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Move mbedtls_ct_base64_(enc|dec)_char into base64.c

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman
2023-05-09 09:49:01 +01:00
parent 36ad151b20
commit 0ee9683987
4 changed files with 74 additions and 65 deletions
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41
library/constant_time_internal.h
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@@ -185,35 +185,6 @@ void mbedtls_ct_mpi_uint_cond_assign(size_t n,
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_BASE64_C)
/** Given a value in the range 0..63, return the corresponding Base64 digit.
*
* The implementation assumes that letters are consecutive (e.g. ASCII
* but not EBCDIC).
*
* \param value A value in the range 0..63.
*
* \return A base64 digit converted from \p value.
*/
unsigned char mbedtls_ct_base64_enc_char(unsigned char value);
/** Given a Base64 digit, return its value.
*
* If c is not a Base64 digit ('A'..'Z', 'a'..'z', '0'..'9', '+' or '/'),
* return -1.
*
* The implementation assumes that letters are consecutive (e.g. ASCII
* but not EBCDIC).
*
* \param c A base64 digit.
*
* \return The value of the base64 digit \p c.
*/
signed char mbedtls_ct_base64_dec_value(unsigned char c);
#endif /* MBEDTLS_BASE64_C */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_MAC)
/** Conditional memcpy without branches.
@@ -360,4 +331,16 @@ int mbedtls_ct_rsaes_pkcs1_v15_unpadding(unsigned char *input,
#endif /* MBEDTLS_PKCS1_V15 && MBEDTLS_RSA_C && ! MBEDTLS_RSA_ALT */
#if defined(MBEDTLS_BASE64_C)
/* Return 0xff if low <= c <= high, 0 otherwise.
*
* Constant flow with respect to c.
*/
unsigned char mbedtls_ct_uchar_mask_of_range(unsigned char low,
unsigned char high,
unsigned char c);
#endif /* MBEDTLS_BASE64_C */
#endif /* MBEDTLS_CONSTANT_TIME_INTERNAL_H */