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Diffstat (limited to 'runtime/libgcry.h')
| -rw-r--r-- | runtime/libgcry.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/runtime/libgcry.h b/runtime/libgcry.h new file mode 100644 index 0000000..15fce71 --- /dev/null +++ b/runtime/libgcry.h @@ -0,0 +1,87 @@ +/* libgcry.h - rsyslog's guardtime support library + * + * Copyright 2013 Adiscon GmbH. + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef INCLUDED_LIBGCRY_H +#define INCLUDED_LIBGCRY_H +#include <stdint.h> +#include <gcrypt.h> + +struct gcryctx_s { + uchar *key; + size_t keyLen; + int algo; + int mode; +}; +typedef struct gcryctx_s *gcryctx; +typedef struct gcryfile_s *gcryfile; + +/* this describes a file, as far as libgcry is concerned */ +struct gcryfile_s { + gcry_cipher_hd_t chd; /* cypher handle */ + size_t blkLength; /* size of low-level crypto block */ + uchar *eiName; /* name of .encinfo file */ + int fd; /* descriptor of .encinfo file (-1 if not open) */ + char openMode; /* 'r': read, 'w': write */ + gcryctx ctx; + uchar *readBuf; + int16_t readBufIdx; + int16_t readBufMaxIdx; + int8_t bDeleteOnClose; /* for queue support, similar to stream subsys */ + ssize_t bytesToBlkEnd; /* number of bytes remaining in current crypto block + -1 means -> no end (still being writen to, queue files), + 0 means -> end of block, new one must be started. */ +}; + +int gcryGetKeyFromFile(const char *fn, char **key, unsigned *keylen); +int rsgcryInit(void); +void rsgcryExit(void); +int rsgcrySetKey(gcryctx ctx, unsigned char *key, uint16_t keyLen); +rsRetVal rsgcrySetMode(gcryctx ctx, uchar *algoname); +rsRetVal rsgcrySetAlgo(gcryctx ctx, uchar *modename); +gcryctx gcryCtxNew(void); +void rsgcryCtxDel(gcryctx ctx); +int gcryfileDestruct(gcryfile gf, off64_t offsLogfile); +rsRetVal rsgcryInitCrypt(gcryctx ctx, gcryfile *pgf, uchar *fname, char openMode); +rsRetVal rsgcryEncrypt(gcryfile pF, uchar *buf, size_t *len); +rsRetVal rsgcryDecrypt(gcryfile pF, uchar *buf, size_t *len); +int gcryGetKeyFromProg(char *cmd, char **key, unsigned *keylen); +rsRetVal gcryfileDeleteState(uchar *fn); +rsRetVal gcryfileGetBytesLeftInBlock(gcryfile gf, ssize_t *left); +int rsgcryModename2Mode(char *const __restrict__ modename); +int rsgcryAlgoname2Algo(char *const __restrict__ algoname); + +/* error states */ +#define RSGCRYE_EI_OPEN 1 /* error opening .encinfo file */ +#define RSGCRYE_OOM 4 /* ran out of memory */ + +#define EIF_MAX_RECTYPE_LEN 31 /* max length of record types */ +#define EIF_MAX_VALUE_LEN 1023 /* max length of value types */ +#define RSGCRY_FILETYPE_NAME "rsyslog-enrcyption-info" +#define ENCINFO_SUFFIX ".encinfo" + +/* Note: gf may validly be NULL, e.g. if file has not yet been opened! */ +static inline void __attribute__((unused)) +gcryfileSetDeleteOnClose(gcryfile gf, const int val) +{ + if(gf != NULL) + gf->bDeleteOnClose = val; +} + +#endif /* #ifndef INCLUDED_LIBGCRY_H */ |