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/* This example demonstrates how to use the packet parser from C. It
* also serves as a simple benchmark. */
#define _GNU_SOURCE
#include <error.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
#include <sequoia/openpgp.h>
int
main (int argc, char **argv)
{
struct stat st;
int fd;
uint8_t *b;
pgp_status_t rc;
pgp_error_t err;
pgp_packet_parser_result_t ppr;
pgp_packet_parser_t pp;
if (argc != 2)
error (1, 0, "Usage: %s <file>", argv[0]);
if (stat (argv[1], &st))
error (1, errno, "%s", argv[1]);
fd = open (argv[1], O_RDONLY);
if (fd == -1)
error (1, errno, "%s", argv[1]);
b = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
close (fd);
if (b == MAP_FAILED)
error (1, errno, "mmap");
size_t n = 0;
time_t start = time (NULL);
time_t elapsed;
size_t tens_of_s = 0;
ppr = pgp_packet_parser_from_bytes (&err, b, st.st_size);
while (ppr && (pp = pgp_packet_parser_result_packet_parser (ppr)))
{
// Get a reference to the packet that is currently being parsed.
pgp_packet_t p = pgp_packet_parser_packet (pp);
if (pgp_packet_tag(p) == PGP_TAG_LITERAL)
{
// Stream the packet here.
}
// Finish parsing the current packet (returned in p), and read
// the header of the next packet (returned in ppr).
rc = pgp_packet_parser_next (&err, pp, &p, &ppr);
if (rc)
error (1, 0, "pgp_packet_parser_from_bytes: %s",
pgp_error_string (err));
// We now own p. If we want, we can save it in some structure.
// This would be useful when collecting PKESK packets. Either
// way, we need to free it when we are done.
n += 1;
pgp_packet_free (p);
elapsed = time (NULL) - start;
if (elapsed % 10 == 0 && tens_of_s != elapsed / 10)
{
fprintf (stderr,
"Parsed %ld packets in %ld seconds, %.2f packets/s.\n",
n, elapsed, (double) n / (double) elapsed);
fflush (stderr);
tens_of_s = elapsed / 10;
}
}
if (ppr == NULL)
error (1, 0, "pgp_packet_parser_from_bytes: %s", pgp_error_string (err));
fprintf (stderr, "Parsed %ld packets in %ld seconds, %.2f packets/s.\n",
n, elapsed, (double) n / (double) elapsed);
pgp_packet_parser_result_free (ppr);
munmap (b, st.st_size);
return 0;
}
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