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Minor readability improvement

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Polish the beginning of mbedtls_rsa_rsaes_pkcs1_v15_decrypt a little,
to prepare for some behavior changes.
This commit is contained in:
Gilles Peskine 2018-10-02 22:43:06 +02:00
parent 53546ea099
commit 5908dd4455
1 changed files with 7 additions and 8 deletions
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13
library/rsa.c
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@ -1390,15 +1390,17 @@ int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
size_t output_max_len )
{
int ret;
size_t ilen, pad_count = 0, i;
unsigned char *p, bad, pad_done = 0;
size_t ilen = ctx->len;
size_t pad_count = 0;
size_t i;
unsigned bad = 0;
unsigned char pad_done = 0;
unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
unsigned char *p = buf;
if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
ilen = ctx->len;
if( ilen < 16 || ilen > sizeof( buf ) )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@ -1409,9 +1411,6 @@ int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
if( ret != 0 )
goto cleanup;
p = buf;
bad = 0;
/*
* Check and get padding len in "constant-time"
*/