krb5_c_crypto_length_iov - Fill in lengths for header, trailer and padding in a IOV array. — MIT Kerberos Documentation

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# krb5_c_crypto_length_iov - Fill in lengths for header, trailer and padding in a IOV array.

krb5_error_code krb5_c_crypto_length_iov(krb5_context context, krb5_enctype enctype, krb5_crypto_iov *data, size_t num_data)

param:

  [in] context - Library context

  [in] enctype - Encryption type

  [inout] data - IOV array

  [in] num_data - Size of data

retval:

  - 0 Success; otherwise - Kerberos error codes

Padding is set to the actual padding required based on the provided data buffers. Typically this API is used after setting up the data buffers and KRB5_CRYPTO_TYPE_SIGN_ONLY buffers, but before actually allocating header, trailer and padding.