blob: 2954c12d4271c7411e117c120e24f13f2cf8744b
| 1 | /* |
| 2 | * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com) |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_BASE64_H |
| 22 | #define AVUTIL_BASE64_H |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | /** |
| 27 | * @defgroup lavu_base64 Base64 |
| 28 | * @ingroup lavu_crypto |
| 29 | * @{ |
| 30 | */ |
| 31 | |
| 32 | /** |
| 33 | * Decode a base64-encoded string. |
| 34 | * |
| 35 | * @param out buffer for decoded data |
| 36 | * @param in null-terminated input string |
| 37 | * @param out_size size in bytes of the out buffer, must be at |
| 38 | * least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in)) |
| 39 | * @return number of bytes written, or a negative value in case of |
| 40 | * invalid input |
| 41 | */ |
| 42 | int av_base64_decode(uint8_t *out, const char *in, int out_size); |
| 43 | |
| 44 | /** |
| 45 | * Calculate the output size in bytes needed to decode a base64 string |
| 46 | * with length x to a data buffer. |
| 47 | */ |
| 48 | #define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4) |
| 49 | |
| 50 | /** |
| 51 | * Encode data to base64 and null-terminate. |
| 52 | * |
| 53 | * @param out buffer for encoded data |
| 54 | * @param out_size size in bytes of the out buffer (including the |
| 55 | * null terminator), must be at least AV_BASE64_SIZE(in_size) |
| 56 | * @param in input buffer containing the data to encode |
| 57 | * @param in_size size in bytes of the in buffer |
| 58 | * @return out or NULL in case of error |
| 59 | */ |
| 60 | char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size); |
| 61 | |
| 62 | /** |
| 63 | * Calculate the output size needed to base64-encode x bytes to a |
| 64 | * null-terminated string. |
| 65 | */ |
| 66 | #define AV_BASE64_SIZE(x) (((x)+2) / 3 * 4 + 1) |
| 67 | |
| 68 | /** |
| 69 | * @} |
| 70 | */ |
| 71 | |
| 72 | #endif /* AVUTIL_BASE64_H */ |
| 73 |