diff options
Diffstat (limited to 'providers/implementations/digests/null_prov.c')
| -rw-r--r-- | providers/implementations/digests/null_prov.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/providers/implementations/digests/null_prov.c b/providers/implementations/digests/null_prov.c new file mode 100644 index 000000000000..b220a1966ff7 --- /dev/null +++ b/providers/implementations/digests/null_prov.c @@ -0,0 +1,52 @@ +/* + * Copyright 2021 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <openssl/crypto.h> +#include "prov/digestcommon.h" +#include "prov/implementations.h" + +typedef struct { + unsigned char nothing; +} NULLMD_CTX; + +static int null_init(NULLMD_CTX *ctx) +{ + return 1; +} + +static int null_update(NULLMD_CTX *ctx, const void *data, size_t datalen) +{ + return 1; +} + +static int null_final(unsigned char *md, NULLMD_CTX *ctx) +{ + return 1; +} + +/* + * We must override the PROV_FUNC_DIGEST_FINAL as dgstsize == 0 + * and that would cause compilation warnings with the default implementation. + */ +#undef PROV_FUNC_DIGEST_FINAL +#define PROV_FUNC_DIGEST_FINAL(name, dgstsize, fin) \ +static OSSL_FUNC_digest_final_fn name##_internal_final; \ +static int name##_internal_final(void *ctx, unsigned char *out, size_t *outl, \ + size_t outsz) \ +{ \ + if (ossl_prov_is_running() && fin(out, ctx)) { \ + *outl = dgstsize; \ + return 1; \ + } \ + return 0; \ +} + +IMPLEMENT_digest_functions(nullmd, NULLMD_CTX, + 0, 0, 0, + null_init, null_update, null_final) |