diff options
Diffstat (limited to 'src/Common/libzip/zip_source_pkware.c')
| -rw-r--r-- | src/Common/libzip/zip_source_pkware.c | 141 |
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 @@ -19,3 +19,3 @@ written permission. - + THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS @@ -44,13 +44,11 @@ struct trad_pkware { -#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 *); @@ -59,5 +57,3 @@ 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; @@ -74,3 +70,3 @@ zip_source_pkware(zip_t *za, zip_source_t *src, - 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); @@ -86,3 +82,3 @@ zip_source_pkware(zip_t *za, zip_source_t *src, - 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); @@ -96,5 +92,3 @@ 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; @@ -103,3 +97,3 @@ decrypt(struct trad_pkware *ctx, zip_uint8_t *out, const zip_uint8_t *in, - for (i=0; i<len; i++) { + for (i = 0; i < len; i++) { b = in[i]; @@ -127,4 +121,3 @@ 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]; @@ -134,9 +127,9 @@ decrypt_header(zip_source_t *src, struct trad_pkware *ctx) - 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; @@ -153,4 +146,4 @@ decrypt_header(zip_source_t *src, struct trad_pkware *ctx) - 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; @@ -163,5 +156,3 @@ 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; @@ -172,47 +163,46 @@ pkware_decrypt(zip_source_t *src, void *ud, void *data, 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; } @@ -222,4 +212,3 @@ pkware_decrypt(zip_source_t *src, void *ud, void *data, static void -pkware_free(struct trad_pkware *ctx) -{ +pkware_free(struct trad_pkware *ctx) { free(ctx); |