bignum: XML Security Library Reference Manual

## bignum bignum — Big numbers support functions implementation for NSS. |

## Stability Level

Stable, unless otherwise indicated

## Functions

SECItem * | xmlSecNssNodeGetBigNumValue ()
int | xmlSecNssNodeSetBigNumValue ()

## Description

## Functions

### xmlSecNssNodeGetBigNumValue ()

    SECItem *
    xmlSecNssNodeGetBigNumValue (PRArenaPool *arena,
                                 const xmlNodePtr cur,
                                 SECItem *a);

Converts the node content from CryptoBinary format (http://www.w3.org/TR/xmldsig-core/sec-CryptoBinary) to a SECItem. If no SECItem object provided then a new one is created (caller is responsible for freeing it).

#### Parameters

arena | the arena from which to allocate memory |
cur | the pointer to an XML node. |
a | a SECItem object to hold the BigNum value |

#### Returns

a pointer to SECItem produced from CryptoBinary string or NULL if an error occurs.

### xmlSecNssNodeSetBigNumValue ()

    int
    xmlSecNssNodeSetBigNumValue (xmlNodePtr cur,
                                 const SECItem *a,
                                 int addLineBreaks);

Converts SECItem to CryptoBinary string (http://www.w3.org/TR/xmldsig-core/sec-CryptoBinary) and sets it as the content of the given node. If the addLineBreaks is set then line breaks are added before and after the CryptoBinary string.

#### Parameters

cur | the pointer to an XML node. |
a | a SECItem containing the BigNum value. |
addLineBreaks | if the flag is equal to 1 then linebreaks will be added before and after new buffer content. |

#### Returns

0 on success or -1 otherwise.

## Types and Values