Core RISC-V Support
wolfSSL has no external dependencies and runs on nearly any RISC-V board using standard GNU toolchains.
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Hardware Platforms Supported
A few of the specific boards we currently support:
- Microchip PolarFire SoC (MPFS250)
- SiFive HiFive Unleashed (64-bit)
- SiFive HiFive1 (32-bit E31 RISC-V core at 320MHz with 4MB flash and 16KB RAM)
- Espressif ESP32-C2, ESP32-C3, and ESP32-C6 RISC-V chips
- Radiona ULX3S Softcore with Hazard3 RISC-V (same core used in Raspberry Pi Pico 2)
- Other private label boards are supported as well
Cryptographic Hardware Acceleration
Assembly Optimizations
wolfSSL PR #7569 implemented AES ECB/CBC/CTR/GCM/CCM for RISC-V 64-bit in assembly language, achieving up to 50x performance improvement over software implementations.
Optimized Algorithms (RISC-V 64-bit assembly):
- AES (ECB, CBC, CTR, GCM, CCM modes)
- SHA-256, SHA-512, SHA-3, ChaCha20, and Poly1305
Enable with: ./configure –enable-riscv-asm or macro WOLFSSL_RISCV_ASM
Please contact us at support@wolfssl.com if you have ideas for further optimization! We want to maximize performance for all of the algos we support, including ML-KEM and ML-DSA.
Espressif RISC-V Hardware Acceleration
wolfSSL supports hardware acceleration on ESP32-C2, ESP32-C3, and ESP32-C6 for SHA (hash), RSA (big number math), and AES encryption, achieving up to 10x faster performance than software implementations.
FIPS Certification
wolfSSL offers FIPS 140-3 certifications for RISC-V platforms (NIST Certificate #4718).
wolfBoot Support
The wolfBoot secure bootloader supports RISC-V with boot validation using hash/signature, power-fail-safe firmware updates, rollback support, version checking to prevent downgrade attacks, and support for external flash. Contact us if you need wolfBoot on your specific part.
Configuration
Enable RISC-V support with the macro WOLFSSL_SIFIVE_RISC_V or use the configure option –enable-riscv-asm for assembly optimizations. wolfCrypt supports both RV32 and RV64 architectures with customizable build options through user_settings.h.
If you have questions about any of the above, please contact us at facts@wolfssl.com or call us at +1 425 245 8247.
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