gerrit.fd Code Review - trex.git/blob

   1
   2 #include "utils.h"
   3 #include "poly1305_donna.h"
   4 #ifdef HAVE_TI_MODE
   5 # include "poly1305_donna64.h"
   6 #else
   7 # include "poly1305_donna32.h"
   8 #endif
   9
  10 static void
  11 poly1305_update(poly1305_context *ctx, const unsigned char *m,
  12                 unsigned long long bytes) {
  13     poly1305_state_internal_t *st = (poly1305_state_internal_t *)(void *)ctx;
  14     unsigned long long i;
  15
  16     /* handle leftover */
  17     if (st->leftover) {
  18         unsigned long long want = (poly1305_block_size - st->leftover);
  19         if (want > bytes)
  20             want = bytes;
  21         for (i = 0; i < want; i++)
  22             st->buffer[st->leftover + i] = m[i];
  23         bytes -= want;
  24         m += want;
  25         st->leftover += want;
  26         if (st->leftover < poly1305_block_size)
  27             return;
  28         poly1305_blocks(st, st->buffer, poly1305_block_size);
  29         st->leftover = 0;
  30     }
  31
  32     /* process full blocks */
  33     if (bytes >= poly1305_block_size) {
  34         unsigned long long want = (bytes & ~(poly1305_block_size - 1));
  35         poly1305_blocks(st, m, want);
  36         m += want;
  37         bytes -= want;
  38     }
  39
  40     /* store leftover */
  41     if (bytes) {
  42         for (i = 0; i < bytes; i++)
  43             st->buffer[st->leftover + i] = m[i];
  44         st->leftover += bytes;
  45     }
  46 }
  47
  48 int
  49 crypto_onetimeauth_poly1305_donna(unsigned char *out, const unsigned char *m,
  50                                   unsigned long long inlen,
  51                                   const unsigned char *key)
  52 {
  53     poly1305_context ctx;
  54     poly1305_init(&ctx, key);
  55     poly1305_update(&ctx, m, inlen);
  56     poly1305_finish(&ctx, out);
  57
  58     return 0;
  59 }
  60
  61 int
  62 crypto_onetimeauth_poly1305_donna_init(crypto_onetimeauth_poly1305_state *state,
  63                                        const unsigned char *key)
  64 {
  65     poly1305_init((poly1305_context *) state, key);
  66
  67     return 0;
  68 }
  69
  70 int
  71 crypto_onetimeauth_poly1305_donna_update(crypto_onetimeauth_poly1305_state *state,
  72                                          const unsigned char *in,
  73                                          unsigned long long inlen)
  74 {
  75     poly1305_update((poly1305_context *) state, in, inlen);
  76
  77     return 0;
  78 }
  79
  80 int
  81 crypto_onetimeauth_poly1305_donna_final(crypto_onetimeauth_poly1305_state *state,
  82                                         unsigned char *out)
  83 {
  84     poly1305_finish((poly1305_context *) state, out);
  85
  86     return 0;
  87 }
  88
  89 /* LCOV_EXCL_START */
  90 const char *
  91 crypto_onetimeauth_poly1305_donna_implementation_name(void)
  92 {
  93     return POLY1305_IMPLEMENTATION_NAME;
  94 }
  95 /* LCOV_EXCL_STOP */
  96
  97 struct crypto_onetimeauth_poly1305_implementation
  98 crypto_onetimeauth_poly1305_donna_implementation = {
  99     SODIUM_C99(.implementation_name =) crypto_onetimeauth_poly1305_donna_implementation_name,
 100     SODIUM_C99(.onetimeauth =) crypto_onetimeauth_poly1305_donna,
 101     SODIUM_C99(.onetimeauth_verify =) crypto_onetimeauth_poly1305_donna_verify,
 102     SODIUM_C99(.onetimeauth_init =) crypto_onetimeauth_poly1305_donna_init,
 103     SODIUM_C99(.onetimeauth_update =) crypto_onetimeauth_poly1305_donna_update,
 104     SODIUM_C99(.onetimeauth_final =) crypto_onetimeauth_poly1305_donna_final
 105 };