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#
# basic cryptography routines implemented in C
#
Crypt: module
{
PATH: con "$Crypt";
# state held while creating digests
DigestState: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
copy: fn(d: self ref DigestState): ref DigestState;
};
# expanded AES key + state for chaining
AESstate: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
};
# expanded DES key + state for chaining
DESstate: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
};
# expanded IDEA key + state for chaining
IDEAstate: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
};
# expanded RC4 key + encryption state
RC4state: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
};
# expanded Blowfish key + state for chaining
BFstate: adt
{
x: int; # dummy for C compiler for runt.h
# all the state is hidden
};
# digests
sha1: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
sha224: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
sha256: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
sha384: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
sha512: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
md4: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
md5: fn(buf: array of byte, n: int, digest: array of byte, state: ref DigestState):
ref DigestState;
hmac_sha1: fn(data: array of byte, n: int, key: array of byte, digest: array of byte, state: ref DigestState):
ref DigestState;
hmac_md5: fn(data: array of byte, n: int, key: array of byte, digest: array of byte, state: ref DigestState):
ref DigestState;
SHA1dlen: con 20;
SHA224dlen: con 28;
SHA256dlen: con 32;
SHA384dlen: con 48;
SHA512dlen: con 64;
MD5dlen: con 16;
MD4dlen: con 16;
# encryption interfaces
Encrypt: con 0;
Decrypt: con 1;
AESbsize: con 16;
aessetup: fn(key: array of byte, ivec: array of byte): ref AESstate;
aescbc: fn(state: ref AESstate, buf: array of byte, n: int, direction: int);
DESbsize: con 8;
dessetup: fn(key: array of byte, ivec: array of byte): ref DESstate;
desecb: fn(state: ref DESstate, buf: array of byte, n: int, direction: int);
descbc: fn(state: ref DESstate, buf: array of byte, n: int, direction: int);
IDEAbsize: con 8;
ideasetup: fn(key: array of byte, ivec: array of byte): ref IDEAstate;
ideaecb: fn(state: ref IDEAstate, buf: array of byte, n: int, direction: int);
ideacbc: fn(state: ref IDEAstate, buf: array of byte, n: int, direction: int);
BFbsize: con 8;
blowfishsetup: fn(key: array of byte, ivec: array of byte): ref BFstate;
# blowfishecb: fn(state: ref BFstate, buf: array of byte, n: int, direction: int);
blowfishcbc: fn(state: ref BFstate, buf: array of byte, n: int, direction: int);
rc4setup: fn(seed: array of byte): ref RC4state;
rc4: fn(state: ref RC4state, buf: array of byte, n: int);
rc4skip: fn(state: ref RC4state, n: int);
rc4back: fn(state: ref RC4state, n: int);
# create an alpha and p for diffie helman exchanges
dhparams: fn(nbits: int): (ref IPints->IPint, ref IPints->IPint);
# public key
PK: adt
{
pick {
RSA =>
n: ref IPints->IPint; # modulus
ek: ref IPints->IPint; # exp (encryption key)
Elgamal =>
p: ref IPints->IPint; # modulus
alpha: ref IPints->IPint; # generator
key: ref IPints->IPint; # encryption key (alpha**secret mod p)
DSA =>
p: ref IPints->IPint; # modulus
q: ref IPints->IPint; # group order, q divides p-1
alpha: ref IPints->IPint; # group generator
key: ref IPints->IPint; # encryption key (alpha**secret mod p)
}
};
# secret key (private/public key pair)
SK: adt
{
pick {
RSA =>
pk: ref PK.RSA;
dk: ref IPints->IPint; # exp (decryption key)
p: ref IPints->IPint; # q in pkcs
q: ref IPints->IPint; # p in pkcs
# precomputed crt values
kp: ref IPints->IPint; # k mod p-1
kq: ref IPints->IPint; # k mod q-1
c2: ref IPints->IPint; # for converting residues to number
Elgamal =>
pk: ref PK.Elgamal;
secret: ref IPints->IPint; # decryption key
DSA =>
pk: ref PK.DSA;
secret: ref IPints->IPint; # decryption key
}
};
# public key signature
PKsig: adt
{
# could just have list or array of ref IPints->IPint
pick {
RSA =>
n: ref IPints->IPint;
Elgamal =>
r: ref IPints->IPint;
s: ref IPints->IPint;
DSA =>
r: ref IPints->IPint;
s: ref IPints->IPint;
}
};
# RSA keys
rsagen: fn(nlen: int, elen: int, nrep: int): ref SK.RSA;
rsafill: fn(n: ref IPints->IPint, ek: ref IPints->IPint, dk: ref IPints->IPint, p: ref IPints->IPint, q: ref IPints->IPint): ref SK.RSA;
rsadecrypt: fn(k: ref SK.RSA, m: ref IPints->IPint): ref IPints->IPint;
rsaencrypt: fn(k: ref PK.RSA, m: ref IPints->IPint): ref IPints->IPint;
# Elgamal
eggen: fn(nlen: int, nrep: int): ref SK.Elgamal;
# DSA
dsagen: fn(oldpk: ref PK.DSA): ref SK.DSA;
# generic signature functions
genSK: fn(algname: string, length: int): ref SK;
genSKfromPK: fn(pk: ref PK): ref SK;
sign: fn(sk: ref SK, m: ref IPints->IPint): ref PKsig;
verify: fn(pk: ref PK, sig: ref PKsig, m: ref IPints->IPint): int;
sktopk: fn(sk: ref SK): ref PK;
};
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