--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/asn1.h>
+
+#include <limits.h>
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/mem.h>
+
+#include "../internal.h"
+
+
+int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len)
+{
+ return M_ASN1_BIT_STRING_set(x, d, len);
+}
+
+int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp)
+{
+ int ret, j, bits, len;
+ unsigned char *p, *d;
+
+ if (a == NULL)
+ return (0);
+
+ len = a->length;
+
+ if (len > 0) {
+ if (a->flags & ASN1_STRING_FLAG_BITS_LEFT) {
+ bits = (int)a->flags & 0x07;
+ } else {
+ for (; len > 0; len--) {
+ if (a->data[len - 1])
+ break;
+ }
+ j = a->data[len - 1];
+ if (j & 0x01)
+ bits = 0;
+ else if (j & 0x02)
+ bits = 1;
+ else if (j & 0x04)
+ bits = 2;
+ else if (j & 0x08)
+ bits = 3;
+ else if (j & 0x10)
+ bits = 4;
+ else if (j & 0x20)
+ bits = 5;
+ else if (j & 0x40)
+ bits = 6;
+ else if (j & 0x80)
+ bits = 7;
+ else
+ bits = 0; /* should not happen */
+ }
+ } else
+ bits = 0;
+
+ ret = 1 + len;
+ if (pp == NULL)
+ return (ret);
+
+ p = *pp;
+
+ *(p++) = (unsigned char)bits;
+ d = a->data;
+ OPENSSL_memcpy(p, d, len);
+ p += len;
+ if (len > 0)
+ p[-1] &= (0xff << bits);
+ *pp = p;
+ return (ret);
+}
+
+ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a,
+ const unsigned char **pp, long len)
+{
+ ASN1_BIT_STRING *ret = NULL;
+ const unsigned char *p;
+ unsigned char *s;
+ int padding;
+
+ if (len < 1) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_SHORT);
+ goto err;
+ }
+
+ if (len > INT_MAX) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_LONG);
+ goto err;
+ }
+
+ if ((a == NULL) || ((*a) == NULL)) {
+ if ((ret = M_ASN1_BIT_STRING_new()) == NULL)
+ return (NULL);
+ } else
+ ret = (*a);
+
+ p = *pp;
+ padding = *(p++);
+ if (padding > 7) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
+ goto err;
+ }
+
+ /*
+ * We do this to preserve the settings. If we modify the settings, via
+ * the _set_bit function, we will recalculate on output
+ */
+ ret->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); /* clear */
+ ret->flags |= (ASN1_STRING_FLAG_BITS_LEFT | padding); /* set */
+
+ if (len-- > 1) { /* using one because of the bits left byte */
+ s = (unsigned char *)OPENSSL_malloc((int)len);
+ if (s == NULL) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ OPENSSL_memcpy(s, p, (int)len);
+ s[len - 1] &= (0xff << padding);
+ p += len;
+ } else
+ s = NULL;
+
+ ret->length = (int)len;
+ if (ret->data != NULL)
+ OPENSSL_free(ret->data);
+ ret->data = s;
+ ret->type = V_ASN1_BIT_STRING;
+ if (a != NULL)
+ (*a) = ret;
+ *pp = p;
+ return (ret);
+ err:
+ if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+ M_ASN1_BIT_STRING_free(ret);
+ return (NULL);
+}
+
+/*
+ * These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de>
+ */
+int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value)
+{
+ int w, v, iv;
+ unsigned char *c;
+
+ w = n / 8;
+ v = 1 << (7 - (n & 0x07));
+ iv = ~v;
+ if (!value)
+ v = 0;
+
+ if (a == NULL)
+ return 0;
+
+ a->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); /* clear, set on write */
+
+ if ((a->length < (w + 1)) || (a->data == NULL)) {
+ if (!value)
+ return (1); /* Don't need to set */
+ if (a->data == NULL)
+ c = (unsigned char *)OPENSSL_malloc(w + 1);
+ else
+ c = (unsigned char *)OPENSSL_realloc(a->data, w + 1);
+ if (c == NULL) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ if (w + 1 - a->length > 0)
+ OPENSSL_memset(c + a->length, 0, w + 1 - a->length);
+ a->data = c;
+ a->length = w + 1;
+ }
+ a->data[w] = ((a->data[w]) & iv) | v;
+ while ((a->length > 0) && (a->data[a->length - 1] == 0))
+ a->length--;
+ return (1);
+}
+
+int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n)
+{
+ int w, v;
+
+ w = n / 8;
+ v = 1 << (7 - (n & 0x07));
+ if ((a == NULL) || (a->length < (w + 1)) || (a->data == NULL))
+ return (0);
+ return ((a->data[w] & v) != 0);
+}
+
+/*
+ * Checks if the given bit string contains only bits specified by
+ * the flags vector. Returns 0 if there is at least one bit set in 'a'
+ * which is not specified in 'flags', 1 otherwise.
+ * 'len' is the length of 'flags'.
+ */
+int ASN1_BIT_STRING_check(ASN1_BIT_STRING *a,
+ unsigned char *flags, int flags_len)
+{
+ int i, ok;
+ /* Check if there is one bit set at all. */
+ if (!a || !a->data)
+ return 1;
+
+ /*
+ * Check each byte of the internal representation of the bit string.
+ */
+ ok = 1;
+ for (i = 0; i < a->length && ok; ++i) {
+ unsigned char mask = i < flags_len ? ~flags[i] : 0xff;
+ /* We are done if there is an unneeded bit set. */
+ ok = (a->data[i] & mask) == 0;
+ }
+ return ok;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff