Calculating the size of ciphertext created by versioned keys

To calculate the size of ciphertext

Call the I_C_CalculateOutputSizeForKey API to determine the size of the ciphertext. You need to know this to allocate enough space for the ciphertext.

When using versioned keys, I_C_CalculateOutputSize does not return the correct value. You must use I_C_CalculateOutputSizeForKey instead.

Use I_C_CalculateOutputSizeForKey to determine the size of the ciphertext when the size of the plaintext and the cipher are input.

Example

rc = I_C_CalculateOutputSizeForKey(session, cipherspec, I_T_Operation_Encrypt,indatalen, &encdatalen);