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@ -72,7 +72,7 @@ static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32) |
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0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391, |
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}; |
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#define CORE(i, a, b, c, d) \ |
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#define CORE(i, a, b, c, d) do { \ |
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t = S[i >> 4][i & 3]; \
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a += T[i]; \
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\
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@ -83,10 +83,11 @@ static const uint32_t T[64] = { // T[i]= fabs(sin(i+1)<<32) |
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if (i < 48) a += (b ^ c ^ d) + X[(5 + 3*i) & 15]; \
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else a += (c ^ (b | ~d)) + X[( 7*i) & 15]; \
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} \
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a = b + (( a << t ) | ( a >> (32 - t) )); |
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static void body(uint32_t ABCD[4], uint32_t X[16]){ |
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a = b + (a << t | a >> (32 - t)); \
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} while (0) |
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static void body(uint32_t ABCD[4], uint32_t X[16]) |
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{ |
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int t; |
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int i av_unused; |
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unsigned int a = ABCD[3]; |
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@ -101,13 +102,19 @@ static void body(uint32_t ABCD[4], uint32_t X[16]){ |
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#if CONFIG_SMALL |
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for (i = 0; i < 64; i++) { |
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CORE(i,a,b,c,d) |
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t=d; d=c; c=b; b=a; a=t; |
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CORE(i, a, b, c, d); |
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t = d; |
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d = c; |
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c = b; |
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b = a; |
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a = t; |
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} |
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#else |
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#define CORE2(i) CORE(i,a,b,c,d) CORE((i+1),d,a,b,c) CORE((i+2),c,d,a,b) CORE((i+3),b,c,d,a) |
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#define CORE4(i) CORE2(i) CORE2((i+4)) CORE2((i+8)) CORE2((i+12)) |
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CORE4(0) CORE4(16) CORE4(32) CORE4(48) |
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#define CORE2(i) \ |
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CORE( i, a,b,c,d); CORE((i+1),d,a,b,c); \
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CORE((i+2),c,d,a,b); CORE((i+3),b,c,d,a) |
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#define CORE4(i) CORE2(i); CORE2((i+4)); CORE2((i+8)); CORE2((i+12)) |
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CORE4(0); CORE4(16); CORE4(32); CORE4(48); |
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#endif |
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ABCD[0] += d; |
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@ -116,7 +123,8 @@ CORE4(0) CORE4(16) CORE4(32) CORE4(48) |
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ABCD[3] += a; |
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} |
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void av_md5_init(AVMD5 *ctx){ |
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void av_md5_init(AVMD5 *ctx) |
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{ |
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ctx->len = 0; |
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ctx->ABCD[0] = 0x10325476; |
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@ -125,7 +133,8 @@ void av_md5_init(AVMD5 *ctx){ |
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ctx->ABCD[3] = 0x67452301; |
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} |
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void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){ |
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void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len) |
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{ |
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int i, j; |
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j = ctx->len & 63; |
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@ -133,14 +142,15 @@ void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){ |
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for (i = 0; i < len; i++) { |
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ctx->block[j++] = src[i]; |
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if( 64 == j ){ |
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if (j == 64) { |
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body(ctx->ABCD, (uint32_t *) ctx->block); |
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j = 0; |
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} |
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} |
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} |
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void av_md5_final(AVMD5 *ctx, uint8_t *dst){ |
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void av_md5_final(AVMD5 *ctx, uint8_t *dst) |
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{ |
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int i; |
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uint64_t finalcount = av_le2ne64(ctx->len << 3); |
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@ -154,12 +164,13 @@ void av_md5_final(AVMD5 *ctx, uint8_t *dst){ |
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AV_WL32(dst + 4*i, ctx->ABCD[3 - i]); |
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} |
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void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len){ |
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AVMD5 ctx[1]; |
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void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len) |
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{ |
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AVMD5 ctx; |
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av_md5_init(ctx); |
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av_md5_update(ctx, src, len); |
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av_md5_final(ctx, dst); |
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av_md5_init(&ctx); |
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av_md5_update(&ctx, src, len); |
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av_md5_final(&ctx, dst); |
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} |
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#ifdef TEST |
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@ -179,12 +190,14 @@ int main(void){ |
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int i; |
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uint8_t in[1000]; |
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for(i=0; i<1000; i++) in[i]= i*i; |
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for (i = 0; i < 1000; i++) |
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in[i] = i * i; |
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av_md5_sum(md5val, in, 1000); print_md5(md5val); |
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av_md5_sum(md5val, in, 63); print_md5(md5val); |
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av_md5_sum(md5val, in, 64); print_md5(md5val); |
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av_md5_sum(md5val, in, 65); print_md5(md5val); |
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for(i=0; i<1000; i++) in[i]= i % 127; |
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for (i = 0; i < 1000; i++) |
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in[i] = i % 127; |
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av_md5_sum(md5val, in, 999); print_md5(md5val); |
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return 0; |
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