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misc/simulators/hashbasedsig.py: fix minor miscalculation bug.

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Signed-off-by: Daira Hopwood <daira@jacaranda.org>
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Daira Hopwood 2014-02-25 16:55:19 +00:00
parent b262f656f4
commit 40c12fc736
1 changed files with 1 additions and 1 deletions
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misc/simulators/hashbasedsig.py
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@ -164,7 +164,7 @@ def calculate(K, K1, K2, q_max, L_hash, trees):
# n is the number of digits needed to sign the message representative and checksum. # n is the number of digits needed to sign the message representative and checksum.
# The representation is base-B, except that we allow the most significant digit # The representation is base-B, except that we allow the most significant digit
# to be up to 2B-1. # to be up to 2B-1.
n_L = ceil_div(L_hash-1, lg(B)) n_L = ceil_div(L_hash, lg(B))
firstL_max = floor_div(pow(2, L_hash)-1, pow(B, n_L-1)) firstL_max = floor_div(pow(2, L_hash)-1, pow(B, n_L-1))
C_max = firstL_max + (n_L-1)*(B-1) C_max = firstL_max + (n_L-1)*(B-1)
n_C = ceil_log(ceil_div(C_max, 2), B) n_C = ceil_log(ceil_div(C_max, 2), B)