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Merge bitcoin-core/secp256k1#1205: field: Improve docs +tests of secp256k1_fe_set_b32

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162da73e9a tests: Add debug helper for printing buffers (Tim Ruffing)
e9fd3dff76 field: Improve docs and tests of secp256k1_fe_set_b32 (Tim Ruffing)
ca92a35d01 field: Simplify code in secp256k1_fe_set_b32 (Tim Ruffing)
d93f62e369 field: Verify field element even after secp256k1_fe_set_b32 fails (Tim Ruffing)

Pull request description:

ACKs for top commit:
  jonasnick:
    ACK 162da73e9a

Tree-SHA512: b3ed8e45c969d0420275ff154462f3820b72b57832ccba1f6f427e0cfd9cff3e27440c20994f69ea33a576b1903eb7f04a989f0dbd574bbd96ee56c6dd4500f7
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Jonas Nick
2023-04-21 16:22:53 +00:00
parent f6bef03c0a 162da73e9a
commit 1f33bb2b1c
4 changed files with 90 additions and 13 deletions
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src/field.h
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@@ -75,7 +75,9 @@ static int secp256k1_fe_equal_var(const secp256k1_fe *a, const secp256k1_fe *b);
/** Compare two field elements. Requires both inputs to be normalized */
static int secp256k1_fe_cmp_var(const secp256k1_fe *a, const secp256k1_fe *b);
/** Set a field element equal to 32-byte big endian value. If successful, the resulting field element is normalized. */
/** Set a field element equal to 32-byte big endian value.
* Returns 1 if no overflow occurred, and then the output is normalized.
* Returns 0 if overflow occurred, and then the output is only weakly normalized. */
static int secp256k1_fe_set_b32(secp256k1_fe *r, const unsigned char *a);
/** Convert a field element to a 32-byte big endian value. Requires the input to be normalized */