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base64: Try to avoid static analyzer warning

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Shift right on unsigned char limits the value to 0..63 which is within
bounds for base64_table[]. Anyway, some static analyzers do not seem to
understand that. See if an otherwise unnecessary masking gets rid of
false warnings. (CID 62858)

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2014-12-06 19:03:52 +02:00
parent d84416a2af
commit cdbc0baac6
1 changed files with 5 additions and 3 deletions
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8
src/utils/base64.c
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@ -48,9 +48,11 @@ unsigned char * base64_encode(const unsigned char *src, size_t len,
pos = out; pos = out;
line_len = 0; line_len = 0;
while (end - in >= 3) { while (end - in >= 3) {
*pos++ = base64_table[in[0] >> 2]; *pos++ = base64_table[(in[0] >> 2) & 0x3f];
*pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)]; *pos++ = base64_table[(((in[0] & 0x03) << 4) |
*pos++ = base64_table[((in[1] & 0x0f) << 2) | (in[2] >> 6)]; (in[1] >> 4)) & 0x3f];
*pos++ = base64_table[(((in[1] & 0x0f) << 2) |
(in[2] >> 6)) & 0x3f];
*pos++ = base64_table[in[2] & 0x3f]; *pos++ = base64_table[in[2] & 0x3f];
in += 3; in += 3;
line_len += 4; line_len += 4;