/* gzwrite.c -- zlib functions for writing gzip files * Copyright (C) 2004-2017 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ #include "gzguts.h" /* Local functions */ local int gz_init OF((gz_statep)); local int gz_comp OF((gz_statep, int)); local int gz_zero OF((gz_statep, z_off64_t)); local z_size_t gz_write OF((gz_statep, voidpc, z_size_t)); /* Initialize state for writing a gzip file. Mark initialization by setting state->size to non-zero. Return -1 on a memory allocation failure, or 0 on success. */ local int gz_init(state) gz_statep state; { int ret; z_streamp strm = &(state->strm); /* allocate input buffer (double size for gzprintf) */ state->in = (unsigned char *)malloc(state->want << 1); if (state->in == NULL) { gz_error(state, Z_MEM_ERROR, "out of memory"); return -1; } /* only need output buffer and deflate state if compressing */ if (!state->direct) { /* allocate output buffer */ state->out = (unsigned char *)malloc(state->want); if (state->out == NULL) { free(state->in); gz_error(state, Z_MEM_ERROR, "out of memory"); return -1; } /* allocate deflate memory, set up for gzip compression */ strm->zalloc = Z_NULL; strm->zfree = Z_NULL; strm->opaque = Z_NULL; ret = deflateInit2(strm, state->level, Z_DEFLATED, MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy); if (ret != Z_OK) { free(state->out); free(state->in); gz_error(state, Z_MEM_ERROR, "out of memory"); return -1; } strm->next_in = NULL; } /* mark state as initialized */ state->size = state->want; /* initialize write buffer if compressing */ if (!state->direct) { strm->avail_out = state->size; strm->next_out = state->out; state->x.next = strm->next_out; } return 0; } /* Compress whatever is at avail_in and next_in and write to the output file. Return -1 if there is an error writing to the output file or if gz_init() fails to allocate memory, otherwise 0. flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH, then the deflate() state is reset to start a new gzip stream. If gz->direct is true, then simply write to the output file without compressing, and ignore flush. */ local int gz_comp(state, flush) gz_statep state; int flush; { int ret, writ; unsigned have, put, max = ((unsigned)-1 >> 2) + 1; z_streamp strm = &(state->strm); /* allocate memory if this is the first time through */ if (state->size == 0 && gz_init(state) == -1) return -1; /* write directly if requested */ if (state->direct) { while (strm->avail_in) { put = strm->avail_in > max ? max : strm->avail_in; writ = write(state->fd, strm->next_in, put); if (writ < 0) { gz_error(state, Z_ERRNO, zstrerror()); return -1; } strm->avail_in -= (unsigned)writ; strm->next_in += writ; } return 0; } /* run deflate() on provided input until it produces no more output */ ret = Z_OK; do { /* write out current buffer contents if full, or if flushing, but if doing Z_FINISH then don't write until we get to Z_STREAM_END */ if (strm->avail_out == 0 || (flush != Z_NO_FLUSH && (flush != Z_FINISH || ret == Z_STREAM_END))) { while (strm->next_out > state->x.next) { put = strm->next_out - state->x.next > (int)max ? max : (unsigned)(strm->next_out - state->x.next); writ = write(state->fd, state->x.next, put); if (writ < 0) { gz_error(state, Z_ERRNO, zstrerror()); return -1; } state->x.next += writ; } if (strm->avail_out == 0) { strm->avail_out = state->size; strm->next_out = state->out; state->x.next = state->out; } } /* compress */ have = strm->avail_out; ret = deflate(strm, flush); if (ret == Z_STREAM_ERROR) { gz_error(state, Z_STREAM_ERROR, "internal error: deflate stream corrupt"); return -1; } have -= strm->avail_out; } while (have); /* if that completed a deflate stream, allow another to start */ if (flush == Z_FINISH) deflateReset(strm); /* all done, no errors */ return 0; } /* Compress len zeros to output. Return -1 on a write error or memory allocation failure by gz_comp(), or 0 on success. */ local int gz_zero(state, len) gz_statep state; z_off64_t len; { int first; unsigned n; z_streamp strm = &(state->strm); /* consume whatever's left in the input buffer */ if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1) return -1; /* compress len zeros (len guaranteed > 0) */ first = 1; while (len) { n = GT_OFF(state->size) || (z_off
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
 *
 */

/* Adapted for VeraCrypt */

#ifndef _SHA2_SMALL_H
#define _SHA2_SMALL_H

#include "Common/Tcdefs.h"
#include "Common/Endian.h"

#define SHA256_DIGEST_SIZE  32
#define SHA256_BLOCK_SIZE   64

#define VOID_RETURN	void
#define INT_RETURN	int

#if defined(__cplusplus)
extern "C"
{
#endif

typedef struct {

	uint32		highLength;
	uint32		lowLength;
	uint32		state[8];
	unsigned int curlen;
	unsigned char buf[64];
} sha256_ctx;

/******************************************************************************/

VOID_RETURN sha256_begin(sha256_ctx* ctx);
VOID_RETURN sha256_hash(unsigned char* data, unsigned int len, sha256_ctx* ctx);
VOID_RETURN sha256_end(unsigned char* hval, sha256_ctx* ctx);

#if defined(__cplusplus)
}
#endif

/******************************************************************************/

#endif /* _h_PS_DIGEST */
/******************************************************************************/
char *next; gz_statep state; z_streamp strm; /* get internal structure */ if (file == NULL) return Z_STREAM_ERROR; state = (gz_statep)file; strm = &(state->strm); /* check that can really pass pointer in ints */ if (sizeof(int) != sizeof(void *)) return Z_STREAM_ERROR; /* check that we're writing and that there's no error */ if (state->mode != GZ_WRITE || state->err != Z_OK) return Z_STREAM_ERROR; /* make sure we have some buffer space */ if (state->size == 0 && gz_init(state) == -1) return state->error; /* check for seek request */ if (state->seek) { state->seek = 0; if (gz_zero(state, state->skip) == -1) return state->error; } /* do the printf() into the input buffer, put length in len -- the input buffer is double-sized just for this function, so there is guaranteed to be state->size bytes available after the current contents */ if (strm->avail_in == 0) strm->next_in = state->in; next = (char *)(strm->next_in + strm->avail_in); next[state->size - 1] = 0; #ifdef NO_snprintf # ifdef HAS_sprintf_void sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); for (len = 0; len < size; len++) if (next[len] == 0) break; # else len = sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); # endif #else # ifdef HAS_snprintf_void snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); len = strlen(next); # else len = snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); # endif #endif /* check that printf() results fit in buffer */ if (len == 0 || len >= state->size || next[state->size - 1] != 0) return 0; /* update buffer and position, compress first half if past that */ strm->avail_in += len; state->x.pos += len; if (strm->avail_in >= state->size) { left = strm->avail_in - state->size; strm->avail_in = state->size; if (gz_comp(state, Z_NO_FLUSH) == -1) return state->err; memcpy(state->in, state->in + state->size, left); strm->next_in = state->in; strm->avail_in = left; } return (int)len; } #endif /* -- see zlib.h -- */ int ZEXPORT gzflush(file, flush) gzFile file; int flush; { gz_statep state; /* get internal structure */ if (file == NULL) return Z_STREAM_ERROR; state = (gz_statep)file; /* check that we're writing and that there's no error */ if (state->mode != GZ_WRITE || state->err != Z_OK) return Z_STREAM_ERROR; /* check flush parameter */ if (flush < 0 || flush > Z_FINISH) return Z_STREAM_ERROR; /* check for seek request */ if (state->seek) { state->seek = 0; if (gz_zero(state, state->skip) == -1) return state->err; } /* compress remaining data with requested flush */ (void)gz_comp(state, flush); return state->err; } /* -- see zlib.h -- */ int ZEXPORT gzsetparams(file, level, strategy) gzFile file; int level; int strategy; { gz_statep state; z_streamp strm; /* get internal structure */ if (file == NULL) return Z_STREAM_ERROR; state = (gz_statep)file; strm = &(state->strm); /* check that we're writing and that there's no error */ if (state->mode != GZ_WRITE || state->err != Z_OK) return Z_STREAM_ERROR; /* if no change is requested, then do nothing */ if (level == state->level && strategy == state->strategy) return Z_OK; /* check for seek request */ if (state->seek) { state->seek = 0; if (gz_zero(state, state->skip) == -1) return state->err; } /* change compression parameters for subsequent input */ if (state->size) { /* flush previous input with previous parameters before changing */ if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1) return state->err; deflateParams(strm, level, strategy); } state->level = level; state->strategy = strategy; return Z_OK; } /* -- see zlib.h -- */ int ZEXPORT gzclose_w(file) gzFile file; { int ret = Z_OK; gz_statep state; /* get internal structure */ if (file == NULL) return Z_STREAM_ERROR; state = (gz_statep)file; /* check that we're writing */ if (state->mode != GZ_WRITE) return Z_STREAM_ERROR; /* check for seek request */ if (state->seek) { state->seek = 0; if (gz_zero(state, state->skip) == -1) ret = state->err; } /* flush, free memory, and close file */ if (gz_comp(state, Z_FINISH) == -1) ret = state->err; if (state->size) { if (!state->direct) { (void)deflateEnd(&(state->strm)); free(state->out); } free(state->in); } gz_error(state, Z_OK, NULL); free(state->path); if (close(state->fd) == -1) ret = Z_ERRNO; free(state); return ret; }