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Entropy collector and CTR-DRBG now also work on SHA-256 if SHA-512 not available

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This commit is contained in:
Paul Bakker 2013-08-27 15:06:26 +02:00
parent 0a20171d52
commit fb08fd2e23
6 changed files with 65 additions and 5 deletions
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13
include/polarssl/config.h
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@ -1326,7 +1326,7 @@
// CTR_DRBG options
//
#define CTR_DRBG_ENTROPY_LEN 48 /**< Amount of entropy used per seed by default */
#define CTR_DRBG_ENTROPY_LEN 48 /**< Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) */
#define CTR_DRBG_RESEED_INTERVAL 10000 /**< Interval before reseed is performed by default */
#define CTR_DRBG_MAX_INPUT 256 /**< Maximum number of additional input bytes */
#define CTR_DRBG_MAX_REQUEST 1024 /**< Maximum number of requested bytes per call */
@ -1382,9 +1382,18 @@
#error "POLARSSL_ECP_C defined, but not all prerequisites"
#endif
#if defined(POLARSSL_ENTROPY_C) && !defined(POLARSSL_SHA512_C)
#if defined(POLARSSL_ENTROPY_C) && (!defined(POLARSSL_SHA512_C) && \
!defined(POLARSSL_SHA256_C))
#error "POLARSSL_ENTROPY_C defined, but not all prerequisites"
#endif
#if defined(POLARSSL_ENTROPY_C) && defined(POLARSSL_SHA512_C) && \
defined(POLARSSL_CONFIG_OPTIONS) && (CTR_DRBG_ENTROPY_LEN > 64)
#error "CTR_DRBG_ENTROPY_LEN value too high"
#endif
#if defined(POLARSSL_ENTROPY_C) && !defined(POLARSSL_SHA512_C) && \
defined(POLARSSL_CONFIG_OPTIONS) && (CTR_DRBG_ENTROPY_LEN > 32)
#error "CTR_DRBG_ENTROPY_LEN value too high"
#endif
#if defined(POLARSSL_GCM_C) && !defined(POLARSSL_AES_C)
#error "POLARSSL_GCM_C defined, but not all prerequisites"