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| author | Markus Teich <markus.teich@stusta.mhn.de> | 2016-09-23 16:31:06 +0200 |
|---|---|---|
| committer | Markus Teich <markus.teich@stusta.mhn.de> | 2016-09-23 16:31:06 +0200 |
| commit | e08789c72754944f965a2e3bb4ea2c41f50fa138 (patch) | |
| tree | c8605f76f0586ab1b238195c4cdec733a8d541bc /crypto.c | |
| parent | d6cdd80c8c58e6fa66f1796275616d045f16fad6 (diff) | |
| download | libbrandt-e08789c72754944f965a2e3bb4ea2c41f50fa138.tar.gz libbrandt-e08789c72754944f965a2e3bb4ea2c41f50fa138.zip | |
fix bug in public first price outcome determination
We have to divide out the amount of bidders to get the correct result.
Diffstat (limited to 'crypto.c')
| -rw-r--r-- | crypto.c | 3 |
1 files changed, 3 insertions, 0 deletions
| @@ -1191,6 +1191,9 @@ fp_pub_determine_outcome (struct BRANDT_Auction *ad, | |||
| 1191 | dlogi = GNUNET_CRYPTO_ecc_dlog (ec_dlogctx, sum_gamma); | 1191 | dlogi = GNUNET_CRYPTO_ecc_dlog (ec_dlogctx, sum_gamma); |
| 1192 | brandt_assert (dlogi > 0); | 1192 | brandt_assert (dlogi > 0); |
| 1193 | 1193 | ||
| 1194 | /* all bidders participated with a multiplicative share */ | ||
| 1195 | dlogi /= ad->n; | ||
| 1196 | |||
| 1194 | /* can only support up to bits(dlogi) bidders */ | 1197 | /* can only support up to bits(dlogi) bidders */ |
| 1195 | brandt_assert (sizeof (int) * 8 - 1 >= ad->n); | 1198 | brandt_assert (sizeof (int) * 8 - 1 >= ad->n); |
| 1196 | for (uint16_t i = 0; i < ad->n; i++) | 1199 | for (uint16_t i = 0; i < ad->n; i++) |