CMSG_CTRL_VERIFY_SIGNATURE_EX_PARA (Compact 2013)

3/28/2014

This structure contains information used to verify a message signature. It contains the signer index and signer public key. The signer public key can be the signer's CERT_PUBLIC_KEY_INFO structure, certificate context, or chain context.

Syntax

typedef struct _CMSG_CTRL_VERIFY_SIGNATURE_EX_PARA {
  DWORD cbSize;
  HCRYPTPROV hCryptProv;
  DWORD dwSignerIndex;
  DWORD dwSignerType;
  void* pvSigner;
} CMSG_CTRL_VERIFY_SIGNATURE_EX_PARA, *PCMSG_CTRL_VERIFY_SIGNATURE_EX_PARA;

Members

• cbSize
  Size of this structure in bytes.

• hCryptProv
  Handle to the cryptographic provider that is used to verify the signature. If NULL, the cryptographic provider specified in CryptMsgOpenToDecode is used. If the hCryptProv in CryptMsgOpenToDecode is also NULL, the default provider according to the signer's public key OID is used.

• dwSignerIndex
  Index of the signer in the message.

• dwSignerType
  Indication of the structure containing the signer information. The following table shows the predefined values and the structures indicated.

  Value	Description
  CMSG_VERIFY_SIGNER_PUBKEY	CERT_PUBLIC_KEY_INFO
  CMSG_VERIFY_SIGNER_CERT	CCERT_CONTEXT
  CMSG_VERIFY_SIGNER_CHAIN	CERT_CHAIN_CONTEXT
  CMSG_VERIFY_SIGNER_NULL	NULL

• pvSigner
  Pointer to a CERT_PUBLIC_KEY_INFO structure, a certificate context, a chain context, or NULL depending on the value of dwSignerType.

Remarks

If dwSignerType is CMSG_VERIFY_SIGNER_NULL, the signature is expected to contain only the unencrypted hash octets.

Requirements

See Also

Reference

Cryptography Structures