Openssl 1.1.0h
This commit is contained in:
Hakase
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/*
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* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/pkcs12.h>
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#include <openssl/bn.h>
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/* Uncomment out this line to get debugging info about key generation */
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/*
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* #define OPENSSL_DEBUG_KEYGEN
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*/
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#ifdef OPENSSL_DEBUG_KEYGEN
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# include <openssl/bio.h>
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extern BIO *bio_err;
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void h__dump(unsigned char *p, int len);
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#endif
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/* PKCS12 compatible key/IV generation */
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#ifndef min
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# define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
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int saltlen, int id, int iter, int n,
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unsigned char *out, const EVP_MD *md_type)
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{
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int ret;
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unsigned char *unipass;
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int uniplen;
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if (!pass) {
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unipass = NULL;
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uniplen = 0;
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} else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) {
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PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
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id, iter, n, out, md_type);
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if (ret <= 0)
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return 0;
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OPENSSL_clear_free(unipass, uniplen);
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return ret;
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}
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int PKCS12_key_gen_utf8(const char *pass, int passlen, unsigned char *salt,
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int saltlen, int id, int iter, int n,
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unsigned char *out, const EVP_MD *md_type)
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{
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int ret;
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unsigned char *unipass;
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int uniplen;
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if (!pass) {
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unipass = NULL;
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uniplen = 0;
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} else if (!OPENSSL_utf82uni(pass, passlen, &unipass, &uniplen)) {
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PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UTF8, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
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id, iter, n, out, md_type);
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if (ret <= 0)
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return 0;
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OPENSSL_clear_free(unipass, uniplen);
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return ret;
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}
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int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,
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int saltlen, int id, int iter, int n,
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unsigned char *out, const EVP_MD *md_type)
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{
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unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL;
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int Slen, Plen, Ilen, Ijlen;
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int i, j, u, v;
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int ret = 0;
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BIGNUM *Ij = NULL, *Bpl1 = NULL; /* These hold Ij and B + 1 */
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EVP_MD_CTX *ctx = NULL;
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#ifdef OPENSSL_DEBUG_KEYGEN
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unsigned char *tmpout = out;
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int tmpn = n;
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#endif
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ctx = EVP_MD_CTX_new();
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if (ctx == NULL)
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goto err;
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#ifdef OPENSSL_DEBUG_KEYGEN
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fprintf(stderr, "KEYGEN DEBUG\n");
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fprintf(stderr, "ID %d, ITER %d\n", id, iter);
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fprintf(stderr, "Password (length %d):\n", passlen);
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h__dump(pass, passlen);
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fprintf(stderr, "Salt (length %d):\n", saltlen);
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h__dump(salt, saltlen);
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#endif
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v = EVP_MD_block_size(md_type);
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u = EVP_MD_size(md_type);
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if (u < 0 || v <= 0)
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goto err;
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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)
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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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Ij = BN_new();
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Bpl1 = BN_new();
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if (D == NULL || Ai == NULL || B == NULL || I == NULL || Ij == NULL
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|| Bpl1 == NULL)
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goto err;
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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 err;
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for (j = 1; j < iter; j++) {
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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 err;
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}
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memcpy(out, Ai, min(n, u));
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if (u >= n) {
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#ifdef OPENSSL_DEBUG_KEYGEN
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fprintf(stderr, "Output KEY (length %d)\n", tmpn);
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h__dump(tmpout, tmpn);
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#endif
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ret = 1;
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goto end;
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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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/* Work out B + 1 first then can use B as tmp space */
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if (!BN_bin2bn(B, v, Bpl1))
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goto err;
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if (!BN_add_word(Bpl1, 1))
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goto err;
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for (j = 0; j < Ilen; j += v) {
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if (!BN_bin2bn(I + j, v, Ij))
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goto err;
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if (!BN_add(Ij, Ij, Bpl1))
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goto err;
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if (!BN_bn2bin(Ij, B))
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goto err;
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Ijlen = BN_num_bytes(Ij);
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/* If more than 2^(v*8) - 1 cut off MSB */
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if (Ijlen > v) {
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if (!BN_bn2bin(Ij, B))
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goto err;
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memcpy(I + j, B + 1, v);
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#ifndef PKCS12_BROKEN_KEYGEN
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/* If less than v bytes pad with zeroes */
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} else if (Ijlen < v) {
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memset(I + j, 0, v - Ijlen);
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if (!BN_bn2bin(Ij, I + j + v - Ijlen))
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goto err;
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#endif
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} else if (!BN_bn2bin(Ij, I + j))
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goto err;
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}
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}
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err:
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PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_MALLOC_FAILURE);
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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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BN_free(Ij);
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BN_free(Bpl1);
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EVP_MD_CTX_free(ctx);
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return ret;
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}
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#ifdef OPENSSL_DEBUG_KEYGEN
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void h__dump(unsigned char *p, int len)
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{
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for (; len--; p++)
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fprintf(stderr, "%02X", *p);
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fprintf(stderr, "\n");
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}
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#endif
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