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|
%% options
copyright owner = Dirk Krause
copyright year = 2011-xxxx
SPDX-License-Identifier: BSD-3-Clause
%% header
#include "dk3conf.h"
#include "dk3types.h"
#ifdef __cplusplus
extern "C" {
#endif
/** Get checksum type for a given name.
@param n Message digest name ("MD5", "SHA-1", "SHA-224",
"SHA-256", "SHA-384", "SHA-512", or "RIPEMD-160").
@param app Application structure for diagnostics, may be NULL.
@return Integer representation (see @ref mdtypes) on success,
-1 on error.
*/
int
dk3checksum_get_type_app(dkChar const *n, dk3_app_t *app);
/** Build checksum for a file.
@param db Destination buffer.
@param sz Size of destination buffer.
@param fn File name to process.
@param cst Checksum type (message digest type,
see @ref mdtypes).
@param cse Binary to text encoding for message digest
(see @ref dataencoding).
@param app Application structure for diagnostics, may be NULL.
@return 1 on success, 0 on error.
*/
int
dk3checksum_build_app(
char *db, size_t sz, dkChar const *fn, int cst, int cse, dk3_app_t *app
);
/** Get string length produced for a message digest and encoding type.
@param cst Message digest type, see @ref mdtypes.
@param cse Binary to text encoding, see @ref dataencoding.
@return Number of characters produced.
*/
size_t
dk3checksum_length(int cst, int cse);
/** Get name for message digest type.
@param tp Digest type, see @ref mdtypes.
@return Name for digest type.
*/
dkChar const *
dk3checksum_get_type_name(int tp);
#ifdef __cplusplus
}
#endif
%% module
#include "dk3all.h"
#if DK3_HAVE_OPENSSL_MD5_H
#include <openssl/md5.h>
#endif
#if DK3_HAVE_OPENSSL_SHA_H
#include <openssl/sha.h>
#endif
#if DK3_HAVE_OPENSSL_RIPEMD_H
#include <openssl/ripemd.h>
#endif
$!trace-include
/** Names of message digest algorithms.
Order here must match order of DK3_MD_TYPE_xxx in dk3const.h.
*/
static dkChar const * const dk3_checksum_type_names[] = {
/* 0 */ dkT("MD5"),
/* 1 */ dkT("SHA-1"),
/* 2 */ dkT("SHA-224"),
/* 3 */ dkT("SHA-256"),
/* 4 */ dkT("SHA-384"),
/* 5 */ dkT("SHA-512"),
/* 6 */ dkT("RIPEMD-160"),
NULL
};
/** String constants.
*/
static dkChar const * const kw[] = {
#if DK3_ON_WINDOWS
/* 0 */ dkT("rb"), /* File mode, read binary. */
#else
/* 0 */ dkT("r"), /* no difference on non-Windows. */
#endif
};
int
dk3checksum_get_type_app(dkChar const *n, dk3_app_t *app)
{
int back = -1;
if(n) {
back = dk3str_array_index(dk3_checksum_type_names, n, 0);
if(back == -1) {
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 127, 128, n);
}
} else {
back++;
}
}
return back;
}
/** Convert length of binary message digest to length of encoded string.
@param l Number of binary bytes to encode.
@param cse Message digest encoding.
@return Number of text characters produced by encoding.
*/
static
size_t
dk3chksum_conv_length(size_t l, int cse)
{
size_t back = 0;
$? "+ dk3chksum_conv_length %lu %d", (unsigned long)l, cse
switch(cse) {
case DK3_DATA_ENCODING_HEX: {
back = dk3enc_size_bin_to_hex(l);
} break;
default: {
back = dk3enc_size_bin_to_a85(l);
} break;
} $? "- dk3chksum_conv_length %lu", (unsigned long)back
return back;
}
/** Get length of binary message digest.
@param cst Message digest type.
@return Number of binary bytes produced.
*/
static
size_t
dk3chksum_min_length(int cst)
{
size_t back = 0;
switch(cst) {
case DK3_MD_TYPE_MD5: back = 16; break;
case DK3_MD_TYPE_SHA_1: back = 20; break;
case DK3_MD_TYPE_SHA_224: back = 28; break;
case DK3_MD_TYPE_SHA_256: back = 32; break;
case DK3_MD_TYPE_SHA_384: back = 48; break;
case DK3_MD_TYPE_SHA_512: back = 64; break;
case DK3_MD_TYPE_RIPEMD_160: back = 20; break;
}
return back;
}
/** Build binary checksum from file.
@param db Destination buffer.
@param fipo File pointer for read access.
@param cst Checksum type.
@param app Application structure for diagnostics, may be NULL.
@return 1 on success, 0 on error.
*/
static
int
dk3checksum_binary(char *db, FILE *fipo, int cst, dk3_app_t *app)
{
int back = 0;
#if DK3_HAVE_OPENSSL_SHA_H
SHA_CTX sha_ctx; /* SHA-1 context. */
#if DK3_HAVE_SHA224 || DK3_HAVE_SHA256
SHA256_CTX sha256_ctx; /* SHA-256 context. */
#endif
#if DK3_HAVE_SHA384 || DK3_HAVE_SHA512
SHA512_CTX sha512_ctx; /* SHA-512 context. */
#endif
#endif
#if DK3_HAVE_OPENSSL_MD5_H
MD5_CTX md5_ctx; /* MD5 context. */
#endif
#if DK3_HAVE_OPENSSL_RIPEMD_H
RIPEMD160_CTX ripemd160_ctx; /* RIPEMD-160 context. */
#endif
#if DK3_HAVE_OPENSSL_RIPEMD_H || DK3_HAVE_OPENSSL_MD5_H \
|| DK3_HAVE_OPENSSL_SHA_H
char buffer[4096]; /* Buffer for input. */
size_t rb = 0; /* Number of bytes read. */
#endif
switch(cst) {
case DK3_MD_TYPE_MD5: {
#if DK3_HAVE_OPENSSL_MD5_H
MD5_Init(&md5_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
MD5_Update(&md5_ctx, buffer, rb);
}
MD5_Final((unsigned char *)db, &md5_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[0]);
}
#endif
} break;
case DK3_MD_TYPE_SHA_1: {
#if DK3_HAVE_OPENSSL_SHA_H
SHA1_Init(&sha_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
SHA1_Update(&sha_ctx, buffer, rb);
}
SHA1_Final((unsigned char *)db, &sha_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[1]);
}
#endif
} break;
case DK3_MD_TYPE_SHA_224: {
#if DK3_HAVE_OPENSSL_SHA_H && DK3_HAVE_SHA224
SHA224_Init(&sha256_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
SHA224_Update(&sha256_ctx, buffer, rb);
}
SHA224_Final((unsigned char *)db, &sha256_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[2]);
}
#endif
} break;
case DK3_MD_TYPE_SHA_256: {
#if DK3_HAVE_OPENSSL_SHA_H && DK3_HAVE_SHA256
SHA256_Init(&sha256_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
SHA256_Update(&sha256_ctx, buffer, rb);
}
SHA256_Final((unsigned char *)db, &sha256_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[3]);
}
#endif
} break;
case DK3_MD_TYPE_SHA_384: {
#if DK3_HAVE_OPENSSL_SHA_H && DK3_HAVE_SHA384
SHA384_Init(&sha512_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
SHA384_Update(&sha512_ctx, buffer, rb);
}
SHA384_Final((unsigned char *)db, &sha512_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[4]);
}
#endif
} break;
case DK3_MD_TYPE_SHA_512: {
#if DK3_HAVE_OPENSSL_SHA_H && DK3_HAVE_SHA512
SHA512_Init(&sha512_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
SHA512_Update(&sha512_ctx, buffer, rb);
}
SHA512_Final((unsigned char *)db, &sha512_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[5]);
}
#endif
} break;
case DK3_MD_TYPE_RIPEMD_160 : {
#if DK3_HAVE_OPENSSL_RIPEMD_H
RIPEMD160_Init(&ripemd160_ctx);
while((rb = dk3sf_fread_app(buffer,1,sizeof(buffer),fipo,app)) > 0) {
RIPEMD160_Update(&ripemd160_ctx, buffer, rb);
}
RIPEMD160_Final((unsigned char *)db, &ripemd160_ctx);
back = 1;
#else
if(app) {
dk3app_log_i3(app, DK3_LL_ERROR, 156, 157, dk3_checksum_type_names[6]);
}
#endif
} break;
default: {
if(app) {
/* ERROR: Unknown message digest type. */
dk3app_log_i1(app, DK3_LL_ERROR, 158);
}
} break;
}
return back;
}
size_t
dk3checksum_length(int cst, int cse)
{
size_t back;
back = dk3chksum_conv_length(dk3chksum_min_length(cst), cse);
return back;
}
int
dk3checksum_build_app(
char *db, size_t sz, dkChar const *fn, int cst, int cse, dk3_app_t *app
)
{
int back = 0;
size_t minlgt = 0; /* Length of binary message digest. */
size_t convlgt = 0; /* Length of digest converted to text. */
size_t i = 0; /* Used to write zeroes. */
dk3_stat_t stb; /* Test for existance. */
char mybuffer[256]; /* ASCII text version of digest. */
FILE *fipo = NULL; /* Input file. */
if(db) { *db = '\0'; }
if((db) && (sz) && (fn)) {
if((cst > 0) && (cst <= DK3_MD_TYPE_MAX)) {
if((cse >= 0) && (cse <= DK3_DATA_ENCODING_MAX)) {
minlgt = dk3chksum_min_length(cst);
convlgt = dk3chksum_conv_length(minlgt, cse);
if(sz > convlgt) {
for(i = 0; i < convlgt; i++) { db[i] = '-'; } db[convlgt] = '\0';
if(dk3sf_stat_app(&stb, fn, app)) {
if(((stb.ft) & (~(DK3_FT_SYMLINK))) == DK3_FT_REGULAR) {
fipo = dk3sf_fopen_app(fn, kw[0], app);
if(fipo) {
if(dk3checksum_binary(mybuffer,fipo, cst,app))
{
switch(cse) {
case DK3_DATA_ENCODING_HEX: {
back = dk3enc_bin_to_hex_app(db,sz,mybuffer,minlgt,app);
} break;
case DK3_DATA_ENCODING_ASCII85: {
back = dk3enc_bin_to_a85_app(db,sz,mybuffer,minlgt,app);
} break;
case DK3_DATA_ENCODING_REVERSE_ASCII85: {
back = dk3enc_bin_to_ra85_app(db,sz,mybuffer,minlgt,app);
} break;
default: {
/* Illegal encoding type! */
dk3app_log_i1(app, DK3_LL_ERROR, 158);
} break;
}
}
fclose(fipo);
}
} else {
if(app) {
/* ERROR: Checksumming for regular files only .*/
dk3app_log_i1(app, DK3_LL_ERROR, 159);
}
}
}
} else {
if(app) {
/* ERROR: Destination buffer too small */
dk3app_log_i1(app, DK3_LL_ERROR, 38);
}
}
} else {
if(app) {
/* ERROR: Illegal encoding number. */
dk3app_log_i1(app, DK3_LL_ERROR, 158);
}
}
} else {
if(app) {
/* ERROR: Illegal digest type. */
dk3app_log_i1(app, DK3_LL_ERROR, 158);
}
}
}
return back;
}
dkChar const *
dk3checksum_get_type_name(int tp)
{
dkChar const *back = NULL;
if((tp > 0) && (tp <= DK3_MD_TYPE_MAX)) {
back = dk3_checksum_type_names[tp - 1];
}
return back;
}
/* vim: set ai sw=2 : */
|