diff options
Diffstat (limited to 'crypto/bn/bn_intern.c')
| -rw-r--r-- | crypto/bn/bn_intern.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/crypto/bn/bn_intern.c b/crypto/bn/bn_intern.c index a0cfcff303..cf2b33630e 100644 --- a/crypto/bn/bn_intern.c +++ b/crypto/bn/bn_intern.c @@ -84,13 +84,14 @@ signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len) return r; } - if (w <= 0 || w > 7) { /* 'signed char' can represent integers with absolute values less than 2^7 */ + if (w <= 0 || w > 7) { /* 'signed char' can represent integers with + * absolute values less than 2^7 */ BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_INTERNAL_ERROR); goto err; } - bit = 1 << w; /* at most 128 */ - next_bit = bit << 1; /* at most 256 */ - mask = next_bit - 1; /* at most 255 */ + bit = 1 << w; /* at most 128 */ + next_bit = bit << 1; /* at most 256 */ + mask = next_bit - 1; /* at most 255 */ if (BN_is_negative(scalar)) { sign = -1; @@ -113,7 +114,9 @@ signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len) } window_val = scalar->d[0] & mask; j = 0; - while ((window_val != 0) || (j + w + 1 < len)) { /* if j+w+1 >= len, window_val will not increase */ + while ((window_val != 0) || (j + w + 1 < len)) { /* if j+w+1 >= len, + * window_val will not + * increase */ int digit = 0; /* 0 <= window_val <= 2^(w+1) */ @@ -124,7 +127,7 @@ signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len) if (window_val & bit) { digit = window_val - next_bit; /* -2^w < digit < 0 */ -#if 1 /* modified wNAF */ +#if 1 /* modified wNAF */ if (j + w + 1 >= len) { /* * Special case for generating modified wNAFs: @@ -147,10 +150,12 @@ signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len) window_val -= digit; - /* now window_val is 0 or 2^(w+1) in standard wNAF generation; + /* + * now window_val is 0 or 2^(w+1) in standard wNAF generation; * for modified window NAFs, it may also be 2^w */ - if (window_val != 0 && window_val != next_bit && window_val != bit) { + if (window_val != 0 && window_val != next_bit + && window_val != bit) { BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_INTERNAL_ERROR); goto err; } @@ -203,7 +208,8 @@ void bn_set_all_zero(BIGNUM *a) { int i; - for (i = a->top; i < a->dmax; i++) a->d[i] = 0; + for (i = a->top; i < a->dmax; i++) + a->d[i] = 0; } int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size) @@ -243,6 +249,3 @@ BIGNUM *bn_array_el(BIGNUM *base, int el) { return &base[el]; } - - - |