The symbols crypto_alloc_tfm and crypto_free_tfm are part of the Crypto API (/usr/src/linux/crypto/api.c:120).
Since 'zcat /proc/config.gz` resolted in file not found, can you instead post the results of
It almost sounds like you don't have the Cryptographic API enabled.
Finally, your `uname -a` shows you are still running gentoo-sources-2.6.11-r3. We are now at gentoo-sources-2.6.12-r9. As soon as you can get network connection back on this machine you might add that to your "to do" list.