Overview
| Comment: | Some platforms do not define LONG_LONG_MAX and we really don't need that many bytes of random data anyway, so use a smaller value |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
423575338a4efde9f3b0fefd8a11ad90 |
| User & Date: | rkeene on 2018-07-10 19:20:52.397 |
| Other Links: | manifest | tags |
Context
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2018-07-10
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| 19:27 | Added dependencies check-in: 84a49387e9 user: rkeene tags: trunk | |
| 19:20 | Some platforms do not define LONG_LONG_MAX and we really don't need that many bytes of random data anyway, so use a smaller value check-in: 423575338a user: rkeene tags: trunk | |
| 00:33 | Better formatting of Downloads wiki page check-in: 7e81c41b70 user: rkeene tags: trunk | |
Changes
Modified randombytes.c
from [9959d0caf1]
to [2ad22d5176].
1 2 3 4 5 | #include <limits.h> #include <tcl.h> #include "randombytes.h" | | | > > > > > > > > | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
#include <limits.h>
#include <tcl.h>
#include "randombytes.h"
long getrandom_impl(void *buf, unsigned int buflen);
void randombytes(unsigned char *buffer, unsigned long long length) {
long gr_ret;
int errorCount = 0;
/*
* Ensure that the number of bytes requested can fit within
* the types we pass to other calls.
*
* The interface required by randombytes() used by TweetNaCl
* does not give us any way to handle errors. However,
* no buffer should exceed these amounts.
*/
if (length > UINT_MAX || length > LONG_MAX) {
Tcl_Panic("Buffer length is too large");
}
while (length > 0) {
gr_ret = getrandom_impl(buffer, length);
if (gr_ret < 0) {
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36 37 38 39 40 41 42 | } #if defined(HAVE_GETRANDOM) # ifdef HAVE_SYS_RANDOM_H # include <sys/random.h> # endif | | | | | | | 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 |
}
#if defined(HAVE_GETRANDOM)
# ifdef HAVE_SYS_RANDOM_H
# include <sys/random.h>
# endif
long getrandom_impl(void *buf, unsigned int buflen) {
ssize_t gr_ret;
gr_ret = getrandom(buf, buflen, 0);
return(gr_ret);
}
#elif defined(HAVE_GETENTROPY)
#include <unistd.h>
long getrandom_impl(void *buf, unsigned int buflen) {
int ge_ret;
if (buflen > 255) {
buflen = 255;
}
ge_ret = getentropy(buf, buflen);
if (ge_ret != 0) {
return(-1);
}
return(buflen);
}
#elif defined(HAVE_CRYPTGENRANDOM) && 0
#include <tcl.h>
long getrandom_impl(void *buf, unsigned int buflen) {
Tcl_Panic("Incomplete CryptGenRandom");
}
#else
# ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
# endif
# ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
# endif
# ifdef HAVE_FCNTL_H
# include <fcntl.h>
# endif
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
long getrandom_impl(void *buf, unsigned int buflen) {
ssize_t read_ret;
long retval;
int fd = -1;
fd = open("/dev/urandom", O_RDONLY);
if (fd < 0) {
return(-1);
}
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