From 3562e78743202e43aec8727005182a2558117eca Mon Sep 17 00:00:00 2001 From: marha Date: Sun, 28 Jun 2009 22:07:26 +0000 Subject: Checked in the following released items: xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz --- openssl/doc/crypto/EVP_BytesToKey.pod | 67 +++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 openssl/doc/crypto/EVP_BytesToKey.pod (limited to 'openssl/doc/crypto/EVP_BytesToKey.pod') diff --git a/openssl/doc/crypto/EVP_BytesToKey.pod b/openssl/doc/crypto/EVP_BytesToKey.pod new file mode 100644 index 000000000..d375c46e0 --- /dev/null +++ b/openssl/doc/crypto/EVP_BytesToKey.pod @@ -0,0 +1,67 @@ +=pod + +=head1 NAME + +EVP_BytesToKey - password based encryption routine + +=head1 SYNOPSIS + + #include + + int EVP_BytesToKey(const EVP_CIPHER *type,const EVP_MD *md, + const unsigned char *salt, + const unsigned char *data, int datal, int count, + unsigned char *key,unsigned char *iv); + +=head1 DESCRIPTION + +EVP_BytesToKey() derives a key and IV from various parameters. B is +the cipher to derive the key and IV for. B is the message digest to use. +The B paramter is used as a salt in the derivation: it should point to +an 8 byte buffer or NULL if no salt is used. B is a buffer containing +B bytes which is used to derive the keying data. B is the +iteration count to use. The derived key and IV will be written to B +and B respectively. + +=head1 NOTES + +A typical application of this function is to derive keying material for an +encryption algorithm from a password in the B parameter. + +Increasing the B parameter slows down the algorithm which makes it +harder for an attacker to peform a brute force attack using a large number +of candidate passwords. + +If the total key and IV length is less than the digest length and +B is used then the derivation algorithm is compatible with PKCS#5 v1.5 +otherwise a non standard extension is used to derive the extra data. + +Newer applications should use more standard algorithms such as PKCS#5 +v2.0 for key derivation. + +=head1 KEY DERIVATION ALGORITHM + +The key and IV is derived by concatenating D_1, D_2, etc until +enough data is available for the key and IV. D_i is defined as: + + D_i = HASH^count(D_(i-1) || data || salt) + +where || denotes concatentaion, D_0 is empty, HASH is the digest +algorithm in use, HASH^1(data) is simply HASH(data), HASH^2(data) +is HASH(HASH(data)) and so on. + +The initial bytes are used for the key and the subsequent bytes for +the IV. + +=head1 RETURN VALUES + +EVP_BytesToKey() returns the size of the derived key in bytes. + +=head1 SEE ALSO + +L, L, +L + +=head1 HISTORY + +=cut -- cgit v1.2.3