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Some more EC pubkey parsing refactoring

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Fix a bug in pk_rsa() and pk_ec() along the way
This commit is contained in:
Manuel Pégourié-Gonnard 2013-07-11 13:59:02 +02:00 • committed by Paul Bakker
parent 1c808a011c
commit a2d4e644ac
5 changed files with 54 additions and 75 deletions

18
library/asn1parse.c
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@ -209,6 +209,24 @@ int asn1_get_bitstring( unsigned char **p, const unsigned char *end,
return 0;
}
/*
* Get a bit string without unused bits
*/
int asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
size_t *len )
{
int ret;
if( ( ret = asn1_get_tag( p, end, len, ASN1_BIT_STRING ) ) != 0 )
return( ret );
if( --*len < 1 || *(*p)++ != 0 )
return( POLARSSL_ERR_ASN1_INVALID_DATA );
return( 0 );
}
/*
* Parses and splits an ASN.1 "SEQUENCE OF <tag>"