diff options
Diffstat (limited to 'libarchive/archive_read_support_format_mtree.c')
| -rw-r--r-- | libarchive/archive_read_support_format_mtree.c | 116 |
1 files changed, 104 insertions, 12 deletions
diff --git a/libarchive/archive_read_support_format_mtree.c b/libarchive/archive_read_support_format_mtree.c index 332944ac51bf..127706d53b17 100644 --- a/libarchive/archive_read_support_format_mtree.c +++ b/libarchive/archive_read_support_format_mtree.c @@ -51,6 +51,7 @@ __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_mtree.c 2011 #include "archive.h" #include "archive_entry.h" +#include "archive_entry_private.h" #include "archive_private.h" #include "archive_rb.h" #include "archive_read_private.h" @@ -1482,6 +1483,84 @@ parse_device(dev_t *pdev, struct archive *a, char *val) #undef MAX_PACK_ARGS } +static int +parse_hex_nibble(char c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return 10 + c - 'a'; +#if 0 + /* XXX: Is uppercase something we should support? */ + if (c >= 'A' && c <= 'F') + return 10 + c - 'A'; +#endif + + return -1; +} + +static int +parse_digest(struct archive_read *a, struct archive_entry *entry, + const char *digest, int type) +{ + unsigned char digest_buf[64]; + int high, low; + size_t i, j, len; + + switch (type) { + case ARCHIVE_ENTRY_DIGEST_MD5: + len = sizeof(entry->digest.md5); + break; + case ARCHIVE_ENTRY_DIGEST_RMD160: + len = sizeof(entry->digest.rmd160); + break; + case ARCHIVE_ENTRY_DIGEST_SHA1: + len = sizeof(entry->digest.sha1); + break; + case ARCHIVE_ENTRY_DIGEST_SHA256: + len = sizeof(entry->digest.sha256); + break; + case ARCHIVE_ENTRY_DIGEST_SHA384: + len = sizeof(entry->digest.sha384); + break; + case ARCHIVE_ENTRY_DIGEST_SHA512: + len = sizeof(entry->digest.sha512); + break; + default: + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Internal error: Unknown digest type"); + return ARCHIVE_FATAL; + } + + if (len > sizeof(digest_buf)) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Internal error: Digest storage too large"); + return ARCHIVE_FATAL; + } + + len *= 2; + + if (strnlen(digest, len+1) != len) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "incorrect digest length, ignoring"); + return ARCHIVE_WARN; + } + + for (i = 0, j = 0; i < len; i += 2, j++) { + high = parse_hex_nibble(digest[i]); + low = parse_hex_nibble(digest[i+1]); + if (high == -1 || low == -1) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "invalid digest data, ignoring"); + return ARCHIVE_WARN; + } + + digest_buf[j] = high << 4 | low; + } + + return archive_entry_set_digest(entry, type, digest_buf); +} + /* * Parse a single keyword and its value. */ @@ -1580,8 +1659,10 @@ parse_keyword(struct archive_read *a, struct mtree *mtree, } __LA_FALLTHROUGH; case 'm': - if (strcmp(key, "md5") == 0 || strcmp(key, "md5digest") == 0) - break; + if (strcmp(key, "md5") == 0 || strcmp(key, "md5digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_MD5); + } if (strcmp(key, "mode") == 0) { if (val[0] >= '0' && val[0] <= '7') { *parsed_kws |= MTREE_HAS_PERM; @@ -1617,21 +1698,32 @@ parse_keyword(struct archive_read *a, struct mtree *mtree, return r; } if (strcmp(key, "rmd160") == 0 || - strcmp(key, "rmd160digest") == 0) - break; + strcmp(key, "rmd160digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_RMD160); + } __LA_FALLTHROUGH; case 's': - if (strcmp(key, "sha1") == 0 || strcmp(key, "sha1digest") == 0) - break; + if (strcmp(key, "sha1") == 0 || + strcmp(key, "sha1digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_SHA1); + } if (strcmp(key, "sha256") == 0 || - strcmp(key, "sha256digest") == 0) - break; + strcmp(key, "sha256digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_SHA256); + } if (strcmp(key, "sha384") == 0 || - strcmp(key, "sha384digest") == 0) - break; + strcmp(key, "sha384digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_SHA384); + } if (strcmp(key, "sha512") == 0 || - strcmp(key, "sha512digest") == 0) - break; + strcmp(key, "sha512digest") == 0) { + return parse_digest(a, entry, val, + ARCHIVE_ENTRY_DIGEST_SHA512); + } if (strcmp(key, "size") == 0) { archive_entry_set_size(entry, mtree_atol(&val, 10)); break; |