##### CkRsa Perl Reference Documentation

# CkRsa

##### Current Version: 9.5.0.93

RSA encryption component / library. Encrypt and decrypt byte arrays and strings. Generate public/private key pairs from 384 to 4096 bits in length. Import and export RSA keys. Import keys from SNK files. Input/output in raw binary, base64, hex encoding, quoted-printable, URL-encoding, etc.

### Object Creation

$obj = chilkat::CkRsa->new();

### Properties

##### Charset

# $ckStr is a CkString

$rsa->get_Charset($ckStr);

$strVal = $rsa->charset();

$rsa->put_Charset($strVal);

This property only applies when encrypting, decrypting, signing, or verifying signatures for strings. When encrypting strings, the input string is first converted to this charset before encrypting.

When decrypting, the decrypted data is interpreted as a string with this charset encoding and converted to the appropriate return. For example, ActiveX's returning strings always return Unicode (2 bytes/char). Java strings are utf-8. Chilkat C++ strings are ANSI or utf-8. .NET strings are Unicode.

The default value of this property is the ANSI charset of the local computer.

When signing string data, the input string is first converted to this charset before being hashed and signed. When verifying the signature for string data, the input string is first converted to this charset before the verification process begins.

##### DebugLogFilePath

# $ckStr is a CkString

$rsa->get_DebugLogFilePath($ckStr);

$strVal = $rsa->debugLogFilePath();

$rsa->put_DebugLogFilePath($strVal);

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

- a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
- the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
- there is an internal problem (bug) in the Chilkat code that causes the hang.

##### EncodingMode

# $ckStr is a CkString

$rsa->get_EncodingMode($ckStr);

$strVal = $rsa->encodingMode();

$rsa->put_EncodingMode($strVal);

Encoding mode to be used in methods ending in "ENC", such as EncryptStringENC. Valid EncodingModes are "base64", "hex", "url", or "quoted-printable" (or "qp"). Encryption methods ending in "ENC" will return encrypted data as a string encoded according to this property's value. Decryption methods ending in "ENC" accept an encoded string as specified by this property. The string is first decoded and then decrypted. The default value is "base64".

This property also applies to the "ENC" methods for creating and verifying digital signatures.

##### LastErrorHtml

# $ckStr is a CkString

$rsa->get_LastErrorHtml($ckStr);

$strVal = $rsa->lastErrorHtml();

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

top##### LastErrorText

# $ckStr is a CkString

$rsa->get_LastErrorText($ckStr);

$strVal = $rsa->lastErrorText();

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

##### LastErrorXml

# $ckStr is a CkString

$rsa->get_LastErrorXml($ckStr);

$strVal = $rsa->lastErrorXml();

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

top##### LastMethodSuccess

$boolVal = $rsa->get_LastMethodSuccess();

$rsa->put_LastMethodSuccess($boolVal);

Indicate whether the last method call succeeded or failed. A value of 1 indicates success, a value of 0 indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

- Any method that returns a string.
- Any method returning a Chilkat object, binary bytes, or a date/time.
- Any method returning a standard boolean status value where success = 1 and failure = 0.
- Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to 1. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

top##### LittleEndian

$boolVal = $rsa->get_LittleEndian();

$rsa->put_LittleEndian($boolVal);

The default value is 0, which means that signatures and encrypted output will be created using the big endian byte ordering. A value of 1 will produce little-endian output, which is what Microsoft's Crypto API produces.

**Important:** Prior to v9.5.0.49, this property behaved the opposite as it should for encryption. When updating from an older version of Chilkat to v9.5.0.49 or greater, the following change is required:

- If the application did NOT explicity set the LittleEndian property, then no change is required for encryption/decryption. If signatures were being created or verified, then explicitly set this property to 1.
- If the application explicitly set this property, then reverse the setting ONLY if doing encryption/decryption. No changes are required if doing signature creation/verification.

##### NoUnpad

$boolVal = $rsa->get_NoUnpad();

$rsa->put_NoUnpad($boolVal);

If 1, skips unpadding when decrypting. The default is 0. This property value is typically left unchanged.

top##### NumBits

$intVal = $rsa->get_NumBits();

The number of bits of the key generated or imported into this RSA encryption object. Keys ranging in size from 384 bits to 4096 bits can be generated by calling GenerateKey. A public or private key may be imported by calling ImportPublicKey or ImportPrivateKey. A key must be available either via GenerateKey or import before any of the encrypt/decrypt methods may be called.

top##### OaepHash

# $ckStr is a CkString

$rsa->get_OaepHash($ckStr);

$strVal = $rsa->oaepHash();

$rsa->put_OaepHash($strVal);

Selects the hash algorithm for use within OAEP padding. The valid choices are "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The default is "sha1".

top##### OaepMgfHash

# $ckStr is a CkString

$rsa->get_OaepMgfHash($ckStr);

$strVal = $rsa->oaepMgfHash();

$rsa->put_OaepMgfHash($strVal);

Selects the MGF (mask generation) hash algorithm for use within OAEP padding. The valid choices are "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The default is "sha1".

top##### OaepPadding

$boolVal = $rsa->get_OaepPadding();

$rsa->put_OaepPadding($boolVal);

Controls whether Optimal Asymmetric Encryption Padding (OAEP) is used for the padding scheme (for encrypting/decrypting). If set to 0, PKCS1 v1.5 padding is used. If set to 1, PKCS1 v2.0 (OAEP) padding is used.

**Important:** The OAEP padding algorithm uses randomly generated bytes. Therefore, the RSA result will be different each time, even if all of the other inputs are identical. For example, if you RSA encrypt or sign the same data using the same key 100 times, the output will appear different each time, but they are all valid.

When creating digital signatures, this property controls whether RSA-PSS or PKCS1 v1.5 is used. If 1, then the RSA-PSS signature scheme is used. The default value of this property is 0.

##### PssSaltLen

$intVal = $rsa->get_PssSaltLen();

$rsa->put_PssSaltLen($intVal);

Selects the PSS salt length when RSASSA-PSS padding is selected for signatures. The default value is -1 to indicate that the length of the hash function should be used. For example, if the hash function is SHA256, then the PSS salt length will be 32 bytes. Can be optionally set to a value such as 20 if a specific salt length is required. This property should normally remain at the default value.

top##### Utf8

$boolVal = $rsa->get_Utf8();

$rsa->put_Utf8($boolVal);

When set to 1, all "const char *" arguments are interpreted as utf-8 strings. If set to 0 (the default), then "const char *" arguments are interpreted as ANSI strings. Also, when set to 1, and Chilkat method returning a "const char *" is returning the utf-8 representation. If set to 0, all "const char *" return values are ANSI strings.

top##### VerboseLogging

$boolVal = $rsa->get_VerboseLogging();

$rsa->put_VerboseLogging($boolVal);

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

top##### Version

Version of the component/library, such as "9.5.0.63"

top### Methods

##### DecryptBd

RSA decrypts the contents of *bd*. *usePrivateKey* should be set to 1 if the private key is to be used for decrypting. Otherwise it should be set to 0 if the public key is to be used for decrypting.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

Returns 1 for success, 0 for failure.

top##### DecryptBytes

# $usePrivateKey is a boolean

# $outData is a CkByteData (output)

$status = $rsa->DecryptBytes($inData, $usePrivateKey, $outData);

Decrypts byte data using the RSA encryption algorithm. *usePrivateKey* should be set to 1 if the private key is to be used for decrypting. Otherwise it should be set to 0 if the public key is to be used for decrypting.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

Returns 1 for success, 0 for failure.

top##### DecryptBytesENC

# $bUsePrivateKey is a boolean

# $outData is a CkByteData (output)

$status = $rsa->DecryptBytesENC($str, $bUsePrivateKey, $outData);

Same as DecryptBytes, except the input is an encoded string. The encoding is specified by the EncodingMode property, which can have values such as "base64", "hex", "quoted-printable", "url", etc.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

Returns 1 for success, 0 for failure.

top##### DecryptString

# $usePrivateKey is a boolean

# $outStr is a CkString (output)

$status = $rsa->DecryptString($binarySig, $usePrivateKey, $outStr);

$retStr = $rsa->decryptString($binarySig, $usePrivateKey);

Decrypts encrypted string data and returns an unencrypted string. *usePrivateKey* should be set to 1 if the private key is to be used for decrypting. Otherwise it should be set to 0 if the public key is to be used. The Charset property controls how the component interprets the decrypted string. Depending on the programming language, strings are returned to the application as Unicode, utf-8, or ANSI. Internal to DecryptString, the decrypted string is automatically converted from the charset specified by the Charset property to the encoding required by the calling programming language.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

Returns 1 for success, 0 for failure.

top##### DecryptStringENC

# $usePrivateKey is a boolean

# $outStr is a CkString (output)

$status = $rsa->DecryptStringENC($encodedSig, $usePrivateKey, $outStr);

$retStr = $rsa->decryptStringENC($encodedSig, $usePrivateKey);

Same as DecryptString, except the input is an encoded string. The encoding is specified by the EncodingMode property, which can have values such as "base64", "hex", "quoted-printable", "url", etc.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

Returns 1 for success, 0 for failure.

##### EncryptBd

RSA encrypts the contents of *bd*. *usePrivateKey* should be set to 1 if the private key is to be used for encrypting. Otherwise it should be set to 0 if the public key is to be used for encrypting.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

**Note: ** Except for special situations, **the public key should always be used for encrypting**, and the private key for decrypting. This makes sense because an encrypted message is sent to a recipient, and the recipient is the only one in possession of the private key, and therefore the only one that can decrypt and read the message.

Returns 1 for success, 0 for failure.

top##### EncryptBytes

# $usePrivateKey is a boolean

# $outData is a CkByteData (output)

$status = $rsa->EncryptBytes($binaryData, $usePrivateKey, $outData);

Encrypts byte data using the RSA encryption algorithm. *usePrivateKey* should be set to 1 if the private key is to be used for encrypting. Otherwise it should be set to 0 if the public key is to be used for encrypting.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

**Note: ** Except for special situations, **the public key should always be used for encrypting**, and the private key for decrypting. This makes sense because an encrypted message is sent to a recipient, and the recipient is the only one in possession of the private key, and therefore the only one that can decrypt and read the message.

Returns 1 for success, 0 for failure.

top##### EncryptBytesENC

# $bUsePrivateKey is a boolean

# $outStr is a CkString (output)

$status = $rsa->EncryptBytesENC($data, $bUsePrivateKey, $outStr);

$retStr = $rsa->encryptBytesENC($data, $bUsePrivateKey);

Same as EncryptBytes, except the output is an encoded string. The encoding is specified by the EncodingMode property, which can have values such as "base64", "hex", "quoted-printable", "url", etc.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

**Note: ** Except for special situations, **the public key should always be used for encrypting**, and the private key for decrypting. This makes sense because an encrypted message is sent to a recipient, and the recipient is the only one in possession of the private key, and therefore the only one that can decrypt and read the message.

Returns 1 for success, 0 for failure.

##### EncryptString

# $usePrivateKey is a boolean

# $outData is a CkByteData (output)

$status = $rsa->EncryptString($stringToEncrypt, $usePrivateKey, $outData);

Encrypts a string using the RSA encryption algorithm. *usePrivateKey* should be set to 1 if the private key is to be used for encrypting. Otherwise it should be set to 0 if the public key is to be used for encrypting. The string is first converted (if necessary) to the character encoding specified by the Charset property before encrypting. The encrypted bytes are returned.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

**Note: ** Except for special situations, **the public key should always be used for encrypting**, and the private key for decrypting. This makes sense because an encrypted message is sent to a recipient, and the recipient is the only one in possession of the private key, and therefore the only one that can decrypt and read the message.

Returns 1 for success, 0 for failure.

##### EncryptStringENC

# $bUsePrivateKey is a boolean

# $outStr is a CkString (output)

$status = $rsa->EncryptStringENC($str, $bUsePrivateKey, $outStr);

$retStr = $rsa->encryptStringENC($str, $bUsePrivateKey);

Same as EncryptString, except the output is an encoded string. The encoding is specified by the EncodingMode property, which can have values such as "base64", "hex", "quoted-printable", "url", etc.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0.

**Note: ** Except for special situations, **the public key should always be used for encrypting**, and the private key for decrypting. This makes sense because an encrypted message is sent to a recipient, and the recipient is the only one in possession of the private key, and therefore the only one that can decrypt and read the message.

Returns 1 for success, 0 for failure.

##### ExportPrivateKey

$status = $rsa->ExportPrivateKey($outStr);

$retStr = $rsa->exportPrivateKey();

Exports the private-key of an RSA key pair to XML format. This is typically called after generating a new RSA key via the GenerateKey method.

Returns 1 for success, 0 for failure.

top##### ExportPrivateKeyObj

Exports the private-key to a private key object. This is typically called after generating a new RSA key via the GenerateKey method. Once the private key object is obtained, it may be saved in a variety of different formats.

Returns null on failure

##### ExportPublicKey

$status = $rsa->ExportPublicKey($outStr);

$retStr = $rsa->exportPublicKey();

Exports the public-key of an RSA key pair to XML format. This is typically called after generating a new RSA key via the GenerateKey method.

Returns 1 for success, 0 for failure.

top##### ExportPublicKeyObj

Exports the public key to a public key object. Once the public key object is obtained, it may be saved in a variety of different formats.

Returns null on failure

##### GenerateKey

$status = $rsa->GenerateKey($numBits);

Generates a new RSA public/private key pair. The number of bits can range from 512 to 8192. Typical key lengths are 1024, 2048, or 4096 bits. After successful generation, the public/private parts of the key can be exported to XML via the ExportPrivateKey and ExportPublicKey methods.

Note: Prior to version 9.5.0.49, the max key size was 4096 bits. Generating an 8192-bit RSA key takes a considerable amount of time and CPU processing power. There are no event callbacks or progress monitoring for RSA key generation. Calling this will block the thread until it returns.

Returns 1 for success, 0 for failure.

##### ImportPrivateKey

$status = $rsa->ImportPrivateKey($xmlKey);

Imports a private key from XML format. After successful import, the private key can be used to encrypt or decrypt. A private key (by definition) contains both private and public parts. This is because the public key consist of modulus and exponent. The private key consists of modulus, exponent, P, Q, DP, DQ, InverseQ, and D using base64 representation:

<RSAKeyValue> <Modulus>...</Modulus> <Exponent>...</Exponent> <P>...</P> <Q>...</Q> <DP>...</DP> <DQ>...</DQ> <InverseQ>...</InverseQ> <D>...</D> </RSAKeyValue>

**Important: ** The Rsa object can contain either a private key or a public key, but not both. Importing a private key overwrites the existing key regardless of whether the type of key is public or private.

Returns 1 for success, 0 for failure.

##### ImportPrivateKeyObj

Imports a private key from a private key object. The imported private key is used in methods that sign or decrypt.

Returns 1 for success, 0 for failure.

##### ImportPublicKey

$status = $rsa->ImportPublicKey($xmlKey);

Imports a public key from XML format. After successful import, the public key can be used to encrypt or decrypt.

Note: Importing a public key overwrites the key that is currently contained in this object - even if it's a private key.

A public key consists of modulus and exponent using base64 representation:

<RSAPublicKey> <Modulus>...</Modulus> <Exponent>...</Exponent> </RSAPublicKey>

**Important: ** The Rsa object can contain either a private key or a public key, but not both. Importing a private key overwrites the existing key regardless of whether the type of key is public or private.

Returns 1 for success, 0 for failure.

##### ImportPublicKeyObj

Imports a public key from a public key object. The imported public key is used in methods that encrypt data or verify signatures.

Returns 1 for success, 0 for failure.

##### OpenSslSignBd

Duplicates OpenSSL's rsautl utility for creating RSA signatures. The contents of *bd* are signed. If successful, the result is that *bd* contains the RSA signature that itself contains (embeds) the original data.

Returns 1 for success, 0 for failure.

##### OpenSslSignBytes

# $outBytes is a CkByteData (output)

$status = $rsa->OpenSslSignBytes($data, $outData);

Duplicates OpenSSL's rsautl utility for creating RSA signatures. Input data consists of binary bytes, and returns the signature bytes.

Returns 1 for success, 0 for failure.

##### OpenSslSignBytesENC

# $outStr is a CkString (output)

$status = $rsa->OpenSslSignBytesENC($data, $outStr);

$retStr = $rsa->openSslSignBytesENC($data);

Duplicates OpenSSL's rsautl utility for creating RSA signatures. Input data consists of binary bytes, and returns the signature as a string encoded according to the EncodingMode property (base64, hex, etc.).

Returns 1 for success, 0 for failure.

top##### OpenSslSignString

# $outBytes is a CkByteData (output)

$status = $rsa->OpenSslSignString($str, $outData);

Duplicates OpenSSL's rsautl utility for creating RSA signatures. Input data is a string, and returns the signature bytes.

Returns 1 for success, 0 for failure.

top##### OpenSslSignStringENC

# $outStr is a CkString (output)

$status = $rsa->OpenSslSignStringENC($str, $outStr);

$retStr = $rsa->openSslSignStringENC($str);

Duplicates OpenSSL's rsautl utility for creating RSA signatures. Input data is a string, and returns the signature as a string encoded according to the EncodingMode property (base64, hex, etc.).

Returns 1 for success, 0 for failure.

##### OpenSslVerifyBd

Duplicates OpenSSL's rsautl utility for verifying RSA signatures and recovering the original data. On input, the *bd* contains the RSA signature that embeds the original data. If successful (i.e. the signature was verified), then the *bd* is transformed to contain just the original data.

Returns 1 for success, 0 for failure.

##### OpenSslVerifyBytes

# $outBytes is a CkByteData (output)

$status = $rsa->OpenSslVerifyBytes($signature, $outData);

Duplicates OpenSSL's rsautl utility for verifying RSA signatures and recovering the original data. Input data consists of the raw signature bytes and returns the original bytes.

Returns 1 for success, 0 for failure.

##### OpenSslVerifyBytesENC

# $outBytes is a CkByteData (output)

$status = $rsa->OpenSslVerifyBytesENC($str, $outData);

Duplicates OpenSSL's rsautl utility for verifying RSA signatures and recovering the original data. Input data is a signature string encoded according to the EncodingMode property (base64, hex, etc.). Returns the original bytes.

Returns 1 for success, 0 for failure.

top##### OpenSslVerifyString

# $outStr is a CkString (output)

$status = $rsa->OpenSslVerifyString($data, $outStr);

$retStr = $rsa->openSslVerifyString($data);

Duplicates OpenSSL's rsautl utility for verifying RSA signatures and recovering the original data. Input data consists of the raw signature bytes and returns the original string.

Returns 1 for success, 0 for failure.

top##### OpenSslVerifyStringENC

# $outStr is a CkString (output)

$status = $rsa->OpenSslVerifyStringENC($str, $outStr);

$retStr = $rsa->openSslVerifyStringENC($str);

Duplicates OpenSSL's rsautl utility for verifying RSA signatures and recovering the original data. Input data is a signature string encoded according to the EncodingMode property (base64, hex, etc.). Returns the original string.

Returns 1 for success, 0 for failure.

##### SetX509Cert

# $usePrivateKey is a boolean

$status = $rsa->SetX509Cert($cert, $usePrivateKey);

Provides the private or public key indirectly through a certificate. This method is especially useful on Windows computers where the private key is installed as non-exportable (such as on a hardware token).

Returns 1 for success, 0 for failure.

##### SignBd

# $hashAlgorithm is a string

# $bdSig is a CkBinData

$retBool = $rsa->SignBd($bdData, $hashAlgorithm, $bdSig);

Creates an RSA digital signature by hashing the contents of *bdData* and then signing the hash. The hash algorithm is specified by *hashAlgorithm*, which may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The resulting signature is returned in *bdSig*.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0. (The LittleEndian property should also be set to 0 to match Amazon web services, such as CloudFront.)

A private key is required to create digital signatures.

##### SignBytes

# $hashAlgorithm is a string

# $outData is a CkByteData (output)

$status = $rsa->SignBytes($binaryData, $hashAlgorithm, $outData);

Creates an RSA digital signature by hashing *binaryData* and then signing the hash. The hash algorithm is specified by *hashAlgorithm*, which may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0. (The LittleEndian property should also be set to 0 to match Amazon web services, such as CloudFront.)

A private key is required to create a digital signature.

An error is indicated when a byte array of 0 length is returned.

Returns 1 for success, 0 for failure.

top##### SignBytesENC

# $hashAlgorithm is a string

# $outStr is a CkString (output)

$status = $rsa->SignBytesENC($binaryData, $hashAlgorithm, $outStr);

$retStr = $rsa->signBytesENC($binaryData, $hashAlgorithm);

Creates an RSA digital signature by hashing *binaryData* and then signing the hash. The hash algorithm is specified by *hashAlgorithm*, which may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1". The digital signature is returned as an encoded string, where the encoding is specified by the EncodingMode property.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0. (The LittleEndian property should also be set to 0 to match Amazon web services, such as CloudFront.)

A private key is required to create a digital signature.

An error is indicated when null reference is returned.

Returns 1 for success, 0 for failure.

top##### SignHash

# $hashAlg is a string

# $outBytes is a CkByteData (output)

$status = $rsa->SignHash($hashBytes, $hashAlg, $outData);

The same as the SignBytes method, except the hash to be signed is passed directly.

Returns 1 for success, 0 for failure.

top##### SignHashENC

# $hashAlg is a string

# $outStr is a CkString (output)

$status = $rsa->SignHashENC($encodedHash, $hashAlg, $outStr);

$retStr = $rsa->signHashENC($encodedHash, $hashAlg);

The same as SignBytesENC except the hash is passed directly.

Returns 1 for success, 0 for failure.

top##### SignString

# $hashAlgorithm is a string

# $outData is a CkByteData (output)

$status = $rsa->SignString($strToBeHashed, $hashAlgorithm, $outData);

Creates an RSA digital signature by hashing *strToBeHashed* and then signing the hash. The hash algorithm is specified by *hashAlgorithm*, which may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0. (The LittleEndian property should also be set to 0 to match Amazon web services, such as CloudFront.)

A private key is required to create a digital signature.

An error is indicated when a byte array of 0 length is returned.

Returns 1 for success, 0 for failure.

##### SignStringENC

# $hashAlgorithm is a string

# $outStr is a CkString (output)

$status = $rsa->SignStringENC($strToBeHashed, $hashAlgorithm, $outStr);

$retStr = $rsa->signStringENC($strToBeHashed, $hashAlgorithm);

Creates an RSA digital signature by hashing *strToBeHashed* and then signing the hash. The hash algorithm is specified by *hashAlgorithm*, which may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1". The digital signature is returned as an encoded string, where the encoding is specified by the EncodingMode property.

**Important:** If trying to match OpenSSL results, set the LittleEndian property = 0. (The LittleEndian property should also be set to 0 to match Amazon web services, such as CloudFront.)

A private key is required to create a digital signature.

An error is indicated when null reference is returned.

Returns 1 for success, 0 for failure.

##### SnkToXml

# $outStr is a CkString (output)

$status = $rsa->SnkToXml($filename, $outStr);

$retStr = $rsa->snkToXml($filename);

Imports a .snk file to an XML document that can be imported via the ImportPrivateKey method.

Returns 1 for success, 0 for failure.

top##### VerifyBd

# $hashAlgorithm is a string

# $bdSig is a CkBinData

$status = $rsa->VerifyBd($bdData, $hashAlgorithm, $bdSig);

Verifies an RSA digital signature. Returns 1 if the signature in *bdSig* is valid an confirms that the original data in *bdData* has not been modified. The *hashAlgorithm* may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512".

Returns 1 for success, 0 for failure.

##### VerifyBytes

# $hashAlgorithm is a string

# $signatureBytes is a CkByteData

$retBool = $rsa->VerifyBytes($originalData, $hashAlgorithm, $signatureBytes);

Verifies an RSA digital signature. Returns 1 if the signature is valid for the *originalData*. The *hashAlgorithm* may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

##### VerifyBytesENC

# $hashAlgorithm is a string

# $encodedSig is a string

$retBool = $rsa->VerifyBytesENC($originalData, $hashAlgorithm, $encodedSig);

Verifies an RSA digital signature. Returns 1 if the signature is valid for the *originalData*. The *hashAlgorithm* may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

The *encodedSig* is a digital signature encoded according to the EncodingMode property (i.e. base64, hex, etc.).

##### VerifyHash

# $hashAlg is a string

# $sigBytes is a CkByteData

$retBool = $rsa->VerifyHash($hashBytes, $hashAlg, $sigBytes);

The same as VerifyBytes except the hash of the original data is passed directly.

top##### VerifyHashENC

# $hashAlg is a string

# $encodedSig is a string

$retBool = $rsa->VerifyHashENC($encodedHash, $hashAlg, $encodedSig);

The same as VerifyBytesENC except the hash of the original data is passed directly.

top##### VerifyPrivateKey

$status = $rsa->VerifyPrivateKey($xml);

Returns 1 if the XML contains a valid RSA private key. Otherwise returns 0.

Returns 1 for success, 0 for failure.

top##### VerifyString

# $hashAlgorithm is a string

# $binarySig is a CkByteData

$retBool = $rsa->VerifyString($originalString, $hashAlgorithm, $binarySig);

Verifies an RSA digital signature. Returns 1 if the signature is valid for the *originalString*. The *hashAlgorithm* may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

##### VerifyStringENC

# $hashAlgorithm is a string

# $encodedSig is a string

$retBool = $rsa->VerifyStringENC($originalString, $hashAlgorithm, $encodedSig);

Verifies an RSA digital signature. Returns 1 if the signature is valid for the *originalString*. The *hashAlgorithm* may be "SHA-1", "MD5", "MD2", "SHA-256", "SHA-384", or "SHA-512". The recommended hash algorithm is "SHA-1".

The *encodedSig* is a digital signature encoded according to the EncodingMode property (i.e. base64, hex, etc.).