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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /nsprpub/lib/libc/include/plbase64.h | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'nsprpub/lib/libc/include/plbase64.h')
-rw-r--r-- | nsprpub/lib/libc/include/plbase64.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/nsprpub/lib/libc/include/plbase64.h b/nsprpub/lib/libc/include/plbase64.h new file mode 100644 index 000000000..7d17ea78f --- /dev/null +++ b/nsprpub/lib/libc/include/plbase64.h @@ -0,0 +1,76 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef _plbase64_h +#define _plbase64_h + +#include "prtypes.h" + +PR_BEGIN_EXTERN_C + +/* + * PL_Base64Encode + * + * This routine encodes the data pointed to by the "src" parameter using the + * base64 algorithm, and returns a pointer to the result. If the "srclen" + * parameter is not zero, it specifies the length of the source data. If it + * is zero, the source data is assumed to be null-terminated, and PL_strlen + * is used to determine the source length. If the "dest" parameter is not + * null, it is assumed to point to a buffer of sufficient size (which may be + * calculated: ((srclen + 2)/3)*4) into which the encoded data is placed + * (without any termination). If the "dest" parameter is null, a buffer is + * allocated from the heap to hold the encoded data, and the result *will* + * be terminated with an extra null character. It is the caller's + * responsibility to free the result when it is allocated. A null is returned + * if the allocation fails. + * + * NOTE: when calculating ((srclen + 2)/3)*4), first ensure that + * srclen <= (PR_UINT32_MAX/4) * 3 + * to avoid PRUint32 overflow. + */ + +PR_EXTERN(char *) +PL_Base64Encode +( + const char *src, + PRUint32 srclen, + char *dest +); + +/* + * PL_Base64Decode + * + * This routine decodes the data pointed to by the "src" parameter using + * the base64 algorithm, and returns a pointer to the result. The source + * may either include or exclude any trailing '=' characters. If the + * "srclen" parameter is not zero, it specifies the length of the source + * data. If it is zero, PL_strlen will be used to determine the source + * length. If the "dest" parameter is not null, it is assumed to point to + * a buffer of sufficient size (which may be calculated: (srclen * 3)/4 + * when srclen includes the '=' characters) into which the decoded data + * is placed (without any termination). If the "dest" parameter is null, + * a buffer is allocated from the heap to hold the decoded data, and the + * result *will* be terminated with an extra null character. It is the + * caller's responsibility to free the result when it is allocated. A null + * is retuned if the allocation fails, or if the source is not well-coded. + * + * NOTE: when calculating (srclen * 3)/4, first ensure that + * srclen <= PR_UINT32_MAX/3 + * to avoid PRUint32 overflow. Alternatively, calculate + * (srclen/4) * 3 + ((srclen%4) * 3)/4 + * which is equivalent but doesn't overflow for any value of srclen. + */ + +PR_EXTERN(char *) +PL_Base64Decode +( + const char *src, + PRUint32 srclen, + char *dest +); + +PR_END_EXTERN_C + +#endif /* _plbase64_h */ |