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shachain: allow overriding of number of bits, add cmdline tool.
[ccan]
/
ccan
/
crypto
/
shachain
/
shachain.h
diff --git
a/ccan/crypto/shachain/shachain.h
b/ccan/crypto/shachain/shachain.h
index ba4ba11cd64c02d1d66a362d35bac98e39a2f0bc..90f2380ed39b89d8277db3542e669fcc22f7176e 100644
(file)
--- a/
ccan/crypto/shachain/shachain.h
+++ b/
ccan/crypto/shachain/shachain.h
@@
-11,6
+11,10
@@
#define shachain_index_t uint64_t
#endif
#define shachain_index_t uint64_t
#endif
+#ifndef SHACHAIN_BITS
+#define SHACHAIN_BITS (sizeof(shachain_index_t) * 8)
+#endif
+
/**
* shachain_from_seed - Generate an unpredictable SHA from a seed value.
* @seed: (secret) seed value to use
/**
* shachain_from_seed - Generate an unpredictable SHA from a seed value.
* @seed: (secret) seed value to use
@@
-56,7
+60,7
@@
struct shachain {
struct {
shachain_index_t index;
struct sha256 hash;
struct {
shachain_index_t index;
struct sha256 hash;
- } known[
sizeof(shachain_index_t) * 8
+ 1];
+ } known[
SHACHAIN_BITS
+ 1];
};
/**
};
/**