ICspAlgorithm::get_DefaultLength method (certenroll.h)

The DefaultLength property retrieves the default length of a key. This property is web enabled.

This property is read-only.

Syntax

HRESULT get_DefaultLength(
  LONG *pValue
);

Parameters

pValue

Return value

None

Remarks

You can use this property to retrieve the default size, in bits, of a key. The DefaultLength, IncrementLength, MaxLength, and MinLength properties can vary by algorithm and provider. The following table lists a few algorithms for which multiple key sizes can be set. The list is not inclusive.

Algorithm OID Cryptographic provider Key length (bits)
XCN_OID_RSA_RSA(1.2.840.113549.1.1.1) Microsoft Smart Card Key Storage Provider

Microsoft Base Smart Card Crypto Provider

Minimum: 1,024

Maximum: 4,096

Default: 1,024

Increment: 512

XCN_OID_RSA_RSA(1.2.840.113549.1.1.1) Microsoft Software Key Storage Provider

Microsoft Base Cryptographic Provider v1.0

Microsoft Enhanced Cryptographic Provider v1.0

Microsoft Enhanced RSA and AES Cryptographic Provider

Microsoft RSA Schannel Cryptographic Provider

Microsoft Strong Cryptographic Provider

Minimum: 384

Maximum: 16,384

Default: 1,024

Increment: 8

XCN_OID_X957_DSA(1.2.840.10040.4.1) Microsoft Software Key Storage Provider

Microsoft Base DSS and Diffie-Hellman Cryptographic Provider

Microsoft Base DSS Cryptographic Provider

Microsoft DH Schannel Cryptographic Provider

Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider

Minimum: 512

Maximum: 1,024

Default: 1,024

Increment: 64

XCN_OID_ANSI_X942_DH(1.2.840.10046.2.1) Diffie-Hellman key exchange algorithm. Minimum: 512

Maximum: 1,024

Default: 1,024

Increment: 64

XCN_OID_ANSI_X942_DH(1.2.840.10046.2.1) Microsoft DH Schannel Cryptographic Provider

Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider

Minimum: 512

Maximum: 4,096

Default: 1,024

Increment: 64

XCN_OID_RSA_RC2CBC(1.2.840.113549.3.2) Microsoft Software Key Storage Provider

Microsoft Smart Card Key Storage Provider

Microsoft Base Smart Card Crypto Provider

Microsoft DH Schannel Cryptographic Provider

Microsoft Enhanced Cryptographic Provider v1.0

Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider

Microsoft Enhanced RSA and AES Cryptographic Provider

Microsoft RSA Schannel Cryptographic Provider

Microsoft Strong Cryptographic Provider

Minimum: 40

Maximum: 128

Default: 128

Increment: 8

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header certenroll.h
DLL CertEnroll.dll

See also

ICspAlgorithm

IncrementLength