Adding upstream version 1:0.5.47.upstream/1%0.5.47

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

1 files changed, 196 insertions, 0 deletions

diff --git a/htp/htp_base64.c b/htp/htp_base64.c
new file mode 100644
index 0000000..75dc122
--- /dev/null
+++ b/htp/htp_base64.c
@@ -0,0 +1,196 @@
+/***************************************************************************
+ * Copyright (c) 2009-2010 Open Information Security Foundation
+ * Copyright (c) 2010-2013 Qualys, 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 Qualys, 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
+ * HOLDER 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.
+ ***************************************************************************/
+
+/**
+ * @file
+ * @author Ivan Ristic <ivanr@webkreator.com>
+ */
+
+/* Adapted from the libb64 project (http://sourceforge.net/projects/libb64), which is in public domain. */
+
+#include "bstr.h"
+#include "htp_base64.h"
+
+/**
+ * Decode single base64-encoded character.
+ *
+ * @param[in] value_in
+ * @return decoded character
+ */
+int htp_base64_decode_single(signed char value_in) {
+    static const signed char decoding[] = {62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
+        -1, -1, -1, -2, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
+        18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34,
+        35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51};
+    static const signed char decoding_size = sizeof (decoding);
+
+    value_in -= 43;
+
+    if ((value_in < 0) || (value_in > decoding_size - 1)) return -1;
+
+    return decoding[(int) value_in];
+}
+
+/**
+ * Initialize base64 decoder.
+ *
+ * @param[in] decoder
+ */
+void htp_base64_decoder_init(htp_base64_decoder *decoder) {
+    decoder->step = step_a;
+    decoder->plainchar = 0;
+}
+
+/**
+ * Feed the supplied memory range to the decoder.
+ *
+ * @param[in] decoder
+ * @param[in] _code_in
+ * @param[in] length_in
+ * @param[in] _plaintext_out
+ * @param[in] length_out
+ * @return how many bytes were placed into plaintext output
+ */
+int htp_base64_decode(htp_base64_decoder *decoder, const void *_code_in, int length_in, void *_plaintext_out, int length_out) {
+    const unsigned char *code_in = (const unsigned char *)_code_in;
+    unsigned char *plaintext_out = (unsigned char *)_plaintext_out;
+    const unsigned char *codechar = code_in;
+    unsigned char *plainchar = plaintext_out;
+    signed char fragment;
+
+    if (length_out <= 0) return 0;
+
+    *plainchar = decoder->plainchar;
+
+    switch (decoder->step) {
+            while (1) {
+                case step_a:
+                do {
+                    if (codechar == code_in + length_in) {
+                        decoder->step = step_a;
+                        decoder->plainchar = *plainchar;
+                        return (int) (plainchar - plaintext_out);
+                    }
+                    fragment = (char) htp_base64_decode_single(*codechar++);
+                } while (fragment < 0);
+                *plainchar = (unsigned char) ((fragment & 0x03f) << 2);
+                /* fall through */
+
+                case step_b:
+                do {
+                    if (codechar == code_in + length_in) {
+                        decoder->step = step_b;
+                        decoder->plainchar = *plainchar;
+                        return (int) (plainchar - plaintext_out);
+                    }
+                    fragment = (char) htp_base64_decode_single(*codechar++);
+                } while (fragment < 0);
+                *plainchar++ |= (fragment & 0x030) >> 4;
+                *plainchar = (unsigned char) ((fragment & 0x00f) << 4);
+                if (--length_out == 0) {
+                    return (int) (plainchar - plaintext_out);
+                }
+                /* fall through */
+
+                case step_c:
+                do {
+                    if (codechar == code_in + length_in) {
+                        decoder->step = step_c;
+                        decoder->plainchar = *plainchar;
+                        return (int) (plainchar - plaintext_out);
+                    }
+                    fragment = (char) htp_base64_decode_single(*codechar++);
+                } while (fragment < 0);
+                *plainchar++ |= (fragment & 0x03c) >> 2;
+                *plainchar = (unsigned char) ((fragment & 0x003) << 6);
+                if (--length_out == 0) {
+                    return (int) (plainchar - plaintext_out);
+                }
+                /* fall through */
+
+                case step_d:
+                do {
+                    if (codechar == code_in + length_in) {
+                        decoder->step = step_d;
+                        decoder->plainchar = *plainchar;
+                        return (int) (plainchar - plaintext_out);
+                    }
+                    fragment = (char) htp_base64_decode_single(*codechar++);
+                } while (fragment < 0);
+                *plainchar++ |= (fragment & 0x03f);
+                if (--length_out == 0) {
+                    return (int) (plainchar - plaintext_out);
+                }
+                /* fall through */
+            }
+    }
+
+    /* control should not reach here */
+    return plainchar - plaintext_out;
+}
+
+/**
+ * Base64-decode input, given as bstring.
+ *
+ * @param[in] input
+ * @return new base64-decoded bstring
+ */
+bstr *htp_base64_decode_bstr(bstr *input) {
+    return htp_base64_decode_mem(bstr_ptr(input), bstr_len(input));
+}
+
+/**
+ * Base64-decode input, given as memory range.
+ *
+ * @param[in] data
+ * @param[in] len
+ * @return new base64-decoded bstring
+ */
+bstr *htp_base64_decode_mem(const void *data, size_t len) {
+    htp_base64_decoder decoder;
+    bstr *r = NULL;
+
+    htp_base64_decoder_init(&decoder);
+
+    unsigned char *tmpstr = malloc(len);
+    if (tmpstr == NULL) return NULL;
+
+    int resulting_len = htp_base64_decode(&decoder, data, (int) len, tmpstr, (int) len);
+    if (resulting_len > 0) {
+        r = bstr_dup_mem(tmpstr, resulting_len);
+    }
+
+    free(tmpstr);
+
+    return r;
+}