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Diffstat (limited to 'Cryptlib/OpenSSL/crypto/kdf/hkdf.c')
-rw-r--r--Cryptlib/OpenSSL/crypto/kdf/hkdf.c293
1 files changed, 0 insertions, 293 deletions
diff --git a/Cryptlib/OpenSSL/crypto/kdf/hkdf.c b/Cryptlib/OpenSSL/crypto/kdf/hkdf.c
deleted file mode 100644
index 00b95b5a..00000000
--- a/Cryptlib/OpenSSL/crypto/kdf/hkdf.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the OpenSSL license (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 <stdlib.h>
-#include <string.h>
-#include <openssl/hmac.h>
-#include <openssl/kdf.h>
-#include <openssl/evp.h>
-#include "internal/cryptlib.h"
-#include "internal/evp_int.h"
-
-#define HKDF_MAXBUF 1024
-
-static unsigned char *HKDF(const EVP_MD *evp_md,
- const unsigned char *salt, size_t salt_len,
- const unsigned char *key, size_t key_len,
- const unsigned char *info, size_t info_len,
- unsigned char *okm, size_t okm_len);
-
-static unsigned char *HKDF_Extract(const EVP_MD *evp_md,
- const unsigned char *salt, size_t salt_len,
- const unsigned char *key, size_t key_len,
- unsigned char *prk, size_t *prk_len);
-
-static unsigned char *HKDF_Expand(const EVP_MD *evp_md,
- const unsigned char *prk, size_t prk_len,
- const unsigned char *info, size_t info_len,
- unsigned char *okm, size_t okm_len);
-
-typedef struct {
- const EVP_MD *md;
- unsigned char *salt;
- size_t salt_len;
- unsigned char *key;
- size_t key_len;
- unsigned char info[HKDF_MAXBUF];
- size_t info_len;
-} HKDF_PKEY_CTX;
-
-static int pkey_hkdf_init(EVP_PKEY_CTX *ctx)
-{
- HKDF_PKEY_CTX *kctx;
-
- kctx = OPENSSL_zalloc(sizeof(*kctx));
- if (kctx == NULL)
- return 0;
-
- ctx->data = kctx;
-
- return 1;
-}
-
-static void pkey_hkdf_cleanup(EVP_PKEY_CTX *ctx)
-{
- HKDF_PKEY_CTX *kctx = ctx->data;
- OPENSSL_clear_free(kctx->salt, kctx->salt_len);
- OPENSSL_clear_free(kctx->key, kctx->key_len);
- OPENSSL_cleanse(kctx->info, kctx->info_len);
- OPENSSL_free(kctx);
-}
-
-static int pkey_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
-{
- HKDF_PKEY_CTX *kctx = ctx->data;
-
- switch (type) {
- case EVP_PKEY_CTRL_HKDF_MD:
- if (p2 == NULL)
- return 0;
-
- kctx->md = p2;
- return 1;
-
- case EVP_PKEY_CTRL_HKDF_SALT:
- if (p1 == 0 || p2 == NULL)
- return 1;
-
- if (p1 < 0)
- return 0;
-
- if (kctx->salt != NULL)
- OPENSSL_clear_free(kctx->salt, kctx->salt_len);
-
- kctx->salt = OPENSSL_memdup(p2, p1);
- if (kctx->salt == NULL)
- return 0;
-
- kctx->salt_len = p1;
- return 1;
-
- case EVP_PKEY_CTRL_HKDF_KEY:
- if (p1 < 0)
- return 0;
-
- if (kctx->key != NULL)
- OPENSSL_clear_free(kctx->key, kctx->key_len);
-
- kctx->key = OPENSSL_memdup(p2, p1);
- if (kctx->key == NULL)
- return 0;
-
- kctx->key_len = p1;
- return 1;
-
- case EVP_PKEY_CTRL_HKDF_INFO:
- if (p1 == 0 || p2 == NULL)
- return 1;
-
- if (p1 < 0 || p1 > (int)(HKDF_MAXBUF - kctx->info_len))
- return 0;
-
- memcpy(kctx->info + kctx->info_len, p2, p1);
- kctx->info_len += p1;
- return 1;
-
- default:
- return -2;
-
- }
-}
-
-static int pkey_hkdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
- const char *value)
-{
- if (strcmp(type, "md") == 0)
- return EVP_PKEY_CTX_set_hkdf_md(ctx, EVP_get_digestbyname(value));
-
- if (strcmp(type, "salt") == 0)
- return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_HKDF_SALT, value);
-
- if (strcmp(type, "hexsalt") == 0)
- return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_HKDF_SALT, value);
-
- if (strcmp(type, "key") == 0)
- return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_HKDF_KEY, value);
-
- if (strcmp(type, "hexkey") == 0)
- return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_HKDF_KEY, value);
-
- if (strcmp(type, "info") == 0)
- return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_HKDF_INFO, value);
-
- if (strcmp(type, "hexinfo") == 0)
- return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_HKDF_INFO, value);
-
- return -2;
-}
-
-static int pkey_hkdf_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
- size_t *keylen)
-{
- HKDF_PKEY_CTX *kctx = ctx->data;
-
- if (kctx->md == NULL || kctx->key == NULL)
- return 0;
-
- if (HKDF(kctx->md, kctx->salt, kctx->salt_len, kctx->key, kctx->key_len,
- kctx->info, kctx->info_len, key, *keylen) == NULL)
- {
- return 0;
- }
-
- return 1;
-}
-
-const EVP_PKEY_METHOD hkdf_pkey_meth = {
- EVP_PKEY_HKDF,
- 0,
- pkey_hkdf_init,
- 0,
- pkey_hkdf_cleanup,
-
- 0, 0,
- 0, 0,
-
- 0,
- 0,
-
- 0,
- 0,
-
- 0, 0,
-
- 0, 0, 0, 0,
-
- 0, 0,
-
- 0, 0,
-
- 0,
- pkey_hkdf_derive,
- pkey_hkdf_ctrl,
- pkey_hkdf_ctrl_str
-};
-
-static unsigned char *HKDF(const EVP_MD *evp_md,
- const unsigned char *salt, size_t salt_len,
- const unsigned char *key, size_t key_len,
- const unsigned char *info, size_t info_len,
- unsigned char *okm, size_t okm_len)
-{
- unsigned char prk[EVP_MAX_MD_SIZE];
- size_t prk_len;
-
- if (!HKDF_Extract(evp_md, salt, salt_len, key, key_len, prk, &prk_len))
- return NULL;
-
- return HKDF_Expand(evp_md, prk, prk_len, info, info_len, okm, okm_len);
-}
-
-static unsigned char *HKDF_Extract(const EVP_MD *evp_md,
- const unsigned char *salt, size_t salt_len,
- const unsigned char *key, size_t key_len,
- unsigned char *prk, size_t *prk_len)
-{
- unsigned int tmp_len;
-
- if (!HMAC(evp_md, salt, salt_len, key, key_len, prk, &tmp_len))
- return NULL;
-
- *prk_len = tmp_len;
- return prk;
-}
-
-static unsigned char *HKDF_Expand(const EVP_MD *evp_md,
- const unsigned char *prk, size_t prk_len,
- const unsigned char *info, size_t info_len,
- unsigned char *okm, size_t okm_len)
-{
- HMAC_CTX *hmac;
-
- unsigned int i;
-
- unsigned char prev[EVP_MAX_MD_SIZE];
-
- size_t done_len = 0, dig_len = EVP_MD_size(evp_md);
-
- size_t n = okm_len / dig_len;
- if (okm_len % dig_len)
- n++;
-
- if (n > 255)
- return NULL;
-
- if ((hmac = HMAC_CTX_new()) == NULL)
- return NULL;
-
- if (!HMAC_Init_ex(hmac, prk, prk_len, evp_md, NULL))
- goto err;
-
- for (i = 1; i <= n; i++) {
- size_t copy_len;
- const unsigned char ctr = i;
-
- if (i > 1) {
- if (!HMAC_Init_ex(hmac, NULL, 0, NULL, NULL))
- goto err;
-
- if (!HMAC_Update(hmac, prev, dig_len))
- goto err;
- }
-
- if (!HMAC_Update(hmac, info, info_len))
- goto err;
-
- if (!HMAC_Update(hmac, &ctr, 1))
- goto err;
-
- if (!HMAC_Final(hmac, prev, NULL))
- goto err;
-
- copy_len = (done_len + dig_len > okm_len) ?
- okm_len - done_len :
- dig_len;
-
- memcpy(okm + done_len, prev, copy_len);
-
- done_len += copy_len;
- }
-
- HMAC_CTX_free(hmac);
- return okm;
-
- err:
- HMAC_CTX_free(hmac);
- return NULL;
-}
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