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CRYPT_E_SECURITY_SETTINGS
A local security option blocked the cryptographic operation. This points to policy or system configuration, not necessarily to malformed input.
What to check
- Record the API, algorithm, key usage, and account context that were active when the policy denied the operation.
- Compare the effective local and domain security policy with the cryptographic requirements of the application.
- Change policy only after confirming the required security properties; do not weaken system cryptography globally to make one legacy object work.
Microsoft: CertVerifyCertificateChainPolicy
Microsoft: CertGetCertificateChain
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