#809: Bus error doing cipher encryption with OpenSSL
-------------------------------+--------------------------------------------
Reporter: pwil...@… | Owner: lsansone...@…
Type: defect | Status: new
Priority: blocker | Milestone: MacRuby 0.7
Component: MacRuby | Keywords:
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Using the nightly build dated July 21 on Mac OS X 10.6.4, when I try to
apply a cipher encryption to a string, I get either a bus error or an
assertion failure, depending on the length of the string. Here's the
code:
{{{
require 'openssl'
message1 = "Encrypt me." # Generates assertion
failure
message2 = "Encrypt a longer string." # Generates bus error
# Encrypt with 256 bit AES with CBC
cipher = OpenSSL::Cipher::Cipher.new('aes-256-cbc')
cipher.encrypt
# Generate random keys and IVs
cipher.key = cipher.random_key
cipher.iv = cipher.random_iv
# Encrypt the data
encrypted_data = cipher.update(message1)
encrypted_data << cipher.final
}}}
When encrypting the first string (message1), I get this assertion failure:
{{{
Assertion failed: (out_len < RSTRING_LEN(str)), function
ossl_cipher_update, file ossl_cipher.c, line 334.
}}}
When encrypting the second string (message2), I get a bus error with this
stack trace:
{{{
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x0000000100972d60
0x00007fff844c66d8 in AES_cbc_encrypt ()
(gdb) bt
#0 0x00007fff844c66d8 in AES_cbc_encrypt ()
#1 0x00007fff844cabf3 in aes_256_cbc_cipher ()
#2 0x00007fff844a64a4 in EVP_EncryptUpdate ()
#3 0x00007fff844a667f in EVP_CipherUpdate ()
#4 0x0000000103da8d3a in ossl_cipher_update ()
#5 0x00000001001409d9 in rb_vm_dispatch ()
#6 0x0000000103d00950 in ?? ()
#7 0x0000000103d00220 in ?? ()
#8 0x000000010014d688 in rb_vm_run ()
#9 0x00000001000401f0 in ruby_run_node ()
#10 0x0000000100000d28 in main ()
}}}
This code works under both ruby 1.8.7 and ruby 1.9.2(RC1).
--
Ticket URL: <http://www.macruby.org/trac/ticket/809>
MacRuby <http://macruby.org/>
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