_prime_random_ex(a, t, size, flags, cb, dat);
}
#endif
#ifdef BN_MP_RAND_DIGIT_C
mp_err mp_rand_digit(mp_digit *r)
{
   mp_err err = s_mp_rand_source(r, sizeof(mp_digit));
   *r &= MP_MASK;
   return err;
}
#endif
#ifdef BN_FAST_MP_INVMOD_C
mp_err fast_mp_invmod(const mp_int *a, const mp_int *b, mp_int *c)
{
   return s_mp_invmod_fast(a, b, c);
}
#endif
#ifdef BN_FAST_MP_MONTGOMERY_REDUCE_C
mp_err fast_mp_montgomery_reduce(mp_int *x, const mp_int *n, mp_digit rho)
{
   return s_mp_montgomery_reduce_fast(x, n, rho);
}
#endif
#ifdef BN_FAST_S_MP_MUL_DIGS_C
mp_err fast_s_mp_mul_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs)
{
   return s_mp_mul_digs_fast(a, b, c, digs);
}
#endif
#ifdef BN_FAST_S_MP_MUL_HIGH_DIGS_C
mp_err fast_s_mp_mul_high_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs)
{
   return s_mp_mul_high_digs_fast(a, b, c, digs);
}
#endif
#ifdef BN_FAST_S_MP_SQR_C
mp_err fast_s_mp_sqr(const mp_int *a, mp_int *b)
{
   return s_mp_sqr_fast(a, b);
}
#endif
#ifdef BN_MP_BALANCE_MUL_C
mp_err mp_balance_mul(const mp_int *a, const mp_int *b, mp_int *c)
{
   return s_mp_balance_mul(a, b, c);
}
#endif
#ifdef BN_MP_EXPTMOD_FAST_C
mp_err mp_exptmod_fast(const mp_int *G, const mp_int *X, const mp_int *P, mp_int *Y, int redmode)
{
   return s_mp_exptmod_fast(G, X, P, Y, redmode);
}
#endif
#ifdef BN_MP_INVMOD_SLOW_C
mp_err mp_invmod_slow(const mp_int *a, const mp_int *b, mp_int *c)
{
   return s_mp_invmod_slow(a, b, c);
}
#endif
#ifdef BN_MP_KARATSUBA_MUL_C
mp_err mp_karatsuba_mul(const mp_int *a, const mp_int *b, mp_int *c)
{
   return s_mp_karatsuba_mul(a, b, c);
}
#endif
#ifdef BN_MP_KARATSUBA_SQR_C
mp_err mp_karatsuba_sqr(const mp_int *a, mp_int *b)
{
   return s_mp_karatsuba_sqr(a, b);
}
#endif
#ifdef BN_MP_TOOM_MUL_C
mp_err mp_toom_mul(const mp_int *a, const mp_int *b, mp_int *c)
{
   return s_mp_toom_mul(a, b, c);
}
#endif
#ifdef BN_MP_TOOM_SQR_C
mp_err mp_toom_sqr(const mp_int *a, mp_int *b)
{
   return s_mp_toom_sqr(a, b);
}
#endif
#ifdef S_MP_REVERSE_C
void bn_reverse(unsigned char *s, int len)
{
   if (len > 0) {
      s_mp_reverse(s, (size_t)len);
   }
}
#endif
#ifdef BN_MP_TC_AND_C
mp_err mp_tc_and(const mp_int *a, const mp_int *b, mp_int *c)
{
   return mp_and(a, b, c);
}
#endif
#ifdef BN_MP_TC_OR_C
mp_err mp_tc_or(const mp_int *a, const mp_int *b, mp_int *c)
{
   return mp_or(a, b, c);
}
#endif
#ifdef BN_MP_TC_XOR_C
mp_err mp_tc_xor(const mp_int *a, const mp_int *b, mp_int *c)
{
   return mp_xor(a, b, c);
}
#endif
#ifdef BN_MP_TC_DIV_2D_C
mp_err mp_tc_div_2d(const mp_int *a, int b, mp_int *c)
{
   return mp_signed_rsh(a, b, c);
}
#endif
#ifdef BN_MP_INIT_SET_INT_C
mp_err mp_init_set_int(mp_int *a, unsigned long b)
{
   return mp_init_u32(a, (uint32_t)b);
}
#endif
#ifdef BN_MP_SET_INT_C
mp_err mp_set_int(mp_int *a, unsigned long b)
{
   mp_set_u32(a, (uint32_t)b);
   return MP_OKAY;
}
#endif
#ifdef BN_MP_SET_LONG_C
mp_err mp_set_long(mp_int *a, unsigned long b)
{
   mp_set_u64(a, b);
   return MP_OKAY;
}
#endif
#ifdef BN_MP_SET_LONG_LONG_C
mp_err mp_set_long_long(mp_int *a, unsigned long long b)
{
   mp_set_u64(a, b);
   return MP_OKAY;
}
#endif
#ifdef BN_MP_GET_INT_C
unsigned long mp_get_int(const mp_int *a)
{
   return (unsigned long)mp_get_mag_u32(a);
}
#endif
#ifdef BN_MP_GET_LONG_C
unsigned long mp_get_long(const mp_int *a)
{
   return (unsigned long)mp_get_mag_ul(a);
}
#endif
#ifdef BN_MP_GET_LONG_LONG_C
unsigned long long mp_get_long_long(const mp_int *a)
{
   return mp_get_mag_ull(a);
}
#endif
#ifdef BN_MP_PRIME_IS_DIVISIBLE_C
mp_err mp_prime_is_divisible(const mp_int *a, mp_bool *result)
{
   return s_mp_prime_is_divisible(a, result);
}
#endif
#ifdef BN_MP_EXPT_D_EX_C
mp_err mp_expt_d_ex(const mp_int *a, mp_digit b, mp_int *c, int fast)
{
   (void)fast;
   if (b > MP_MIN(MP_DIGIT_MAX, UINT32_MAX)) {
      return MP_VAL;
   }
   return mp_expt_u32(a, (uint32_t)b, c);
}
#endif
#ifdef BN_MP_EXPT_D_C
mp_err mp_expt_d(const mp_int *a, mp_digit b, mp_int *c)
{
   if (b > MP_MIN(MP_DIGIT_MAX, UINT32_MAX)) {
      return MP_VAL;
   }
   return mp_expt_u32(a, (uint32_t)b, c);
}
#endif
#ifdef BN_MP_N_ROOT_EX_C
mp_err mp_n_root_ex(const mp_int *a, mp_digit b, mp_int *c, int fast)
{
   (void)fast;
   if (b > MP_MIN(MP_DIGIT_MAX, UINT32_MAX)) {
      return MP_VAL;
   }
   return mp_root_u32(a, (uint32_t)b, c);
}
#endif
#ifdef BN_MP_N_ROOT_C
mp_err mp_n_root(const mp_int *a, mp_digit b, mp_int *c)
{
   if (b > MP_MIN(MP_DIGIT_MAX, UINT32_MAX)) {
      return MP_VAL;
   }
   return mp_root_u32(a, (uint32_t)b, c);
}
#endif
#ifdef BN_MP_UNSIGNED_BIN_SIZE_C
int mp_unsigned_bin_size(const mp_int *a)
{
   return (int)mp_ubin_size(a);
}
#endif
#ifdef BN_MP_READ_UNSIGNED_BIN_C
mp_err mp_read_unsigned_bin(mp_int *a, const unsigned char *b, int c)
{
   return mp_from_ubin(a, b, (size_t) c);
}
#endif
#ifdef BN_MP_TO_UNSIGNED_BIN_C
mp_err mp_to_unsigned_bin(const mp_int *a, unsigned char *b)
{
   return mp_to_ubin(a, b, SIZE_MAX, NULL);
}
#endif
#ifdef BN_MP_TO_UNSIGNED_BIN_N_C
mp_err mp_to_unsigned_bin_n(const mp_int *a, unsigned char *b, unsigned long *outlen)
{
   size_t n = mp_ubin_size(a);
   if (*outlen < (unsigned long)n) {
      return MP_VAL;
   }
   *outlen = (unsigned long)n;
   return mp_to_ubin(a, b, n, NULL);
}
#endif
#ifdef BN_MP_SIGNED_BIN_SIZE_C
int mp_signed_bin_size(const mp_int *a)
{
   return (int)mp_sbin_size(a);
}
#endif
#ifdef BN_MP_READ_SIGNED_BIN_C
mp_err mp_read_signed_bin(mp_int *a, const unsigned char *b, int c)
{
   return mp_from_sbin(a, b, (size_t) c);
}
#endif
#ifdef BN_MP_TO_SIGNED_BIN_C
mp_err mp_to_signed_bin(const mp_int *a, unsigned char *b)
{
   return mp_to_sbin(a, b, SIZE_MAX, NULL);
}
#endif
#ifdef BN_MP_TO_SIGNED_BIN_N_C
mp_err mp_to_signed_bin_n(const mp_int *a, unsigned char *b, unsigned long *outlen)
{
   size_t n = mp_sbin_size(a);
   if (*outlen < (unsigned long)n) {
      return MP_VAL;
   }
   *outlen = (unsigned long)n;
   return mp_to_sbin(a, b, n, NULL);
}
#endif
#ifdef BN_MP_TORADIX_N_C
mp_err mp_toradix_n(const mp_int *a, char *str, int radix, int maxlen)
{
   if (maxlen < 0) {
      return MP_VAL;
   }
   return mp_to_radix(a, str, (size_t)maxlen, NULL, radix);
}
#endif
#ifdef BN_MP_TORADIX_C
mp_err mp_toradix(const mp_int *a, char *str, int radix)
{
   return mp_to_radix(a, str, SIZE_MAX, NULL, radix);
}
#endif
#ifdef BN_MP_IMPORT_C
mp_err mp_import(mp_int *rop, size_t count, int order, size_t size, int endian, size_t nails,
                 const void *op)
{
   return mp_unpack(rop, count, order, size, endian, nails, op);
}
#endif
#ifdef BN_MP_EXPORT_C
mp_err mp_export(void *rop, size_t *countp, int order, size_t size,
                 int endian, size_t nails, const mp_int *op)
{
   return mp_pack(rop, SIZE_MAX, countp, order, size, endian, nails, op);
}
#endif
#endif