/usr/include/dovecot/hmac.h is in dovecot-dev 1:2.2.9-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 27 28 29 30 31 32 33 34 35 | #ifndef HMAC_H
#define HMAC_H
#include "hash-method.h"
#include "sha1.h"
#define HMAC_MAX_CONTEXT_SIZE 256
struct hmac_context_priv {
char ctx[HMAC_MAX_CONTEXT_SIZE];
char ctxo[HMAC_MAX_CONTEXT_SIZE];
const struct hash_method *hash;
};
struct hmac_context {
union {
struct hmac_context_priv priv;
uint64_t padding_requirement;
} u;
};
void hmac_init(struct hmac_context *ctx, const unsigned char *key,
size_t key_len, const struct hash_method *meth);
void hmac_final(struct hmac_context *ctx, unsigned char *digest);
static inline void
hmac_update(struct hmac_context *_ctx, const void *data, size_t size)
{
struct hmac_context_priv *ctx = &_ctx->u.priv;
ctx->hash->loop(ctx->ctx, data, size);
}
#endif
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