Update cmac.h
Minor documentation improvements:
*Standardized file brief description.
*Separated return statements.
*Please verify RFC in file description.
diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index 628c9da..b9c6f22 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -1,8 +1,10 @@
/**
* \file cmac.h
*
- * \brief The Cipher-based Message Authentication Code (CMAC) Mode for
- * Authentication.
+ * \brief This file contains CMAC definitions and functions.
+ *
+ * The Cipher-based Message Authentication Code (CMAC) Mode for
+ * Authentication is defined in <em>RFC-4493: The AES-CMAC Algorithm</em>.
*/
/*
* Copyright (C) 2015-2018, Arm Limited (or its affiliates), All Rights Reserved
@@ -38,9 +40,9 @@
#define MBEDTLS_DES3_BLOCK_SIZE 8
#if defined(MBEDTLS_AES_C)
-#define MBEDTLS_CIPHER_BLKSIZE_MAX 16 /* The longest block used by CMAC is that of AES. */
+#define MBEDTLS_CIPHER_BLKSIZE_MAX 16 /**< The longest block used by CMAC is that of AES. */
#else
-#define MBEDTLS_CIPHER_BLKSIZE_MAX 8 /* The longest block used by CMAC is that of 3DES. */
+#define MBEDTLS_CIPHER_BLKSIZE_MAX 8 /**< The longest block used by CMAC is that of 3DES. */
#endif
#if !defined(MBEDTLS_CMAC_ALT)
@@ -67,16 +69,15 @@
* Must be called with an initialized cipher context.
*
* \param ctx The cipher context used for the CMAC operation, initialized
- * as one of the following types:<ul>
- * <li>MBEDTLS_CIPHER_AES_128_ECB</li>
- * <li>MBEDTLS_CIPHER_AES_192_ECB</li>
- * <li>MBEDTLS_CIPHER_AES_256_ECB</li>
- * <li>MBEDTLS_CIPHER_DES_EDE3_ECB</li></ul>
+ * as one of the following types: MBEDTLS_CIPHER_AES_128_ECB,
+ * MBEDTLS_CIPHER_AES_192_ECB, MBEDTLS_CIPHER_AES_256_ECB,
+ * or MBEDTLS_CIPHER_DES_EDE3_ECB.
* \param key The CMAC key.
* \param keybits The length of the CMAC key in bits.
* Must be supported by the cipher.
*
- * \return \c 0 on success, or a cipher-specific error code.
+ * \returns \c 0 on success.
+ * \returns A cipher-specific error code on failure.
*/
int mbedtls_cipher_cmac_starts( mbedtls_cipher_context_t *ctx,
const unsigned char *key, size_t keybits );
@@ -93,8 +94,9 @@
* \param input The buffer holding the input data.
* \param ilen The length of the input data.
*
- * \returns \c 0 on success, or #MBEDTLS_ERR_MD_BAD_INPUT_DATA
- * if parameter verification fails.
+ * \returns \c 0 on success.
+ * \returns #MBEDTLS_ERR_MD_BAD_INPUT_DATA
+ * if parameter verification fails.
*/
int mbedtls_cipher_cmac_update( mbedtls_cipher_context_t *ctx,
const unsigned char *input, size_t ilen );
@@ -110,7 +112,8 @@
* \param ctx The cipher context used for the CMAC operation.
* \param output The output buffer for the CMAC checksum result.
*
- * \returns \c 0 on success, or #MBEDTLS_ERR_MD_BAD_INPUT_DATA
+ * \returns \c 0 on success.
+ * \returns #MBEDTLS_ERR_MD_BAD_INPUT_DATA
* if parameter verification fails.
*/
int mbedtls_cipher_cmac_finish( mbedtls_cipher_context_t *ctx,
@@ -126,7 +129,8 @@
*
* \param ctx The cipher context used for the CMAC operation.
*
- * \returns \c 0 on success, or #MBEDTLS_ERR_MD_BAD_INPUT_DATA
+ * \returns \c 0 on success.
+ * \returns #MBEDTLS_ERR_MD_BAD_INPUT_DATA
* if parameter verification fails.
*/
int mbedtls_cipher_cmac_reset( mbedtls_cipher_context_t *ctx );
@@ -149,7 +153,8 @@
* \param ilen The length of the input data.
* \param output The buffer for the generic CMAC result.
*
- * \returns \c 0 on success, or #MBEDTLS_ERR_MD_BAD_INPUT_DATA
+ * \returns \c 0 on success.
+ * \returns #MBEDTLS_ERR_MD_BAD_INPUT_DATA
* if parameter verification fails.
*/
int mbedtls_cipher_cmac( const mbedtls_cipher_info_t *cipher_info,
@@ -196,7 +201,8 @@
/**
* \brief The CMAC checkup routine.
*
- * \return \c 0 on success, or \c 1 on failure.
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
*/
int mbedtls_cmac_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST && ( MBEDTLS_AES_C || MBEDTLS_DES_C ) */