mirror of
https://github.com/OpenIntelWireless/itlwm.git
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193 lines
4.7 KiB
C
193 lines
4.7 KiB
C
/* $OpenBSD: hmac.c,v 1.4 2016/09/19 18:09:40 tedu Exp $ */
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/*-
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* Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This code implements the HMAC algorithm described in RFC 2104 using
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* the MD5, SHA1 and SHA-256 hash functions.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <crypto/md5.h>
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#include <crypto/sha1.h>
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#include <crypto/sha2.h>
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#include <crypto/hmac.h>
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void
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HMAC_MD5_Init(HMAC_MD5_CTX *ctx, const u_int8_t *key, u_int key_len)
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{
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u_int8_t k_ipad[MD5_BLOCK_LENGTH];
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int i;
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if (key_len > MD5_BLOCK_LENGTH) {
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MD5Init(&ctx->ctx);
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MD5Update(&ctx->ctx, key, key_len);
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MD5Final(ctx->key, &ctx->ctx);
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ctx->key_len = MD5_DIGEST_LENGTH;
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} else {
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bcopy(key, ctx->key, key_len);
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ctx->key_len = key_len;
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}
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bzero(k_ipad, MD5_BLOCK_LENGTH);
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memcpy(k_ipad, ctx->key, ctx->key_len);
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for (i = 0; i < MD5_BLOCK_LENGTH; i++)
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k_ipad[i] ^= 0x36;
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MD5Init(&ctx->ctx);
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MD5Update(&ctx->ctx, k_ipad, MD5_BLOCK_LENGTH);
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memset(k_ipad, 0, sizeof k_ipad);
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}
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void
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HMAC_MD5_Update(HMAC_MD5_CTX *ctx, const u_int8_t *data, u_int len)
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{
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MD5Update(&ctx->ctx, data, len);
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}
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void
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HMAC_MD5_Final(u_int8_t digest[MD5_DIGEST_LENGTH], HMAC_MD5_CTX *ctx)
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{
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u_int8_t k_opad[MD5_BLOCK_LENGTH];
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int i;
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MD5Final(digest, &ctx->ctx);
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bzero(k_opad, MD5_BLOCK_LENGTH);
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memcpy(k_opad, ctx->key, ctx->key_len);
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for (i = 0; i < MD5_BLOCK_LENGTH; i++)
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k_opad[i] ^= 0x5c;
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MD5Init(&ctx->ctx);
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MD5Update(&ctx->ctx, k_opad, MD5_BLOCK_LENGTH);
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MD5Update(&ctx->ctx, digest, MD5_DIGEST_LENGTH);
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MD5Final(digest, &ctx->ctx);
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memset(k_opad, 0, sizeof k_opad);
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}
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void
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HMAC_SHA1_Init(HMAC_SHA1_CTX *ctx, const u_int8_t *key, u_int key_len)
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{
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u_int8_t k_ipad[SHA1_BLOCK_LENGTH];
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int i;
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if (key_len > SHA1_BLOCK_LENGTH) {
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SHA1Init(&ctx->ctx);
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SHA1Update(&ctx->ctx, key, key_len);
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SHA1Final(ctx->key, &ctx->ctx);
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ctx->key_len = SHA1_DIGEST_LENGTH;
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} else {
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bcopy(key, ctx->key, key_len);
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ctx->key_len = key_len;
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}
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bzero(k_ipad, SHA1_BLOCK_LENGTH);
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memcpy(k_ipad, ctx->key, ctx->key_len);
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for (i = 0; i < SHA1_BLOCK_LENGTH; i++)
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k_ipad[i] ^= 0x36;
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SHA1Init(&ctx->ctx);
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SHA1Update(&ctx->ctx, k_ipad, SHA1_BLOCK_LENGTH);
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memset(k_ipad, 0, sizeof k_ipad);
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}
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void
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HMAC_SHA1_Update(HMAC_SHA1_CTX *ctx, const u_int8_t *data, u_int len)
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{
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SHA1Update(&ctx->ctx, data, len);
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}
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void
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HMAC_SHA1_Final(u_int8_t digest[SHA1_DIGEST_LENGTH], HMAC_SHA1_CTX *ctx)
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{
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u_int8_t k_opad[SHA1_BLOCK_LENGTH];
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int i;
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SHA1Final(digest, &ctx->ctx);
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bzero(k_opad, SHA1_BLOCK_LENGTH);
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memcpy(k_opad, ctx->key, ctx->key_len);
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for (i = 0; i < SHA1_BLOCK_LENGTH; i++)
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k_opad[i] ^= 0x5c;
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SHA1Init(&ctx->ctx);
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SHA1Update(&ctx->ctx, k_opad, SHA1_BLOCK_LENGTH);
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SHA1Update(&ctx->ctx, digest, SHA1_DIGEST_LENGTH);
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SHA1Final(digest, &ctx->ctx);
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memset(k_opad, 0, sizeof k_opad);
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}
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void
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HMAC_SHA256_Init(HMAC_SHA256_CTX *ctx, const u_int8_t *key, u_int key_len)
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{
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u_int8_t k_ipad[SHA256_BLOCK_LENGTH];
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int i;
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if (key_len > SHA256_BLOCK_LENGTH) {
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SHA256Init(&ctx->ctx);
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SHA256Update(&ctx->ctx, key, key_len);
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SHA256Final(ctx->key, &ctx->ctx);
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ctx->key_len = SHA256_DIGEST_LENGTH;
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} else {
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bcopy(key, ctx->key, key_len);
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ctx->key_len = key_len;
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}
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bzero(k_ipad, SHA256_BLOCK_LENGTH);
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memcpy(k_ipad, ctx->key, ctx->key_len);
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for (i = 0; i < SHA256_BLOCK_LENGTH; i++)
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k_ipad[i] ^= 0x36;
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SHA256Init(&ctx->ctx);
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SHA256Update(&ctx->ctx, k_ipad, SHA256_BLOCK_LENGTH);
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memset(k_ipad, 0, sizeof k_ipad);
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}
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void
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HMAC_SHA256_Update(HMAC_SHA256_CTX *ctx, const u_int8_t *data, u_int len)
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{
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SHA256Update(&ctx->ctx, data, len);
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}
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void
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HMAC_SHA256_Final(u_int8_t digest[SHA256_DIGEST_LENGTH], HMAC_SHA256_CTX *ctx)
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{
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u_int8_t k_opad[SHA256_BLOCK_LENGTH];
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int i;
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SHA256Final(digest, &ctx->ctx);
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bzero(k_opad, SHA256_BLOCK_LENGTH);
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memcpy(k_opad, ctx->key, ctx->key_len);
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for (i = 0; i < SHA256_BLOCK_LENGTH; i++)
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k_opad[i] ^= 0x5c;
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SHA256Init(&ctx->ctx);
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SHA256Update(&ctx->ctx, k_opad, SHA256_BLOCK_LENGTH);
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SHA256Update(&ctx->ctx, digest, SHA256_DIGEST_LENGTH);
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SHA256Final(digest, &ctx->ctx);
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memset(k_opad, 0, sizeof k_opad);
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}
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