/*
- * Base64.c
* Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
-* @file base64.c
- * @brief Base64 Encode/Decode
+ * @file
+ * @brief Base64 encode/decode
* @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
*/
#include "base64.h"
/* ---------------- private code */
-static uint8_t map2[] =
+static const uint8_t map2[] =
{
0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
};
-int av_base64_decode(uint8_t * out, const char *in, int out_length)
+int av_base64_decode(uint8_t *out, const char *in, int out_size)
{
- int i, v;
+ int i;
+ unsigned v = 0;
uint8_t *dst = out;
- v = 0;
for (i = 0; in[i] && in[i] != '='; i++) {
unsigned int index= in[i]-43;
- if (index>=(sizeof(map2)/sizeof(map2[0])) || map2[index] == 0xff)
+ if (index>=FF_ARRAY_ELEMS(map2) || map2[index] == 0xff)
return -1;
v = (v << 6) + map2[index];
if (i & 3) {
- if (dst - out < out_length) {
+ if (dst - out < out_size) {
*dst++ = v >> (6 - 2 * (i & 3));
}
}
}
- return (dst - out);
+ return dst - out;
}
/*****************************************************************************
-* b64_encode: stolen from VLC's http.c
-* simplified by michael
-* fixed edge cases and made it work from data (vs. strings) by ryan.
+* b64_encode: Stolen from VLC's http.c.
+* Simplified by Michael.
+* Fixed edge cases and made it work from data (vs. strings) by Ryan.
*****************************************************************************/
-char *av_base64_encode(char *out, int out_len, uint8_t * src, int len)
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
{
static const char b64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- char *dst;
+ char *ret, *dst;
unsigned i_bits = 0;
int i_shift = 0;
- int bytes_remaining = len;
+ int bytes_remaining = in_size;
- if (len < UINT_MAX / 4 && out_len > (len * 4 / 3 + 12) && out) {
- dst = out;
- } else
+ if (in_size >= UINT_MAX / 4 ||
+ out_size < AV_BASE64_SIZE(in_size))
return NULL;
-
- if (len) { // special edge case, what should we really do here?
- while (bytes_remaining) {
- i_bits = (i_bits << 8) + *src++;
- bytes_remaining--;
- i_shift += 8;
-
- do {
- *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
- i_shift -= 6;
- } while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
- }
- while ((dst - out) & 3)
- *dst++ = '=';
+ ret = dst = out;
+ while (bytes_remaining) {
+ i_bits = (i_bits << 8) + *in++;
+ bytes_remaining--;
+ i_shift += 8;
+
+ do {
+ *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
+ i_shift -= 6;
+ } while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
}
+ while ((dst - ret) & 3)
+ *dst++ = '=';
*dst = '\0';
- return out;
+ return ret;
}
-// #define TEST_BASE64
+#ifdef TEST
-#ifdef TEST_BASE64
-#include "avutil.h"
+#define MAX_DATA_SIZE 1024
+#define MAX_ENCODED_SIZE 2048
-int b64test()
+static int test_encode_decode(const uint8_t *data, unsigned int data_size,
+ const char *encoded_ref)
{
- int numerr = 0;
- int len;
- int numtest = 1;
- uint8_t decode[1000];
- struct test {
- void *data;
- int len;
- const char *result;
- } *t, tests[] = {
- {
- "", 0, ""}, {
- "1", 1, "MQ=="}, {
- "22", 2, "MjI="}, {
- "333", 3, "MzMz"}, {
- "4444", 4, "NDQ0NA=="}, {
- "55555", 5, "NTU1NTU="}, {
- "abc:def", 7, "YWJjOmRlZg=="}, {
- NULL}
- };
- for (t = tests; t->data; t++) {
- char *str;
- int ret;
-
- av_log(NULL, AV_LOG_ERROR, "Encoding %s...\n", (char *) t->data);
- str = av_malloc(t->len * 4 / 3 + 12);
- ret = av_base64_encode(str, t->len * 4 / 3 + 12, t->data, t->len);
- if (ret > 0) {
- av_log(NULL, AV_LOG_ERROR, "Encoded to %s...\n", str);
- if (strcmp(str, t->result) != 0) {
- av_log(NULL, AV_LOG_ERROR, "failed test %d: %s != %s\n",
- numtest, str, t->result);
- numerr++;
- }
- av_free(str);
- }
+ char encoded[MAX_ENCODED_SIZE];
+ uint8_t data2[MAX_DATA_SIZE];
+ int data2_size, max_data2_size = MAX_DATA_SIZE;
- av_log(NULL, AV_LOG_ERROR, "Done encoding, about to decode...\n");
- len = av_base64_decode(decode, t->result, sizeof(decode));
- if (len != t->len) {
- av_log(NULL, AV_LOG_ERROR, "failed test %d: len %d != %d\n",
- numtest, len, t->len);
- numerr++;
- } else if (memcmp(decode, t->data, t->len) != 0) {
- av_log(NULL, AV_LOG_ERROR, "failed test %d: data\n", numtest);
- numerr++;
- } else {
- av_log(NULL, AV_LOG_ERROR, "Decoded to %s\n",
- (char *) t->data);
- }
- numtest++;
+ if (!av_base64_encode(encoded, MAX_ENCODED_SIZE, data, data_size)) {
+ printf("Failed: cannot encode the input data\n");
+ return 1;
}
-
-#undef srand
-#undef rand
-
- {
- int test_count;
- srand(123141); // time(NULL));
- for (test_count = 0; test_count < 100; test_count++) {
- int size = rand() % 1024;
- int ii, ret;
- uint8_t *data;
- char *encoded_result = av_malloc(size * 4 / 3 + 12);
-
- av_log(NULL, AV_LOG_ERROR, "Test %d: Size %d bytes...",
- test_count, size);
- data = (uint8_t *) av_malloc(size);
- for (ii = 0; ii < size; ii++) {
- data[ii] = rand() % 255;
- }
-
- ret = av_base64_encode(encoded_result, size * 4 / 3 + 12,
- data, size);
- if (ret > 0) {
- int decode_buffer_size = size + 10; // try without 10 as well
- uint8_t *decode_buffer = av_malloc(decode_buffer_size);
- if (decode_buffer) {
- int decoded_size =
- av_base64_decode(decode_buffer, encoded_result,
- decode_buffer_size);
-
- if (decoded_size != size) {
- av_log(NULL, AV_LOG_ERROR,
- "Decoded/Encoded size mismatch (%d != %d)\n",
- decoded_size, size);
- } else {
- if (memcmp(decode_buffer, data, decoded_size) == 0) {
- av_log(NULL, AV_LOG_ERROR, "Passed!\n");
- } else {
- av_log(NULL, AV_LOG_ERROR,
- "Failed (Data differs)!\n");
- }
- }
- av_free(decode_buffer);
- }
-
- av_free(encoded_result);
- }
- }
+ if (encoded_ref && strcmp(encoded, encoded_ref)) {
+ printf("Failed: encoded string differs from reference\n"
+ "Encoded:\n%s\nReference:\n%s\n", encoded, encoded_ref);
+ return 1;
}
- // these are invalid strings, that it currently decodes (which it probably shouldn't?)
- {
- uint8_t str[32];
- if (av_base64_decode(str, "M=M=", sizeof(str)) != -1) {
- av_log(NULL, AV_LOG_ERROR,
- "failed test %d: successful decode of `M=M='\n",
- numtest++);
- numerr++;
- }
- if (av_base64_decode(str, "MQ===", sizeof(str)) != -1) {
- av_log(NULL, AV_LOG_ERROR,
- "failed test %d: successful decode of `MQ==='\n",
- numtest++);
- numerr++;
- }
+ if ((data2_size = av_base64_decode(data2, encoded, max_data2_size)) < 0) {
+ printf("Failed: cannot decode the encoded string\n"
+ "Encoded:\n%s\n", encoded);
+ return 1;
+ }
+ if (memcmp(data2, data, data_size)) {
+ printf("Failed: encoded/decoded data differs from original data\n");
+ return 1;
}
- return numerr;
+ printf("Passed!\n");
+ return 0;
}
-#endif
+int main(void)
+{
+ int i, error_count = 0;
+ struct test {
+ const uint8_t *data;
+ const char *encoded_ref;
+ } tests[] = {
+ { "", ""},
+ { "1", "MQ=="},
+ { "22", "MjI="},
+ { "333", "MzMz"},
+ { "4444", "NDQ0NA=="},
+ { "55555", "NTU1NTU="},
+ { "666666", "NjY2NjY2"},
+ { "abc:def", "YWJjOmRlZg=="},
+ };
+
+ printf("Encoding/decoding tests\n");
+ for (i = 0; i < FF_ARRAY_ELEMS(tests); i++)
+ error_count += test_encode_decode(tests[i].data, strlen(tests[i].data), tests[i].encoded_ref);
+
+ if (error_count)
+ printf("Error Count: %d.\n", error_count);
+
+ return !!error_count;
+}
+
+#endif
projects / ffmpeg / blobdiff