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Fix padding control: EVP_CipherUpdate

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This commit is contained in:
Takashi Kojo
2017-02-07 11:22:11 +09:00
committed by Jacob Barthelmeh
parent 150481699f
commit 734e728fba
2 changed files with 15 additions and 8 deletions
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2
src/ssl.c
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@@ -26714,7 +26714,7 @@ int wolfSSL_DH_generate_parameters_ex(WOLFSSL_DH* dh, int prime_len, int generat
void wolfSSL_ERR_load_crypto_strings(void)
{
WOLFSSL_ENTER("wolfSSL_ERR_load_crypto_strings");
WOLFSSL_ENTER("wolfSSL_ERR_load_crypto_strings");
WOLFSSL_STUB("wolfSSL_ERR_load_crypto_strings");
return;
}

21
wolfcrypt/src/evp.c
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@@ -309,7 +309,7 @@ WOLFSSL_API int wolfSSL_EVP_CipherUpdate(WOLFSSL_EVP_CIPHER_CTX *ctx,
*outl+= ctx->block_size;
out += ctx->block_size;
}
if ((ctx->bufUsed == ctx->block_size) || (ctx->flags & WOLFSSL_EVP_CIPH_NO_PADDING)){
if (ctx->bufUsed == ctx->block_size){
/* the buff is full, flash out */
PRINT_BUF(ctx->buf, ctx->block_size);
if (evpCipherBlock(ctx, out, ctx->buf, ctx->block_size) == 0)
@@ -328,16 +328,23 @@ WOLFSSL_API int wolfSSL_EVP_CipherUpdate(WOLFSSL_EVP_CIPHER_CTX *ctx,
blocks = inl / ctx->block_size;
if (blocks > 0) {
/* process blocks */
if (evpCipherBlock(ctx, out, in, blocks*ctx->block_size) == 0)
if (evpCipherBlock(ctx, out, in, blocks * ctx->block_size) == 0)
return 0;
PRINT_BUF(ctx->buf, ctx->block_size);
PRINT_BUF(out, ctx->block_size);
PRINT_BUF(in, ctx->block_size);
PRINT_BUF(out,ctx->block_size);
inl -= ctx->block_size * blocks;
in += ctx->block_size * blocks;
if(ctx->enc == 0){
ctx->lastUsed = 1;
XMEMCPY(ctx->lastBlock, &out[ctx->block_size * (blocks-1)], ctx->block_size);
*outl+= ctx->block_size * (blocks-1);
if ((ctx->flags & WOLFSSL_EVP_CIPH_NO_PADDING) ||
((inl % ctx->block_size) == 0)){
ctx->lastUsed = 0;
XMEMCPY(ctx->lastBlock, &out[ctx->block_size * blocks], ctx->block_size);
*outl+= ctx->block_size * blocks;
} else {
ctx->lastUsed = 1;
XMEMCPY(ctx->lastBlock, &out[ctx->block_size * (blocks-1)], ctx->block_size);
*outl+= ctx->block_size * (blocks-1);
}
} else {
*outl+= ctx->block_size * blocks;
}