VeraCrypt
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path: root/src/Common/libzip/zip_source_pkware.c
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Diffstat (limited to 'src/Common/libzip/zip_source_pkware.c')
-rw-r--r--src/Common/libzip/zip_source_pkware.c141
1 files changed, 65 insertions, 76 deletions
diff --git a/src/Common/libzip/zip_source_pkware.c b/src/Common/libzip/zip_source_pkware.c
index 3957d993..b466da47 100644
--- a/src/Common/libzip/zip_source_pkware.c
+++ b/src/Common/libzip/zip_source_pkware.c
@@ -17,7 +17,7 @@
3. The names of the authors may not be used to endorse or promote
products derived from this software without specific prior
written permission.
-
+
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -42,24 +42,20 @@ struct trad_pkware {
zip_uint32_t key[3];
};
-#define HEADERLEN 12
-#define KEY0 305419896
-#define KEY1 591751049
-#define KEY2 878082192
+#define HEADERLEN 12
+#define KEY0 305419896
+#define KEY1 591751049
+#define KEY2 878082192
-static void decrypt(struct trad_pkware *, zip_uint8_t *,
- const zip_uint8_t *, zip_uint64_t, int);
+static void decrypt(struct trad_pkware *, zip_uint8_t *, const zip_uint8_t *, zip_uint64_t, int);
static int decrypt_header(zip_source_t *, struct trad_pkware *);
-static zip_int64_t pkware_decrypt(zip_source_t *, void *, void *,
- zip_uint64_t, zip_source_cmd_t);
+static zip_int64_t pkware_decrypt(zip_source_t *, void *, void *, zip_uint64_t, zip_source_cmd_t);
static void pkware_free(struct trad_pkware *);
zip_source_t *
-zip_source_pkware(zip_t *za, zip_source_t *src,
- zip_uint16_t em, int flags, const char *password)
-{
+zip_source_pkware(zip_t *za, zip_source_t *src, zip_uint16_t em, int flags, const char *password) {
struct trad_pkware *ctx;
zip_source_t *s2;
@@ -72,7 +68,7 @@ zip_source_pkware(zip_t *za, zip_source_t *src,
return NULL;
}
- if ((ctx=(struct trad_pkware *)malloc(sizeof(*ctx))) == NULL) {
+ if ((ctx = (struct trad_pkware *)malloc(sizeof(*ctx))) == NULL) {
zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
return NULL;
}
@@ -84,7 +80,7 @@ zip_source_pkware(zip_t *za, zip_source_t *src,
ctx->key[2] = KEY2;
decrypt(ctx, NULL, (const zip_uint8_t *)password, strlen(password), 1);
- if ((s2=zip_source_layered(za, src, pkware_decrypt, ctx)) == NULL) {
+ if ((s2 = zip_source_layered(za, src, pkware_decrypt, ctx)) == NULL) {
pkware_free(ctx);
return NULL;
}
@@ -94,14 +90,12 @@ zip_source_pkware(zip_t *za, zip_source_t *src,
static void
-decrypt(struct trad_pkware *ctx, zip_uint8_t *out, const zip_uint8_t *in,
- zip_uint64_t len, int update_only)
-{
+decrypt(struct trad_pkware *ctx, zip_uint8_t *out, const zip_uint8_t *in, zip_uint64_t len, int update_only) {
zip_uint16_t tmp;
zip_uint64_t i;
Bytef b;
- for (i=0; i<len; i++) {
+ for (i = 0; i < len; i++) {
b = in[i];
if (!update_only) {
@@ -125,20 +119,19 @@ decrypt(struct trad_pkware *ctx, zip_uint8_t *out, const zip_uint8_t *in,
static int
-decrypt_header(zip_source_t *src, struct trad_pkware *ctx)
-{
+decrypt_header(zip_source_t *src, struct trad_pkware *ctx) {
zip_uint8_t header[HEADERLEN];
struct zip_stat st;
zip_int64_t n;
unsigned short dostime, dosdate;
- if ((n=zip_source_read(src, header, HEADERLEN)) < 0) {
- _zip_error_set_from_source(&ctx->error, src);
+ if ((n = zip_source_read(src, header, HEADERLEN)) < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
return -1;
}
-
+
if (n != HEADERLEN) {
- zip_error_set(&ctx->error, ZIP_ER_EOF, 0);
+ zip_error_set(&ctx->error, ZIP_ER_EOF, 0);
return -1;
}
@@ -151,8 +144,8 @@ decrypt_header(zip_source_t *src, struct trad_pkware *ctx)
_zip_u2d_time(st.mtime, &dostime, &dosdate);
- if (header[HEADERLEN-1] != st.crc>>24 && header[HEADERLEN-1] != dostime>>8) {
- zip_error_set(&ctx->error, ZIP_ER_WRONGPASSWD, 0);
+ if (header[HEADERLEN - 1] != st.crc >> 24 && header[HEADERLEN - 1] != dostime >> 8) {
+ zip_error_set(&ctx->error, ZIP_ER_WRONGPASSWD, 0);
return -1;
}
@@ -161,66 +154,62 @@ decrypt_header(zip_source_t *src, struct trad_pkware *ctx)
static zip_int64_t
-pkware_decrypt(zip_source_t *src, void *ud, void *data,
- zip_uint64_t len, zip_source_cmd_t cmd)
-{
+pkware_decrypt(zip_source_t *src, void *ud, void *data, zip_uint64_t len, zip_source_cmd_t cmd) {
struct trad_pkware *ctx;
zip_int64_t n;
ctx = (struct trad_pkware *)ud;
switch (cmd) {
- case ZIP_SOURCE_OPEN:
- if (decrypt_header(src, ctx) < 0)
- return -1;
- return 0;
-
- case ZIP_SOURCE_READ:
- if ((n=zip_source_read(src, data, len)) < 0) {
- _zip_error_set_from_source(&ctx->error, src);
- return -1;
- }
-
- decrypt((struct trad_pkware *)ud, (zip_uint8_t *)data, (zip_uint8_t *)data, (zip_uint64_t)n, 0);
- return n;
-
- case ZIP_SOURCE_CLOSE:
- return 0;
-
- case ZIP_SOURCE_STAT:
- {
- zip_stat_t *st;
-
- st = (zip_stat_t *)data;
-
- st->encryption_method = ZIP_EM_NONE;
- st->valid |= ZIP_STAT_ENCRYPTION_METHOD;
- /* TODO: deduce HEADERLEN from size for uncompressed */
- if (st->valid & ZIP_STAT_COMP_SIZE)
- st->comp_size -= HEADERLEN;
-
- return 0;
- }
-
- case ZIP_SOURCE_SUPPORTS:
- return zip_source_make_command_bitmap(ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, -1);
-
- case ZIP_SOURCE_ERROR:
- return zip_error_to_data(&ctx->error, data, len);
-
- case ZIP_SOURCE_FREE:
- pkware_free(ctx);
- return 0;
-
- default:
- zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
- return -1;
+ case ZIP_SOURCE_OPEN:
+ if (decrypt_header(src, ctx) < 0)
+ return -1;
+ return 0;
+
+ case ZIP_SOURCE_READ:
+ if ((n = zip_source_read(src, data, len)) < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
+ return -1;
+ }
+
+ decrypt((struct trad_pkware *)ud, (zip_uint8_t *)data, (zip_uint8_t *)data, (zip_uint64_t)n, 0);
+ return n;
+
+ case ZIP_SOURCE_CLOSE:
+ return 0;
+
+ case ZIP_SOURCE_STAT: {
+ zip_stat_t *st;
+
+ st = (zip_stat_t *)data;
+
+ st->encryption_method = ZIP_EM_NONE;
+ st->valid |= ZIP_STAT_ENCRYPTION_METHOD;
+ /* TODO: deduce HEADERLEN from size for uncompressed */
+ if (st->valid & ZIP_STAT_COMP_SIZE)
+ st->comp_size -= HEADERLEN;
+
+ return 0;
+ }
+
+ case ZIP_SOURCE_SUPPORTS:
+ return zip_source_make_command_bitmap(ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, -1);
+
+ case ZIP_SOURCE_ERROR:
+ return zip_error_to_data(&ctx->error, data, len);
+
+ case ZIP_SOURCE_FREE:
+ pkware_free(ctx);
+ return 0;
+
+ default:
+ zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
+ return -1;
}
}
static void
-pkware_free(struct trad_pkware *ctx)
-{
+pkware_free(struct trad_pkware *ctx) {
free(ctx);
}