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Accept spaces at end of line/buffer in base64

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This commit is contained in:
Manuel Pégourié-Gonnard 2014-10-15 21:45:39 +02:00
parent 7f4ed67a97
commit 64938c63f0
6 changed files with 118 additions and 5 deletions
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1
ChangeLog
View file

@ -35,6 +35,7 @@ Changes
POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
* POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits
RSA keys.
* Accept spaces at end of line or end of buffer in base64_decode().
= PolarSSL 1.3.8 released 2014-07-11
Security

19
library/base64.c
View file

@ -147,8 +147,21 @@ int base64_decode( unsigned char *dst, size_t *dlen,
uint32_t j, x;
unsigned char *p;
/* First pass: check for validity and get output length */
for( i = n = j = 0; i < slen; i++ )
{
/* Skip spaces before checking for EOL */
x = 0;
while( i < slen && src[i] == ' ' )
{
++i;
++x;
}
/* Spaces at end of buffer are OK */
if( i == slen )
break;
if( ( slen - i ) >= 2 &&
src[i] == '\r' && src[i + 1] == '\n' )
continue;
@ -156,6 +169,10 @@ int base64_decode( unsigned char *dst, size_t *dlen,
if( src[i] == '\n' )
continue;
/* Space inside a line is an error */
if( x != 0 )
return( POLARSSL_ERR_BASE64_INVALID_CHARACTER );
if( src[i] == '=' && ++j > 2 )
return( POLARSSL_ERR_BASE64_INVALID_CHARACTER );
@ -182,7 +199,7 @@ int base64_decode( unsigned char *dst, size_t *dlen,
for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ )
{
if( *src == '\r' || *src == '\n' )
if( *src == '\r' || *src == '\n' || *src == ' ' )
continue;
j -= ( base64_dec_map[*src] == 64 );

4
tests/data_files/server7_all_space.crt
View file

@ -1,7 +1,7 @@
-----BEGIN CERTIFICATE-----
MIIDwjCCAaqgAwIBAgIBEDANBgkqhkiG9w0BAQsFADBIMQswCQYDVQQGEwJOTDER
MA8GA1UEChMIUG9sYXJTU0wxJjAkBgNVBAMTHVBvbGFyU1NMIFRlc3QgSW50ZXJt
ZWRpYXRlIENBMB4XDTEzMDkyNDE2MTIyNFoXDTIzMDkyMjE2MTIyNFowNDELMAkG
ZWRpYXRlIENBMB4XDTEzMDkyNDE2MTIyNFoXDTIzMDkyMjE2MTIyNFowNDELMAk G
A1UEBhMCTkwxETAPBgNVBAoTCFBvbGFyU1NMMRIwEAYDVQQDEwlsb2NhbGhvc3Qw
WTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQcbffp2qXqoZyychmoCRxzrd4Vu96m
47NPBehtEC46aTeXgDnBdf++znABrAtfXBRNQz8ARIeYBmskr22rlKjyo4GVMIGS
@ -37,7 +37,7 @@ uCfGGTWQ6me7Bjan3t0NzoTdDq6IpKTesbaY+/9e2xn8DCrhBKLXQMZFDZqUoLYA
kGPOEGgvlPnIIXAawouxCaNYEh5Uw871YMSPT28rLdFr49dwYOtDg9foA8hDIW2P
d6KXbrZteesvA1nYzEOs+3AjrbT79Md2W8Bz9bqBVNlNOESSqm4kiCJFmslm/6br
Np0MSQd+o22PQ4xRtmP6UsTfU0ueiMpYc8TYYhMbfnfFyo4m707ebcflPbBEN2dg
updQ66cvfCJB0QJt9upafY0lpdV1qUkCAwEAAaOBoDCBnTAdBgNVHQ4EFgQUOHfY
updQ66cvfCJB0QJt9upafY0lpdV1qUkCAwEAAaOBoDCBnTAdBgNVHQ4EFgQUOHf Y
a3ecKHeCi07YG6ke95QWtw4wbgYDVR0jBGcwZYAUnW0gJEkBPyvLeLUZvH4kydv7
NnyhQqRAMD4xCzAJBgNVBAYTAk5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UE
AxMTUG9sYXJzc2wgVGVzdCBFQyBDQYIJAMFD4n5iQ8zoMAwGA1UdEwQFMAMBAf8w

2
tests/data_files/server7_pem_space.crt
View file

@ -1,7 +1,7 @@
-----BEGIN CERTIFICATE-----
MIIDwjCCAaqgAwIBAgIBEDANBgkqhkiG9w0BAQsFADBIMQswCQYDVQQGEwJOTDER
MA8GA1UEChMIUG9sYXJTU0wxJjAkBgNVBAMTHVBvbGFyU1NMIFRlc3QgSW50ZXJt
ZWRpYXRlIENBMB4XDTEzMDkyNDE2MTIyNFoXDTIzMDkyMjE2MTIyNFowNDELMAkG
ZWRpYXRlIENBMB4XDTEzMDkyNDE2MTIyNFoXDTIzMDkyMjE2MTIyNFowNDELMAk G
A1UEBhMCTkwxETAPBgNVBAoTCFBvbGFyU1NMMRIwEAYDVQQDEwlsb2NhbGhvc3Qw
WTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQcbffp2qXqoZyychmoCRxzrd4Vu96m
47NPBehtEC46aTeXgDnBdf++znABrAtfXBRNQz8ARIeYBmskr22rlKjyo4GVMIGS

73
tests/suites/test_suite_base64.data
View file

@ -55,6 +55,78 @@ base64_decode:"zm===":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode (Invalid char after equal signs)
base64_decode:"zm=masd":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode (Space inside string)
base64_decode:"zm masd":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmFy" (no newline nor '\0' at end)
base64_decode_hex_src:"5a6d3976596d4679":"foobar":0
Base64 decode "Zm9vYmFy\n" (LF at end)
base64_decode_hex_src:"5a6d3976596d46790a":"foobar":0
Base64 decode "Zm9vYmFy\r\n" (CRLF at end)
base64_decode_hex_src:"5a6d3976596d46790d0a":"foobar":0
Base64 decode "Zm9vYmFy\r" (CR at end)
base64_decode_hex_src:"5a6d3976596d46790d":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmFy " (SP at end)
base64_decode_hex_src:"5a6d3976596d467920":"foobar":0
Base64 decode "Zm9vYmFy \n" (SP+LF at end)
base64_decode_hex_src:"5a6d3976596d4679200a":"foobar":0
Base64 decode "Zm9vYmFy \r\n" (SP+CRLF at end)
base64_decode_hex_src:"5a6d3976596d4679200d0a":"foobar":0
Base64 decode "Zm9vYmFy \r" (SP+CR at end)
base64_decode_hex_src:"5a6d3976596d4679200d":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmFy " (2SP at end)
base64_decode_hex_src:"5a6d3976596d46792020":"foobar":0
Base64 decode "Zm9vYmFy \n" (2SP+LF at end)
base64_decode_hex_src:"5a6d3976596d467920200a":"foobar":0
Base64 decode "Zm9vYmFy \r\n" (2SP+CRLF at end)
base64_decode_hex_src:"5a6d3976596d467920200d0a":"foobar":0
Base64 decode "Zm9vYmFy \r" (2SP+CR at end)
base64_decode_hex_src:"5a6d3976596d467920200d":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmF\ny" (LF inside)
base64_decode_hex_src:"5a6d3976596d460a79":"foobar":0
Base64 decode "Zm9vYmF\ry" (CRLF inside)
base64_decode_hex_src:"5a6d3976596d460d0a79":"foobar":0
Base64 decode "Zm9vYmF\ry" (CR inside)
base64_decode_hex_src:"5a6d3976596d460d79":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmF y" (SP inside)
base64_decode_hex_src:"5a6d3976596d462079":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmF \ny" (SP+LF inside)
base64_decode_hex_src:"5a6d3976596d46200a79":"foobar":0
Base64 decode "Zm9vYmF \ry" (SP+CRLF inside)
base64_decode_hex_src:"5a6d3976596d46200d0a79":"foobar":0
Base64 decode "Zm9vYmF \ry" (SP+CR inside)
base64_decode_hex_src:"5a6d3976596d46200d79":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmF y" (2SP inside)
base64_decode_hex_src:"5a6d3976596d46202079":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 decode "Zm9vYmF \ny" (2SP+LF inside)
base64_decode_hex_src:"5a6d3976596d4620200a79":"foobar":0
Base64 decode "Zm9vYmF \ry" (2SP+CRLF inside)
base64_decode_hex_src:"5a6d3976596d4620200d0a79":"foobar":0
Base64 decode "Zm9vYmF \ry" (2SP+CR inside)
base64_decode_hex_src:"5a6d3976596d4620200d79":"":POLARSSL_ERR_BASE64_INVALID_CHARACTER
Base64 encode hex #1
base64_encode_hex:"010203040506070809":"AQIDBAUGBwgJ":13:0
@ -85,3 +157,4 @@ base64_decode_hex:"AQIDBAUGBw==":"01020304050607":6:POLARSSL_ERR_BASE64_BUFFER_T
Base64 Selftest
depends_on:POLARSSL_SELF_TEST
base64_selftest:

22
tests/suites/test_suite_base64.function
View file

@ -95,6 +95,28 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE */
void base64_decode_hex_src( char *src_hex, char *dst_ref, int result )
{
unsigned char dst[1000] = { 0 };
unsigned char *src;
size_t src_len, len;
src = unhexify_alloc( src_hex, &src_len );
len = sizeof( dst );
TEST_ASSERT( base64_decode( dst, &len, src, src_len ) == result );
if( result == 0 )
{
TEST_ASSERT( len == strlen( dst_ref ) );
TEST_ASSERT( memcmp( dst, dst_ref, len ) == 0 );
}
exit:
polarssl_free( src );
}
/* END_CASE */
/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */
void base64_selftest()
{