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Move static x509_name_cmp() in library/x509_crt.c
A subsequent change will need this function earlier within the file.
This commit is contained in:
Hanno Becker
parent
a8b13d79bf
commit
1f8527f1cf
@ -227,6 +227,136 @@ static int x509_profile_check_key( const mbedtls_x509_crt_profile *profile,
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return( -1 );
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}
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/*
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* Like memcmp, but case-insensitive and always returns -1 if different
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*/
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static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
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{
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size_t i;
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unsigned char diff;
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const unsigned char *n1 = s1, *n2 = s2;
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for( i = 0; i < len; i++ )
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{
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diff = n1[i] ^ n2[i];
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if( diff == 0 )
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continue;
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if( diff == 32 &&
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( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
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( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
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{
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continue;
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}
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return( -1 );
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}
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return( 0 );
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}
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/*
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* Return 0 if name matches wildcard, -1 otherwise
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*/
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static int x509_check_wildcard( const char *cn, const mbedtls_x509_buf *name )
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{
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size_t i;
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size_t cn_idx = 0, cn_len = strlen( cn );
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/* We can't have a match if there is no wildcard to match */
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if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' )
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return( -1 );
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for( i = 0; i < cn_len; ++i )
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{
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if( cn[i] == '.' )
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{
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cn_idx = i;
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break;
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}
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}
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if( cn_idx == 0 )
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return( -1 );
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if( cn_len - cn_idx == name->len - 1 &&
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x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
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{
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return( 0 );
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}
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return( -1 );
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}
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/*
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* Compare two X.509 strings, case-insensitive, and allowing for some encoding
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* variations (but not all).
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*
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* Return 0 if equal, -1 otherwise.
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*/
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static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
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{
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if( a->tag == b->tag &&
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a->len == b->len &&
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memcmp( a->p, b->p, b->len ) == 0 )
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{
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return( 0 );
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}
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if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
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( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
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a->len == b->len &&
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x509_memcasecmp( a->p, b->p, b->len ) == 0 )
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{
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return( 0 );
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}
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return( -1 );
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}
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/*
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* Compare two X.509 Names (aka rdnSequence).
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*
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* See RFC 5280 section 7.1, though we don't implement the whole algorithm:
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* we sometimes return unequal when the full algorithm would return equal,
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* but never the other way. (In particular, we don't do Unicode normalisation
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* or space folding.)
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*
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* Return 0 if equal, -1 otherwise.
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*/
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static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
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{
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/* Avoid recursion, it might not be optimised by the compiler */
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while( a != NULL || b != NULL )
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{
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if( a == NULL || b == NULL )
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return( -1 );
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/* type */
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if( a->oid.tag != b->oid.tag ||
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a->oid.len != b->oid.len ||
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memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
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{
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return( -1 );
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}
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/* value */
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if( x509_string_cmp( &a->val, &b->val ) != 0 )
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return( -1 );
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/* structure of the list of sets */
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if( a->next_merged != b->next_merged )
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return( -1 );
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a = a->next;
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b = b->next;
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}
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/* a == NULL == b */
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return( 0 );
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}
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/*
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* Reset (init or clear) a verify_chain
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*/
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@ -1756,136 +1886,6 @@ static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca,
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}
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#endif /* MBEDTLS_X509_CRL_PARSE_C */
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/*
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* Like memcmp, but case-insensitive and always returns -1 if different
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*/
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static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
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{
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size_t i;
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unsigned char diff;
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const unsigned char *n1 = s1, *n2 = s2;
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for( i = 0; i < len; i++ )
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{
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diff = n1[i] ^ n2[i];
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if( diff == 0 )
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continue;
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if( diff == 32 &&
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( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
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( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
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{
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continue;
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}
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return( -1 );
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}
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return( 0 );
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}
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/*
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* Return 0 if name matches wildcard, -1 otherwise
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*/
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static int x509_check_wildcard( const char *cn, const mbedtls_x509_buf *name )
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{
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size_t i;
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size_t cn_idx = 0, cn_len = strlen( cn );
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/* We can't have a match if there is no wildcard to match */
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if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' )
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return( -1 );
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for( i = 0; i < cn_len; ++i )
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{
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if( cn[i] == '.' )
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{
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cn_idx = i;
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break;
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}
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}
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if( cn_idx == 0 )
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return( -1 );
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if( cn_len - cn_idx == name->len - 1 &&
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x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
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{
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return( 0 );
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}
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return( -1 );
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}
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/*
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* Compare two X.509 strings, case-insensitive, and allowing for some encoding
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* variations (but not all).
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*
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* Return 0 if equal, -1 otherwise.
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*/
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static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
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{
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if( a->tag == b->tag &&
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a->len == b->len &&
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memcmp( a->p, b->p, b->len ) == 0 )
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{
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return( 0 );
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}
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if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
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( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
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a->len == b->len &&
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x509_memcasecmp( a->p, b->p, b->len ) == 0 )
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{
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return( 0 );
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}
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return( -1 );
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}
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/*
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* Compare two X.509 Names (aka rdnSequence).
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*
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* See RFC 5280 section 7.1, though we don't implement the whole algorithm:
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* we sometimes return unequal when the full algorithm would return equal,
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* but never the other way. (In particular, we don't do Unicode normalisation
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* or space folding.)
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*
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* Return 0 if equal, -1 otherwise.
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*/
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static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
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{
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/* Avoid recursion, it might not be optimised by the compiler */
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while( a != NULL || b != NULL )
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{
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if( a == NULL || b == NULL )
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return( -1 );
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/* type */
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if( a->oid.tag != b->oid.tag ||
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a->oid.len != b->oid.len ||
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memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
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{
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return( -1 );
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}
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/* value */
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if( x509_string_cmp( &a->val, &b->val ) != 0 )
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return( -1 );
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/* structure of the list of sets */
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if( a->next_merged != b->next_merged )
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return( -1 );
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a = a->next;
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b = b->next;
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}
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/* a == NULL == b */
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return( 0 );
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}
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/*
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* Check the signature of a certificate by its parent
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*/
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