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/*
a custom hash must have a 512bit digest and implement:
struct ed25519_hash_context;
void ed25519_hash_init(ed25519_hash_context *ctx);
void ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen);
void ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash);
void ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen);
*/
#include "crypto_digest.h"
typedef struct ed25519_hash_context {
crypto_digest_t *ctx;
} ed25519_hash_context;
static void
ed25519_hash_init(ed25519_hash_context *ctx)
{
ctx->ctx = crypto_digest512_new(DIGEST_SHA512);
}
static void
ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen)
{
crypto_digest_add_bytes(ctx->ctx, (const char *)in, inlen);
}
static void
ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash)
{
crypto_digest_get_digest(ctx->ctx, (char *)hash, DIGEST512_LEN);
crypto_digest_free(ctx->ctx);
ctx->ctx = NULL;
}
static void
ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen)
{
crypto_digest512((char *)hash, (const char *)in, inlen,
DIGEST_SHA512);
}
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