/*
- * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (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 <stdio.h>
#include <stdlib.h>
#include "internal/cryptlib.h"
-# include <openssl/x509.h>
-# include <openssl/evp.h>
-# include <openssl/hmac.h>
-# include "evp_locl.h"
-
-/* set this to print out info about the keygen algorithm */
-/* #define OPENSSL_DEBUG_PKCS5V2 */
-
-# ifdef OPENSSL_DEBUG_PKCS5V2
-static void h__dump(const unsigned char *p, int len);
-# endif
-
-/*
- * This is an implementation of PKCS#5 v2.0 password based encryption key
- * derivation function PBKDF2. SHA1 version verified against test vectors
- * posted by Peter Gutmann <pgut001@cs.auckland.ac.nz> to the PKCS-TNG
- * <pkcs-tng@rsa.com> mailing list.
- */
+#include <openssl/x509.h>
+#include <openssl/evp.h>
+#include <openssl/kdf.h>
+#include <openssl/hmac.h>
+#include <openssl/trace.h>
+#include "internal/evp_int.h"
+#include "evp_locl.h"
int PKCS5_PBKDF2_HMAC(const char *pass, int passlen,
const unsigned char *salt, int saltlen, int iter,
const EVP_MD *digest, int keylen, unsigned char *out)
{
- unsigned char digtmp[EVP_MAX_MD_SIZE], *p, itmp[4];
- int cplen, j, k, tkeylen, mdlen;
- unsigned long i = 1;
- HMAC_CTX *hctx_tpl = NULL, *hctx = NULL;
+ const char *empty = "";
+ int rv = 1;
+ EVP_KDF_CTX *kctx;
- mdlen = EVP_MD_size(digest);
- if (mdlen < 0)
- return 0;
-
- hctx_tpl = HMAC_CTX_new();
- if (hctx_tpl == NULL)
- return 0;
- p = out;
- tkeylen = keylen;
- if (!pass)
+ /* Keep documented behaviour. */
+ if (pass == NULL) {
+ pass = empty;
passlen = 0;
- else if (passlen == -1)
+ } else if (passlen == -1) {
passlen = strlen(pass);
- if (!HMAC_Init_ex(hctx_tpl, pass, passlen, digest, NULL)) {
- HMAC_CTX_free(hctx_tpl);
- return 0;
}
- hctx = HMAC_CTX_new();
- if (hctx == NULL) {
- HMAC_CTX_free(hctx_tpl);
+ if (salt == NULL && saltlen == 0)
+ salt = (unsigned char *)empty;
+
+ kctx = EVP_KDF_CTX_new_id(EVP_KDF_PBKDF2);
+ if (kctx == NULL)
return 0;
- }
- while (tkeylen) {
- if (tkeylen > mdlen)
- cplen = mdlen;
- else
- cplen = tkeylen;
- /*
- * We are unlikely to ever use more than 256 blocks (5120 bits!) but
- * just in case...
- */
- itmp[0] = (unsigned char)((i >> 24) & 0xff);
- itmp[1] = (unsigned char)((i >> 16) & 0xff);
- itmp[2] = (unsigned char)((i >> 8) & 0xff);
- itmp[3] = (unsigned char)(i & 0xff);
- if (!HMAC_CTX_copy(hctx, hctx_tpl)) {
- HMAC_CTX_free(hctx);
- HMAC_CTX_free(hctx_tpl);
- return 0;
- }
- if (!HMAC_Update(hctx, salt, saltlen)
- || !HMAC_Update(hctx, itmp, 4)
- || !HMAC_Final(hctx, digtmp, NULL)) {
- HMAC_CTX_free(hctx);
- HMAC_CTX_free(hctx_tpl);
- return 0;
- }
- HMAC_CTX_reset(hctx);
- memcpy(p, digtmp, cplen);
- for (j = 1; j < iter; j++) {
- if (!HMAC_CTX_copy(hctx, hctx_tpl)) {
- HMAC_CTX_free(hctx);
- HMAC_CTX_free(hctx_tpl);
- return 0;
- }
- if (!HMAC_Update(hctx, digtmp, mdlen)
- || !HMAC_Final(hctx, digtmp, NULL)) {
- HMAC_CTX_free(hctx);
- HMAC_CTX_free(hctx_tpl);
- return 0;
- }
- HMAC_CTX_reset(hctx);
- for (k = 0; k < cplen; k++)
- p[k] ^= digtmp[k];
- }
- tkeylen -= cplen;
- i++;
- p += cplen;
- }
- HMAC_CTX_free(hctx);
- HMAC_CTX_free(hctx_tpl);
-# ifdef OPENSSL_DEBUG_PKCS5V2
- fprintf(stderr, "Password:\n");
- h__dump(pass, passlen);
- fprintf(stderr, "Salt:\n");
- h__dump(salt, saltlen);
- fprintf(stderr, "Iteration count %d\n", iter);
- fprintf(stderr, "Key:\n");
- h__dump(out, keylen);
-# endif
- return 1;
+ if (EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_PASS, pass, (size_t)passlen) != 1
+ || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_SALT,
+ salt, (size_t)saltlen) != 1
+ || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_ITER, iter) != 1
+ || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_MD, digest) != 1
+ || EVP_KDF_derive(kctx, out, keylen) != 1)
+ rv = 0;
+
+ EVP_KDF_CTX_free(kctx);
+
+ OSSL_TRACE_BEGIN(PKCS5V2) {
+ BIO_printf(trc_out, "Password:\n");
+ BIO_hex_string(trc_out,
+ 0, passlen, pass, passlen);
+ BIO_printf(trc_out, "\n");
+ BIO_printf(trc_out, "Salt:\n");
+ BIO_hex_string(trc_out,
+ 0, saltlen, salt, saltlen);
+ BIO_printf(trc_out, "\n");
+ BIO_printf(trc_out, "Iteration count %d\n", iter);
+ BIO_printf(trc_out, "Key:\n");
+ BIO_hex_string(trc_out,
+ 0, keylen, out, keylen);
+ BIO_printf(trc_out, "\n");
+ } OSSL_TRACE_END(PKCS5V2);
+ return rv;
}
int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
keylen, out);
}
-# ifdef DO_TEST
-main()
-{
- unsigned char out[4];
- unsigned char salt[] = { 0x12, 0x34, 0x56, 0x78 };
- PKCS5_PBKDF2_HMAC_SHA1("password", -1, salt, 4, 5, 4, out);
- fprintf(stderr, "Out %02X %02X %02X %02X\n",
- out[0], out[1], out[2], out[3]);
-}
-
-# endif
-
/*
* Now the key derivation function itself. This is a bit evil because it has
* to check the ASN1 parameters are valid: and there are quite a few of
goto err;
}
keylen = EVP_CIPHER_CTX_key_length(ctx);
- OPENSSL_assert(keylen <= sizeof key);
+ OPENSSL_assert(keylen <= sizeof(key));
/* Decode parameter */
PBKDF2PARAM_free(kdf);
return rv;
}
-
-# ifdef OPENSSL_DEBUG_PKCS5V2
-static void h__dump(const unsigned char *p, int len)
-{
- for (; len--; p++)
- fprintf(stderr, "%02X ", *p);
- fprintf(stderr, "\n");
-}
-# endif
projects / openssl.git / blobdiff