GmSSL/crypto/sms4/README.md

SMS4 Sub-Library of GMSSL

Encryption modes:

• ECB: encrypt or decrypt a block, process only one block per call.
• CBC: process variable length input with zero padding, IV works as both input and output.
• CFB: same as CBC
• OFB: same as CBC

Optimization for specific architecture:

• AVX2: support ECB, CTR and CBC-decrypt (todo)
• KNC-NI: support ECB, CTR and CBC-decrypt (todo)

Some future plans:

• more operation modes, GCM, XTS, FFX, OFB ...
• more optimiazations: ARM/NEON, X86 ASM, GPU, ...
• secure implementation: Bit Slicing, Timing attack ...
• formally verified.