Problem - Kevin Tafuro

if (errno = = EINTR) continue;
perror("spc_rand could not read from /dev/urandom");
exit(-1);
}
where += r;
nbytes -= r;
}
return buf;
}
unsigned char *spc_keygen(unsigned char *buf, size_t nbytes) {
ssize_t r;
unsigned char *where = buf;
if (spc_devrand_fd = = -1 && spc_devrand_fd_noblock = = -1 && spc_devurand_fd = = -1)
spc_rand_init( );
while (nbytes) {
if ((r = read(spc_devrand_fd_noblock, where, nbytes)) = = -1) {
if (errno = = EINTR) continue;
if (errno = = EAGAIN) break;
perror("spc_rand could not read from /dev/random");
exit(-1);
}
where += r;
nbytes -= r;
}
spc_rand(where, nbytes);
return buf;
}
unsigned char *spc_entropy(unsigned char *buf, size_t nbytes) {
ssize_t r;
unsigned char *where = buf;
if (spc_devrand_fd = = -1 && spc_devrand_fd_noblock = = -1 && spc_devurand_fd = = -1)
spc_rand_init( );
while (nbytes) {
if ((r = read(spc_devrand_fd, (void *)where, nbytes)) = = -1) {
if (errno = = EINTR) continue;
perror("spc_rand could not read from /dev/random");
exit(-1);
}
where += r;
nbytes -= r;
}
return buf;
}
See Also
Recipes 11.2, 11.5, 11.8, 11.19, 11.20, 11.22, 11.23
Using the Standard Unix Randomness Infrastructure | 579
This is the Title of the Book, eMatter Edition
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