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cmac+hash: add support for Nettle 4.0

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Support for truncated digests was removed in Nettle 4.0. The digest
functions no longer accept the output length. Provide a full-length
buffer and copy the requested length of the digest, same as with the
other crypto providers.
This commit is contained in:
Miroslav Lichvar
2026-03-02 11:55:30 +01:00
parent d622b222a9
commit fee12ec914
3 changed files with 31 additions and 4 deletions
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13
hash_nettle.c
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@@ -30,6 +30,7 @@
#include "sysincl.h"
#include <nettle/nettle-meta.h>
#include <nettle/version.h>
#include "hash.h"
#include "memory.h"
@@ -91,6 +92,7 @@ int
HSH_Hash(int id, const void *in1, int in1_len, const void *in2, int in2_len,
unsigned char *out, int out_len)
{
unsigned char buf[MAX_HASH_LENGTH];
const struct nettle_hash *hash;
void *context;
@@ -103,11 +105,20 @@ HSH_Hash(int id, const void *in1, int in1_len, const void *in2, int in2_len,
if (out_len > hash->digest_size)
out_len = hash->digest_size;
if (hash->digest_size > sizeof (buf))
return 0;
hash->init(context);
hash->update(context, in1_len, in1);
if (in2)
hash->update(context, in2_len, in2);
hash->digest(context, out_len, out);
hash->digest(context,
#if NETTLE_VERSION_MAJOR < 4
hash->digest_size,
#endif
buf);
memcpy(out, buf, out_len);
return out_len;
}