320 lines
9.3 KiB
C
320 lines
9.3 KiB
C
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/*
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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_pkcs12_new;
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static OSSL_FUNC_kdf_dupctx_fn kdf_pkcs12_dup;
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static OSSL_FUNC_kdf_freectx_fn kdf_pkcs12_free;
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static OSSL_FUNC_kdf_reset_fn kdf_pkcs12_reset;
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static OSSL_FUNC_kdf_derive_fn kdf_pkcs12_derive;
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static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_pkcs12_settable_ctx_params;
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static OSSL_FUNC_kdf_set_ctx_params_fn kdf_pkcs12_set_ctx_params;
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static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_pkcs12_gettable_ctx_params;
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static OSSL_FUNC_kdf_get_ctx_params_fn kdf_pkcs12_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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int id;
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} KDF_PKCS12;
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/* PKCS12 compatible key/IV generation */
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static int pkcs12kdf_derive(const unsigned char *pass, size_t passlen,
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const unsigned char *salt, size_t saltlen,
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int id, 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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unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL;
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size_t Slen, Plen, Ilen;
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size_t i, j, k, u, v;
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uint64_t iter_cnt;
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int ret = 0, ui, vi;
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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 end;
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}
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vi = EVP_MD_get_block_size(md_type);
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ui = EVP_MD_get_size(md_type);
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if (ui <= 0 || vi <= 0) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_SIZE);
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goto end;
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}
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u = (size_t)ui;
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v = (size_t)vi;
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D = OPENSSL_malloc(v);
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Ai = OPENSSL_malloc(u);
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B = OPENSSL_malloc(v + 1);
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Slen = v * ((saltlen + v - 1) / v);
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if (passlen != 0)
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Plen = v * ((passlen + v - 1) / v);
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else
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Plen = 0;
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Ilen = Slen + Plen;
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I = OPENSSL_malloc(Ilen);
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if (D == NULL || Ai == NULL || B == NULL || I == NULL)
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goto end;
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for (i = 0; i < v; i++)
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D[i] = id;
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p = I;
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for (i = 0; i < Slen; i++)
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*p++ = salt[i % saltlen];
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for (i = 0; i < Plen; i++)
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*p++ = pass[i % passlen];
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for (;;) {
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if (!EVP_DigestInit_ex(ctx, md_type, NULL)
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|| !EVP_DigestUpdate(ctx, D, v)
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|| !EVP_DigestUpdate(ctx, I, Ilen)
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|| !EVP_DigestFinal_ex(ctx, Ai, NULL))
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goto end;
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for (iter_cnt = 1; iter_cnt < iter; iter_cnt++) {
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if (!EVP_DigestInit_ex(ctx, md_type, NULL)
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|| !EVP_DigestUpdate(ctx, Ai, u)
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|| !EVP_DigestFinal_ex(ctx, Ai, NULL))
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goto end;
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}
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memcpy(out, Ai, n < u ? n : u);
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if (u >= n) {
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ret = 1;
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break;
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}
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n -= u;
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out += u;
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for (j = 0; j < v; j++)
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B[j] = Ai[j % u];
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for (j = 0; j < Ilen; j += v) {
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unsigned char *Ij = I + j;
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uint16_t c = 1;
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/* Work out Ij = Ij + B + 1 */
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for (k = v; k > 0;) {
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k--;
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c += Ij[k] + B[k];
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Ij[k] = (unsigned char)c;
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c >>= 8;
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}
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}
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}
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end:
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OPENSSL_free(Ai);
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OPENSSL_free(B);
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OPENSSL_free(D);
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OPENSSL_free(I);
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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_pkcs12_new(void *provctx)
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{
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KDF_PKCS12 *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_pkcs12_cleanup(KDF_PKCS12 *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_pkcs12_free(void *vctx)
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{
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KDF_PKCS12 *ctx = (KDF_PKCS12 *)vctx;
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if (ctx != NULL) {
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kdf_pkcs12_cleanup(ctx);
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OPENSSL_free(ctx);
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}
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}
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static void kdf_pkcs12_reset(void *vctx)
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{
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KDF_PKCS12 *ctx = (KDF_PKCS12 *)vctx;
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void *provctx = ctx->provctx;
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kdf_pkcs12_cleanup(ctx);
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ctx->provctx = provctx;
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}
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static void *kdf_pkcs12_dup(void *vctx)
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{
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const KDF_PKCS12 *src = (const KDF_PKCS12 *)vctx;
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KDF_PKCS12 *dest;
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dest = kdf_pkcs12_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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dest->id = src->id;
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}
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return dest;
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err:
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kdf_pkcs12_free(dest);
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return NULL;
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}
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static int pkcs12kdf_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_pkcs12_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_PKCS12 *ctx = (KDF_PKCS12 *)vctx;
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const EVP_MD *md;
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if (!ossl_prov_is_running() || !kdf_pkcs12_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 pkcs12kdf_derive(ctx->pass, ctx->pass_len, ctx->salt, ctx->salt_len,
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ctx->id, ctx->iter, md, key, keylen);
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}
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static int kdf_pkcs12_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_PKCS12 *ctx = vctx;
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OSSL_LIB_CTX *provctx = PROV_LIBCTX_OF(ctx->provctx);
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if (params == NULL)
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return 1;
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if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx))
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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 (!pkcs12kdf_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 (!pkcs12kdf_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_PKCS12_ID)) != NULL)
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if (!OSSL_PARAM_get_int(p, &ctx->id))
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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_pkcs12_settable_ctx_params(
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ossl_unused void *ctx, ossl_unused void *provctx)
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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_int(OSSL_KDF_PARAM_PKCS12_ID, 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_pkcs12_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_pkcs12_gettable_ctx_params(
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ossl_unused void *ctx, ossl_unused void *provctx)
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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_pkcs12_functions[] = {
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{ OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_pkcs12_new },
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{ OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_pkcs12_dup },
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{ OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_pkcs12_free },
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{ OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_pkcs12_reset },
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{ OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_pkcs12_derive },
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{ OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
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(void(*)(void))kdf_pkcs12_settable_ctx_params },
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{ OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_pkcs12_set_ctx_params },
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{ OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
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(void(*)(void))kdf_pkcs12_gettable_ctx_params },
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{ OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_pkcs12_get_ctx_params },
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OSSL_DISPATCH_END
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};
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