[libvirt PATCH 1/9] util: add virRandomToken API
A random token is simply a string of random bytes formatted in
hexidecimal.
Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/virrandom.c | 18 ++++++++++++++++++
src/util/virrandom.h | 1 +
3 files changed, 20 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 9f761c2c00..418688a4fa 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -3081,6 +3081,7 @@ virRandomBits;
virRandomBytes;
virRandomGenerateWWN;
virRandomInt;
+virRandomToken;
# util/virresctrl.h
diff --git a/src/util/virrandom.c b/src/util/virrandom.c
index 3ae1297e6b..c3f3aa1fa6 100644
--- a/src/util/virrandom.c
+++ b/src/util/virrandom.c
@@ -161,3 +161,21 @@ virRandomGenerateWWN(char **wwn,
(unsigned long long)virRandomBits(36));
return 0;
}
+
+char *virRandomToken(size_t len)
+{
+ g_autofree unsigned char *data = g_new0(unsigned char, len);
+ g_autofree char *token = g_new0(char, (len * 2) + 1);
+ static const char hex[] = "0123456789abcdef";
+ size_t i;
+
+ if (virRandomBytes(data, len) < 0)
+ return NULL;
+
+ for (i = 0; i < len; i++) {
+ token[(i*2)] = hex[data[i] & 0xf];
+ token[(i*2)+1] = hex[(data[i] >> 4) & 0xf];
+ }
+
+ return g_steal_pointer(&token);
+}
diff --git a/src/util/virrandom.h b/src/util/virrandom.h
index 297721f912..aac684ada9 100644
--- a/src/util/virrandom.h
+++ b/src/util/virrandom.h
@@ -26,3 +26,4 @@ uint32_t virRandomInt(uint32_t max);
int virRandomBytes(unsigned char *buf, size_t buflen)
ATTRIBUTE_NONNULL(1) G_GNUC_WARN_UNUSED_RESULT G_GNUC_NO_INLINE;
int virRandomGenerateWWN(char **wwn, const char *virt_type) G_GNUC_NO_INLINE;
+char *virRandomToken(size_t len);
--
2.31.1