mirror of
https://github.com/openssl/openssl.git
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265 lines
7.9 KiB
C
265 lines
7.9 KiB
C
/*
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* Copyright 1999-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/trace.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <openssl/evp.h>
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#include <openssl/kdf.h>
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#include <openssl/core_names.h>
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#include <openssl/proverr.h>
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#include "internal/cryptlib.h"
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#include "internal/numbers.h"
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#include "crypto/evp.h"
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#include "prov/provider_ctx.h"
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#include "prov/providercommon.h"
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#include "prov/implementations.h"
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#include "prov/provider_util.h"
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static OSSL_FUNC_kdf_newctx_fn kdf_pbkdf1_new;
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static OSSL_FUNC_kdf_dupctx_fn kdf_pbkdf1_dup;
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static OSSL_FUNC_kdf_freectx_fn kdf_pbkdf1_free;
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static OSSL_FUNC_kdf_reset_fn kdf_pbkdf1_reset;
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static OSSL_FUNC_kdf_derive_fn kdf_pbkdf1_derive;
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static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_pbkdf1_settable_ctx_params;
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static OSSL_FUNC_kdf_set_ctx_params_fn kdf_pbkdf1_set_ctx_params;
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static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_pbkdf1_gettable_ctx_params;
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static OSSL_FUNC_kdf_get_ctx_params_fn kdf_pbkdf1_get_ctx_params;
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typedef struct {
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void *provctx;
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PROV_DIGEST digest;
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unsigned char *pass;
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size_t pass_len;
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unsigned char *salt;
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size_t salt_len;
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uint64_t iter;
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} KDF_PBKDF1;
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/*
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* PKCS5 PBKDF1 compatible key/IV generation as specified in:
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* https://tools.ietf.org/html/rfc8018#page-10
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*/
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static int kdf_pbkdf1_do_derive(const unsigned char *pass, size_t passlen,
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const unsigned char *salt, size_t saltlen,
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uint64_t iter, const EVP_MD *md_type,
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unsigned char *out, size_t n)
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{
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uint64_t i;
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int mdsize, ret = 0;
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unsigned char md_tmp[EVP_MAX_MD_SIZE];
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EVP_MD_CTX *ctx = NULL;
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ctx = EVP_MD_CTX_new();
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_PROV, ERR_R_EVP_LIB);
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goto err;
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}
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if (!EVP_DigestInit_ex(ctx, md_type, NULL)
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|| !EVP_DigestUpdate(ctx, pass, passlen)
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|| !EVP_DigestUpdate(ctx, salt, saltlen)
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|| !EVP_DigestFinal_ex(ctx, md_tmp, NULL))
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goto err;
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mdsize = EVP_MD_size(md_type);
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if (mdsize < 0)
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goto err;
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for (i = 1; i < iter; i++) {
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if (!EVP_DigestInit_ex(ctx, md_type, NULL))
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goto err;
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if (!EVP_DigestUpdate(ctx, md_tmp, mdsize))
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goto err;
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if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL))
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goto err;
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}
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memcpy(out, md_tmp, n);
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ret = 1;
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err:
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EVP_MD_CTX_free(ctx);
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return ret;
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}
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static void *kdf_pbkdf1_new(void *provctx)
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{
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KDF_PBKDF1 *ctx;
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if (!ossl_prov_is_running())
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return NULL;
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ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx == NULL)
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return NULL;
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ctx->provctx = provctx;
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return ctx;
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}
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static void kdf_pbkdf1_cleanup(KDF_PBKDF1 *ctx)
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{
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ossl_prov_digest_reset(&ctx->digest);
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OPENSSL_free(ctx->salt);
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OPENSSL_clear_free(ctx->pass, ctx->pass_len);
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memset(ctx, 0, sizeof(*ctx));
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}
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static void kdf_pbkdf1_free(void *vctx)
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{
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KDF_PBKDF1 *ctx = (KDF_PBKDF1 *)vctx;
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if (ctx != NULL) {
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kdf_pbkdf1_cleanup(ctx);
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OPENSSL_free(ctx);
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}
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}
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static void kdf_pbkdf1_reset(void *vctx)
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{
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KDF_PBKDF1 *ctx = (KDF_PBKDF1 *)vctx;
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void *provctx = ctx->provctx;
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kdf_pbkdf1_cleanup(ctx);
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ctx->provctx = provctx;
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}
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static void *kdf_pbkdf1_dup(void *vctx)
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{
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const KDF_PBKDF1 *src = (const KDF_PBKDF1 *)vctx;
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KDF_PBKDF1 *dest;
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dest = kdf_pbkdf1_new(src->provctx);
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if (dest != NULL) {
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if (!ossl_prov_memdup(src->salt, src->salt_len,
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&dest->salt, &dest->salt_len)
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|| !ossl_prov_memdup(src->pass, src->pass_len,
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&dest->pass , &dest->pass_len)
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|| !ossl_prov_digest_copy(&dest->digest, &src->digest))
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goto err;
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dest->iter = src->iter;
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}
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return dest;
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err:
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kdf_pbkdf1_free(dest);
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return NULL;
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}
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static int kdf_pbkdf1_set_membuf(unsigned char **buffer, size_t *buflen,
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const OSSL_PARAM *p)
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{
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OPENSSL_clear_free(*buffer, *buflen);
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*buffer = NULL;
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*buflen = 0;
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if (p->data_size == 0) {
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if ((*buffer = OPENSSL_malloc(1)) == NULL)
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return 0;
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} else if (p->data != NULL) {
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if (!OSSL_PARAM_get_octet_string(p, (void **)buffer, 0, buflen))
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return 0;
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}
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return 1;
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}
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static int kdf_pbkdf1_derive(void *vctx, unsigned char *key, size_t keylen,
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const OSSL_PARAM params[])
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{
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KDF_PBKDF1 *ctx = (KDF_PBKDF1 *)vctx;
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const EVP_MD *md;
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if (!ossl_prov_is_running() || !kdf_pbkdf1_set_ctx_params(ctx, params))
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return 0;
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if (ctx->pass == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_PASS);
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return 0;
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}
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if (ctx->salt == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_SALT);
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return 0;
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}
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md = ossl_prov_digest_md(&ctx->digest);
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return kdf_pbkdf1_do_derive(ctx->pass, ctx->pass_len, ctx->salt, ctx->salt_len,
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ctx->iter, md, key, keylen);
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}
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static int kdf_pbkdf1_set_ctx_params(void *vctx, const OSSL_PARAM params[])
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{
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const OSSL_PARAM *p;
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KDF_PBKDF1 *ctx = vctx;
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OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx);
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if (!ossl_prov_digest_load_from_params(&ctx->digest, params, libctx))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PASSWORD)) != NULL)
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if (!kdf_pbkdf1_set_membuf(&ctx->pass, &ctx->pass_len, p))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SALT)) != NULL)
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if (!kdf_pbkdf1_set_membuf(&ctx->salt, &ctx->salt_len, p))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_ITER)) != NULL)
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if (!OSSL_PARAM_get_uint64(p, &ctx->iter))
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return 0;
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return 1;
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}
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static const OSSL_PARAM *kdf_pbkdf1_settable_ctx_params(ossl_unused void *ctx,
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ossl_unused void *p_ctx)
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{
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static const OSSL_PARAM known_settable_ctx_params[] = {
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OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES, NULL, 0),
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OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_DIGEST, NULL, 0),
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OSSL_PARAM_octet_string(OSSL_KDF_PARAM_PASSWORD, NULL, 0),
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OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SALT, NULL, 0),
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OSSL_PARAM_uint64(OSSL_KDF_PARAM_ITER, NULL),
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OSSL_PARAM_END
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};
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return known_settable_ctx_params;
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}
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static int kdf_pbkdf1_get_ctx_params(void *vctx, OSSL_PARAM params[])
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{
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OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL)
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return OSSL_PARAM_set_size_t(p, SIZE_MAX);
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return -2;
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}
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static const OSSL_PARAM *kdf_pbkdf1_gettable_ctx_params(ossl_unused void *ctx,
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ossl_unused void *p_ctx)
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{
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static const OSSL_PARAM known_gettable_ctx_params[] = {
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OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL),
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OSSL_PARAM_END
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};
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return known_gettable_ctx_params;
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}
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const OSSL_DISPATCH ossl_kdf_pbkdf1_functions[] = {
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{ OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_pbkdf1_new },
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{ OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_pbkdf1_dup },
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{ OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_pbkdf1_free },
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{ OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_pbkdf1_reset },
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{ OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_pbkdf1_derive },
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{ OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
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(void(*)(void))kdf_pbkdf1_settable_ctx_params },
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{ OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_pbkdf1_set_ctx_params },
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{ OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
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(void(*)(void))kdf_pbkdf1_gettable_ctx_params },
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{ OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_pbkdf1_get_ctx_params },
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OSSL_DISPATCH_END
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};
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