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GB/T 32905-2016 PDF English

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GB/T 32905-2016: Information security techniques - SM3 cryptographic hash algorithm
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GB/T 32905-2016245 Add to Cart Auto, 9 seconds. Information security techniques - SM3 cryptographic hash algorithm Valid

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GB/T 32905-2016: Information security techniques - SM3 cryptographic hash algorithm

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 35.040 L 80 Information security techniques - SM3 cryptographic hash algorithm Issued on. AUGUST 29, 2016 Implemented on. MARCH 01, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China.

Table of Contents

Foreword... 3 1 Scope... 4 2 Terms and definitions... 4 3 Symbols... 5 4 Constants and functions... 5 5 Algorithm description... 6 Appendix A (Informative) Calculation examples... 9

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by State Cryptography Administration. This Standard shall be under the jurisdiction of National Information Security Standardization Technical Committee (SAC/TC 260). The drafting organizations of this Standard. Tsinghua University, Commercial Cryptography Testing Center of State Cryptography Administration, PLA Information Engineering University, Data Assurance & Communications Security Center, Chinese Academy of Sciences. The drafters of this Standard. Wang Xiaoyun, Li Zheng, Wang Yongchuan, Yu Hongbo, Xie Yongquan, Zhang Chao, Luo Peng, Lv Shuwang. Information security techniques - SM3 cryptographic hash algorithm

1 Scope

This Standard specifies the calculation method and calculation steps of SM3 cryptographic hash algorithm, and gives examples of calculations. This Standard applies to digital signature and verification in commercial cryptographic applications, the generation and verification of message authentication codes, and the generation of random numbers. It can meet the security requirements of a variety of cryptographic applications.

2 Terms and definitions

The following terms and definitions are applicable to this document. 2.1 Bit string A sequence of binary digits that has the value of 0 or 1. 2.2 Big-endian A representation format of data in memory, which stipulates that the left side is the most significant bit and the right side is the least significant bit. That is, the high-order byte of the number is placed at the low address of the memory, and the low-order byte of the number is placed at the high address of the memory. 2.4 Hash value The output message digest (bit string) when the hash algorithm is applied to a message. 2.5 Word A group (string) whose length is 32 bits.

3 Symbols

The following symbols apply to this document. ABCDEFGH. 8 word registers or concatenation of their values

4 Constants and functions

4.1 Initial value 4.2 Constant 4.4 Permutation function Where X is a word.

5 Algorithm description

5.1 Overview The input of SM3 cryptographic hash algorithm is a message m whose length is l (l< 264) bits. After filling and iterative compression, a hash value is generated. The output length of the hash value is 256 bits. See Appendix A for calculation examples. 5.2 Filling Assuming that the length of the message m is l bits, first add the bit “l” to the end of the message; then, add k “0”s. 5.3 Iterative compression 5.3.1 Iterative process Group the filled message m’ according to 512 bits. m'=B(0)B(1)...B(n-1), where n = (l+k+65)/512.Iterate on m’ in the following way. 5.3.2 Message extension Extend the message group B(i) by the following method to generate 132 message words W0, W1,... W67, W’0, W’1,... W’63, which are used for the compression function CF. 5.4 Output hash value The output 256-bit hash value y = ABCDEFGH.

Appendix A

(Informative) Calculation examples A.1 Example 1 A.1.1 Input hexadecimal data A.1.2 Filled message A.1.3 Extended message A.2 Example 2 A.2.1 512-bit message A.2.4 The second message group A.2.4.1 Extended message A.2.4.2 Iterative compression intermediate value A.2.4.3 Hash value ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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