Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 287 insertions, 0 deletions

diff --git a/third_party/libsrtp/src/crypto/math/datatypes.c b/third_party/libsrtp/src/crypto/math/datatypes.c
new file mode 100644
index 0000000000..0eb9d919b5
--- /dev/null
+++ b/third_party/libsrtp/src/crypto/math/datatypes.c
@@ -0,0 +1,287 @@
+/*
+ * datatypes.c
+ *
+ * data types for finite fields and functions for input, output, and
+ * manipulation
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+/*
+ *
+ * Copyright (c) 2001-2017 Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ *   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.
+ *
+ *   Neither the name of the Cisco Systems, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS 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
+ * COPYRIGHT HOLDERS OR 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef OPENSSL
+#include <openssl/crypto.h>
+#endif
+
+#include "datatypes.h"
+
+/*
+ * bit_string is a buffer that is used to hold output strings, e.g.
+ * for printing.
+ */
+
+/* the value MAX_PRINT_STRING_LEN is defined in datatypes.h */
+/* include space for null terminator */
+static char bit_string[MAX_PRINT_STRING_LEN + 1];
+
+uint8_t srtp_nibble_to_hex_char(uint8_t nibble)
+{
+    char buf[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
+                     '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+    return buf[nibble & 0xF];
+}
+
+char *srtp_octet_string_hex_string(const void *s, int length)
+{
+    const uint8_t *str = (const uint8_t *)s;
+    int i;
+
+    /* double length, since one octet takes two hex characters */
+    length *= 2;
+
+    /* truncate string if it would be too long */
+    if (length > MAX_PRINT_STRING_LEN)
+        length = MAX_PRINT_STRING_LEN - 2;
+
+    for (i = 0; i < length; i += 2) {
+        bit_string[i] = srtp_nibble_to_hex_char(*str >> 4);
+        bit_string[i + 1] = srtp_nibble_to_hex_char(*str++ & 0xF);
+    }
+    bit_string[i] = 0; /* null terminate string */
+    return bit_string;
+}
+
+char *v128_hex_string(v128_t *x)
+{
+    int i, j;
+
+    for (i = j = 0; i < 16; i++) {
+        bit_string[j++] = srtp_nibble_to_hex_char(x->v8[i] >> 4);
+        bit_string[j++] = srtp_nibble_to_hex_char(x->v8[i] & 0xF);
+    }
+
+    bit_string[j] = 0; /* null terminate string */
+    return bit_string;
+}
+
+char *v128_bit_string(v128_t *x)
+{
+    int j, i;
+    uint32_t mask;
+
+    for (j = i = 0; j < 4; j++) {
+        for (mask = 0x80000000; mask > 0; mask >>= 1) {
+            if (x->v32[j] & mask)
+                bit_string[i] = '1';
+            else
+                bit_string[i] = '0';
+            ++i;
+        }
+    }
+    bit_string[128] = 0; /* null terminate string */
+
+    return bit_string;
+}
+
+void v128_copy_octet_string(v128_t *x, const uint8_t s[16])
+{
+#ifdef ALIGNMENT_32BIT_REQUIRED
+    if ((((uint32_t)&s[0]) & 0x3) != 0)
+#endif
+    {
+        x->v8[0] = s[0];
+        x->v8[1] = s[1];
+        x->v8[2] = s[2];
+        x->v8[3] = s[3];
+        x->v8[4] = s[4];
+        x->v8[5] = s[5];
+        x->v8[6] = s[6];
+        x->v8[7] = s[7];
+        x->v8[8] = s[8];
+        x->v8[9] = s[9];
+        x->v8[10] = s[10];
+        x->v8[11] = s[11];
+        x->v8[12] = s[12];
+        x->v8[13] = s[13];
+        x->v8[14] = s[14];
+        x->v8[15] = s[15];
+    }
+#ifdef ALIGNMENT_32BIT_REQUIRED
+    else {
+        v128_t *v = (v128_t *)&s[0];
+
+        v128_copy(x, v);
+    }
+#endif
+}
+
+void v128_left_shift(v128_t *x, int shift)
+{
+    int i;
+    const int base_index = shift >> 5;
+    const int bit_index = shift & 31;
+
+    if (shift > 127) {
+        v128_set_to_zero(x);
+        return;
+    }
+
+    if (bit_index == 0) {
+        for (i = 0; i < 4 - base_index; i++)
+            x->v32[i] = x->v32[i + base_index];
+    } else {
+        for (i = 0; i < 4 - base_index - 1; i++)
+            x->v32[i] = (x->v32[i + base_index] >> bit_index) ^
+                        (x->v32[i + base_index + 1] << (32 - bit_index));
+        x->v32[4 - base_index - 1] = x->v32[4 - 1] >> bit_index;
+    }
+
+    /* now wrap up the final portion */
+    for (i = 4 - base_index; i < 4; i++)
+        x->v32[i] = 0;
+}
+
+/* functions manipulating bitvector_t */
+
+int bitvector_alloc(bitvector_t *v, unsigned long length)
+{
+    unsigned long l;
+
+    /* Round length up to a multiple of bits_per_word */
+    length =
+        (length + bits_per_word - 1) & ~(unsigned long)((bits_per_word - 1));
+
+    l = length / bits_per_word * bytes_per_word;
+
+    /* allocate memory, then set parameters */
+    if (l == 0) {
+        v->word = NULL;
+        v->length = 0;
+        return -1;
+    } else {
+        v->word = (uint32_t *)srtp_crypto_alloc(l);
+        if (v->word == NULL) {
+            v->length = 0;
+            return -1;
+        }
+    }
+    v->length = length;
+
+    /* initialize bitvector to zero */
+    bitvector_set_to_zero(v);
+
+    return 0;
+}
+
+void bitvector_dealloc(bitvector_t *v)
+{
+    if (v->word != NULL)
+        srtp_crypto_free(v->word);
+    v->word = NULL;
+    v->length = 0;
+}
+
+void bitvector_set_to_zero(bitvector_t *x)
+{
+    /* C99 guarantees that memset(0) will set the value 0 for uint32_t */
+    memset(x->word, 0, x->length >> 3);
+}
+
+void bitvector_left_shift(bitvector_t *x, int shift)
+{
+    int i;
+    const int base_index = shift >> 5;
+    const int bit_index = shift & 31;
+    const int word_length = x->length >> 5;
+
+    if (shift >= (int)x->length) {
+        bitvector_set_to_zero(x);
+        return;
+    }
+
+    if (bit_index == 0) {
+        for (i = 0; i < word_length - base_index; i++)
+            x->word[i] = x->word[i + base_index];
+    } else {
+        for (i = 0; i < word_length - base_index - 1; i++)
+            x->word[i] = (x->word[i + base_index] >> bit_index) ^
+                         (x->word[i + base_index + 1] << (32 - bit_index));
+        x->word[word_length - base_index - 1] =
+            x->word[word_length - 1] >> bit_index;
+    }
+
+    /* now wrap up the final portion */
+    for (i = word_length - base_index; i < word_length; i++)
+        x->word[i] = 0;
+}
+
+int srtp_octet_string_is_eq(uint8_t *a, uint8_t *b, int len)
+{
+    uint8_t *end = b + len;
+    uint8_t accumulator = 0;
+
+    /*
+     * We use this somewhat obscure implementation to try to ensure the running
+     * time only depends on len, even accounting for compiler optimizations.
+     * The accumulator ends up zero iff the strings are equal.
+     */
+    while (b < end)
+        accumulator |= (*a++ ^ *b++);
+
+    /* Return 1 if *not* equal. */
+    return accumulator != 0;
+}
+
+void srtp_cleanse(void *s, size_t len)
+{
+    volatile unsigned char *p = (volatile unsigned char *)s;
+    while (len--)
+        *p++ = 0;
+}
+
+void octet_string_set_to_zero(void *s, size_t len)
+{
+#if defined(OPENSSL) && !defined(OPENSSL_CLEANSE_BROKEN)
+    OPENSSL_cleanse(s, len);
+#else
+    srtp_cleanse(s, len);
+#endif
+}