ecdsa: add EcdsaCurve marker trait#787
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This trait is the intended successor to the `SignPrimitive` and `VerifyPrimitive` traits. Currently the only reason for a non-default impl of those traits is to handle low-S normalization. The `EcdsaCurve` trait now not only marks the curve as being safe for use with ECDSA, but also captures this decision regarding low-S normalization so it doesn't have to be expressed in code.
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This is a marker trait added in RustCrypto/signatures#787 which marks an elliptic curve as being intended for use with ECDSA. It's the intended successor of the `SignPrimitive` and `VerifyPrimitive` traits, carrying with it the one bit of information needed to eliminate the need for custom impls: a flag for low-S normalization. `bp256`, `bp384`, `k256`, `p192`, `p224`, `p256`, `p384`, and `p521` have all received trait impls. Of those, only `k256` has the `NORMALIZE_S` flag set to `true`.
tarcieri
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Moves the trait added in #787 out of the `hazmat` module and into the toplevel, so it's available regardless of whether or not the `hazmat` feature has been enabled.
tarcieri
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Jan 17, 2024
Moves the trait added in #787 out of the `hazmat` module and into the toplevel, so it's available regardless of whether or not the `hazmat` feature has been enabled.
tarcieri
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to RustCrypto/elliptic-curves
that referenced
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Jan 17, 2024
This is a marker trait added in RustCrypto/signatures#787 which marks an elliptic curve as being intended for use with ECDSA. It's the intended successor of the `SignPrimitive` and `VerifyPrimitive` traits, carrying with it the one bit of information needed to eliminate the need for custom impls: a flag for low-S normalization. `bp256`, `bp384`, `k256`, `p192`, `p224`, `p256`, `p384`, and `p521` have all received trait impls. Of those, only `k256` has the `NORMALIZE_S` flag set to `true`.
tarcieri
added a commit
to RustCrypto/elliptic-curves
that referenced
this pull request
Jan 17, 2024
This is a marker trait added in RustCrypto/signatures#787 which marks an elliptic curve as being intended for use with ECDSA. It's the intended successor of the `SignPrimitive` and `VerifyPrimitive` traits, carrying with it the one bit of information needed to eliminate the need for custom impls: a flag for low-S normalization. `bp256`, `bp384`, `k256`, `p192`, `p224`, `p256`, `p384`, and `p521` have all received trait impls. Of those, only `k256` has the `NORMALIZE_S` flag set to `true`.
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This trait is the intended successor to the
SignPrimitiveandVerifyPrimitivetraits.Currently the only reason for a non-default impl of those traits is to handle low-S normalization. The
EcdsaCurvetrait now not only marks the curve as being safe for use with ECDSA, but also captures this decision regarding low-S normalization so it doesn't have to be expressed in code.