| // Copyright 2021 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| #pragma once |
| |
| #include "pw_bytes/span.h" |
| #include "pw_status/status.h" |
| |
| namespace pw::crypto::ecdsa { |
| |
| // VerifyP256Signature verifies the `signature` of `digest` using `public_key`. |
| // |
| // `public_key` is a byte string in SEC 1 uncompressed form (0x04||X||Y), which |
| // is exactly 65 bytes. Compressed forms (02/03||X) *may* not be supported |
| // by some backends, e.g. Mbed TLS. |
| // |
| // `digest` is a raw byte string, truncated to 32 bytes. |
| // |
| // `signature` is a raw byte string (r||s) of exactly 64 bytes. |
| // |
| // Returns Status::OkStatus() for a successful verification, or an error Status |
| // otherwise. |
| Status VerifyP256Signature(ConstByteSpan public_key, |
| ConstByteSpan digest, |
| ConstByteSpan signature); |
| |
| } // namespace pw::crypto::ecdsa |
