Unit Crypto

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Description

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Ultibo Crypto Interface unit

Constants

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Cipher algorithms CRYPTO_CIPHER_ALG_*

CRYPTO_CIPHER_ALG_NONE = 0;
CRYPTO_CIPHER_ALG_AES = 1;
CRYPTO_CIPHER_ALG_DES = 2;
CRYPTO_CIPHER_ALG_3DES = 3;
CRYPTO_CIPHER_ALG_RC4 = 4;

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Cipher modes CRYPTO_CIPHER_MODE_*

CRYPTO_CIPHER_MODE_ECB = 0;	Electronic Codebook
CRYPTO_CIPHER_MODE_CBC = 1;	Cipher Block Chaining
CRYPTO_CIPHER_MODE_CFB = 2;	Cipher Feedback
CRYPTO_CIPHER_MODE_OFB = 3;	Output Feedback
CRYPTO_CIPHER_MODE_CTR = 4;	Counter
CRYPTO_CIPHER_MODE_CCM = 5;	Counter with CBC-MAC
CRYPTO_CIPHER_MODE_GCM = 5;	Galois/Counter Mode

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Hash algorithms CRYPTO_HASH_ALG_*

CRYPTO_HASH_ALG_NONE = 0;
CRYPTO_HASH_ALG_MD5 = 1;
CRYPTO_HASH_ALG_SHA1 = 2;
CRYPTO_HASH_ALG_SHA256 = 3;
CRYPTO_HASH_ALG_HMAC_MD5 = 4;
CRYPTO_HASH_ALG_HMAC_SHA1 = 5;
CRYPTO_HASH_ALG_HMAC_SHA256 = 6;
CRYPTO_HASH_ALG_SHA384 = 7;
CRYPTO_HASH_ALG_SHA512 = 8;
CRYPTO_HASH_ALG_HMAC_SHA384 = 9;
CRYPTO_HASH_ALG_HMAC_SHA512 = 10;
CRYPTO_HASH_ALG_SHA224 = 11;
CRYPTO_HASH_ALG_HMAC_SHA224 = 12;

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MD5 digest size MD5_DIGEST_*

MD5_DIGEST_SIZE = 16;

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AES block size AES_BLOCK_*

AES_BLOCK_SIZE = 16;

128 bit blocks

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AES key size AES_KEY_*

AES_KEY_SIZE128 = 16;	128 bit keys
AES_KEY_SIZE192 = 24;	192 bit keys
AES_KEY_SIZE256 = 32;	256 bit keys
AES_IV_SIZE = 16;	128 bit initialization vector

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DES block size DES_BLOCK_*

DES_BLOCK_SIZE = 8;

64 bit blocks

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DES key size DES_KEY_*

DES_KEY_SIZE = 8;

64 bit keys

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DES key type DES_KEYTYPE_*

DES_KEYTYPE_ENCRYPT = 0;
DES_KEYTYPE_DECRYPT = 1;
DES_BYTEBIT:array[0..7] of LongWord = (
$80, $40, $20, $10, $08, $04, $02, $01);

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3DES block size DES3_BLOCK_*

DES3_BLOCK_SIZE = 8;

64 bit blocks

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3DES key size DES3_KEY_*

DES3_KEY_SIZE = 24;

192 bit (3 x 64 bit) keys

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SHA1 constants SHA1_*

SHA1_DIGEST_SIZE = 20;
SHA1_K20 = $5A827999;
SHA1_K40 = $6ED9EBA1;
SHA1_K60 = $8F1BBCDC;
SHA1_K80 = $CA62C1D6;

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SHA256 constants SHA256_*

SHA256_DIGEST_SIZE = 32;

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SHA384 constants SHA384_*

SHA384_DIGEST_SIZE = 48;

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SHA512 constants SHA512_*

SHA512_DIGEST_SIZE = 64;

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RSA constants RSA_*

RSA_MODULUS_BYTES_MAX = 512;

4096 bit maximum

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Base64 constants BASE64_*

Base64EncodeTable:String = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

Type definitions

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MD5 digest

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PMD5Digest = ^TMD5Digest;

TMD5Digest = array[0..15] of Byte;

MD5 block

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PMD5Block = ^TMD5Block;

TMD5Block = record

Data:Pointer;
Size:LongWord;
Next:PMD5Block;

MD5 context

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PMD5Context = ^TMD5Context;

TMD5Context = record

Data:array[0..63] of Byte;
Buffer:array[0..3] of LongWord;
Count:QWord;

MD5 byte buffer

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PMD5ByteBuffer = ^TMD5ByteBuffer;

TMD5ByteBuffer = array[0..63] of Byte;

MD5 long buffer

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PMD5LongBuffer = ^TMD5LongBuffer;

TMD5LongBuffer = array[0..15] of LongWord;

AES key

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PAESKey = ^TAESKey;

TAESKey = record

Rounds:LongWord;
EncryptKey:array[0..59] of LongWord;
DecryptKey:array[0..59] of LongWord;

AES context

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PAESContext = ^TAESContext;

TAESContext = record

AESKey:TAESKey;
CBC:array[0..AES_BLOCK_SIZE - 1] of Byte;
CTR:array[0..AES_BLOCK_SIZE - 1] of Byte;

DES key

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PDESKey = ^TDESKey;

TDESKey = array[0..31] of LongWord;

DES context

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PDESContext = ^TDESContext;

TDESContext = record

EncryptKey:TDESKey;
DecryptKey:TDESKey;
CBC:array[0..DES_BLOCK_SIZE - 1] of Byte;

3DES key

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PDES3Key = ^TDES3Key;

TDES3Key = record

EncryptKey:array[0..2] of TDESKey;
DecryptKey:array[0..2] of TDESKey;

3DES context

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PDES3Context = ^TDES3Context;

TDES3Context = record

DES3Key:TDES3Key;
CBC:array[0..DES3_BLOCK_SIZE - 1] of Byte;

RC4 state

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PRC4State = ^TRC4State;

TRC4State = array[0..255] of Byte;

RC4 context

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PRC4Context = ^TRC4Context;

TRC4Context = record

Key:array[0..31] of Byte;
KeySize:LongWord;
Start:LongWord;

SHA1 digest

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PSHA1Digest = ^TSHA1Digest;

TSHA1Digest = array[0..19] of Byte;

SHA1 block

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PSHA1Block = ^TSHA1Block;

TSHA1Block = record

Data:Pointer;
Size:LongWord;
Next:PSHA1Block;

SHA1 context

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PSHA1Context = ^TSHA1Context;

TSHA1Context = record

Data:array[0..63] of Byte;
State:array[0..4] of LongWord;
Count:QWord;

SHA1 byte buffer

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PSHA1ByteBuffer = ^TSHA1ByteBuffer;

TSHA1ByteBuffer = array[0..63] of Byte;

SHA1 long buffer

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PSHA1LongBuffer = ^TSHA1LongBuffer;

TSHA1LongBuffer = array[0..15] of LongWord;

SHA256 digest

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PSHA256Digest = ^TSHA256Digest;

TSHA256Digest = array[0..31] of Byte;

SHA256 block

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PSHA256Block = ^TSHA256Block;

TSHA256Block = record

Data:Pointer;
Size:LongWord;
Next:PSHA256Block;

SHA256 context

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PSHA256Context = ^TSHA256Context;

TSHA256Context = record

Data:array[0..63] of Byte;
State:array[0..7] of LongWord;
Count:QWord;

SHA256 byte buffer

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PSHA256ByteBuffer = ^TSHA256ByteBuffer;

TSHA256ByteBuffer = array[0..63] of Byte;

SHA256 long buffer

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PSHA256LongBuffer = ^TSHA256LongBuffer;

TSHA256LongBuffer = array[0..15] of LongWord;

SHA256 algorithm

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PSHA256_W = ^TSHA256_W;

TSHA256_W = array[0..63] of LongWord;

Note: This is the W array for the SHA256 algorithm

SHA512 digest

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PSHA512Digest = ^TSHA512Digest;

TSHA512Digest = array[0..63] of Byte;

SHA512 block

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PSHA512Block = ^TSHA512Block;

TSHA512Block = record

Data:Pointer;
Size:LongWord;
Next:PSHA512Block;

SHA512 context

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PSHA512Context = ^TSHA512Context;

TSHA512Context = record

Data:array[0..127] of Byte;
State:array[0..7] of QWord;
Count:QWord;

SHA512 byte buffer

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PSHA512ByteBuffer = ^TSHA512ByteBuffer;

TSHA512ByteBuffer = array[0..127] of Byte;

SHA512 algorithm

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PSHA512_W = ^TSHA512_W;

TSHA512_W = array[0..79] of QWord;

Note: This is the W array for the SHA512 algorithm

SHA384 digest

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PSHA384Digest = ^TSHA384Digest;

TSHA384Digest = array[0..47] of Byte;

SHA384 block

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PSHA384Block = PSHA512Block;

TSHA384Block = TSHA512Block;

SHA384 context

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PSHA384Context = PSHA512Context;

TSHA384Context = TSHA512Context;

SHA384 byte buffer

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PSHA384ByteBuffer = PSHA512ByteBuffer;

TSHA384ByteBuffer = TSHA512ByteBuffer;

RSA context

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PRSAContext = ^TRSAContext;

TRSAContext = record

M:PBigInt;	Modulus
E:PBigInt;	Public exponent
D:PBigInt;	Private exponent
P:PBigInt;	p in m = pq
Q:PBigInt;	q in m = pq
DP:PBigInt;	d mod (p-1)
DQ:PBigInt;	d mod (q-1)
QInv:PBigInt;	q^-1 mod p
ModulusLen:Integer;
Context:PBigIntContext;

Get random bytes

TGetRandomBytes = function(Buffer:PByte; Count:Integer):Boolean;

Base64 decode table

TBase64DecodeTable = array[0..255] of Char;

Hash context

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PHashContext = ^THashContext;

THashContext = record

Algorithm:LongWord;
Key:array[0..127] of Byte;
KeySize:LongWord;
case Integer of
0:(MD5:TMD5Context);
1:(SHA1:TSHA1Context);
2:(SHA256:TSHA256Context);
3:(SHA384:TSHA384Context);
4:(SHA512:TSHA512Context);

Cipher context

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PCipherContext = ^TCipherContext;

TCipherContext = record

Algorithm:LongWord;
Mode:LongWord;
case Integer of
0:(RC4:TRC4Context);
1:(DES:TDESContext);
2:(DES3:TDES3Context);
3:(AES:TAESContext);

Public variables

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Crypto specific variables

CryptoGetRandomBytesHandler:TGetRandomBytes;

Function declarations

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Initialization functions

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procedure CryptoInit;

Description: To be documented

Note	None documented

Crypto functions

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function HashCreate(Algorithm:LongWord; Key:Pointer; KeySize:LongWord):PHashContext;

Description: Initialize a hash context based on an algorithm and (if applicable) a key

Note	None documented

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function HashDestroy(Context:PHashContext):Boolean;

Description: Free a hash context allocated by HashCreate

Note	None documented

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function HashReset(Context:PHashContext):Boolean;

Description: Clear and reinitialize an existing hash context using the existing algorithm and key

Note	None documented

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function HashReset(Context:PHashContext; Algorithm:LongWord; Key:Pointer; KeySize:LongWord):Boolean;

Description: Clear and reinitialize an existing hash context using a new algorithm and key

Note	None documented

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function HashUpdate(Context:PHashContext; Data:Pointer; Size:LongWord):Boolean;

Description: Add a block of data to a hash context

Note	None documented

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function HashFinish(Context:PHashContext; Digest:Pointer; Size:LongWord):Boolean;

Description: Finalize a hash context and return the digest (Hash) value

Note	None documented

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function CipherCreate(Algorithm:LongWord; Vector,Key:Pointer; KeySize:LongWord):PCipherContext;

Description: Initialize a cipher context based on an algorithm and a key

Note	For block ciphers an initialization vector can be passed to enable CBC mode

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function CipherCreate(Algorithm,Mode:LongWord; Nonce,Vector,Key:Pointer; VectorSize,KeySize:LongWord):PCipherContext;

Description: Initialize a cipher context based on an algorithm, mode and key

Note	For block ciphers a Nonce or IV can be passed if the selected mode requires it

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function CipherDestroy(Context:PCipherContext):Boolean;

Description: Free a cipher context allocated by CipherCreate

Note	None documented

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function CipherEncrypt(Context:PCipherContext; Plain,Crypt:Pointer; Size:LongWord):Boolean;

Description: Encrypt a block of data using an existing cipher context

Note	None documented

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function CipherDecrypt(Context:PCipherContext; Crypt,Plain:Pointer; Size:LongWord):Boolean;

Description: Decrypt a block of data using an existing cipher context

Note	None documented

MD5 functions

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function MD5DigestData(Data:PMD5Block; Digest:PMD5Digest):Boolean;

Description: Generate a 128 bit MD5 digest (Hash) from the supplied data

Data	Data is a linked list which can contain multiple independent blocks to be included in the hash. The data block itself does not form part of the hash.

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function MD5DigestString(const Value:String; Digest:PMD5Digest):Boolean;

Description: Generate a 128 bit MD5 digest (Hash) from the supplied string value

Note	None documented

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function HMACMD5DigestData(const Key:String; Data:PMD5Block; Digest:PMD5Digest):Boolean;

Description: Generate an MD5 HMAC (Hashed Message Authentication Code) using the Key and Data

Note	None documented

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function HMACMD5DigestData(Key:Pointer; KeySize:LongWord; Data:PMD5Block; Digest:PMD5Digest):Boolean;

Description: Generate an MD5 HMAC (Hashed Message Authentication Code) using the Key and Data

Key	If Key is more than 64 bytes it will be hashed to Key = MD5(Key) instead If Key is less than 64 bytes it will be padded with zeros
Note	The MD5 HMAC algorithm is: MD5(Key xor oPad, MD5(Key xor iPad, Data)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

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function HMACMD5DigestString(const Key,Value:String; Digest:PMD5Digest):Boolean;

Description: Generate an MD5 HMAC (Hashed Message Authentication Code) using the Key and Value

Key	If Key is more than 64 bytes it will be hashed to Key = MD5(Key) instead If Key is less than 64 bytes it will be padded with zeros
Note	The MD5 HMAC algorithm is: MD5(Key xor oPad, MD5(Key xor iPad, Data)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

AES functions

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function AESEncryptData(Key:Pointer; KeySize:LongWord; Vector,Plain,Crypt:Pointer; Size:LongWord):Boolean;

Description: Encrypt a block of data using the AES cipher, if Vector is supplied use CBC mode else use ECB

KeySize	Key size must be 16, 24 or 32 bytes (128, 192 or 256 bits)
Vector	Vector must be 16 bytes (128 bits) long if supplied
Size	Size must be a multiple of 16 bytes long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESDecryptData(Key:Pointer; KeySize:LongWord; Vector,Crypt,Plain:Pointer; Size:LongWord):Boolean;

Description: Decrypt a block of data using the AES cipher, if Vector is supplied use CBC mode else use ECB

KeySize	Key size must be 16, 24 or 32 bytes (128, 192 or 256 bits)
Vector	Vector must be 16 bytes (128 bits) long if supplied
Size	Size must be a multiple of 16 bytes long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESCTREncryptData(Key:Pointer; KeySize:LongWord; Nonce,Plain,Crypt:Pointer; Size:LongWord):Boolean;

Description: Encrypt a block of data with the supplied Key and Nonce using AES CTR mode

KeySize	Key size must be 16, 24 or 32 bytes (128, 192 or 256 bits)
Nonce	Nonce must be 16 bytes (128 bits) long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESCTRDecryptData(Key:Pointer; KeySize:LongWord; Nonce,Crypt,Plain:Pointer; Size:LongWord):Boolean; inline;

Description: Decrypt a block of data with the supplied Key and Nonce using AES CTR mode

KeySize	Key size must be 16, 24 or 32 bytes (128, 192 or 256 bits)
Nonce	Nonce must be 16 bytes (128 bits) long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESGCMEncryptData(Key:Pointer; KeySize:LongWord; IV,AAD,Plain,Crypt:Pointer; IVSize,AADSize,Size:LongWord; Tag:Pointer):Boolean;

Description: Encrypt a block of data with the supplied Key, IV and AAD using AES GCM mode, return the authentication Tag

Tag	Tag must be 16 bytes (128 bits) long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESGCMDecryptData(Key:Pointer; KeySize:LongWord; IV,AAD,Crypt,Plain:Pointer; IVSize,AADSize,Size:LongWord; const Tag:Pointer):Boolean;

Description: Decrypt a block of data with the supplied Key, IV and AAD using AES GCM mode, validate the authentication Tag

Tag	Tag must be 16 bytes (128 bits) long
Note	Plain text and Crypt data pointers must be the same length (and can point to the same value)

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function AESGCMGMAC(Key:Pointer; KeySize:LongWord; IV,AAD:Pointer; IVSize,AADSize:LongWord; Tag:Pointer):Boolean;

Description: Generate the GMAC authentication Tag for a given Key, IV and AAD using AES GCM mode

Tag	Tag must be 16 bytes (128 bits) long

DES functions

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function DESEncryptData(Key:Pointer; KeySize:LongWord; Vector,Plain,Crypt:Pointer; Size:LongWord):Boolean;

Description: To be documented

Note	None documented

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function DESDecryptData(Key:Pointer; KeySize:LongWord; Vector,Crypt,Plain:Pointer; Size:LongWord):Boolean;

Description: To be documented

Note	None documented

3DES functions

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function DES3EncryptData(Key:Pointer; KeySize:LongWord; Vector,Plain,Crypt:Pointer; Size:LongWord):Boolean;

Description: To be documented

Note	None documented

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function DES3DecryptData(Key:Pointer; KeySize:LongWord; Vector,Crypt,Plain:Pointer; Size:LongWord):Boolean;

Description: To be documented

Note	None documented

RC4 functions

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function RC4EncryptData(Key:Pointer; KeySize:LongWord; Plain,Crypt:Pointer; Size,Start:LongWord):Boolean;

Description: Encrypt the supplied data with a key using the RC4 cipher algorithm

Start	Specify how many bytes of the RC4 cipher stream to skip to allow for previous blocks of data or to comply with RFC4345 requirements to discard the first 1536 bytes of the RC4 cipher stream

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function RC4DecryptData(Key:Pointer; KeySize:LongWord; Crypt,Plain:Pointer; Size,Start:LongWord):Boolean; inline;

Description: Encrypt the supplied data with a key using the RC4 cipher algorithm

Note	None documented

SHA1 functions

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function SHA1DigestData(Data:PSHA1Block; Digest:PSHA1Digest):Boolean;

Description: Generate a 160 bit SHA1 digest (Hash) from the supplied data

Data	Data is a linked list which can contain multiple independent blocks to be included in the hash. The data block itself does not form part of the hash.

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function SHA1DigestString(const Value:String; Digest:PSHA1Digest):Boolean;

Description: Generate a 160 bit SHA1 digest (Hash) from the supplied string value

Note	None documented

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function HMACSHA1DigestData(const Key:String; Data:PSHA1Block; Digest:PSHA1Digest):Boolean;

Description: Generate a SHA1 HMAC (Hashed Message Authentication Code) using the Key and Data

Note	None documented

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function HMACSHA1DigestData(Key:Pointer; KeySize:LongWord; Data:PSHA1Block; Digest:PSHA1Digest):Boolean;

Description: Generate a SHA1 HMAC (Hashed Message Authentication Code) using the Key and Data

Key	If Key is more than 64 bytes it will be hashed to Key = SHA1(Key) instead If Key is less than 64 bytes it will be padded with zeros
Note	The SHA1 HMAC algorithm is: SHA1(Key xor oPad, SHA1(Key xor iPad, Data)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

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function HMACSHA1DigestString(const Key,Value:String; Digest:PSHA1Digest):Boolean;

Description: Generate a SHA1 HMAC (Hashed Message Authentication Code) using the Key and Value

Key	If Key is more than 64 bytes it will be hashed to Key = SHA1(Key) instead If Key is less than 64 bytes it will be padded with zeros
Note	The SHA1 HMAC algorithm is: SHA1(Key xor oPad, SHA1(Key xor iPad, Data)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

SHA256 functions

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function SHA256DigestData(Data:PSHA256Block; Digest:PSHA256Digest):Boolean;

Description: Generate a 256 bit SHA256 digest (Hash) from the supplied data

Data	Data is a linked list which can contain multiple independent blocks to be included in the hash. The data block itself does not form part of the hash.

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function SHA256DigestString(const Value:String; Digest:PSHA256Digest):Boolean;

Description: Generate a 256 bit SHA256 digest (Hash) from the supplied string value

Note	None documented

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function HMACSHA256DigestData(const Key:String; Data:PSHA256Block; Digest:PSHA256Digest):Boolean;

Description: Generate a SHA256 HMAC (Hashed Message Authentication Code) using the Key and Data

Note	None documented

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function HMACSHA256DigestData(Key:Pointer; KeySize:LongWord; Data:PSHA256Block; Digest:PSHA256Digest):Boolean;

Description: Generate a SHA256 HMAC (Hashed Message Authentication Code) using the Key and Data

Key	If Key is more than 64 bytes it will be hashed to Key = SHA256(Key) instead If Key is less than 64 bytes it will be padded with zeros.
Note	The SHA256 HMAC algorithm is: SHA256(Key xor oPad, SHA256(Key xor iPad, Value)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

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function HMACSHA256DigestString(const Key,Value:String; Digest:PSHA256Digest):Boolean;

Description: Generate a SHA256 HMAC (Hashed Message Authentication Code) using the Key and Value

Key	If Key is more than 64 bytes it will be hashed to Key = SHA256(Key) instead If Key is less than 64 bytes it will be padded with zeros.
Note	The SHA256 HMAC algorithm is: SHA256(Key xor oPad, SHA256(Key xor iPad, Value)) Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times.

SHA384 functions

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function SHA384DigestData(Data:PSHA384Block; Digest:PSHA384Digest):Boolean;

Description: Generate a 384 bit SHA384 digest (Hash) from the supplied data

Data	Data is a linked list which can contain multiple independent blocks to be included in the hash. The data block itself does not form part of the hash.

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function SHA384DigestString(const Value:String; Digest:PSHA384Digest):Boolean;

Description: Generate a 384 bit SHA384 digest (Hash) from the supplied string value

Note	None documented

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function HMACSHA384DigestData(const Key:String; Data:PSHA384Block; Digest:PSHA384Digest):Boolean;

Description: Generate a SHA384 HMAC (Hashed Message Authentication Code) using the Key and Data

Note	None documented

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function HMACSHA384DigestData(Key:Pointer; KeySize:LongWord; Data:PSHA384Block; Digest:PSHA384Digest):Boolean;

Description: Generate a SHA384 HMAC (Hashed Message Authentication Code) using the Key and Data

Key	If Key is more than 128 bytes it will be hashed to Key = SHA384(Key) instead If Key is less than 128 bytes it will be padded with zeros
Note	The SHA384 HMAC algorithm is: SHA384(Key xor oPad, SHA384(Key xor iPad, Data)) Where iPad is the byte $36 repeated 128 times, oPad is the byte $5c repeated 128 times.

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function HMACSHA384DigestString(const Key,Value:String; Digest:PSHA384Digest):Boolean;

Description: Generate a SHA384 HMAC (Hashed Message Authentication Code) using the Key and Value

Note	None documented

SHA512 functions

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function SHA512DigestData(Data:PSHA512Block; Digest:PSHA512Digest):Boolean;

Description: Generate a 512 bit SHA512 digest (Hash) from the supplied data

Data	Data is a linked list which can contain multiple independent blocks to be included in the hash. The data block itself does not form part of the hash.

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function SHA512DigestString(const Value:String; Digest:PSHA512Digest):Boolean;

Description: Generate a 512 bit SHA512 digest (Hash) from the supplied string value

Note	None documented

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function HMACSHA512DigestData(const Key:String; Data:PSHA512Block; Digest:PSHA512Digest):Boolean;

Description: Generate a SHA512 HMAC (Hashed Message Authentication Code) using the Key and Data

Note	None documented

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function HMACSHA512DigestData(Key:Pointer; KeySize:LongWord; Data:PSHA512Block; Digest:PSHA512Digest):Boolean;

Description: Generate a SHA512 HMAC (Hashed Message Authentication Code) using the Key and Data

Key	If Key is more than 128 bytes it will be hashed to Key = SHA512(Key) instead If Key is less than 128 bytes it will be padded with zeros
Note	The SHA512 HMAC algorithm is: SHA512(Key xor oPad, SHA384(Key xor iPad, Data)) Where iPad is the byte $36 repeated 128 times, oPad is the byte $5c repeated 128 times.

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function HMACSHA512DigestString(const Key,Value:String; Digest:PSHA512Digest):Boolean;

Description: Generate a SHA512 HMAC (Hashed Message Authentication Code) using the Key and Value

Note	None documented

RSA functions

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function RSAInitPrivateKey(Modulus,PublicExp,PrivateExp,P,Q,DP,DQ,QInv:PByte; ModulusLen,PublicExpLen,PrivateExpLen,PLen,QLen,DPLen,DQLen,QInvLen:Integer):PRSAContext;

Description: To be documented

Note	None documented

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function RSAInitPublicKey(Modulus,PublicExp:PByte; ModulusLen,PublicExpLen:Integer):PRSAContext;

Description: To be documented

Note	None documented

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function RSAFreeKey(Context:PRSAContext):Boolean;

Description: Free an RSA context containing Private and/or Public keys

Note	None documented

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function RSAEncryptSign(Context:PRSAContext; const Input:PByte; Len:Integer; Output:PByte; Sign:Boolean):Integer;

Description: Perform PKCS1.5 Encryption or Signing

Context	The RSA context containing Private and/or Public keys
Input	The data to be encrypted
Len	The size of the input data in bytes (Must be <= Modulus length - 11 to make the padding at least 8 bytes as recommended by RFC2313)
Output	The buffer for the encrypted result (Must always be Modulus length)
Sign	If true then sign instead of encrypting
Return	The number of bytes encrypted or -1 on error

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function RSADecryptVerify(Context:PRSAContext; const Input:PByte; Output:PByte; Len:Integer; Verify:Boolean):Integer;

Description: Perform PKCS1.5 Decryption or Verification

Context	The RSA context containing Private and/or Public keys
Input	The data to be decrypted (Must always be Modulus length)
Output	The buffer for the decrypted result
Len	The size of the output buffer in bytes
Verify	If true then verify instead of decrypting
Return	The number of bytes decrypted or -1 on error

Random functions

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function GetRandomBytes(Buffer:PByte; Count:Integer):Boolean;

Description: To be documented

Note	None documented

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function GetRandomBytesNonZero(Buffer:PByte; Count:Integer):Boolean;

Description: To be documented

Note	None documented

CRC functions

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function CRC16CCITT(CRC:Word; Data:PByte; Size:LongWord):Word;

Description: To be documented

Note	None documented

Base64 functions

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function Base64EncodeString(const Value:String):String;

Description: Encode a string using Base64 encoding and return the encoded result

Note	None documented

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function Base64DecodeString(const Value:String):String;

Description: Decode a Base64 encoded string and return the decoded result

Note	None documented

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function Base64EncodeBuffer(const Source:PChar; SourceLen:Integer; Dest:PChar; var DestLen:Integer):Boolean;

Description: Encode the source buffer using Base64 encoding and return the encoded result in the destination buffer

Note	On success DestLen contains the actual encoded length including a null terminator If Dest is nil then return success (True) with the required size in DestLen

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function Base64DecodeBuffer(const Source:PChar; SourceLen:Integer; Dest:PChar; var DestLen:Integer):Boolean;

Description: Decode a Base64 encoded source buffer and return the decoded result in the destination buffer

Note	On success DestLen contains the actual decoded length (Null terminator is not added to this value) If Dest is nil then return success (True) with the required size in DestLen

Crypto helper functions

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procedure BytesToLE32(Buffer:PByte; Count:LongWord);

Description: Change the byte order of count longwords in the supplied buffer to little endian

Note	None documented

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procedure BytesToBE32(Buffer:PByte; Count:LongWord);

Description: Change the byte order of count longwords in the supplied buffer to big endian

Note	None documented

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procedure BytesToLE64(Buffer:PByte; Count:LongWord);

Description: Change the byte order of count quadwords in the supplied buffer to little endian

Note	None documented

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procedure BytesToBE64(Buffer:PByte; Count:LongWord);

Description: Change the byte order of count quadwords in the supplied buffer to big endian

Note	None documented

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function LongWordToBE(Buffer:PByte):LongWord; inline;

Description: To be documented

Note	None documented

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procedure BEToLongWord(Value:LongWord; Buffer:PByte); inline;

Description: To be documented

Note	None documented

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function QWordToBE(Buffer:PByte):QWord; inline;

Description: To be documented

Note	None documented

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procedure BEToQWord(Value:QWord; Buffer:PByte); inline;

Description: To be documented

Note	None documented

MD5 helper functions

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procedure MD5Init(var Context:TMD5Context);

Description: Initialize an MD5 context with constants

Note	None documented

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procedure MD5Transform(var Context:TMD5Context; Buffer:Pointer);

Description: The core MD5 algorithm, adds an additional 64 Bytes (16 LongWords) to the hash

Note	None documented

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procedure MD5Update(var Context:TMD5Context; Data:Pointer; Size:LongWord);

Description: Add more bytes to the data buffer, add to the hash in 64 byte chunks

Note	None documented

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procedure MD5Final(var Context:TMD5Context; var Digest:TMD5Digest);

Description: Finalize the MD5 context by padding to a 64 Byte boundary, adding QWord count of bits processed and copying the hash to the digest

Note	None documented

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function MD5DigestToString(Digest:PMD5Digest):String;

Description: To be documented

Note	None documented

AES helper functions

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function AESKeySetup(Key:Pointer; KeySize:LongWord; AESKey:PAESKey):Boolean;

Description: Create a pair of AES keys using the supplied key

KeySize	Key size must be 16, 24 or 32 bytes (128, 192 or 256 bits)

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procedure AESEncryptBlock(Plain,Crypt:Pointer; AESKey:PAESKey);

Description: AES Encrypt a 16 byte (128 bit) block of data using the supplied key

Note	None documented

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procedure AESDecryptBlock(Crypt,Plain:Pointer; AESKey:PAESKey);

Description: AES Decrypt a 16 byte (128 bit) block of data using the supplied key

Note	None documented

DES helper functions

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procedure DESCook(Raw1:PLongWord; Key:PDESKey);

Description: To be documented

Note	None documented

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procedure DESKey(Key:PByte; KeyType:LongWord; CryptKey:PDESKey);

Description: To be documented

Note	None documented

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procedure DESProcess(Block,Key:PLongWord);

Description: To be documented

Note	None documented

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function DESKeySetup(Key:Pointer; KeySize:LongWord; EncryptKey,DecryptKey:PDESKey):Boolean;

Description: To be documented

Note	None documented

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procedure DESEncryptBlock(Plain,Crypt:Pointer; EncryptKey:PDESKey);

Description: To be documented

Note	None documented

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procedure DESDecryptBlock(Crypt,Plain:Pointer; DecryptKey:PDESKey);

Description: To be documented

Note	None documented

3DES helper functions

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function DES3KeySetup(Key:Pointer; KeySize:LongWord; DES3Key:PDES3Key):Boolean;

Description: To be documented

Note	None documented

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procedure DES3EncryptBlock(Plain,Crypt:Pointer; DES3Key:PDES3Key);

Description: To be documented

Note	None documented

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procedure DES3DecryptBlock(Crypt,Plain:Pointer; DES3Key:PDES3Key);

Description: To be documented

Note	None documented

SHA1 helper functions

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procedure SHA1Init(var Context:TSHA1Context);

Description: Initialize a SHA1 context with constants

Note	None documented

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procedure SHA1Transform(var Context:TSHA1Context; Buffer:Pointer);

Description: The core SHA1 algorithm, adds an additional 64 Bytes (512 bits) to the hash

Note	None documented

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procedure SHA1Update(var Context:TSHA1Context; Data:Pointer; Size:LongWord);

Description: Add more bytes to the data buffer, add to the hash in 64 byte chunks

Note	None documented

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procedure SHA1Final(var Context:TSHA1Context; var Digest:TSHA1Digest);

Description: Finalize the SHA1 context by padding to a 64 Byte boundary, adding QWord count of bits processed and copying the hash to the digest

Note	None documented

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function SHA1DigestToString(Digest:PSHA1Digest):String;

Description: To be documented

Note	None documented

SHA256 helper functions

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procedure SHA256Init(var Context:TSHA256Context);

Description: Initialize a SHA256 context with constants

Note	None documented

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procedure SHA256Compress(var Context:TSHA256Context; Buffer:Pointer);

Description: The core SHA256 algorithm, adds an additional 64 Bytes (512 bits) to the hash

Note	None documented

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procedure SHA256Process(var Context:TSHA256Context; Data:Pointer; Size:LongWord);

Description: Add more bytes to the data buffer, add to the hash in 64 byte chunks

Note	None documented

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procedure SHA256Complete(var Context:TSHA256Context; var Digest:TSHA256Digest);

Description: Finalize the SHA256 context by padding to a 64 Byte boundary, adding QWord count of bits processed and copying the hash to the digest

Note	None documented

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function SHA256DigestToString(Digest:PSHA256Digest):String;

Description: To be documented

Note	None documented

SHA384 helper functions

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procedure SHA384Init(var Context:TSHA384Context);

Description: Initialize a SHA384 context with constants

Note	None documented

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procedure SHA384Process(var Context:TSHA384Context; Data:Pointer; Size:LongWord);

Description: Add more bytes to the data buffer, add to the hash in 128 byte chunks

Note	None documented

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procedure SHA384Complete(var Context:TSHA384Context; var Digest:TSHA384Digest);

Description: Finalize the SHA384 context by padding to a 128 Byte boundary, adding QWord count of bits processed and copying the hash to the digest

Note	None documented

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function SHA384DigestToString(Digest:PSHA384Digest):String;

Description: To be documented

Note	None documented

SHA512 helper functions

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procedure SHA512Init(var Context:TSHA512Context);

Description: Initialize a SHA512 context with constants

Note	None documented

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procedure SHA512Compress(var Context:TSHA512Context; Buffer:Pointer);

Description: The core SHA512 algorithm, adds an additional 128 Bytes (1024 bits) to the hash

Note	None documented

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procedure SHA512Process(var Context:TSHA512Context; Data:Pointer; Size:LongWord);

Description: Add more bytes to the data buffer, add to the hash in 128 byte chunks

Note	None documented

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procedure SHA512Complete(var Context:TSHA512Context; var Digest:TSHA512Digest);

Description: Finalize the SHA512 context by padding to a 128 Byte boundary, adding QWord count of bits processed and copying the hash to the digest

Note	None documented

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function SHA512DigestToString(Digest:PSHA512Digest):String;

Description: To be documented

Note	None documented

Base64 helper functions

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procedure Base64InitTables;

Description: To be documented

Note	None documented

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