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RSA blinding factor may not have an inverse mod n #426

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tomato42 opened this issue Oct 18, 2020 · 0 comments
Open

RSA blinding factor may not have an inverse mod n #426

tomato42 opened this issue Oct 18, 2020 · 0 comments
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bug unintented behaviour in tlslite-ng code good first issue relatively simple changes, good for first time contributors help wanted
Milestone
someday/future

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@tomato42
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tomato42 commented Oct 18, 2020 •
edited

In RSA code we generate a blinding factor as simple integer mod n:
https://github.com/tomato42/tlslite-ng/blob/9951ec1c769617247a80aa1cae661ec0edc68823/tlslite/utils/python_rsakey.py#L65-L70

we should verify that it's relatively prime to n (by calculating gcd() and checking if it is 1) before using it.
@tomato42 tomato42 added bug unintented behaviour in tlslite-ng code help wanted good first issue relatively simple changes, good for first time contributors labels Oct 18, 2020
@tomato42 tomato42 added this to the someday/future milestone Oct 18, 2020
@tomato42 tomato42 changed the title RSA blinding factor may not have an inverse mod m RSA blinding factor may not have an inverse mod n Oct 18, 2020
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