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util: add virRandomToken API
A random token is simply a string of random bytes formatted in hexidecimal. Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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@ -3081,6 +3081,7 @@ virRandomBits;
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virRandomBytes;
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virRandomGenerateWWN;
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virRandomInt;
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virRandomToken;
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# util/virresctrl.h
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@ -161,3 +161,21 @@ virRandomGenerateWWN(char **wwn,
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(unsigned long long)virRandomBits(36));
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return 0;
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}
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char *virRandomToken(size_t len)
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{
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g_autofree unsigned char *data = g_new0(unsigned char, len);
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g_autofree char *token = g_new0(char, (len * 2) + 1);
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static const char hex[] = "0123456789abcdef";
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size_t i;
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if (virRandomBytes(data, len) < 0)
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return NULL;
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for (i = 0; i < len; i++) {
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token[(i*2)] = hex[data[i] & 0xf];
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token[(i*2)+1] = hex[(data[i] >> 4) & 0xf];
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}
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return g_steal_pointer(&token);
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}
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@ -26,3 +26,4 @@ uint32_t virRandomInt(uint32_t max);
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int virRandomBytes(unsigned char *buf, size_t buflen)
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ATTRIBUTE_NONNULL(1) G_GNUC_WARN_UNUSED_RESULT G_GNUC_NO_INLINE;
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int virRandomGenerateWWN(char **wwn, const char *virt_type) G_GNUC_NO_INLINE;
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char *virRandomToken(size_t len);
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