(/home/sate/Testcases/c/cve/dovecot-1.2.0/src/lib/sha1.c) |
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| 77 | | | sha1_step(struct sha1_ctxt *ctxt) |
| 78 | | | { |
| 79 | | | uint32_t a, b, c, d, e; |
| 80 | | | size_t t, s; |
| 81 | | | uint32_t tmp; |
| 82 | | | |
| 83 | | | #if !WORDS_BIGENDIAN |
| 84 | | | struct sha1_ctxt tctxt; |
| 85 | | | memmove(&tctxt.m.b8[0], &ctxt->m.b8[0], 64); |
| 86 | | | ctxt->m.b8[0] = tctxt.m.b8[3]; ctxt->m.b8[1] = tctxt.m.b8[2]; |
| 87 | | | ctxt->m.b8[2] = tctxt.m.b8[1]; ctxt->m.b8[3] = tctxt.m.b8[0]; |
| 88 | | | ctxt->m.b8[4] = tctxt.m.b8[7]; ctxt->m.b8[5] = tctxt.m.b8[6]; |
| 89 | | | ctxt->m.b8[6] = tctxt.m.b8[5]; ctxt->m.b8[7] = tctxt.m.b8[4]; |
| 90 | | | ctxt->m.b8[8] = tctxt.m.b8[11]; ctxt->m.b8[9] = tctxt.m.b8[10]; |
| 91 | | | ctxt->m.b8[10] = tctxt.m.b8[9]; ctxt->m.b8[11] = tctxt.m.b8[8]; |
| 92 | | | ctxt->m.b8[12] = tctxt.m.b8[15]; ctxt->m.b8[13] = tctxt.m.b8[14]; |
| 93 | | | ctxt->m.b8[14] = tctxt.m.b8[13]; ctxt->m.b8[15] = tctxt.m.b8[12]; |
| 94 | | | ctxt->m.b8[16] = tctxt.m.b8[19]; ctxt->m.b8[17] = tctxt.m.b8[18]; |
| 95 | | | ctxt->m.b8[18] = tctxt.m.b8[17]; ctxt->m.b8[19] = tctxt.m.b8[16]; |
| 96 | | | ctxt->m.b8[20] = tctxt.m.b8[23]; ctxt->m.b8[21] = tctxt.m.b8[22]; |
| 97 | | | ctxt->m.b8[22] = tctxt.m.b8[21]; ctxt->m.b8[23] = tctxt.m.b8[20]; |
| 98 | | | ctxt->m.b8[24] = tctxt.m.b8[27]; ctxt->m.b8[25] = tctxt.m.b8[26]; |
| 99 | | | ctxt->m.b8[26] = tctxt.m.b8[25]; ctxt->m.b8[27] = tctxt.m.b8[24]; |
| 100 | | | ctxt->m.b8[28] = tctxt.m.b8[31]; ctxt->m.b8[29] = tctxt.m.b8[30]; |
| 101 | | | ctxt->m.b8[30] = tctxt.m.b8[29]; ctxt->m.b8[31] = tctxt.m.b8[28]; |
| 102 | | | ctxt->m.b8[32] = tctxt.m.b8[35]; ctxt->m.b8[33] = tctxt.m.b8[34]; |
| 103 | | | ctxt->m.b8[34] = tctxt.m.b8[33]; ctxt->m.b8[35] = tctxt.m.b8[32]; |
| 104 | | | ctxt->m.b8[36] = tctxt.m.b8[39]; ctxt->m.b8[37] = tctxt.m.b8[38]; |
| 105 | | | ctxt->m.b8[38] = tctxt.m.b8[37]; ctxt->m.b8[39] = tctxt.m.b8[36]; |
| 106 | | | ctxt->m.b8[40] = tctxt.m.b8[43]; ctxt->m.b8[41] = tctxt.m.b8[42]; |
| 107 | | | ctxt->m.b8[42] = tctxt.m.b8[41]; ctxt->m.b8[43] = tctxt.m.b8[40]; |
| 108 | | | ctxt->m.b8[44] = tctxt.m.b8[47]; ctxt->m.b8[45] = tctxt.m.b8[46]; |
| 109 | | | ctxt->m.b8[46] = tctxt.m.b8[45]; ctxt->m.b8[47] = tctxt.m.b8[44]; |
| 110 | | | ctxt->m.b8[48] = tctxt.m.b8[51]; ctxt->m.b8[49] = tctxt.m.b8[50]; |
| 111 | | | ctxt->m.b8[50] = tctxt.m.b8[49]; ctxt->m.b8[51] = tctxt.m.b8[48]; |
| 112 | | | ctxt->m.b8[52] = tctxt.m.b8[55]; ctxt->m.b8[53] = tctxt.m.b8[54]; |
| 113 | | | ctxt->m.b8[54] = tctxt.m.b8[53]; ctxt->m.b8[55] = tctxt.m.b8[52]; |
| 114 | | | ctxt->m.b8[56] = tctxt.m.b8[59]; ctxt->m.b8[57] = tctxt.m.b8[58]; |
| 115 | | | ctxt->m.b8[58] = tctxt.m.b8[57]; ctxt->m.b8[59] = tctxt.m.b8[56]; |
| 116 | | | ctxt->m.b8[60] = tctxt.m.b8[63]; ctxt->m.b8[61] = tctxt.m.b8[62]; |
| 117 | | | ctxt->m.b8[62] = tctxt.m.b8[61]; ctxt->m.b8[63] = tctxt.m.b8[60]; |
| 118 | | | #endif |
| 119 | | | |
| 120 | | | a = H(0); b = H(1); c = H(2); d = H(3); e = H(4); |
| 121 | | | |
| 122 | | | for (t = 0; t < 20; t++) { |
| 123 | | | s = t & 0x0f; |
| 124 | | | if (t >= 16) { |
| 125 | | | W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); |
| 126 | | | } |
| 127 | | | tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t); |
| 128 | | | e = d; d = c; c = S(30, b); b = a; a = tmp; |
| 129 | | | } |
| 130 | | | for (t = 20; t < 40; t++) { |
Useless Assignment
This code assigns the variable the same value it already had. |
|
| 131 | | | s = t & 0x0f; |
| 132 | | | W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); |
| 133 | | | tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t); |
| 134 | | | e = d; d = c; c = S(30, b); b = a; a = tmp; |
| 135 | | | } |
| 136 | | | for (t = 40; t < 60; t++) { |
| 137 | | | s = t & 0x0f; |
| 138 | | | W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); |
| 139 | | | tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t);
x /home/sate/Testcases/c/cve/dovecot-1.2.0/src/lib/sha1.c |
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47 | #define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d))) |
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| 140 | | | e = d; d = c; c = S(30, b); b = a; a = tmp; |
| 141 | | | } |
| 142 | | | for (t = 60; t < 80; t++) { |
| 143 | | | s = t & 0x0f; |
| 144 | | | W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s)); |
| 145 | | | tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t); |
| 146 | | | e = d; d = c; c = S(30, b); b = a; a = tmp; |
| 147 | | | } |
| 148 | | | |
| 149 | | | H(0) = H(0) + a; |
| 150 | | | H(1) = H(1) + b; |
| 151 | | | H(2) = H(2) + c; |
| 152 | | | H(3) = H(3) + d; |
| 153 | | | H(4) = H(4) + e; |
| 154 | | | |
| 155 | | | memset(&ctxt->m.b8[0], 0, 64); |
| 156 | | | } |
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