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Fix infinite loop with small sha1 inputs. Thanks to Peter W. on ZD9976 for the report

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kaleb-himes
2020-02-27 09:39:22 -07:00
parent f568f394b1
commit d9e221806b
1 changed files with 3 additions and 0 deletions
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3
wolfcrypt/src/port/pic32/pic32mz-crypt.c
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@ -427,6 +427,9 @@ static void start_engine(pic32mz_desc *desc)
bufferLen = desc->dbPtr; bufferLen = desc->dbPtr;
if (bufferLen % 4) if (bufferLen % 4)
bufferLen = (bufferLen + 4) - (bufferLen % 4); bufferLen = (bufferLen + 4) - (bufferLen % 4);
/* initialize the MSGLEN on engine startup to avoid infinite loop when
* length is less than 257 (size of PIC32_BLOCK_SIZE) */
uc_desc->bd[desc->currBd].MSGLEN = desc->msgSize;
uc_desc->bd[desc->currBd].BD_CTRL.BUFLEN = bufferLen; uc_desc->bd[desc->currBd].BD_CTRL.BUFLEN = bufferLen;
uc_desc->bd[desc->currBd].BD_CTRL.LAST_BD = 1; uc_desc->bd[desc->currBd].BD_CTRL.LAST_BD = 1;
uc_desc->bd[desc->currBd].BD_CTRL.LIFM = 1; uc_desc->bd[desc->currBd].BD_CTRL.LIFM = 1;