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sha: change loop condition to be tighter.

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This makes no change to the way the code functions, but should make
it easier for static analyzers to see the valid range for i

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-10-11 02:42:18 +02:00
parent fac1ccbda1
commit 4e4ae2f82c
1 changed files with 2 additions and 2 deletions
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4
libavutil/sha.c
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@ -210,7 +210,7 @@ static void sha256_transform(uint32_t *state, const uint8_t buffer[64])
a = T1 + T2; a = T1 + T2;
} }
#else #else
for (i = 0; i < 16;) { for (i = 0; i < 16 - 7;) {
ROUND256_0_TO_15(a, b, c, d, e, f, g, h); ROUND256_0_TO_15(a, b, c, d, e, f, g, h);
ROUND256_0_TO_15(h, a, b, c, d, e, f, g); ROUND256_0_TO_15(h, a, b, c, d, e, f, g);
ROUND256_0_TO_15(g, h, a, b, c, d, e, f); ROUND256_0_TO_15(g, h, a, b, c, d, e, f);
@ -221,7 +221,7 @@ static void sha256_transform(uint32_t *state, const uint8_t buffer[64])
ROUND256_0_TO_15(b, c, d, e, f, g, h, a); ROUND256_0_TO_15(b, c, d, e, f, g, h, a);
} }
for (; i < 64;) { for (; i < 64 - 7;) {
ROUND256_16_TO_63(a, b, c, d, e, f, g, h); ROUND256_16_TO_63(a, b, c, d, e, f, g, h);
ROUND256_16_TO_63(h, a, b, c, d, e, f, g); ROUND256_16_TO_63(h, a, b, c, d, e, f, g);
ROUND256_16_TO_63(g, h, a, b, c, d, e, f); ROUND256_16_TO_63(g, h, a, b, c, d, e, f);