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base64: reject signed chars

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This commit is contained in:
Frank Denis
2026-03-29 09:22:30 +02:00
parent c8dbc9c926
commit d23bbc58c3
1 changed files with 4 additions and 2 deletions
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src/libsodium/sodium/codecs.c
+4 -2
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@@ -125,8 +125,9 @@ b64_byte_to_char(unsigned int x)
}
static unsigned int
b64_char_to_byte(int c)
b64_char_to_byte(int c_)
{
const unsigned int c = (unsigned char) c_;
const unsigned int x =
(GE(c, 'A') & LE(c, 'Z') & (c - 'A')) |
(GE(c, 'a') & LE(c, 'z') & (c - ('a' - 26))) |
@@ -146,8 +147,9 @@ b64_byte_to_urlsafe_char(unsigned int x)
}
static unsigned int
b64_urlsafe_char_to_byte(int c)
b64_urlsafe_char_to_byte(int c_)
{
const unsigned int c = (unsigned char) c_;
const unsigned x =
(GE(c, 'A') & LE(c, 'Z') & (c - 'A')) |
(GE(c, 'a') & LE(c, 'z') & (c - ('a' - 26))) |