gnutls_buffer_append_data - Linux
Overview
gnutls_buffer_append_data
appends data to the end of a gnutls_buffer
instance. It is primarily used to create or modify application data such as certificates, credentials, or messages in the context of secure network communications using the GnuTLS library.
Syntax
int gnutls_buffer_append_data(gnutls_buffer_t *buffer, const void *data, size_t length)
Options/Flags
- buffer: Pointer to the
gnutls_buffer
instance where data will be appended. - data: Pointer to the data that will be appended.
- length: Length of the data to be appended.
Examples
Simple Append:
char *message = "Hello World";
gnutls_buffer_t buffer;
gnutls_buffer_init(&buffer);
gnutls_buffer_append_data(&buffer, message, strlen(message));
Concatenating Multiple Strings:
gnutls_buffer_t buffer;
gnutls_buffer_init(&buffer);
gnutls_buffer_append_data(&buffer, "Hello ", 6);
gnutls_buffer_append_data(&buffer, "World", 5);
Common Issues
- Buffer Overflow: Make sure that the
length
of the data to be appended does not exceed the available space in thegnutls_buffer
. - Memory Leaks: Remember to free the memory allocated by
gnutls_buffer
usinggnutls_buffer_destroy()
to avoid leaks.
Integration
gnutls_buffer_append_data
is often used in conjunction with other GnuTLS functions for secure data handling and network communication.
- TLS Handshake: Appending certificates and credentials to a buffer for transmission during TLS handshake.
- Message Exchange: Appending application data to a buffer for encrypted transmission.
Related Commands
gnutls_buffer_init()
– Initializes agnutls_buffer
instance.gnutls_buffer_destroy()
– Destroys agnutls_buffer
instance and frees its allocated memory.gnutls_buffer_size()
– Returns the size of data stored in agnutls_buffer
.gnutls_buffer_data()
– Returns a pointer to the data stored in agnutls_buffer
.