63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*/
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#ifndef UTIL_LINUX_FILEEQ
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#define UTIL_LINUX_FILEEQ
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#if defined(__linux__) && defined(HAVE_LINUX_IF_ALG_H)
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# define USE_FILEEQ_CRYPTOAPI 1
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#endif
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/* Number of bytes from the beginning of the file we always
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* compare by memcmp() */
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#define UL_FILEEQ_INTROSIZ 32
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struct ul_fileeq_data {
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unsigned char intro[UL_FILEEQ_INTROSIZ];
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unsigned char *blocks;
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size_t nblocks;
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size_t maxblocks;
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int fd;
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const char *name;
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bool is_eof;
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};
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struct ul_fileeq {
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int fd_api; /* Crypto socket */
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int fd_cip; /* Cipher handler */
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size_t readsiz;
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uint64_t filesiz;
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uint64_t blocksmax;
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const struct ul_fileeq_method *method;
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/* UL_FILEEQ_MEMCMP buffers */
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unsigned char *buf_a;
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unsigned char *buf_b;
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unsigned char *buf_last;
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};
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extern int ul_fileeq_init(struct ul_fileeq *eq, const char *method);
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extern void ul_fileeq_deinit(struct ul_fileeq *eq);
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extern int ul_fileeq_data_associated(struct ul_fileeq_data *data);
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extern void ul_fileeq_data_close_file(struct ul_fileeq_data *data);
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extern void ul_fileeq_data_init(struct ul_fileeq_data *data);
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extern void ul_fileeq_data_deinit(struct ul_fileeq_data *data);
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extern void ul_fileeq_data_set_file(struct ul_fileeq_data *data,
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const char *name);
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extern size_t ul_fileeq_set_size(struct ul_fileeq *eq, uint64_t filesiz,
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size_t readsiz, size_t memsiz);
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extern int ul_fileeq(struct ul_fileeq *eq,
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struct ul_fileeq_data *a, struct ul_fileeq_data *b);
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#endif /* UTIL_LINUX_FILEEQ */
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