1 /* 2 * QEMU Crypto hmac algorithms 3 * 4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or 7 * (at your option) any later version. See the COPYING file in the 8 * top-level directory. 9 * 10 */ 11 12 #include "qemu/osdep.h" 13 #include "qapi/error.h" 14 #include "crypto/hmac.h" 15 16 static const char hex[] = "0123456789abcdef"; 17 18 int qcrypto_hmac_bytes(QCryptoHmac *hmac, 19 const char *buf, 20 size_t len, 21 uint8_t **result, 22 size_t *resultlen, 23 Error **errp) 24 { 25 struct iovec iov = { 26 .iov_base = (char *)buf, 27 .iov_len = len 28 }; 29 30 return qcrypto_hmac_bytesv(hmac, &iov, 1, result, resultlen, errp); 31 } 32 33 int qcrypto_hmac_digestv(QCryptoHmac *hmac, 34 const struct iovec *iov, 35 size_t niov, 36 char **digest, 37 Error **errp) 38 { 39 uint8_t *result = NULL; 40 size_t resultlen = 0; 41 size_t i; 42 43 if (qcrypto_hmac_bytesv(hmac, iov, niov, &result, &resultlen, errp) < 0) { 44 return -1; 45 } 46 47 *digest = g_new0(char, (resultlen * 2) + 1); 48 49 for (i = 0 ; i < resultlen ; i++) { 50 (*digest)[(i * 2)] = hex[(result[i] >> 4) & 0xf]; 51 (*digest)[(i * 2) + 1] = hex[result[i] & 0xf]; 52 } 53 54 (*digest)[resultlen * 2] = '\0'; 55 56 g_free(result); 57 return 0; 58 } 59 60 int qcrypto_hmac_digest(QCryptoHmac *hmac, 61 const char *buf, 62 size_t len, 63 char **digest, 64 Error **errp) 65 { 66 struct iovec iov = { 67 .iov_base = (char *)buf, 68 .iov_len = len 69 }; 70 71 return qcrypto_hmac_digestv(hmac, &iov, 1, digest, errp); 72 } 73