HRESULT 0x80092024 (CRYPT_E_NOT_CHAR_STRING): meaning and diagnosis

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CERT_NAME_VALUE uses a binary value type where character text is required.

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CRYPT_E_INVALID_X500_STRING	CRYPT_E_FILERESIZED

CRYPT_E_NOT_CHAR_STRING

The value type controls how the blob is interpreted

CRYPT_E_NOT_CHAR_STRING indicates that the dwValueType in a CERT_NAME_VALUE is not one of the character-string types expected by the operation. Values such as CERT_RDN_ENCODED_BLOB and CERT_RDN_OCTET_STRING contain binary data and cannot be processed as null-terminated text.

This is not evidence that the bytes are corrupt. The same Value member is a byte-counted blob whose interpretation depends entirely on dwValueType. Passing an encoded ASN.1 object to a function that expects a decoded Unicode or narrow-character string creates a type error even if the underlying object is valid.

What to verify

Record dwValueType together with cbData and the calling function.
Decode an encoded blob before requesting text conversion.
Do not assume pbData is null-terminated when the value is binary.
Use CertRDNValueToStr only with a supported RDN string representation.

References

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