2
Data Types

This chapter discusses Oracle Cryptographic Toolkit external datatype codes. The following topics are covered:

• "Data Types"
• "Data Structures"

2.1 Data Types

Each data type name and its corresponding data type prefix used in the Oracle Cryptographic Toolkit is listed as a subheading below. The table below each subheading lists the possible data type values and their corresponding descriptions.

2.1.1 Name Prefixes

Each data type used in the Oracle Cryptographic Toolkit has a unique prefix. Following is a list of Oracle Cryptographic Toolkit data type names and prefixes.

Table 2-1 Data Types

Data Type Name	Prefix Used
Crypto Engine State	nzttces_
Crypto Engine Functions	nzttcef_
Identity Type	nzttidenttype_
Cipher Types	nzttciphertype_
TDU Formats	nztttdufmt_
Validate State	nzttvalstate_
Unique ID	nzttid_
Timestamp	nztttstamp_

2.1.2 Crypto Engine State

nzttces

NZTTCES_CONTINUE	Continue processing input
NZTTCES_END	End processing input
NZTTCES_RESET	Reset processing and skip generating output

2.1.3 Unique ID

nzttid

nzttID

Unique IDs for personas and identities represented with 128 bits

2.1.4 Timestamp

nztttstamp

nzttTStamp

Timestamp as a 32 bit quantity in UTC

2.2 Data Structures

Following is a list of Oracle Cryptographic Toolkit data structures. Each data structure is listed along with a brief description.

Table 2-2 Data Structures and Descriptions

Name of Data Structure	Description
nzttBufferBlock	This is an output parameter block used to describe each buffer
nzttWallet	The Wallet structure contains a list of personas stored in that wallet and private wallet information
nzttPersona	The Persona structure contains information about a persona
nzttIdentity	The Identity structure contains information about an identity

2.2.1 nzttBufferBlock

A function uses an output parameter block to describe each buffer when that function needs to fill (and possibly grow) an output buffer. The flags_nzttBufferBlock member tells the function whether the buffer can be grown. The buffer is automatically reallocated when flags_nzttBufferBlock is 0.

The buflen_nzttBufferBlock member is set to the length of the buffer before the function is called and equals the length of the buffer when the function is finished. If buflen_nzttBufferBlock is 0, then the initial pointer stored in buflen_nzttBufferBlock is ignored.

The usedlen_nzttBufferBlock member is set to the length of the object stored in the buffer when the function is finished. If the initial buffer had a non zero length, then it is possible that the object length is shorter than the buffer length.

The buffer_nzttBufferBlock member is a pointer to the output object. Refer to Table 2-3, "nzttBufferBlock".

Table 2-3 nzttBufferBlock

Type	Name	Description
uword	flags_nzttBufferBlock	Flags
size_t	buflen_nzttBufferBlock	Total length of buffer
size_t	usedlen_nzttBufferBlock	Length of buffer actually used
ub1	*buffer_nzttBufferBlock	Pointer to buffer

2.2.2 nzttWallet

The wallet structure contains one or more personas. Each of these personas contains its private key, its identity, and trusted third party identities. All identities are qualified with trust where the qualifier can indicate anything from untrusted to trusted for specific operations. Refer to Table 2-4, "nzttWallet".

Table 2-4 nzttWallet

Type	Name	Description
size_t	npersona_nzttWallet	Number of personas in the wallet
nzttPersona	list_nzttWallet	List of personas in the wallet
nzttWalletPrivate	private_nzttWallet	Private wallet information

2.2.3 nzttPersona

The persona structure contains information about a persona. Refer to Table 2-5, "nzttPersona".

Table 2-5 nzttPersona

Type	Name	Description
nzttIdentity	myidentity_nzttPersona	My identity
size_t	nidents_nzttPersona	Number of trusted identities
nzttIdentity	list_nzttPersona	List of trusted identities
nzttPersonaPrivate	private_nzttPersona	Opaque part of persona

2.2.4 nzttIdentity

The identity structure contains information about an identity. Refer to Table 2-6, "nzttIdentity".

Table 2-6 nzttIdentity

Type	Name	Description
size_t	aliaslen_nzttIdentity	Length of alias
text	alias_nzttIdentity	Alias
size_t	commentlen_nzttIdentity	Length of comment
text	comment_nzttIdentity	Comment
nzttIdentityPrivate	private_nzttIdentity	Opaque part of identity

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