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aeslib: prevent integer overflow

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AuthenTec devices send 4bpp images, but current code assumes 3bpp for
some reason.

https://bugs.freedesktop.org/show_bug.cgi?id=57426
This commit is contained in:
Vasily Khoruzhick 2012-11-18 11:30:34 +03:00 committed by Bastien Nocera
parent 8c5f2e6434
commit bc497f1b26
1 changed files with 2 additions and 2 deletions
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4
libfprint/aeslib.c
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@ -165,8 +165,8 @@ void aes_assemble_image(unsigned char *input, size_t width, size_t height,
for (column = 0; column < width; column++) {
for (row = 0; row < height; row += 2) {
output[width * row + column] = (*input & 0x07) * 36;
output[width * (row + 1) + column] = ((*input & 0x70) >> 4) * 36;
output[width * row + column] = (*input & 0x0f) * 17;
output[width * (row + 1) + column] = ((*input & 0xf0) >> 4) * 17;
input++;
}
}