Hello. After upgrading an i386 I can no longer login via ssh using the
key I normally use. The server says in authlog:

May  8 08:44:13 rev sshd[18843]: error: buffer_get_bignum2_ret: bignum is too 
large [preauth]
May  8 08:44:13 rev sshd[18843]: error: key_from_blob: can't read rsa key 
[preauth]
May  8 08:44:13 rev sshd[18843]: error: userauth_pubkey: cannot decode key: 
ssh-rsa [preauth]

The only thing not being quite common is the key, which has more bits than
the default. If I remember correctly I generated it with ssh-keygen -b 16384.

Any ideas what to do about this?

Eivind


OpenBSD 5.5-current (GENERIC) #70: Thu May  1 12:10:13 MDT 2014
    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Celeron(R) M processor 1400MHz ("GenuineIntel" 686-class) 1.40 
GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE,PERF
real mem  = 233205760 (222MB)
avail mem = 216981504 (206MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 08/18/04, BIOS32 rev. 0 @ 0xfd740, SMBIOS 
rev. 2.31 @ 0xdf010 (28 entries)
bios0: vendor Hewlett-Packard version "F.10" date 08/18/2004
bios0: Hewlett-Packard hp pavilion ze4900 (PJ943EA#ABN)
acpi0 at bios0: rev 0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP BOOT SSDT
acpi0: wakeup devices BAT0(S3) LAN_(S5) PS2K(S3) PSM1(S3) PSM2(S3) USB0(S3) 
USB1(S3) USB7(S3)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 2 (PCIB)
acpiec0 at acpi0
acpicpu0 at acpi0: C2, C1
acpitz0 at acpi0: critical temperature is 95 degC
acpiac0 at acpi0: AC unit online
acpibat0 at acpi0: BAT0 model "JM-6" serial 185 type LION oem "Hewlett-Packard"
acpibtn0 at acpi0: LID0
acpibtn1 at acpi0: PWRB
acpivideo0 at acpi0: GFX0
bios0: ROM list: 0xc0000/0xcc00! 0xcd000/0x1000 0xdf000/0x1000! 0xe0000/0x4000!
cpu0 at mainbus0: (uniprocessor)
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82855GM Host" rev 0x02
"Intel 82855GM Memory" rev 0x02 at pci0 dev 0 function 1 not configured
"Intel 82855GM Config" rev 0x02 at pci0 dev 0 function 3 not configured
vga1 at pci0 dev 2 function 0 "Intel 82855GM Video" rev 0x02
intagp0 at vga1
agp0 at intagp0: aperture at 0xe8000000, size 0x8000000
inteldrm0 at vga1
drm0 at inteldrm0
inteldrm0: 1024x768
wsdisplay0 at vga1 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
"Intel 82855GM Video" rev 0x02 at pci0 dev 2 function 1 not configured
uhci0 at pci0 dev 29 function 0 "Intel 82801DB USB" rev 0x03: irq 10
uhci1 at pci0 dev 29 function 1 "Intel 82801DB USB" rev 0x03: irq 11
uhci2 at pci0 dev 29 function 2 "Intel 82801DB USB" rev 0x03: irq 11
ehci0 at pci0 dev 29 function 7 "Intel 82801DB USB" rev 0x03: irq 11
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb0 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x83
pci1 at ppb0 bus 2
rl0 at pci1 dev 0 function 0 "Realtek 8139" rev 0x10: irq 10, address 
00:c0:9f:50:32:6a
rlphy0 at rl0 phy 0: RTL internal PHY
cbb0 at pci1 dev 5 function 0 "TI PCI1410 CardBus" rev 0x02: irq 11, CardBus 
support disabled
cardslot0 at cbb0 slot 0 flags 0
pcmcia0 at cardslot0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801DBM LPC" rev 0x03
pciide0 at pci0 dev 31 function 1 "Intel 82801DBM IDE" rev 0x03: DMA, channel 0 
configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <FUJITSU MHT2060AT>
wd0: 16-sector PIO, LBA, 57231MB, 117210240 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
atapiscsi0 at pciide0 channel 1 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <PHILIPS, CDRW/DVD CDD5263, UH89> ATAPI 5/cdrom 
removable
cd0(pciide0:1:0): using PIO mode 4, DMA mode 2
ichiic0 at pci0 dev 31 function 3 "Intel 82801DB SMBus" rev 0x03: irq 5
iic0 at ichiic0
spdmem0 at iic0 addr 0x51: 256MB DDR SDRAM non-parity PC2700CL2.5
auich0 at pci0 dev 31 function 5 "Intel 82801DB AC97" rev 0x03: irq 5, ICH4 AC97
ac97: codec id 0x43585430 (Conexant CXT48)
ac97: codec features reserved, headphone, 18 bit DAC, 18 bit ADC, No 3D Stereo
audio0 at auich0
"Intel 82801DB Modem" rev 0x03 at pci0 dev 31 function 6 not configured
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at ichpcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pms0: Synaptics touchpad, firmware 5.9
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on wd0a (7dfb6d6dc3559ddf.a) swap on wd0b dump on wd0b
umass0 at uhub0 port 2 configuration 1 interface 0 "USB Flash Disk" rev 
2.00/11.00 addr 2
umass0: using SCSI over Bulk-Only
scsibus4 at umass0: 2 targets, initiator 0
sd0 at scsibus4 targ 1 lun 0: <USB, Flash Disk, 1100> SCSI0 0/direct fixed 
serial.090c1000008180000449
sd0: 1912MB, 512 bytes/sector, 3915776 sectors
sd0 detached
scsibus4 detached
umass0 detached
umass0 at uhub0 port 2 configuration 1 interface 0 "USB Flash Disk" rev 
2.00/11.00 addr 2
umass0: using SCSI over Bulk-Only
scsibus4 at umass0: 2 targets, initiator 0
sd0 at scsibus4 targ 1 lun 0: <USB, Flash Disk, 1100> SCSI0 0/direct fixed 
serial.090c1000008180000449
sd0: 1912MB, 512 bytes/sector, 3915776 sectors

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