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[iscsi] Use generic base16 functions for iSCSI
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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@ -35,6 +35,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#include <ipxe/tcpip.h>
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#include <ipxe/settings.h>
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#include <ipxe/features.h>
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#include <ipxe/base16.h>
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#include <ipxe/iscsi.h>
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/** @file
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@ -481,7 +482,6 @@ static int iscsi_tx_data_out ( struct iscsi_session *iscsi ) {
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static int iscsi_build_login_request_strings ( struct iscsi_session *iscsi,
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void *data, size_t len ) {
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unsigned int used = 0;
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unsigned int i;
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const char *auth_method;
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if ( iscsi->status & ISCSI_STATUS_STRINGS_SECURITY ) {
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@ -508,26 +508,23 @@ static int iscsi_build_login_request_strings ( struct iscsi_session *iscsi,
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}
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if ( ( iscsi->status & ISCSI_STATUS_STRINGS_CHAP_RESPONSE ) ) {
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char buf[ base16_encoded_len ( iscsi->chap.response_len ) + 1 ];
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assert ( iscsi->initiator_username != NULL );
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base16_encode ( iscsi->chap.response, iscsi->chap.response_len,
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buf );
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used += ssnprintf ( data + used, len - used,
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"CHAP_N=%s%cCHAP_R=0x",
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iscsi->initiator_username, 0 );
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for ( i = 0 ; i < iscsi->chap.response_len ; i++ ) {
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used += ssnprintf ( data + used, len - used, "%02x",
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iscsi->chap.response[i] );
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}
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used += ssnprintf ( data + used, len - used, "%c", 0 );
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"CHAP_N=%s%cCHAP_R=0x%s%c",
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iscsi->initiator_username, 0, buf, 0 );
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}
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if ( ( iscsi->status & ISCSI_STATUS_STRINGS_CHAP_CHALLENGE ) ) {
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size_t challenge_len = ( sizeof ( iscsi->chap_challenge ) - 1 );
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char buf[ base16_encoded_len ( challenge_len ) + 1 ];
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base16_encode ( ( iscsi->chap_challenge + 1 ), challenge_len,
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buf );
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used += ssnprintf ( data + used, len - used,
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"CHAP_I=%d%cCHAP_C=0x",
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iscsi->chap_challenge[0], 0 );
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for ( i = 1 ; i < sizeof ( iscsi->chap_challenge ) ; i++ ) {
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used += ssnprintf ( data + used, len - used, "%02x",
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iscsi->chap_challenge[i] );
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}
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used += ssnprintf ( data + used, len - used, "%c", 0 );
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"CHAP_I=%d%cCHAP_C=0x%s%c",
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iscsi->chap_challenge[0], 0, buf, 0 );
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}
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if ( iscsi->status & ISCSI_STATUS_STRINGS_OPERATIONAL ) {
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@ -740,10 +737,9 @@ static int iscsi_handle_chap_i_value ( struct iscsi_session *iscsi,
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*/
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static int iscsi_handle_chap_c_value ( struct iscsi_session *iscsi,
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const char *value ) {
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char buf[3];
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char *endp;
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uint8_t byte;
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uint8_t buf[ strlen ( value ) ]; /* Decoding never expands data */
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unsigned int i;
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int len;
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/* Check and strip leading "0x" */
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if ( ( value[0] != '0' ) || ( value[1] != 'x' ) ) {
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@ -751,20 +747,15 @@ static int iscsi_handle_chap_c_value ( struct iscsi_session *iscsi,
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iscsi, value );
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return -EPROTO_INVALID_CHAP_CHALLENGE;
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}
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value += 2;
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/* Process challenge an octet at a time */
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for ( ; ( value[0] && value[1] ) ; value += 2 ) {
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memcpy ( buf, value, 2 );
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buf[2] = 0;
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byte = strtoul ( buf, &endp, 16 );
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if ( *endp != '\0' ) {
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DBGC ( iscsi, "iSCSI %p saw invalid CHAP challenge "
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"byte \"%s\"\n", iscsi, buf );
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return -EPROTO_INVALID_CHAP_CHALLENGE;
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}
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chap_update ( &iscsi->chap, &byte, sizeof ( byte ) );
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/* Process challenge */
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len = base16_decode ( ( value + 2 ), buf );
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if ( len < 0 ) {
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DBGC ( iscsi, "iSCSI %p invalid CHAP challenge \"%s\": %s\n",
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iscsi, value, strerror ( len ) );
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return len;
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}
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chap_update ( &iscsi->chap, buf, len );
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/* Build CHAP response */
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DBGC ( iscsi, "iSCSI %p sending CHAP response\n", iscsi );
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