Add a verbatim copy of tls1_prf.c from OpenSSL 1.1.1

From the last public commit b372b1f76450acdfed1e2301a39810146e28b02c
of the OpenSSL_1_1_1-stable branch

SHA256 (kdf/tls1_prf.c) = a519d3ff721d4ec59befac8586e24624fa87d9d8f6479327f7af58d652b6e4e5

Will be beat (a little bit) into shape in tree before linking it to the
build.

ok jsing

diff --git a/lib/libcrypto/kdf/tls1_prf.c b/lib/libcrypto/kdf/tls1_prf.c
new file mode 100644 (file)
index 0000000..e9ca8e1
--- /dev/null
+++ b/lib/libcrypto/kdf/tls1_prf.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 "internal/cryptlib.h"
+#include <openssl/kdf.h>
+#include <openssl/evp.h>
+#include "crypto/evp.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;
+
+    if ((kctx = OPENSSL_zalloc(sizeof(*kctx))) == NULL) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_INIT, ERR_R_MALLOC_FAILURE);
+        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_ctrl_str(EVP_PKEY_CTX *ctx,
+                                  const char *type, const char *value)
+{
+    if (value == NULL) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_VALUE_MISSING);
+        return 0;
+    }
+    if (strcmp(type, "md") == 0) {
+        TLS1_PRF_PKEY_CTX *kctx = ctx->data;
+
+        const EVP_MD *md = EVP_get_digestbyname(value);
+        if (md == NULL) {
+            KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_INVALID_DIGEST);
+            return 0;
+        }
+        kctx->md = md;
+        return 1;
+    }
+    if (strcmp(type, "secret") == 0)
+        return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_TLS_SECRET, value);
+    if (strcmp(type, "hexsecret") == 0)
+        return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_TLS_SECRET, value);
+    if (strcmp(type, "seed") == 0)
+        return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_TLS_SEED, value);
+    if (strcmp(type, "hexseed") == 0)
+        return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_TLS_SEED, value);
+
+    KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_UNKNOWN_PARAMETER_TYPE);
+    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) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_MESSAGE_DIGEST);
+        return 0;
+    }
+    if (kctx->sec == NULL) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_SECRET);
+        return 0;
+    }
+    if (kctx->seedlen == 0) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_SEED);
+        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,
+    pkey_tls1_prf_ctrl_str
+};
+
+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);
+    if (!ossl_assert(chunk > 0))
+        goto err;
+
+    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_raw_private_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;
+
+        if ((tmp = OPENSSL_malloc(olen)) == NULL) {
+            KDFerr(KDF_F_TLS1_PRF_ALG, ERR_R_MALLOC_FAILURE);
+            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;
+}