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4e9f71227a
This will allow us to ship the LTS branches in a single archive This commit was generated using the following script: # ======================== #!/bin/sh header1='\ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later\ *\ * This file is provided under the Apache License 2.0, or the\ * GNU General Public License v2.0 or later.\ *\ * **********\ * Apache License 2.0:\ *\ * Licensed under the Apache License, Version 2.0 (the "License"); you may\ * not use this file except in compliance with the License.\ * You may obtain a copy of the License at\ *\ * http://www.apache.org/licenses/LICENSE-2.0\ *\ * Unless required by applicable law or agreed to in writing, software\ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT\ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\ * See the License for the specific language governing permissions and\ * limitations under the License.\ *\ * **********\ *\ * **********\ * GNU General Public License v2.0 or later:\ *\ * This program is free software; you can redistribute it and/or modify\ * it under the terms of the GNU General Public License as published by\ * the Free Software Foundation; either version 2 of the License, or\ * (at your option) any later version.\ *\ * This program is distributed in the hope that it will be useful,\ * but WITHOUT ANY WARRANTY; without even the implied warranty of\ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\ * GNU General Public License for more details.\ *\ * You should have received a copy of the GNU General Public License along\ * with this program; if not, write to the Free Software Foundation, Inc.,\ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\ *\ * **********' find -path './.git' -prune -o '(' -name '*.c' -o -name '*.cpp' -o -name '*.fmt' -o -name '*.h' ')' -print | xargs sed -i " # Normalize the first line of the copyright headers (no text on the first line of a block comment) /^\/\*.*Copyright.*Arm/I s/\/\*/&\n */ # Insert new copyright header /SPDX-License-Identifier/ i\ $header1 # Delete old copyright header /SPDX-License-Identifier/,$ { # Delete lines until the one preceding the mbedtls declaration N 1,/This file is part of/ { /This file is part of/! D } } " # Format copyright header for inclusion into scripts header2=$(echo "$header1" | sed 's/^\\\? \* \?/#/') find -path './.git' -prune -o '(' -name '*.gdb' -o -name '*.pl' -o -name '*.py' -o -name '*.sh' ')' -print | xargs sed -i " # Insert new copyright header /SPDX-License-Identifier/ i\ $header2 # Delete old copyright header /SPDX-License-Identifier/,$ { # Delete lines until the one preceding the mbedtls declaration N 1,/This file is part of/ { /This file is part of/! D } } " # ======================== Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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* Hardware entropy collector for the K64F, using Freescale's RNGA
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*
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* This file is provided under the Apache License 2.0, or the
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* GNU General Public License v2.0 or later.
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*
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* **********
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* Apache License 2.0:
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* **********
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*
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* **********
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* GNU General Public License v2.0 or later:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* **********
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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/*
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* WARNING: this is temporary!
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* This should be in a separate yotta module which would be a target
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* dependency of mbedtls (see IOTSSL-313)
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*/
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#if defined(TARGET_LIKE_K64F)
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/*
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* Reference: "K64 Sub-Family Reference Manual, Rev. 2", chapter 34
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*/
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#include "fsl_clock_manager.h"
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/*
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* Get one byte of entropy from the RNG, assuming it is up and running.
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* As recommended (34.1.1), get only one bit of each output.
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*/
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static void rng_get_byte( unsigned char *byte )
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{
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size_t bit;
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/* 34.5 Steps 3-4-5: poll SR and read from OR when ready */
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for( bit = 0; bit < 8; bit++ )
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{
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while( ( RNG->SR & RNG_SR_OREG_LVL_MASK ) == 0 );
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*byte |= ( RNG->OR & 1 ) << bit;
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}
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}
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/*
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* Get len bytes of entropy from the hardware RNG.
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*/
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int mbedtls_hardware_poll( void *data,
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unsigned char *output, size_t len, size_t *olen )
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{
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size_t i;
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int ret;
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((void) data);
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CLOCK_SYS_EnableRngaClock( 0 );
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/* Set "Interrupt Mask", "High Assurance" and "Go",
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* unset "Clear interrupt" and "Sleep" */
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RNG->CR = RNG_CR_INTM_MASK | RNG_CR_HA_MASK | RNG_CR_GO_MASK;
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for( i = 0; i < len; i++ )
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rng_get_byte( output + i );
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/* Just be extra sure that we didn't do it wrong */
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if( ( RNG->SR & RNG_SR_SECV_MASK ) != 0 )
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{
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ret = -1;
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goto cleanup;
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}
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*olen = len;
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ret = 0;
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cleanup:
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/* Disable clock to save power - assume we're the only users of RNG */
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CLOCK_SYS_DisableRngaClock( 0 );
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return( ret );
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}
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#endif
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