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810abb6b21
It's just a sha256_double, but importantly when we convert it to a string (in type_to_string, which is used in logging) we use bitcoin_blkid_to_hex() so it's reversed as people expect. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
15 lines
414 B
C
15 lines
414 B
C
#include "shadouble.h"
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#include <ccan/mem/mem.h>
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void sha256_double(struct sha256_double *shadouble, const void *p, size_t len)
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{
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sha256(&shadouble->sha, memcheck(p, len), len);
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sha256(&shadouble->sha, &shadouble->sha, sizeof(shadouble->sha));
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}
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void sha256_double_done(struct sha256_ctx *shactx, struct sha256_double *res)
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{
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sha256_done(shactx, &res->sha);
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sha256(&res->sha, &res->sha, sizeof(res->sha));
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}
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