crypto:strong_rand_bytes/1 fails with low_entropy in containerized environments

[jax-cn]

Description

The application crashes with a low_entropy error when calling crypto:strong_rand_bytes/1 during HTTP signature generation, particularly in containerized or virtualized environments.

Error Details

Error: low_entropy

Stack trace:
crypto:strong_rand_bytes/1 [crypto.erl:1992]
rsa_pss:sign/3 [/home/hb/HyperBEAM_SGLang/src/rsa_pss.erl:44]
dev_codec_httpsig:commit/3 [/home/hb/HyperBEAM_SGLang/src/dev_codec_httpsig.erl:168]
dev_message:commit/3 [/home/hb/HyperBEAM_SGLang/src/dev_message.erl:269]
hb_message:commit/3 [/home/hb/HyperBEAM_SGLang/src/hb_message.erl:341]

Environment

• OS: Ubuntu
• Erlang/OTP Version: 27
• branch: edge

Root Cause

The system's entropy pool is insufficient for crypto:strong_rand_bytes/1, which requires high-quality randomness from /dev/random. This commonly occurs in:

• Virtual machines with limited entropy sources
• Container environments without hardware RNG access
• Systems under high cryptographic load