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137 lines
3.2 KiB
137 lines
3.2 KiB
From 0023fce38d3bd6ee0e9b6ff8708fee1195057846 Mon Sep 17 00:00:00 2001
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From: Barry Pollard <barry_pollard@hotmail.com>
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Date: Sun, 22 Sep 2019 21:17:12 +0100
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Subject: [PATCH] http: lowercase headernames for HTTP/2 and HTTP/3
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Closes #4401
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Fixes #4400
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---
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lib/strcase.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++
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lib/strcase.h | 2 ++
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5 files changed, 95 insertions(+), 3 deletions(-)
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diff --git a/lib/strcase.c b/lib/strcase.c
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index 24bcca932..098cec7a8 100644
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--- a/lib/strcase.c
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+++ b/lib/strcase.c
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@@ -93,6 +93,75 @@ char Curl_raw_toupper(char in)
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return in;
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}
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+
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+/* Portable, consistent tolower (remember EBCDIC). Do not use tolower() because
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+ its behavior is altered by the current locale. */
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+char Curl_raw_tolower(char in)
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+{
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+#if !defined(CURL_DOES_CONVERSIONS)
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+ if(in >= 'A' && in <= 'Z')
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+ return (char)('a' + in - 'A');
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+#else
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+ switch(in) {
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+ case 'A':
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+ return 'a';
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+ case 'B':
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+ return 'b';
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+ case 'C':
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+ return 'c';
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+ case 'D':
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+ return 'd';
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+ case 'E':
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+ return 'e';
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+ case 'F':
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+ return 'f';
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+ case 'G':
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+ return 'g';
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+ case 'H':
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+ return 'h';
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+ case 'I':
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+ return 'i';
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+ case 'J':
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+ return 'j';
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+ case 'K':
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+ return 'k';
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+ case 'L':
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+ return 'l';
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+ case 'M':
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+ return 'm';
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+ case 'N':
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+ return 'n';
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+ case 'O':
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+ return 'o';
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+ case 'P':
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+ return 'p';
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+ case 'Q':
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+ return 'q';
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+ case 'R':
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+ return 'r';
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+ case 'S':
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+ return 's';
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+ case 'T':
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+ return 't';
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+ case 'U':
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+ return 'u';
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+ case 'V':
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+ return 'v';
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+ case 'W':
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+ return 'w';
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+ case 'X':
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+ return 'X';
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+ case 'Y':
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+ return 'y';
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+ case 'Z':
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+ return 'z';
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+ }
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+#endif
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+
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+ return in;
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+}
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+
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+
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/*
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* Curl_strcasecompare() is for doing "raw" case insensitive strings. This is
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* meant to be locale independent and only compare strings we know are safe
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@@ -234,6 +303,21 @@ void Curl_strntoupper(char *dest, const char *src, size_t n)
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} while(*src++ && --n);
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}
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+/* Copy a lower case version of the string from src to dest. The
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+ * strings may overlap. No more than n characters of the string are copied
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+ * (including any NUL) and the destination string will NOT be
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+ * NUL-terminated if that limit is reached.
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+ */
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+void Curl_strntolower(char *dest, const char *src, size_t n)
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+{
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+ if(n < 1)
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+ return;
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+
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+ do {
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+ *dest++ = Curl_raw_tolower(*src);
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+ } while(*src++ && --n);
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+}
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+
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/* Compare case-sensitive NUL-terminated strings, taking care of possible
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* null pointers. Return true if arguments match.
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*/
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diff --git a/lib/strcase.h b/lib/strcase.h
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index 6fee3840e..2f07a74c9 100644
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--- a/lib/strcase.h
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+++ b/lib/strcase.h
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@@ -40,12 +40,14 @@ int Curl_safe_strcasecompare(const char *first, const char *second);
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int Curl_strncasecompare(const char *first, const char *second, size_t max);
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char Curl_raw_toupper(char in);
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+char Curl_raw_tolower(char in);
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/* checkprefix() is a shorter version of the above, used when the first
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argument is zero-byte terminated */
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#define checkprefix(a,b) curl_strnequal(a,b,strlen(a))
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void Curl_strntoupper(char *dest, const char *src, size_t n);
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+void Curl_strntolower(char *dest, const char *src, size_t n);
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bool Curl_safecmp(char *a, char *b);
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int Curl_timestrcmp(const char *first, const char *second);
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--
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2.43.0
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