174 lines
4.5 KiB
Diff
174 lines
4.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Mon, 1 Oct 2012 13:24:37 -0400
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Subject: [PATCH] Pass "\x[[:hex:]][[:hex:]]" straight through unmolested.
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Don't munge raw spaces when we're doing our cmdline escaping (#923374)
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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grub-core/commands/wildcard.c | 16 +++++++++++++++-
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grub-core/lib/cmdline.c | 25 +++++++++++++++++++++++--
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grub-core/script/execute.c | 43 +++++++++++++++++++++++++++++++++++++------
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3 files changed, 75 insertions(+), 9 deletions(-)
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diff --git a/grub-core/commands/wildcard.c b/grub-core/commands/wildcard.c
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index ed65865050a..5455242c352 100644
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--- a/grub-core/commands/wildcard.c
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+++ b/grub-core/commands/wildcard.c
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@@ -488,6 +488,12 @@ check_file (const char *dir, const char *basename)
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return ctx.found;
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}
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+static int
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+is_hex(char c)
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+{
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+ return ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
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+}
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+
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static void
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unescape (char *out, const char *in, const char *end)
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{
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@@ -496,7 +502,15 @@ unescape (char *out, const char *in, const char *end)
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for (optr = out, iptr = in; iptr < end;)
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{
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- if (*iptr == '\\' && iptr + 1 < end)
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+ if (*iptr == '\\' && iptr + 3 < end && iptr[1] == 'x' && is_hex(iptr[2]) && is_hex(iptr[3]))
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+ {
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+ *optr++ = *iptr++;
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+ *optr++ = *iptr++;
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+ *optr++ = *iptr++;
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+ *optr++ = *iptr++;
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+ continue;
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+ }
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+ else if (*iptr == '\\' && iptr + 1 < end)
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{
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*optr++ = iptr[1];
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iptr += 2;
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diff --git a/grub-core/lib/cmdline.c b/grub-core/lib/cmdline.c
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index ed0b149dca5..8e2294d8ff6 100644
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--- a/grub-core/lib/cmdline.c
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+++ b/grub-core/lib/cmdline.c
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@@ -20,6 +20,12 @@
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#include <grub/lib/cmdline.h>
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#include <grub/misc.h>
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+static int
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+is_hex(char c)
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+{
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+ return ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
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+}
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+
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static unsigned int check_arg (char *c, int *has_space)
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{
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int space = 0;
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@@ -27,7 +33,13 @@ static unsigned int check_arg (char *c, int *has_space)
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while (*c)
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{
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- if (*c == '\\' || *c == '\'' || *c == '"')
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+ if (*c == '\\' && *(c+1) == 'x' && is_hex(*(c+2)) && is_hex(*(c+3)))
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+ {
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+ size += 4;
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+ c += 4;
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+ continue;
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+ }
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+ else if (*c == '\\' || *c == '\'' || *c == '"')
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size++;
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else if (*c == ' ')
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space = 1;
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@@ -86,7 +98,16 @@ grub_create_loader_cmdline (int argc, char *argv[], char *buf,
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while (*c)
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{
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- if (*c == '\\' || *c == '\'' || *c == '"')
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+ if (*c == '\\' && *(c+1) == 'x' &&
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+ is_hex(*(c+2)) && is_hex(*(c+3)))
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+ {
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+ *buf++ = *c++;
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+ *buf++ = *c++;
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+ *buf++ = *c++;
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+ *buf++ = *c++;
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+ continue;
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+ }
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+ else if (*c == '\\' || *c == '\'' || *c == '"')
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*buf++ = '\\';
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*buf++ = *c;
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diff --git a/grub-core/script/execute.c b/grub-core/script/execute.c
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index dab8fd2aeb0..c19b4bf700e 100644
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--- a/grub-core/script/execute.c
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+++ b/grub-core/script/execute.c
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@@ -56,6 +56,12 @@ static struct grub_script_scope *scope = 0;
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/* Wildcard translator for GRUB script. */
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struct grub_script_wildcard_translator *grub_wildcard_translator;
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+static int
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+is_hex(char c)
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+{
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+ return ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
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+}
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+
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static char*
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wildcard_escape (const char *s)
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{
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@@ -72,7 +78,15 @@ wildcard_escape (const char *s)
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i = 0;
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while ((ch = *s++))
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{
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- if (ch == '*' || ch == '\\' || ch == '?')
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+ if (ch == '\\' && s[0] == 'x' && is_hex(s[1]) && is_hex(s[2]))
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+ {
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+ p[i++] = ch;
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+ p[i++] = *s++;
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+ p[i++] = *s++;
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+ p[i++] = *s++;
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+ continue;
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+ }
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+ else if (ch == '*' || ch == '\\' || ch == '?')
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p[i++] = '\\';
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p[i++] = ch;
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}
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@@ -96,7 +110,14 @@ wildcard_unescape (const char *s)
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i = 0;
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while ((ch = *s++))
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{
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- if (ch == '\\')
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+ if (ch == '\\' && s[0] == 'x' && is_hex(s[1]) && is_hex(s[2]))
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+ {
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+ p[i++] = '\\';
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+ p[i++] = *s++;
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+ p[i++] = *s++;
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+ p[i++] = *s++;
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+ }
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+ else if (ch == '\\')
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p[i++] = *s++;
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else
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p[i++] = ch;
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@@ -398,10 +419,20 @@ parse_string (const char *str,
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switch (*ptr)
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{
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case '\\':
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- escaped = !escaped;
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- if (!escaped && put)
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- *(put++) = '\\';
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- ptr++;
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+ if (!escaped && put && *(ptr+1) == 'x' && is_hex(*(ptr+2)) && is_hex(*(ptr+3)))
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+ {
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+ *(put++) = *ptr++;
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+ *(put++) = *ptr++;
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+ *(put++) = *ptr++;
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+ *(put++) = *ptr++;
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+ }
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+ else
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+ {
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+ escaped = !escaped;
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+ if (!escaped && put)
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+ *(put++) = '\\';
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+ ptr++;
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+ }
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break;
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case '$':
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if (escaped)
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