Check BN_new() and RSA_new() return values in generate_key()#184
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Check BN_new() and RSA_new() return values in generate_key()#184toddr-bot wants to merge 1 commit into
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BN_new() can return NULL on memory exhaustion. The subsequent BN_set_word(e, exponent) would dereference NULL — a segfault instead of a clean error. Similarly, on OpenSSL 0.9.8–2.x, RSA_new() was unchecked; failure would pass NULL to RSA_generate_key_ex(). Add CHECK_OPEN_SSL(e) after BN_new(), and an explicit NULL check with cleanup for RSA_new() in the 0.9.8–2.x code path. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
BN_new()— prevents segfault on memory exhaustionRSA_new()in the 0.9.8–2.x code path with proper cleanupWhy
BN_new()returns NULL on allocation failure. Without a check,BN_set_word(NULL, exponent)dereferences a null pointer — a segfaultinstead of a clean croak. Similarly, in the 0.9.8–2.x path,
RSA_new()failure would pass NULL toRSA_generate_key_ex().Every other allocation in RSA.xs is checked (
CHECK_OPEN_SSL,THROW,or explicit
if). These two were the last unchecked allocations ingenerate_key().Testing
straightforward: add checks that match the existing patterns
🤖 Generated with Claude Code