(cbc_decrypt): For in-place operation, use overlapping memxor3 and
eliminate a memcpy.

Rev: nettle/cbc.c:1.3

Rev: nettle/cbc.c:1.2

* cbc.c (cbc_encrypt, cbc_decrypt_internal, cbc_decrypt): Use it
for typing the f argument.

Rev: src/nettle/cbc.c:1.10
Rev: src/nettle/cbc.h:1.7

Rev: src/nettle/cbc.c:1.9
Rev: src/nettle/cbc.h:1.6

work by allocating a fix amount of stack and imposing a hard limit on
what can be allocated. Updated all users of alloca.

Rev: src/nettle/bignum-random.c:1.4
Rev: src/nettle/cbc.c:1.8
Rev: src/nettle/dsa-keygen.c:1.7
Rev: src/nettle/hmac.c:1.6
Rev: src/nettle/pkcs1-rsa-md5.c:1.3
Rev: src/nettle/pkcs1-rsa-sha1.c:1.3
Rev: src/nettle/rsa-decrypt.c:1.5
Rev: src/nettle/rsa-encrypt.c:1.8
Rev: src/nettle/sexp.c:1.15

Rev: src/nettle/cbc.c:1.7
Rev: src/nettle/hmac.c:1.5
Rev: src/nettle/knuth-lfib.c:1.3
Rev: src/nettle/md5-compat.c:1.4
Rev: src/nettle/md5-meta.c:1.3
Rev: src/nettle/md5.c:1.7
Rev: src/nettle/memxor.c:1.3
Rev: src/nettle/nettle-internal.c:1.4

config.h.

Rev: src/nettle/ChangeLog:1.195
Rev: src/nettle/aes-decrypt-table.c:1.4
Rev: src/nettle/aes-decrypt.c:1.5
Rev: src/nettle/aes-encrypt-table.c:1.4
Rev: src/nettle/aes-encrypt.c:1.5
Rev: src/nettle/aes-meta.c:1.3
Rev: src/nettle/aes-set-decrypt-key.c:1.2
Rev: src/nettle/aes-set-encrypt-key.c:1.2
Rev: src/nettle/aes.c:1.12
Rev: src/nettle/aesdata.c:1.2
Rev: src/nettle/arcfour-meta.c:1.2
Rev: src/nettle/arcfour.c:1.3
Rev: src/nettle/base16-decode.c:1.2
Rev: src/nettle/base16-encode.c:1.2
Rev: src/nettle/base16-meta.c:1.3
Rev: src/nettle/base64-decode.c:1.5
Rev: src/nettle/base64-encode.c:1.3
Rev: src/nettle/base64-meta.c:1.4
Rev: src/nettle/bignum-random.c:1.3
Rev: src/nettle/bignum.c:1.7
Rev: src/nettle/blowfish.c:1.4
Rev: src/nettle/buffer-init.c:1.3
Rev: src/nettle/buffer.c:1.8
Rev: src/nettle/cast128-meta.c:1.3
Rev: src/nettle/cast128.c:1.4
Rev: src/nettle/cbc.c:1.6
Rev: src/nettle/des-compat.c:1.10
Rev: src/nettle/des.c:1.7
Rev: src/nettle/des3.c:1.2
Rev: src/nettle/dsa-keygen.c:1.6
Rev: src/nettle/dsa-sign.c:1.7
Rev: src/nettle/dsa-verify.c:1.4
Rev: src/nettle/dsa.c:1.5
Rev: src/nettle/examples/io.c:1.4
Rev: src/nettle/examples/nettle-benchmark.c:1.8
Rev: src/nettle/examples/nettle-openssl.c:1.2
Rev: src/nettle/examples/rsa-keygen.c:1.10
Rev: src/nettle/examples/rsa-sign.c:1.5
Rev: src/nettle/examples/rsa-verify.c:1.4
Rev: src/nettle/hmac-md5.c:1.5
Rev: src/nettle/hmac-sha1.c:1.2
Rev: src/nettle/hmac-sha256.c:1.2
Rev: src/nettle/hmac.c:1.4
Rev: src/nettle/knuth-lfib.c:1.2
Rev: src/nettle/md5-compat.c:1.3
Rev: src/nettle/md5-meta.c:1.2
Rev: src/nettle/md5.c:1.6
Rev: src/nettle/memxor.c:1.2
Rev: src/nettle/nettle-internal.c:1.3
Rev: src/nettle/pgp-encode.c:1.4
Rev: src/nettle/pkcs1-rsa-md5.c:1.2
Rev: src/nettle/pkcs1-rsa-sha1.c:1.2
Rev: src/nettle/pkcs1.c:1.2
Rev: src/nettle/realloc.c:1.3
Rev: src/nettle/rsa-compat.c:1.8
Rev: src/nettle/rsa-decrypt.c:1.4
Rev: src/nettle/rsa-encrypt.c:1.5
Rev: src/nettle/rsa-keygen.c:1.5
Rev: src/nettle/rsa-md5-sign.c:1.2
Rev: src/nettle/rsa-md5-verify.c:1.2
Rev: src/nettle/rsa-sha1-sign.c:1.2
Rev: src/nettle/rsa-sha1-verify.c:1.2
Rev: src/nettle/rsa-sign.c:1.3
Rev: src/nettle/rsa-verify.c:1.2
Rev: src/nettle/rsa.c:1.12
Rev: src/nettle/rsa2openpgp.c:1.2
Rev: src/nettle/rsa2sexp.c:1.7
Rev: src/nettle/serpent-meta.c:1.2
Rev: src/nettle/serpent.c:1.4
Rev: src/nettle/sexp-format.c:1.9
Rev: src/nettle/sexp-transport-format.c:1.2
Rev: src/nettle/sexp-transport.c:1.4
Rev: src/nettle/sexp.c:1.14
Rev: src/nettle/sexp2bignum.c:1.5
Rev: src/nettle/sexp2dsa.c:1.4
Rev: src/nettle/sexp2rsa.c:1.11
Rev: src/nettle/sha1-meta.c:1.2
Rev: src/nettle/sha1.c:1.8
Rev: src/nettle/sha256-meta.c:1.2
Rev: src/nettle/sha256.c:1.3
Rev: src/nettle/tools/input.c:1.2
Rev: src/nettle/tools/misc.c:1.2
Rev: src/nettle/tools/output.c:1.3
Rev: src/nettle/tools/parse.c:1.2
Rev: src/nettle/tools/sexp-conv.c:1.14
Rev: src/nettle/twofish-meta.c:1.2
Rev: src/nettle/twofish.c:1.6
Rev: src/nettle/yarrow256.c:1.17
Rev: src/nettle/yarrow_key_event.c:1.4

procesing and requiring that src != dst.
(cbc_decrypt): Use cbc_decrypt_internal. If src == dst, use a
buffer of limited size to copy the ciphertext.

Rev: src/nettle/cbc.c:1.5

iv.

Rev: src/nettle/cbc.c:1.4

Rev: src/nettle/ChangeLog:1.17
Rev: src/nettle/cbc.c:1.3

Rev: src/nettle/Makefile.am:1.12
Rev: src/nettle/cbc.c:1.2
Rev: src/nettle/cbc.h:1.2

Rev: src/nettle/cbc.c:1.1
Rev: src/nettle/cbc.h:1.1