Optimize Montgomery to Edwards conversions #1308
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daxpedda
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I'm a little confused what's happening here. The input and output types are both |
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Indeed. As I was saying in the OP: this is currently only used in hash2curve. This PR just improves existing code, I didn't add this function. But #1306 properly exposes this function to users and the Montgomery to Edwards conversion. Alternatively we can just close this as this improvement is included in #1306. |
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This PR updates the Montgomery to Edwards isogeny mapping to a more optimized version.
Notably reducing inversions from two to one.
This is currently only used for hash2curve, which actually has a more optimized mapping I will add in a different PR. This functionality will however be used when adding Montgomery to Edwards conversions in #1306.