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參數(shù)資料
| 型號(hào)： | DS1963S |
| 英文描述： | SHA iButton |
| 中文描述： | SHA iButton |
| 文件頁數(shù)： | 24/37頁 |
| 文件大小： | 349K |
| 代理商： | DS1963S |
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DS1963S
24 of 37
The sequence Kt (0 t 79) is defined as follows:
Kt
:=
5A827999h
6ED9EBA1h (20 t 39)
8F1BBCDCh (40 t 59)
CA62C1D6h (60 t 79)
(0 t 19)
The variables A, B, C, D, E are initialized as follows:
A
:=
67452301h
B
:=
EFCDAB89h
C
:=
98BADCFEh
D
:=
10325476h
E
:=
C3D2E1F0h
The 160-bit MAC is the concatenation of A, B, C, D, and E after looping through the following set of
computations for t = 0 to 79 (discarding any carry-out):
TMP :=
S5(A) + ft(B,C,D) + Wt + Kt + E
E
:=
D
D
:=
C
C
:=
S30(B)
B
:=
A
A
:=
TMP
The Message Authentication Code is loaded into the scratchpad of the DS1963S in two different ways,
depending on the selected SHA function. With Compute First Secret and Compute Next Secret 64 bits of
the MAC are used in a repeating pattern in order to allow it to be copied to any of the eight secrets. With
all other SHA functions the full 160-bit result is loaded into the scratchpad. Table 4 shows the placement
of bytes in the scratchpad.
SHA-1 Output Message Formats
Table 4
Partial Code (Compute First Secret and Compute Next Secret only)
(SP+0) := E[7:0]
(SP+1) := E[15:8]
(SP+4) := D[7:0]
(SP+5) := D[15:8]
(SP+8) := E[7:0]
(SP+9) := E[15:8]
(SP+12) := D[7:0]
(SP+13) := D[15:8]
(SP+16) := E[7:0]
(SP+17) := E[15:8]
(SP+20) := D[7:0]
(SP+21) := D[15:8]
(SP+24) := E[7:0]
(SP+25) := E[15:8]
(SP+28) := D[7:0]
(SP+29) := D[15:8]
(SP+2) := E[23:16]
(SP+6) := D[23:16]
(SP+10) := E[23:16]
(SP+14) := D[23:16]
(SP+18) := E[23:16]
(SP+22) := D[23:16]
(SP+26) := E[23:16]
(SP+30) := D[23:16]
(SP+3) := E[31:24]
(SP+7) := D[31:24]
(SP+11) := E[31:24]
(SP+15) := D[31:24]
(SP+19) := E[31:24]
(SP+23) := D[31:24]
(SP+27) := E[31:24]
(SP+31) := D[31:24]
Full 160-Bit Code (all other SHA functions)
(SP+8) := E[7:0]
(SP+12) := D[7:0]
(SP+16) := C[7:0]
(SP+20) := B[7:0]
(SP+24) := A[7:0]
(SP+9) := E[15:8]
(SP+13) := D[15:8]
(SP+17) := C[15:8]
(SP+21) := B[15:8]
(SP+25) := A[15:8]
(SP+10) := E[23:16]
(SP+14) := D[23:16]
(SP+18) := C[23:16]
(SP+22) := B[23:16]
(SP+26) := A[23:16]
(SP+11) := E[31:24]
(SP+15) := D[31:24]
(SP+19) := C[31:24]
(SP+23) := B[31:24]
(SP+27) := A[31:24]
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1963S+F5 | 制造商:Maxim Integrated Products 功能描述:SHA IBTN 8SOIC - Rail/Tube |
| DS1963S-F5 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1963S-F5+ | 功能描述:iButton SHA iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1965S-1-F3 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1965S-1-F5 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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