Unit Crypto
From Ultibo.org
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Description
Ultibo Crypto interface unit
To be documented
Constants
Crypto cipher algorithms
CRYPTO_CIPHER_ALG_* CRYPTO_CIPHER_ALG_NONE = 0;
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CRYPTO_CIPHER_ALG_AES = 1;
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CRYPTO_CIPHER_ALG_DES = 2;
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CRYPTO_CIPHER_ALG_3DES = 3;
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CRYPTO_CIPHER_ALG_RC4 = 4;
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Crypto cipher modes
CRYPTO_CIPHER_MODE_* CRYPTO_CIPHER_MODE_ECB = 0;
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Electronic Codebook |
CRYPTO_CIPHER_MODE_CBC = 1;
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Cipher Block Chaining |
CRYPTO_CIPHER_MODE_CFB = 2;
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Cipher Feedback |
CRYPTO_CIPHER_MODE_OFB = 3;
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Output Feedback |
CRYPTO_CIPHER_MODE_CRT = 4;
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Counter |
Crypto hash algorithms
CRYPTO_HASH_ALG_* CRYPTO_HASH_ALG_NONE = 0;
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CRYPTO_HASH_ALG_MD5 = 1;
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CRYPTO_HASH_ALG_SHA1 = 2;
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CRYPTO_HASH_ALG_SHA256 = 3;
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CRYPTO_HASH_ALG_HMAC_MD5 = 4;
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CRYPTO_HASH_ALG_HMAC_SHA1 = 5;
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CRYPTO_HASH_ALG_HMAC_SHA256 = 6;
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AES block size
AES_BLOCK_* AES_BLOCK_SIZE = 16;
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128 bit blocks |
AES key size
AES_KEY_* AES_KEY_SIZE128 = 16;
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128 bit keys |
AES_KEY_SIZE192 = 24;
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192 bit keys |
AES_KEY_SIZE256 = 32;
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256 bit keys |
DES block size
DES_BLOCK_* DES_BLOCK_SIZE = 8;
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64 bit blocks |
DES key size
DES_KEY_* DES_KEY_SIZE = 8;
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64 bit keys |
DES key type
DES_KEYTYPE_* DES_KEYTYPE_ENCRYPT = 0;
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DES_KEYTYPE_DECRYPT = 1;
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DES_BYTEBIT:array[0..7] of LongWord = (
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$80, $40, $20, $10, $08, $04, $02, $01);
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3DES block size
DES3_BLOCK_* DES3_BLOCK_SIZE = 8;
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64 bit blocks |
3DES key size
DES3_KEY_* DES3_KEY_SIZE = 24;
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192 bit (3 x 64 bit) keys |
SHA1 constants
SHA1_* SHA1_K20 = $5A827999;
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SHA1_K40 = $6ED9EBA1;
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SHA1_K60 = $8F1BBCDC;
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SHA1_K80 = $CA62C1D6;
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MIME64 constants
MIME64_* MIME64EncodingTable:String = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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Type definitions
To be documented
Public variables
Crypto specific variables
CryptoInitialized:Boolean;
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MIME64 variables
MIME64DecodingTable:String;
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Function declarations
Initialization functions
procedure CryptoInit;
Description: To be documented
| Note | None documented |
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Crypto functions
function HashCreate(Algorithm:LongWord; Key:Pointer; KeySize:LongWord):PHashContext;
Description: Initialize a hash context based on an algorithm and an optional 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 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 also include an initialization vector for CBC mode |
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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 |
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MD5 functions
function MD5DigestData(Data:PMD5Block; Digest:PMD5Digest):Boolean;
Description: Generate a 128 bit MD5 digest (Hash) from the supplied data
| Data | 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
| 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. |
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| 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. |
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. |
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| Note | The MD5 HMAC algorithm is: MD5(Key xor oPad, MD5(Key xor iPad, Value)). Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times. |
AES functions
function AESEncryptData(Key:Pointer; KeySize:LongWord; Vector,Plain,Crypt:Pointer; Size:LongWord):Boolean;
Description: To be documented
| Note | None documented |
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function AESDecryptData(Key:Pointer; KeySize:LongWord; Vector,Crypt,Plain:Pointer; Size:LongWord):Boolean;
Description: To be documented
| Note | None documented |
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DES functions
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 |
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3DES functions
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 |
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RC4 functions
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: Decrypt the supplied data with a key using the RC4 cipher algorithm
| Note | None documented |
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SHA1 functions
function SHA1DigestData(Data:PSHA1Block; Digest:PSHA1Digest):Boolean;
Description: Generate a 160 bit SHA1 digest (Hash) from the supplied data
| Data | 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
| 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. |
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| 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. |
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. |
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| Note | The SHA1 HMAC algorithm is: SHA1(Key xor oPad, SHA1(Key xor iPad, Value)). Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times. |
SHA256 functions
function SHA256DigestData(Data:PSHA256Block; Digest:PSHA256Digest):Boolean;
Description: Generate a 256 bit SHA256 digest (Hash) from the supplied data
| Data | 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
| 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. |
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| Note | The SHA256 HMAC algorithm is: SHA256(Key xor oPad, SHA256(Key xor iPad, Data)). Where iPad is the byte $36 repeated 64 times, oPad is the byte $5c repeated 64 times. |
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. |
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| 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. |
CRC functions
function CRC16CCITT(CRC:Word; Data:PByte; Size:LongWord):Word;
Description: To be documented
| Note | None documented |
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MIME64 functions
function MIME64EncodeString(const AValue:String):String;
Description: To be documented
| Note | None documented |
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function MIME64DecodeString(const AValue:String):String;
Description: To be documented
| Note | None documented |
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Crypto helper functions
procedure BytesToLE(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 BytesToBE(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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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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MD5 helper functions
procedure MD5Init(var Context:TMD5Context);
Description: Initialize an MD5 context with constants
| 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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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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function MD5DigestToString(Digest:PMD5Digest):String;
Description: To be documented
| Note | None documented |
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AES helper functions
function AESTE0(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE1(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE2(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE3(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTD0(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTD1(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTD2(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTD3(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE4_0(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE4_1(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE4_2(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESTE4_3(I:Byte):LongWord; inline;
Description: To be documented
| Note | None documented |
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function AESByte(X,N:LongWord):Byte; inline;
Description: To be documented
| Note | None documented |
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function AESKeySetup(Key:Pointer; KeySize:LongWord; AESKey:PAESKey):Boolean;
Description: To be documented
| Note | None documented |
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procedure AESEncryptBlock(Plain,Crypt:Pointer; AESKey:PAESKey);
Description: To be documented
| Note | None documented |
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procedure AESDecryptBlock(Crypt,Plain:Pointer; AESKey:PAESKey);
Description: To be documented
| Note | None documented |
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DES helper functions
procedure DESKey(Key:PByte; KeyType:LongWord; CryptKey:PDESKey);
Description: To be documented
| Note | None documented |
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procedure DESCook(Raw1:PLongWord; Key: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 |
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3DES helper functions
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 |
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SHA1 helper functions
procedure SHA1Init(var Context:TSHA1Context);
Description: Initialize a SHA1 context with constants
| 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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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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function SHA1DigestToString(Digest:PSHA1Digest):String;
Description: To be documented
| Note | None documented |
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SHA256 helper functions
procedure SHA256Init(var Context:TSHA256Context);
Description: Initialize a SHA256 context with constants
| 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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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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function SHA256DigestToString(Digest:PSHA256Digest):String;
Description: To be documented
| Note | None documented |
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MIME64 helper functions
procedure MIME64InitTables;
Description: To be documented
| Note | None documented |
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