--- /dev/null
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2016.
+ */
+/* ====================================================================
+ * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/kdf.h>
+#include <openssl/evp.h>
+#include "internal/evp_int.h"
+
+static int tls1_prf_alg(const EVP_MD *md,
+ const unsigned char *sec, size_t slen,
+ const unsigned char *seed, size_t seed_len,
+ unsigned char *out, size_t olen);
+
+#define TLS1_PRF_MAXBUF 1024
+
+/* TLS KDF pkey context structure */
+
+typedef struct {
+ /* Digest to use for PRF */
+ const EVP_MD *md;
+ /* Secret value to use for PRF */
+ unsigned char *sec;
+ size_t seclen;
+ /* Buffer of concatenated seed data */
+ unsigned char seed[TLS1_PRF_MAXBUF];
+ size_t seedlen;
+} TLS1_PRF_PKEY_CTX;
+
+static int pkey_tls1_prf_init(EVP_PKEY_CTX *ctx)
+{
+ TLS1_PRF_PKEY_CTX *kctx;
+
+ kctx = OPENSSL_zalloc(sizeof(*kctx));
+ if (kctx == NULL)
+ return 0;
+ ctx->data = kctx;
+
+ return 1;
+}
+
+static void pkey_tls1_prf_cleanup(EVP_PKEY_CTX *ctx)
+{
+ TLS1_PRF_PKEY_CTX *kctx = ctx->data;
+ OPENSSL_clear_free(kctx->sec, kctx->seclen);
+ OPENSSL_cleanse(kctx->seed, kctx->seedlen);
+ OPENSSL_free(kctx);
+}
+
+static int pkey_tls1_prf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+{
+ TLS1_PRF_PKEY_CTX *kctx = ctx->data;
+ switch (type) {
+ case EVP_PKEY_CTRL_TLS_MD:
+ kctx->md = p2;
+ return 1;
+
+ case EVP_PKEY_CTRL_TLS_SECRET:
+ if (p1 < 0)
+ return 0;
+ if (kctx->sec != NULL)
+ OPENSSL_clear_free(kctx->sec, kctx->seclen);
+ OPENSSL_cleanse(kctx->seed, kctx->seedlen);
+ kctx->seedlen = 0;
+ kctx->sec = OPENSSL_memdup(p2, p1);
+ if (kctx->sec == NULL)
+ return 0;
+ kctx->seclen = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_TLS_SEED:
+ if (p1 == 0 || p2 == NULL)
+ return 1;
+ if (p1 < 0 || p1 > (int)(TLS1_PRF_MAXBUF - kctx->seedlen))
+ return 0;
+ memcpy(kctx->seed + kctx->seedlen, p2, p1);
+ kctx->seedlen += p1;
+ return 1;
+
+ default:
+ return -2;
+
+ }
+}
+
+static int pkey_tls1_prf_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
+ size_t *keylen)
+{
+ TLS1_PRF_PKEY_CTX *kctx = ctx->data;
+ if (kctx->md == NULL || kctx->sec == NULL || kctx->seed == NULL)
+ return 0;
+ return tls1_prf_alg(kctx->md, kctx->sec, kctx->seclen,
+ kctx->seed, kctx->seedlen,
+ key, *keylen);
+}
+
+const EVP_PKEY_METHOD tls1_prf_pkey_meth = {
+ EVP_PKEY_TLS1_PRF,
+ 0,
+ pkey_tls1_prf_init,
+ 0,
+ pkey_tls1_prf_cleanup,
+
+ 0, 0,
+ 0, 0,
+
+ 0,
+ 0,
+
+ 0,
+ 0,
+
+ 0, 0,
+
+ 0, 0, 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0,
+ pkey_tls1_prf_derive,
+ pkey_tls1_prf_ctrl,
+ 0
+};
+
+static int tls1_prf_P_hash(const EVP_MD *md,
+ const unsigned char *sec, size_t sec_len,
+ const unsigned char *seed, size_t seed_len,
+ unsigned char *out, size_t olen)
+{
+ int chunk;
+ EVP_MD_CTX *ctx = NULL, *ctx_tmp = NULL, *ctx_init = NULL;
+ EVP_PKEY *mac_key = NULL;
+ unsigned char A1[EVP_MAX_MD_SIZE];
+ size_t A1_len;
+ int ret = 0;
+
+ chunk = EVP_MD_size(md);
+ OPENSSL_assert(chunk >= 0);
+
+ ctx = EVP_MD_CTX_new();
+ ctx_tmp = EVP_MD_CTX_new();
+ ctx_init = EVP_MD_CTX_new();
+ if (ctx == NULL || ctx_tmp == NULL || ctx_init == NULL)
+ goto err;
+ EVP_MD_CTX_set_flags(ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+ mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
+ if (mac_key == NULL)
+ goto err;
+ if (!EVP_DigestSignInit(ctx_init, NULL, md, NULL, mac_key))
+ goto err;
+ if (!EVP_MD_CTX_copy_ex(ctx, ctx_init))
+ goto err;
+ if (seed != NULL && !EVP_DigestSignUpdate(ctx, seed, seed_len))
+ goto err;
+ if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
+ goto err;
+
+ for (;;) {
+ /* Reinit mac contexts */
+ if (!EVP_MD_CTX_copy_ex(ctx, ctx_init))
+ goto err;
+ if (!EVP_DigestSignUpdate(ctx, A1, A1_len))
+ goto err;
+ if (olen > (size_t)chunk && !EVP_MD_CTX_copy_ex(ctx_tmp, ctx))
+ goto err;
+ if (seed && !EVP_DigestSignUpdate(ctx, seed, seed_len))
+ goto err;
+
+ if (olen > (size_t)chunk) {
+ size_t mac_len;
+ if (!EVP_DigestSignFinal(ctx, out, &mac_len))
+ goto err;
+ out += mac_len;
+ olen -= mac_len;
+ /* calc the next A1 value */
+ if (!EVP_DigestSignFinal(ctx_tmp, A1, &A1_len))
+ goto err;
+ } else { /* last one */
+
+ if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
+ goto err;
+ memcpy(out, A1, olen);
+ break;
+ }
+ }
+ ret = 1;
+ err:
+ EVP_PKEY_free(mac_key);
+ EVP_MD_CTX_free(ctx);
+ EVP_MD_CTX_free(ctx_tmp);
+ EVP_MD_CTX_free(ctx_init);
+ OPENSSL_cleanse(A1, sizeof(A1));
+ return ret;
+}
+
+static int tls1_prf_alg(const EVP_MD *md,
+ const unsigned char *sec, size_t slen,
+ const unsigned char *seed, size_t seed_len,
+ unsigned char *out, size_t olen)
+{
+
+ if (EVP_MD_type(md) == NID_md5_sha1) {
+ size_t i;
+ unsigned char *tmp;
+ if (!tls1_prf_P_hash(EVP_md5(), sec, slen/2 + (slen & 1),
+ seed, seed_len, out, olen))
+ return 0;
+
+ tmp = OPENSSL_malloc(olen);
+ if (tmp == NULL)
+ return 0;
+ if (!tls1_prf_P_hash(EVP_sha1(), sec + slen/2, slen/2 + (slen & 1),
+ seed, seed_len, tmp, olen)) {
+ OPENSSL_clear_free(tmp, olen);
+ return 0;
+ }
+ for (i = 0; i < olen; i++)
+ out[i] ^= tmp[i];
+ OPENSSL_clear_free(tmp, olen);
+ return 1;
+ }
+ if (!tls1_prf_P_hash(md, sec, slen, seed, seed_len, out, olen))
+ return 0;
+
+ return 1;
+}
--- /dev/null
+/* kdf.h */
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 2016 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#ifndef HEADER_KDF_H
+# define HEADER_KDF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+# define EVP_PKEY_CTRL_TLS_MD (EVP_PKEY_ALG_CTRL)
+# define EVP_PKEY_CTRL_TLS_SECRET (EVP_PKEY_ALG_CTRL + 1)
+# define EVP_PKEY_CTRL_TLS_SEED (EVP_PKEY_ALG_CTRL + 2)
+
+# define EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) \
+ EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_TLS_MD, 0, (void *)md)
+
+# define EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, seclen) \
+ EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_TLS_SECRET, seclen, (void *)sec)
+
+# define EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed, seedlen) \
+ EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_TLS_SEED, seedlen, (void *)seed)
+
+#ifdef __cplusplus
+}
+#endif
+#endif
projects / openssl.git / commitdiff