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Merge rust-bitcoin/rust-secp256k1#592: Document sig verify's intentional limitation 

6e0ae2a7bb Document sig verify's intentional limitation (Thomas M. DuBuisson)

Pull request description:

  This bit of documentation is similar to the secp256k1 C lib comment:

  ```
   * To avoid accepting malleable signatures, only ECDSA signatures in lower-S
   * form are accepted.
   ```

ACKs for top commit:
  apoelstra:
    ACK 6e0ae2a7bb

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This commit is contained in:
Andrew Poelstra 2023-03-29 18:42:13 +00:00
parent d738998486 6e0ae2a7bb
commit 57a4dbc06a
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src/ecdsa/mod.rs
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@ -190,6 +190,7 @@ impl Signature {
} }
/// Verifies an ECDSA signature for `msg` using `pk` and the global [`SECP256K1`] context. /// Verifies an ECDSA signature for `msg` using `pk` and the global [`SECP256K1`] context.
/// The signature must be normalized or verification will fail (see [`normalize_s`]).
#[inline] #[inline]
#[cfg(feature = "global-context")] #[cfg(feature = "global-context")]
#[cfg_attr(docsrs, doc(cfg(feature = "global-context")))] #[cfg_attr(docsrs, doc(cfg(feature = "global-context")))]