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6946f40707
Add Base64 encode/decode library, some packages e.g. sysdig can benefit from it Disable parallel make as it races at times make[1]: *** No rule to make target 'libb64.a', needed by 'c-example1'. Stop. Signed-off-by: Khem Raj <raj.khem@gmail.com>
78 lines
3.2 KiB
Diff
78 lines
3.2 KiB
Diff
From 7b30fbc3d47dfaf38d8ce8b8949a69d2984dac76 Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Sat, 27 Mar 2021 22:06:03 -0700
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Subject: [PATCH] fix integer overflows
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Author: Jakub Wilk <jwilk@debian.org>
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Bug: http://sourceforge.net/tracker/?func=detail&aid=3591129&group_id=152942&atid=785907
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Upstream-Status: Pending
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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src/cdecode.c | 15 ++++++++-------
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1 file changed, 8 insertions(+), 7 deletions(-)
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diff --git a/src/cdecode.c b/src/cdecode.c
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index a6c0a42..4e47e9f 100644
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--- a/src/cdecode.c
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+++ b/src/cdecode.c
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@@ -9,10 +9,11 @@ For details, see http://sourceforge.net/projects/libb64
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int base64_decode_value(char value_in)
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{
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- static const char decoding[] = {62,-1,-1,-1,63,52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-2,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51};
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+ static const signed char decoding[] = {62,-1,-1,-1,63,52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-2,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51};
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static const char decoding_size = sizeof(decoding);
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+ if (value_in < 43) return -1;
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value_in -= 43;
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- if (value_in < 0 || value_in >= decoding_size) return -1;
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+ if (value_in > decoding_size) return -1;
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return decoding[(int)value_in];
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}
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@@ -26,7 +27,7 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
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{
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const char* codechar = code_in;
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char* plainchar = plaintext_out;
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- char fragment;
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+ int fragment;
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*plainchar = state_in->plainchar;
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@@ -42,7 +43,7 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
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state_in->plainchar = *plainchar;
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return plainchar - plaintext_out;
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}
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- fragment = (char)base64_decode_value(*codechar++);
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+ fragment = base64_decode_value(*codechar++);
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} while (fragment < 0);
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*plainchar = (fragment & 0x03f) << 2;
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case step_b:
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@@ -53,7 +54,7 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
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state_in->plainchar = *plainchar;
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return plainchar - plaintext_out;
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}
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- fragment = (char)base64_decode_value(*codechar++);
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+ fragment = base64_decode_value(*codechar++);
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} while (fragment < 0);
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*plainchar++ |= (fragment & 0x030) >> 4;
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*plainchar = (fragment & 0x00f) << 4;
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@@ -65,7 +66,7 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
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state_in->plainchar = *plainchar;
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return plainchar - plaintext_out;
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}
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- fragment = (char)base64_decode_value(*codechar++);
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+ fragment = base64_decode_value(*codechar++);
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} while (fragment < 0);
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*plainchar++ |= (fragment & 0x03c) >> 2;
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*plainchar = (fragment & 0x003) << 6;
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@@ -77,7 +78,7 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
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state_in->plainchar = *plainchar;
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return plainchar - plaintext_out;
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}
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- fragment = (char)base64_decode_value(*codechar++);
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+ fragment = base64_decode_value(*codechar++);
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} while (fragment < 0);
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*plainchar++ |= (fragment & 0x03f);
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}
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