4 * \brief RFC 1521 base64 encoding/decoding
7 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
8 * SPDX-License-Identifier: Apache-2.0
10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
11 * not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
14 * http://www.apache.org/licenses/LICENSE-2.0
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
22 * This file is part of mbed TLS (https://tls.mbed.org)
24 #ifndef MBEDTLS_BASE64_H
25 #define MBEDTLS_BASE64_H
27 #if !defined(MBEDTLS_CONFIG_FILE)
30 #include MBEDTLS_CONFIG_FILE
35 #define MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL -0x002A /**< Output buffer too small. */
36 #define MBEDTLS_ERR_BASE64_INVALID_CHARACTER -0x002C /**< Invalid character in input. */
43 * \brief Encode a buffer into base64 format
45 * \param dst destination buffer
46 * \param dlen size of the destination buffer
47 * \param olen number of bytes written
48 * \param src source buffer
49 * \param slen amount of data to be encoded
51 * \return 0 if successful, or MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL.
52 * *olen is always updated to reflect the amount
53 * of data that has (or would have) been written.
54 * If that length cannot be represented, then no data is
55 * written to the buffer and *olen is set to the maximum
56 * length representable as a size_t.
58 * \note Call this function with dlen = 0 to obtain the
59 * required buffer size in *olen
61 int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
62 const unsigned char *src, size_t slen );
65 * \brief Decode a base64-formatted buffer
67 * \param dst destination buffer (can be NULL for checking size)
68 * \param dlen size of the destination buffer
69 * \param olen number of bytes written
70 * \param src source buffer
71 * \param slen amount of data to be decoded
73 * \return 0 if successful, MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL, or
74 * MBEDTLS_ERR_BASE64_INVALID_CHARACTER if the input data is
75 * not correct. *olen is always updated to reflect the amount
76 * of data that has (or would have) been written.
78 * \note Call this function with *dst = NULL or dlen = 0 to obtain
79 * the required buffer size in *olen
81 int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
82 const unsigned char *src, size_t slen );
84 #if defined(MBEDTLS_SELF_TEST)
86 * \brief Checkup routine
88 * \return 0 if successful, or 1 if the test failed
90 int mbedtls_base64_self_test( int verbose );
92 #endif /* MBEDTLS_SELF_TEST */