Upgrade openssl from 1.1.0e to 1.1.1b, with source code. 4.0.78

trunk/3rdparty/openssl-1.1-fit/crypto/cmac/cmac.c

@@ -0,0 +1,226 @@
+/*
+ * Copyright 2010-2018 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 <stdlib.h>
+#include <string.h>
+#include "internal/cryptlib.h"
+#include <openssl/cmac.h>
+#include <openssl/err.h>
+
+struct CMAC_CTX_st {
+    /* Cipher context to use */
+    EVP_CIPHER_CTX *cctx;
+    /* Keys k1 and k2 */
+    unsigned char k1[EVP_MAX_BLOCK_LENGTH];
+    unsigned char k2[EVP_MAX_BLOCK_LENGTH];
+    /* Temporary block */
+    unsigned char tbl[EVP_MAX_BLOCK_LENGTH];
+    /* Last (possibly partial) block */
+    unsigned char last_block[EVP_MAX_BLOCK_LENGTH];
+    /* Number of bytes in last block: -1 means context not initialised */
+    int nlast_block;
+};
+
+/* Make temporary keys K1 and K2 */
+
+static void make_kn(unsigned char *k1, const unsigned char *l, int bl)
+{
+    int i;
+    unsigned char c = l[0], carry = c >> 7, cnext;
+
+    /* Shift block to left, including carry */
+    for (i = 0; i < bl - 1; i++, c = cnext)
+        k1[i] = (c << 1) | ((cnext = l[i + 1]) >> 7);
+
+    /* If MSB set fixup with R */
+    k1[i] = (c << 1) ^ ((0 - carry) & (bl == 16 ? 0x87 : 0x1b));
+}
+
+CMAC_CTX *CMAC_CTX_new(void)
+{
+    CMAC_CTX *ctx;
+
+    if ((ctx = OPENSSL_malloc(sizeof(*ctx))) == NULL) {
+        CRYPTOerr(CRYPTO_F_CMAC_CTX_NEW, ERR_R_MALLOC_FAILURE);
+        return NULL;
+    }
+    ctx->cctx = EVP_CIPHER_CTX_new();
+    if (ctx->cctx == NULL) {
+        OPENSSL_free(ctx);
+        return NULL;
+    }
+    ctx->nlast_block = -1;
+    return ctx;
+}
+
+void CMAC_CTX_cleanup(CMAC_CTX *ctx)
+{
+    EVP_CIPHER_CTX_reset(ctx->cctx);
+    OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH);
+    OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH);
+    OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH);
+    OPENSSL_cleanse(ctx->last_block, EVP_MAX_BLOCK_LENGTH);
+    ctx->nlast_block = -1;
+}
+
+EVP_CIPHER_CTX *CMAC_CTX_get0_cipher_ctx(CMAC_CTX *ctx)
+{
+    return ctx->cctx;
+}
+
+void CMAC_CTX_free(CMAC_CTX *ctx)
+{
+    if (!ctx)
+        return;
+    CMAC_CTX_cleanup(ctx);
+    EVP_CIPHER_CTX_free(ctx->cctx);
+    OPENSSL_free(ctx);
+}
+
+int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in)
+{
+    int bl;
+    if (in->nlast_block == -1)
+        return 0;
+    if (!EVP_CIPHER_CTX_copy(out->cctx, in->cctx))
+        return 0;
+    bl = EVP_CIPHER_CTX_block_size(in->cctx);
+    memcpy(out->k1, in->k1, bl);
+    memcpy(out->k2, in->k2, bl);
+    memcpy(out->tbl, in->tbl, bl);
+    memcpy(out->last_block, in->last_block, bl);
+    out->nlast_block = in->nlast_block;
+    return 1;
+}
+
+int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
+              const EVP_CIPHER *cipher, ENGINE *impl)
+{
+    static const unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH] = { 0 };
+    /* All zeros means restart */
+    if (!key && !cipher && !impl && keylen == 0) {
+        /* Not initialised */
+        if (ctx->nlast_block == -1)
+            return 0;
+        if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, zero_iv))
+            return 0;
+        memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(ctx->cctx));
+        ctx->nlast_block = 0;
+        return 1;
+    }
+    /* Initialise context */
+    if (cipher && !EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL))
+        return 0;
+    /* Non-NULL key means initialisation complete */
+    if (key) {
+        int bl;
+        if (!EVP_CIPHER_CTX_cipher(ctx->cctx))
+            return 0;
+        if (!EVP_CIPHER_CTX_set_key_length(ctx->cctx, keylen))
+            return 0;
+        if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, key, zero_iv))
+            return 0;
+        bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
+        if (!EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl))
+            return 0;
+        make_kn(ctx->k1, ctx->tbl, bl);
+        make_kn(ctx->k2, ctx->k1, bl);
+        OPENSSL_cleanse(ctx->tbl, bl);
+        /* Reset context again ready for first data block */
+        if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, zero_iv))
+            return 0;
+        /* Zero tbl so resume works */
+        memset(ctx->tbl, 0, bl);
+        ctx->nlast_block = 0;
+    }
+    return 1;
+}
+
+int CMAC_Update(CMAC_CTX *ctx, const void *in, size_t dlen)
+{
+    const unsigned char *data = in;
+    size_t bl;
+    if (ctx->nlast_block == -1)
+        return 0;
+    if (dlen == 0)
+        return 1;
+    bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
+    /* Copy into partial block if we need to */
+    if (ctx->nlast_block > 0) {
+        size_t nleft;
+        nleft = bl - ctx->nlast_block;
+        if (dlen < nleft)
+            nleft = dlen;
+        memcpy(ctx->last_block + ctx->nlast_block, data, nleft);
+        dlen -= nleft;
+        ctx->nlast_block += nleft;
+        /* If no more to process return */
+        if (dlen == 0)
+            return 1;
+        data += nleft;
+        /* Else not final block so encrypt it */
+        if (!EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl))
+            return 0;
+    }
+    /* Encrypt all but one of the complete blocks left */
+    while (dlen > bl) {
+        if (!EVP_Cipher(ctx->cctx, ctx->tbl, data, bl))
+            return 0;
+        dlen -= bl;
+        data += bl;
+    }
+    /* Copy any data left to last block buffer */
+    memcpy(ctx->last_block, data, dlen);
+    ctx->nlast_block = dlen;
+    return 1;
+
+}
+
+int CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen)
+{
+    int i, bl, lb;
+    if (ctx->nlast_block == -1)
+        return 0;
+    bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
+    *poutlen = (size_t)bl;
+    if (!out)
+        return 1;
+    lb = ctx->nlast_block;
+    /* Is last block complete? */
+    if (lb == bl) {
+        for (i = 0; i < bl; i++)
+            out[i] = ctx->last_block[i] ^ ctx->k1[i];
+    } else {
+        ctx->last_block[lb] = 0x80;
+        if (bl - lb > 1)
+            memset(ctx->last_block + lb + 1, 0, bl - lb - 1);
+        for (i = 0; i < bl; i++)
+            out[i] = ctx->last_block[i] ^ ctx->k2[i];
+    }
+    if (!EVP_Cipher(ctx->cctx, out, out, bl)) {
+        OPENSSL_cleanse(out, bl);
+        return 0;
+    }
+    return 1;
+}
+
+int CMAC_resume(CMAC_CTX *ctx)
+{
+    if (ctx->nlast_block == -1)
+        return 0;
+    /*
+     * The buffer "tbl" contains the last fully encrypted block which is the
+     * last IV (or all zeroes if no last encrypted block). The last block has
+     * not been modified since CMAC_final(). So reinitialising using the last
+     * decrypted block will allow CMAC to continue after calling
+     * CMAC_Final().
+     */
+    return EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, ctx->tbl);
+}