diff options
Diffstat (limited to 'src/include/openssl/hkdf.h')
-rw-r--r-- | src/include/openssl/hkdf.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/include/openssl/hkdf.h b/src/include/openssl/hkdf.h new file mode 100644 index 0000000..4091b84 --- /dev/null +++ b/src/include/openssl/hkdf.h @@ -0,0 +1,45 @@ +/* Copyright (c) 2014, Google Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + +#ifndef OPENSSL_HEADER_HKDF_H +#define OPENSSL_HEADER_HKDF_H + +#include <openssl/base.h> + +#ifdef __cplusplus +extern "C" { +#endif + + +/* Computes HKDF (as specified by RFC 5869) of initial keying material |secret| + * with |salt| and |info| using |digest|, and outputs |out_len| bytes to + * |out_key|. It returns one on success and zero on error. + * + * HKDF is an Extract-and-Expand algorithm. It does not do any key stretching, + * and as such, is not suited to be used alone to generate a key from a + * password. */ +OPENSSL_EXPORT int HKDF(uint8_t *out_key, size_t out_len, const EVP_MD *digest, + const uint8_t *secret, size_t secret_len, + const uint8_t *salt, size_t salt_len, + const uint8_t *info, size_t info_len); + + +#if defined(__cplusplus) +} /* extern C */ +#endif + +#define HKDF_F_HKDF 100 +#define HKDF_R_OUTPUT_TOO_LARGE 100 + +#endif /* OPENSSL_HEADER_HKDF_H */ |