initial/final commitHEADmaster

1 files changed, 198 insertions, 0 deletions

diff --git a/openssl-1.1.0h/crypto/modes/cfb128.c b/openssl-1.1.0h/crypto/modes/cfb128.c
new file mode 100644
index 0000000..e439567
--- /dev/null
+++ b/openssl-1.1.0h/crypto/modes/cfb128.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2008-2016 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 <openssl/crypto.h>
+#include "modes_lcl.h"
+#include <string.h>
+
+/*
+ * The input and output encrypted as though 128bit cfb mode is being used.
+ * The extra state information to record how much of the 128bit block we have
+ * used is contained in *num;
+ */
+void CRYPTO_cfb128_encrypt(const unsigned char *in, unsigned char *out,
+                           size_t len, const void *key,
+                           unsigned char ivec[16], int *num,
+                           int enc, block128_f block)
+{
+    unsigned int n;
+    size_t l = 0;
+
+    n = *num;
+
+    if (enc) {
+#if !defined(OPENSSL_SMALL_FOOTPRINT)
+        if (16 % sizeof(size_t) == 0) { /* always true actually */
+            do {
+                while (n && len) {
+                    *(out++) = ivec[n] ^= *(in++);
+                    --len;
+                    n = (n + 1) % 16;
+                }
+# if defined(STRICT_ALIGNMENT)
+                if (((size_t)in | (size_t)out | (size_t)ivec) %
+                    sizeof(size_t) != 0)
+                    break;
+# endif
+                while (len >= 16) {
+                    (*block) (ivec, ivec, key);
+                    for (; n < 16; n += sizeof(size_t)) {
+                        *(size_t *)(out + n) =
+                            *(size_t *)(ivec + n) ^= *(size_t *)(in + n);
+                    }
+                    len -= 16;
+                    out += 16;
+                    in += 16;
+                    n = 0;
+                }
+                if (len) {
+                    (*block) (ivec, ivec, key);
+                    while (len--) {
+                        out[n] = ivec[n] ^= in[n];
+                        ++n;
+                    }
+                }
+                *num = n;
+                return;
+            } while (0);
+        }
+        /* the rest would be commonly eliminated by x86* compiler */
+#endif
+        while (l < len) {
+            if (n == 0) {
+                (*block) (ivec, ivec, key);
+            }
+            out[l] = ivec[n] ^= in[l];
+            ++l;
+            n = (n + 1) % 16;
+        }
+        *num = n;
+    } else {
+#if !defined(OPENSSL_SMALL_FOOTPRINT)
+        if (16 % sizeof(size_t) == 0) { /* always true actually */
+            do {
+                while (n && len) {
+                    unsigned char c;
+                    *(out++) = ivec[n] ^ (c = *(in++));
+                    ivec[n] = c;
+                    --len;
+                    n = (n + 1) % 16;
+                }
+# if defined(STRICT_ALIGNMENT)
+                if (((size_t)in | (size_t)out | (size_t)ivec) %
+                    sizeof(size_t) != 0)
+                    break;
+# endif
+                while (len >= 16) {
+                    (*block) (ivec, ivec, key);
+                    for (; n < 16; n += sizeof(size_t)) {
+                        size_t t = *(size_t *)(in + n);
+                        *(size_t *)(out + n) = *(size_t *)(ivec + n) ^ t;
+                        *(size_t *)(ivec + n) = t;
+                    }
+                    len -= 16;
+                    out += 16;
+                    in += 16;
+                    n = 0;
+                }
+                if (len) {
+                    (*block) (ivec, ivec, key);
+                    while (len--) {
+                        unsigned char c;
+                        out[n] = ivec[n] ^ (c = in[n]);
+                        ivec[n] = c;
+                        ++n;
+                    }
+                }
+                *num = n;
+                return;
+            } while (0);
+        }
+        /* the rest would be commonly eliminated by x86* compiler */
+#endif
+        while (l < len) {
+            unsigned char c;
+            if (n == 0) {
+                (*block) (ivec, ivec, key);
+            }
+            out[l] = ivec[n] ^ (c = in[l]);
+            ivec[n] = c;
+            ++l;
+            n = (n + 1) % 16;
+        }
+        *num = n;
+    }
+}
+
+/*
+ * This expects a single block of size nbits for both in and out. Note that
+ * it corrupts any extra bits in the last byte of out
+ */
+static void cfbr_encrypt_block(const unsigned char *in, unsigned char *out,
+                               int nbits, const void *key,
+                               unsigned char ivec[16], int enc,
+                               block128_f block)
+{
+    int n, rem, num;
+    unsigned char ovec[16 * 2 + 1]; /* +1 because we dereference (but don't
+                                     * use) one byte off the end */
+
+    if (nbits <= 0 || nbits > 128)
+        return;
+
+    /* fill in the first half of the new IV with the current IV */
+    memcpy(ovec, ivec, 16);
+    /* construct the new IV */
+    (*block) (ivec, ivec, key);
+    num = (nbits + 7) / 8;
+    if (enc)                    /* encrypt the input */
+        for (n = 0; n < num; ++n)
+            out[n] = (ovec[16 + n] = in[n] ^ ivec[n]);
+    else                        /* decrypt the input */
+        for (n = 0; n < num; ++n)
+            out[n] = (ovec[16 + n] = in[n]) ^ ivec[n];
+    /* shift ovec left... */
+    rem = nbits % 8;
+    num = nbits / 8;
+    if (rem == 0)
+        memcpy(ivec, ovec + num, 16);
+    else
+        for (n = 0; n < 16; ++n)
+            ivec[n] = ovec[n + num] << rem | ovec[n + num + 1] >> (8 - rem);
+
+    /* it is not necessary to cleanse ovec, since the IV is not secret */
+}
+
+/* N.B. This expects the input to be packed, MS bit first */
+void CRYPTO_cfb128_1_encrypt(const unsigned char *in, unsigned char *out,
+                             size_t bits, const void *key,
+                             unsigned char ivec[16], int *num,
+                             int enc, block128_f block)
+{
+    size_t n;
+    unsigned char c[1], d[1];
+
+    for (n = 0; n < bits; ++n) {
+        c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
+        cfbr_encrypt_block(c, d, 1, key, ivec, enc, block);
+        out[n / 8] = (out[n / 8] & ~(1 << (unsigned int)(7 - n % 8))) |
+            ((d[0] & 0x80) >> (unsigned int)(n % 8));
+    }
+}
+
+void CRYPTO_cfb128_8_encrypt(const unsigned char *in, unsigned char *out,
+                             size_t length, const void *key,
+                             unsigned char ivec[16], int *num,
+                             int enc, block128_f block)
+{
+    size_t n;
+
+    for (n = 0; n < length; ++n)
+        cfbr_encrypt_block(&in[n], &out[n], 8, key, ivec, enc, block);
+}