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tarcieri
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Jul 30, 2022
- Ensure modulus is 16384-bits or fewer. See Denial of Service (DoS) via Large Public Key #166
- Increase maximum public exponent. Closes MAX_PUB_EXPONENT is somewhat small #155
tarcieri
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Jul 30, 2022
This commit fixes #166 by enforcing a 4096-bit upper limit by default, which prevents potential DoS by using maliciously large RSA keys. The PKCS#1/PKCS#8 parsers use this API, limiting the size of keys parsed from these formats to 4096-bits. An `RsaPrivateKey::new_large` constructor has been added which enforces the 16384-bit limit added in #170. This can be used for unusual applications that need to support larger keys. `RsaPrivateKey::from_components` uses the `::new_large` constructor, so private keys follow the 16384-bit limit only. The `RsaPrivateKey::MAX_SIZE` and `RsaPrivateKey::MAX_SIZE_LARGE` inherent constants specify the maximum allowed sizes.
takumi-earth
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Jan 27, 2026
- Ensure modulus is 16384-bits or fewer. See RustCrypto#166 - Increase maximum public exponent. Closes RustCrypto#155
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