lws-genhash.h

/*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation:
 *  version 2.1 of the License.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *  MA  02110-1301  USA
 *
 * included from libwebsockets.h
 */
 
 
enum lws_genhash_types {
        LWS_GENHASH_TYPE_UNKNOWN,
        LWS_GENHASH_TYPE_MD5,
        LWS_GENHASH_TYPE_SHA1,
        LWS_GENHASH_TYPE_SHA256,
        LWS_GENHASH_TYPE_SHA384,
        LWS_GENHASH_TYPE_SHA512,
};
 
enum lws_genhmac_types {
        LWS_GENHMAC_TYPE_UNKNOWN,
        LWS_GENHMAC_TYPE_SHA256,
        LWS_GENHMAC_TYPE_SHA384,
        LWS_GENHMAC_TYPE_SHA512,
};
 
#define LWS_GENHASH_LARGEST 64
 
struct lws_genhash_ctx {
        uint8_t type;
#if defined(LWS_WITH_MBEDTLS)
        union {
                mbedtls_md5_context md5;
                mbedtls_sha1_context sha1;
                mbedtls_sha256_context sha256;
                mbedtls_sha512_context sha512; /* 384 also uses this */
                const mbedtls_md_info_t *hmac;
        } u;
#else
        const EVP_MD *evp_type;
        EVP_MD_CTX *mdctx;
#endif
};
 
struct lws_genhmac_ctx {
        uint8_t type;
#if defined(LWS_WITH_MBEDTLS)
        const mbedtls_md_info_t *hmac;
        mbedtls_md_context_t ctx;
#else
        const EVP_MD *evp_type;
#if defined(LWS_HAVE_HMAC_CTX_new)
        HMAC_CTX *ctx;
#else
        HMAC_CTX ctx;
#endif
#endif
};
 
LWS_VISIBLE LWS_EXTERN size_t LWS_WARN_UNUSED_RESULT
lws_genhash_size(enum lws_genhash_types type);
 
LWS_VISIBLE LWS_EXTERN size_t LWS_WARN_UNUSED_RESULT
lws_genhmac_size(enum lws_genhmac_types type);
 
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
lws_genhash_init(struct lws_genhash_ctx *ctx, enum lws_genhash_types type);
 
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
lws_genhash_update(struct lws_genhash_ctx *ctx, const void *in, size_t len);
 
LWS_VISIBLE LWS_EXTERN int
lws_genhash_destroy(struct lws_genhash_ctx *ctx, void *result);
 
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
lws_genhmac_init(struct lws_genhmac_ctx *ctx, enum lws_genhmac_types type,
                 const uint8_t *key, size_t key_len);
 
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
lws_genhmac_update(struct lws_genhmac_ctx *ctx, const void *in, size_t len);
 
LWS_VISIBLE LWS_EXTERN int
lws_genhmac_destroy(struct lws_genhmac_ctx *ctx, void *result);