62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
#include "rsa_common.h"
|
|
|
|
void fail(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fputs("\n", stderr);
|
|
fflush(stderr);
|
|
exit(1);
|
|
}
|
|
|
|
void write_file(const char *fname, const void *buf, const unsigned long len)
|
|
{
|
|
FILE *io = fopen(fname, "wb");
|
|
if (!io) {
|
|
fail("Can't open '%s' for writing: %s", fname, strerror(errno));
|
|
}
|
|
|
|
if (fwrite(buf, len, 1, io) != 1) {
|
|
fail("Couldn't write '%s': %s", fname, strerror(errno));
|
|
}
|
|
|
|
if (fclose(io) != 0) {
|
|
fail("Couldn't flush '%s' to disk: %s", fname, strerror(errno));
|
|
}
|
|
}
|
|
|
|
void read_file(const char *fname, void *buf, unsigned long *len)
|
|
{
|
|
ssize_t br;
|
|
FILE *io = fopen(fname, "rb");
|
|
if (!io) {
|
|
fail("Can't open '%s' for reading: %s", fname, strerror(errno));
|
|
}
|
|
|
|
br = fread(buf, 1, *len, io);
|
|
if (ferror(io)) {
|
|
fail("Couldn't read '%s': %s", fname, strerror(errno));
|
|
} else if (!feof(io)) {
|
|
fail("Buffer too small to read '%s'", fname);
|
|
}
|
|
fclose(io);
|
|
|
|
*len = (unsigned long) br;
|
|
}
|
|
|
|
void read_rsakey(rsa_key *key, const char *fname)
|
|
{
|
|
unsigned char buf[4096];
|
|
unsigned long len = sizeof (buf);
|
|
int rc;
|
|
|
|
read_file(fname, buf, &len);
|
|
|
|
if ((rc = rsa_import(buf, len, key)) != CRYPT_OK) {
|
|
fail("rsa_import for '%s' failed: %s", fname, error_to_string(rc));
|
|
}
|
|
}
|
|
|