diff options
Diffstat (limited to 'third_party/srtp/crypto/math/math.c')
| -rw-r--r-- | third_party/srtp/crypto/math/math.c | 174 |
1 files changed, 9 insertions, 165 deletions
diff --git a/third_party/srtp/crypto/math/math.c b/third_party/srtp/crypto/math/math.c index 3e619979..7f0bcd2b 100644 --- a/third_party/srtp/crypto/math/math.c +++ b/third_party/srtp/crypto/math/math.c @@ -42,8 +42,11 @@ * */ +#ifdef HAVE_CONFIG_H + #include <config.h> +#endif + #include "crypto_math.h" -#include <stdlib.h> /* malloc() used in bitvector_alloc */ int octet_weight[256] = { @@ -173,7 +176,7 @@ v32_weight(v32_t a) { return wt; } -inline unsigned char +unsigned char v32_distance(v32_t x, v32_t y) { x.value ^= y.value; return v32_weight(x); @@ -524,13 +527,13 @@ A_times_x_plus_b(uint8_t A[8], uint8_t x, uint8_t b) { return b; } -inline void +void v16_copy_octet_string(v16_t *x, const uint8_t s[2]) { x->v8[0] = s[0]; x->v8[1] = s[1]; } -inline void +void v32_copy_octet_string(v32_t *x, const uint8_t s[4]) { x->v8[0] = s[0]; x->v8[1] = s[1]; @@ -538,7 +541,7 @@ v32_copy_octet_string(v32_t *x, const uint8_t s[4]) { x->v8[3] = s[3]; } -inline void +void v64_copy_octet_string(v64_t *x, const uint8_t s[8]) { x->v8[0] = s[0]; x->v8[1] = s[1]; @@ -632,7 +635,7 @@ v128_set_bit_to(v128_t *x, int i, int y){ #endif /* DATATYPES_USE_MACROS */ -inline void +static inline void v128_left_shift2(v128_t *x, int num_bits) { int i; int word_shift = num_bits >> 5; @@ -773,165 +776,6 @@ octet_string_set_to_zero(uint8_t *s, int len) { } -/* functions manipulating bit_vector_t */ - -#define BITVECTOR_MAX_WORDS 5 - -int -bitvector_alloc(bitvector_t *v, unsigned long length) { - unsigned long l = (length + bytes_per_word - 1) / bytes_per_word; - int i; - - /* allocate memory, then set parameters */ - if (l > BITVECTOR_MAX_WORDS) - return -1; - else - l = BITVECTOR_MAX_WORDS; - v->word = malloc(l); - if (v->word == NULL) - return -1; - v->length = length; - - /* initialize bitvector to zero */ - for (i=0; i < (length >> 5); i++) { - v->word = 0; - } - - return 0; -} - -void -bitvector_set_bit(bitvector_t *v, int bit_index) { - - v->word[(bit_index >> 5)] |= (1 << (bit_index & 31)); - -} - -int -bitvector_get_bit(const bitvector_t *v, int bit_index) { - - return ((v->word[(bit_index >> 5)]) >> (bit_index & 31)) & 1; - -} - -#include <stdio.h> - -int -bitvector_print_hex(const bitvector_t *v, FILE *stream) { - int i; - int m = v->length >> 5; - int n = v->length & 31; - char string[9]; - uint32_t tmp; - - /* if length isn't a multiple of four, we can't hex_print */ - if (n & 3) - return -1; - - /* if the length is zero, do nothing */ - if (v->length == 0) - return 0; - - /* - * loop over words from most significant to least significant - - */ - - for (i=m; i > 0; i++) { - char *str = string + 7; - tmp = v->word[i]; - - /* null terminate string */ - string[8] = 0; - - /* loop over nibbles */ - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); tmp >>= 4; - *str-- = nibble_to_hex_char(tmp & 0xf); - - /* now print stream */ - fprintf(stream, string); - } - - return 0; - -} - - -int -hex_string_length(char *s) { - int count = 0; - - /* ignore leading zeros */ - while ((*s != 0) && *s == '0') - s++; - - /* count remaining characters */ - while (*s != 0) { - if (hex_char_to_nibble(*s++) == -1) - return -1; - count++; - } - - return count; -} - -int -bitvector_set_from_hex(bitvector_t *v, char *string) { - int num_hex_chars, m, n, i, j; - uint32_t tmp; - - num_hex_chars = hex_string_length(string); - if (num_hex_chars == -1) - return -1; - - /* set length */ - v->length = num_hex_chars * 4; - /* - * at this point, we should subtract away a bit if the high - * bit of the first character is zero, but we ignore that - * for now and assume that we're four-bit aligned - DAM - */ - - - m = num_hex_chars / 8; /* number of words */ - n = num_hex_chars % 8; /* number of nibbles in last word */ - - /* if the length is greater than the bitvector, return an error */ - if (m > BITVECTOR_MAX_WORDS) - return -1; - - /* - * loop over words from most significant - first word is a special - * case - */ - - if (n) { - tmp = 0; - for (i=0; i < n; i++) { - tmp = hex_char_to_nibble(*string++); - tmp <<= 4; - } - v->word[m] = tmp; - } - - /* now loop over the rest of the words */ - for (i=m-1; i >= 0; i--) { - tmp = 0; - for (j=0; j < 8; j++) { - tmp = hex_char_to_nibble(*string++); - tmp <<= 4; - } - v->word[i] = tmp; - } - - return 0; -} - /* functions below not yet tested! */ |