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mbedtls: Avoid malloc in esp_sha() function

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This commit is contained in:
Angus Gratton 2020-11-06 14:50:22 +11:00 committed by bot
parent c842b7e5d9
commit b798158b4c
1 changed files with 32 additions and 28 deletions
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60
components/mbedtls/port/sha/esp_sha.c
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@ -33,65 +33,69 @@ static const char *TAG = "esp_sha";
void esp_sha(esp_sha_type sha_type, const unsigned char *input, size_t ilen, unsigned char *output)
{
union {
#if SOC_SHA_SUPPORT_SHA1
mbedtls_sha1_context sha1;
#endif
#if SOC_SHA_SUPPORT_SHA256
mbedtls_sha256_context sha256;
#endif
#if SOC_SHA_SUPPORT_SHA384 || SOC_SHA_SUPPORT_SHA512
mbedtls_sha512_context sha512;
#endif
} ctx;
int ret;
assert(input != NULL && output != NULL);
#if SOC_SHA_SUPPORT_SHA1
if (sha_type == SHA1) {
mbedtls_sha1_context *ctx1 = (mbedtls_sha1_context *)malloc(sizeof(mbedtls_sha1_context));
assert(ctx1 != NULL);
mbedtls_sha1_starts_ret(ctx1);
ret = mbedtls_sha1_update_ret(ctx1, input, ilen);
mbedtls_sha1_init(&ctx.sha1);
mbedtls_sha1_starts_ret(&ctx.sha1);
ret = mbedtls_sha1_update_ret(&ctx.sha1, input, ilen);
assert(ret == 0);
ret = mbedtls_sha1_finish_ret(ctx1, output);
ret = mbedtls_sha1_finish_ret(&ctx.sha1, output);
assert(ret == 0);
mbedtls_sha1_free(ctx1);
free(ctx1);
mbedtls_sha1_free(&ctx.sha1);
return;
}
#endif //SOC_SHA_SUPPORT_SHA1
#if SOC_SHA_SUPPORT_SHA256
if (sha_type == SHA2_256) {
mbedtls_sha256_context *ctx256 = (mbedtls_sha256_context *)malloc(sizeof(mbedtls_sha256_context));
assert(ctx256 != NULL);
mbedtls_sha256_starts_ret(ctx256, 0);
ret = mbedtls_sha256_update_ret(ctx256, input, ilen);
mbedtls_sha256_init(&ctx.sha256);
mbedtls_sha256_starts_ret(&ctx.sha256, 0);
ret = mbedtls_sha256_update_ret(&ctx.sha256, input, ilen);
assert(ret == 0);
ret = mbedtls_sha256_finish_ret(ctx256, output);
ret = mbedtls_sha256_finish_ret(&ctx.sha256, output);
assert(ret == 0);
mbedtls_sha256_free(ctx256);
free(ctx256);
mbedtls_sha256_free(&ctx.sha256);
return;
}
#endif //SOC_SHA_SUPPORT_SHA256
#if SOC_SHA_SUPPORT_SHA384
if (sha_type == SHA2_384) {
mbedtls_sha512_context *ctx384 = (mbedtls_sha512_context *)malloc(sizeof(mbedtls_sha512_context));
assert(ctx384 != NULL);
mbedtls_sha512_starts_ret(ctx384, 1);
ret = mbedtls_sha512_update_ret(ctx384, input, ilen);
mbedtls_sha512_init(&ctx.sha512);
mbedtls_sha512_starts_ret(&ctx.sha512, 1);
ret = mbedtls_sha512_update_ret(&ctx.sha512, input, ilen);
assert(ret == 0);
ret = mbedtls_sha512_finish_ret(ctx384, output);
ret = mbedtls_sha512_finish_ret(&ctx.sha512, output);
assert(ret == 0);
mbedtls_sha512_free(ctx384);
free(ctx384);
mbedtls_sha512_free(&ctx.sha512);
return;
}
#endif //SOC_SHA_SUPPORT_SHA384
#if SOC_SHA_SUPPORT_SHA512
if (sha_type == SHA2_512) {
mbedtls_sha512_context *ctx512 = (mbedtls_sha512_context *)malloc(sizeof(mbedtls_sha512_context));
assert(ctx512 != NULL);
mbedtls_sha512_starts_ret(ctx512, 0);
ret = mbedtls_sha512_update_ret(ctx512, input, ilen);
mbedtls_sha512_init(&ctx.sha512);
mbedtls_sha512_starts_ret(&ctx.sha512, 0);
ret = mbedtls_sha512_update_ret(&ctx.sha512, input, ilen);
assert(ret == 0);
ret = mbedtls_sha512_finish_ret(ctx512, output);
ret = mbedtls_sha512_finish_ret(&ctx.sha512, output);
assert(ret == 0);
mbedtls_sha512_free(ctx512);
free(ctx512);
mbedtls_sha512_free(&ctx.sha512);
return;
}
#endif //SOC_SHA_SUPPORT_SHA512