Unittest for blowfish appears to be incorrect.

[verpeteren]

This unittest is failing with ./configure --debug --unit-test -asume-yes

[ RUN      ] Blowfish.Simple
=================================================================
==23129==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffc6e41bf11 at pc 0x0000005fb1e0 bp 0x7ffc6e41acb0 sp 0x7ffc6e41aca8
READ of size 1 at 0x7ffc6e41bf11 thread T0
    #0 0x5fb1df (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x5fb1df)
    #1 0x555edf (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x555edf)
    #2 0x630832 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x630832)
    #3 0x61f900 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x61f900)
    #4 0x60518a (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x60518a)
    #5 0x605fed (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x605fed)
    #6 0x606816 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x606816)
    #7 0x60e900 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x60e900)
    #8 0x62cb32 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x62cb32)
    #9 0x621f50 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x621f50)
    #10 0x60e59a (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x60e59a)
    #11 0x5fba90 (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x5fba90)
    #12 0x5fba5e (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x5fba5e)
    #13 0x7f68126bbb44 (/lib/x86_64-linux-gnu/libc.so.6+0x21b44)
    #14 0x53b9ec (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x53b9ec)

Address 0x7ffc6e41bf11 is located in stack of thread T0 at offset 4465 in frame
    #0 0x555e0f (/data/buildbot/nidium_slave/debian8.2_amd64/libapenetwork_Debug_debian8_2_amd64_master/build/tests/bin/nativenetwork-unittests+0x555e0f)

  This frame has 2 object(s):
    [32, 4200) 'ctx'
    [4464, 4465) 'key' <== Memory access at offset 4465 overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow ??:0 ??
Shadow bytes around the buggy address:
  0x10000dc7b790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b7a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b7b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b7c0: 00 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2
  0x10000dc7b7d0: f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2 f2
=>0x10000dc7b7e0: f2 f2[01]f3 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b7f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b810: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b820: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10000dc7b830: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  ASan internal:           fe
==23129==ABORTING