mirror of
https://github.com/wolfSSL/wolfssl.git
synced 2026-08-09 06:42:13 +02:00
Daniele Lacamera
afe37aabd1
Close API-reachable and file-static gaps in the smaller modules (+52 union conditions): kdf 75->91, coding 48->64, wolfentropy 9->13, curve448 54->58 (100%), chacha20_poly1305 43->46 (100%), hash 6->7 (100%), wc_encrypt 16->19, pwdbased 14->17, signature 30->32. Additive cases in the existing tests (one new test_wc_HashTypeConvert), plus wolfentropy/random white-box drivers. Remaining are justified residuals (WOLFSSL_LOCAL wc_CryptKey, dead defensive branches, alloc/crypto-failure err-chains, platform seed sources).
471 lines
19 KiB
C
471 lines
19 KiB
C
/* test_coding.c
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*
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* Copyright (C) 2006-2026 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include <tests/unit.h>
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#include <wolfssl/wolfcrypt/coding.h>
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#include <tests/api/api.h>
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#include <tests/api/test_coding.h>
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/*
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* MC/DC DecisionCoverage for wolfcrypt/src/coding.c (Base64 / Base16).
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*
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* Base64_SkipNewline() is WOLFSSL_LOCAL (hidden visibility): it is NOT called
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* directly here (that would break the shared shared-lib CI), it is exercised
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* only indirectly via Base64_Decode() on inputs containing embedded
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* whitespace / CR / LF, in test_wc_Base64_DecodeWhitespaceCoverage below.
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*/
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/* Exercises the argument-check OR, the padding logic, the bad-character and
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* short-output-buffer branches of Base64_Decode() (constant-time path) and
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* Base64_Decode_nonCT() (table path). */
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int test_wc_Base64_DecodeDecisionCoverage(void)
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{
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EXPECT_DECLS;
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#if !defined(NO_CODING) && defined(WOLFSSL_BASE64_DECODE)
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/* "TWFu" -> "Man" */
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const byte good[] = { 'T', 'W', 'F', 'u' };
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byte out[8];
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word32 outLen;
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/* --- argument-check decision: (in==NULL && inLen>0) || out==NULL ||
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* outLen==NULL --- independence pair for each operand */
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/* in==NULL, inLen>0 -> true (BAD_FUNC_ARG) */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(NULL, 4, out, &outLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* in!=NULL, inLen>0 -> the (in==NULL && inLen>0) sub-term is false */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(good, (word32)sizeof(good), out, &outLen), 0);
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/* in==NULL, inLen==0 -> (in==NULL && inLen>0) false; other operands false */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(NULL, 0, out, &outLen), 0);
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/* out==NULL alone -> true */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(good, (word32)sizeof(good), NULL, &outLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* outLen==NULL alone -> true */
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ExpectIntEQ(Base64_Decode(good, (word32)sizeof(good), out, NULL),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* --- valid decode, verify result --- */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(good, (word32)sizeof(good), out, &outLen), 0);
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ExpectIntEQ(outLen, 3);
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ExpectIntEQ(XMEMCMP(out, "Man", 3), 0);
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/* --- padding decisions --- */
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/* pad3 && pad4 : "TQ==" -> "M" (1 byte) */
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{
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const byte p2[] = { 'T', 'Q', '=', '=' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(p2, (word32)sizeof(p2), out, &outLen), 0);
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ExpectIntEQ(outLen, 1);
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ExpectIntEQ(out[0], 'M');
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}
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/* !pad3 && pad4 : "TWE=" -> "Ma" (2 bytes) */
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{
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const byte p1[] = { 'T', 'W', 'E', '=' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(p1, (word32)sizeof(p1), out, &outLen), 0);
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ExpectIntEQ(outLen, 2);
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ExpectIntEQ(XMEMCMP(out, "Ma", 2), 0);
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}
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/* pad3 && !pad4 : illegal -> ASN_INPUT_E */
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{
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const byte bad[] = { 'T', 'W', '=', 'u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(bad, (word32)sizeof(bad), out, &outLen),
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WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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/* --- bad character (not in alphabet) -> ASN_INPUT_E --- */
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{
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const byte bad[] = { 'T', '@', 'F', 'u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(bad, (word32)sizeof(bad), out, &outLen),
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WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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/* --- output buffer too small -> BUFFER_E --- */
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outLen = 1;
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ExpectIntEQ(Base64_Decode(good, (word32)sizeof(good), out, &outLen),
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WC_NO_ERR_TRACE(BUFFER_E));
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/* --- trailing non-whitespace after a full quantum -> ASN_INPUT_E --- */
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{
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const byte tr[] = { 'T', 'W', 'F', 'u', '!' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(tr, (word32)sizeof(tr), out, &outLen),
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WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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/* --- table (non constant-time) decode path --- */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(good, (word32)sizeof(good), out, &outLen),
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0);
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ExpectIntEQ(outLen, 3);
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ExpectIntEQ(XMEMCMP(out, "Man", 3), 0);
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/* --- Base64_Decode_nonCT argument-check decision (own MC/DC, table path
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* is a distinct function from the constant-time one above):
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* (in==NULL && inLen>0) || out==NULL || outLen==NULL --- */
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/* in==NULL, inLen>0 -> true (BAD_FUNC_ARG) */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(NULL, 4, out, &outLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* in==NULL, inLen==0 -> (in==NULL && inLen>0) false; other operands
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* false too -> overall false, succeeds with empty output */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(NULL, 0, out, &outLen), 0);
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ExpectIntEQ(outLen, 0);
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/* out==NULL alone -> true */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(good, (word32)sizeof(good), NULL,
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&outLen), WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* outLen==NULL alone -> true */
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ExpectIntEQ(Base64_Decode_nonCT(good, (word32)sizeof(good), out, NULL),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* --- Base64_Decode_nonCT bad-character OR (e1==BAD||e2==BAD||e3==BAD||
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* e4==BAD): each position isolated so its independence pair is shown
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* against the all-good decode above. ':' (0x3A) is in the table's
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* range but maps to BAD, and unlike '=' it can't be mistaken for
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* padding, so it isolates e2/e3/e4 without tripping the pad3/pad4
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* logic. */
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{
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const byte badE2[] = { 'T', ':', 'F', 'u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(badE2, (word32)sizeof(badE2), out,
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&outLen), WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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{
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const byte badE3[] = { 'T', 'W', ':', 'u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(badE3, (word32)sizeof(badE3), out,
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&outLen), WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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{
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const byte badE4[] = { 'T', 'W', 'F', ':' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode_nonCT(badE4, (word32)sizeof(badE4), out,
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&outLen), WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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#endif
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return EXPECT_RESULT();
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}
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/* Drives Base64_SkipNewline() (indirectly) through Base64_Decode(): embedded
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* spaces, LF, CR LF, and the "not enough buffer" / bad-EOL branches. */
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int test_wc_Base64_DecodeWhitespaceCoverage(void)
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{
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EXPECT_DECLS;
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#if !defined(NO_CODING) && defined(WOLFSSL_BASE64_DECODE)
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byte out[16];
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word32 outLen;
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/* LF between quanta: "TWFu\nTWFu" -> "ManMan" */
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{
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const byte in[] = { 'T','W','F','u','\n','T','W','F','u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 6);
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ExpectIntEQ(XMEMCMP(out, "ManMan", 6), 0);
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}
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/* CR LF sequence between quanta */
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{
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const byte in[] = { 'T','W','F','u','\r','\n','T','W','F','u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 6);
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ExpectIntEQ(XMEMCMP(out, "ManMan", 6), 0);
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}
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/* embedded spaces (skipped as whitespace) */
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{
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const byte in[] = { 'T','W','F','u',' ',' ','T','W','F','u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 6);
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}
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/* CR not followed by LF -> bad end of line -> ASN_INPUT_E */
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{
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const byte in[] = { 'T','W','F','u','\r','x','T','u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen),
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WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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/* trailing whitespace after final quantum is tolerated */
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{
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const byte in[] = { 'T','W','F','u','\n' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 3);
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}
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/* LF followed by a space, followed by more data: exercises the
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* "while (len && curChar == ' ')" trailing-space-skip loop in
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* Base64_SkipNewline() with BOTH independence pairs in one call --
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* the loop first sees (len>0, curChar==' ') -> true (enters, consumes
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* the space) and then, once curChar becomes the next real character
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* 'T', sees (len>0, curChar==' ') -> false (exits without a further
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* iteration). */
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{
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const byte in[] = { 'T','W','F','u','\n',' ','T','W','F','u' };
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Decode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 6);
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ExpectIntEQ(XMEMCMP(out, "ManMan", 6), 0);
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}
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#endif
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return EXPECT_RESULT();
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}
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/* Base64_Encode / Base64_EncodeEsc / Base64_Encode_NoNl:
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* arg checks, length-only (out==NULL) path, buffer-too-small, escape logic. */
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int test_wc_Base64_EncodeDecisionCoverage(void)
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{
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EXPECT_DECLS;
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#if !defined(NO_CODING) && defined(WOLFSSL_BASE64_ENCODE)
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const byte in[] = { 'M', 'a', 'n' };
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byte out[64];
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word32 outLen;
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/* in==NULL && inLen>0 -> BAD_FUNC_ARG */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Encode(NULL, 3, out, &outLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* outLen==NULL -> BAD_FUNC_ARG */
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ExpectIntEQ(Base64_Encode(in, (word32)sizeof(in), out, NULL),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* out==NULL -> length-only query returns LENGTH_ONLY_E and sets outLen */
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outLen = 0;
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ExpectIntEQ(Base64_Encode(in, (word32)sizeof(in), NULL, &outLen),
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WC_NO_ERR_TRACE(LENGTH_ONLY_E));
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ExpectIntGT(outLen, 0);
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/* output buffer too small -> BAD_FUNC_ARG */
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outLen = 2;
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ExpectIntEQ(Base64_Encode(in, (word32)sizeof(in), out, &outLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* valid encode with trailing newline (WC_STD_ENC) */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Encode(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntGT(outLen, 0);
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/* valid encode without newline (WC_NO_NL_ENC) -> "TWFu" */
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outLen = (word32)sizeof(out);
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ExpectIntEQ(Base64_Encode_NoNl(in, (word32)sizeof(in), out, &outLen), 0);
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ExpectIntEQ(outLen, 4);
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ExpectIntEQ(XMEMCMP(out, "TWFu", 4), 0);
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/* escaped-newline encode (WC_ESC_NL_ENC): a payload long enough to force a
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* line break drives the CEscape() '\n' -> "%0A" and '+' / '=' escapes. */
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{
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byte big[80];
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byte enc[512];
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word32 i;
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for (i = 0; i < (word32)sizeof(big); i++)
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big[i] = (byte)(0xF8 + (i & 0x7)); /* yields '+' and '/' indices */
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outLen = (word32)sizeof(enc);
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ExpectIntEQ(Base64_EncodeEsc(big, (word32)sizeof(big), enc, &outLen), 0);
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ExpectIntGT(outLen, 0);
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}
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/* --- DoBase64_Encode() "(in==NULL && inLen>0)" independence: hold
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* in==NULL fixed, vary inLen. With inLen==0 the sub-term is false, so
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* (unlike the inLen>0 case above) argument validation does not reject
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* it; the call proceeds all the way to the final "i != outSz" sanity
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* check (see below), which non-obviously trips for an empty, WC_STD_ENC
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* encode because a lone trailing '\n' is still appended while the
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* pre-computed outSz for zero input is 0. */
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{
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byte enc[8];
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outLen = (word32)sizeof(enc);
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ExpectIntEQ(Base64_Encode(NULL, 0, enc, &outLen),
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WC_NO_ERR_TRACE(ASN_INPUT_E));
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}
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/* Same empty-input edge case, but WC_ESC_NL_ENC: the trailing '\n' is
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* escaped to the 3-byte "%0A", which happens to match outSz's escaped
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* bookkeeping, so this succeeds -- independence pair for the
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* "escaped != 1" operand of the final sanity check (holding "i !=
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* outSz" and "ret == 0" at the same values as the case directly
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* above). */
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{
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byte enc[8];
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outLen = (word32)sizeof(enc);
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ExpectIntEQ(Base64_EncodeEsc(NULL, 0, enc, &outLen), 0);
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ExpectIntEQ(outLen, 3);
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ExpectIntEQ(XMEMCMP(enc, "%0A", 3), 0);
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}
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/* --- exact-multiple-of-line-length input (48 bytes == 16 groups of 3,
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* BASE64_LINE_SZ/4 == 16 groups per line): the newline-insertion check
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* "escaped != WC_NO_NL_ENC && (++n % (BASE64_LINE_SZ/4)) == 0 && inLen"
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* hits the line boundary exactly when there is no input left, so its
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* "inLen" operand is false here (no embedded newline is inserted --
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* only the single unconditional trailing one). Pairs with the
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* mid-buffer newlines already produced by the "big" EncodeEsc case
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* above, where inLen is still nonzero at the line boundary. */
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{
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byte in48[48];
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byte enc[128];
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word32 i;
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int nlCount = 0;
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for (i = 0; i < (word32)sizeof(in48); i++)
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in48[i] = (byte)(i + 1);
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outLen = (word32)sizeof(enc);
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ExpectIntEQ(Base64_Encode(in48, (word32)sizeof(in48), enc, &outLen),
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0);
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for (i = 0; i < outLen; i++) {
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if (enc[i] == '\n')
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nlCount++;
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}
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/* exactly one (trailing) newline -- none inserted mid-stream */
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ExpectIntEQ(nlCount, 1);
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ExpectIntEQ(enc[outLen - 1], '\n');
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}
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/* --- force a BUFFER_E from CEscape() inside the *main* while loop
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* (not the tail), so DoBase64_Encode()'s "if (inLen && ret == 0)"
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* decision is reached with inLen still nonzero (the failing group's
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* 3 bytes were never subtracted from inLen) and ret != 0: the
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* independence pair for "ret == 0", holding "inLen" true, against the
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* "big" EncodeEsc case above (inLen true, ret == 0 true). Four
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* repeats of a 3-byte pattern chosen so every group encodes to
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* '+','+','A','+' (three escapes needing 3 bytes each): outLen is
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* sized to the *unescaped* precomputed size (which under-counts the
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* '+' escape overhead), so the second group's 4th escape overflows
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* mid-group. */
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{
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const byte plusIn[12] = { 0xFB, 0xE0, 0x3E, 0xFB, 0xE0, 0x3E,
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0xFB, 0xE0, 0x3E, 0xFB, 0xE0, 0x3E };
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byte enc[32];
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outLen = 19; /* == precomputed outSz for 12 bytes, WC_ESC_NL_ENC */
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ExpectIntEQ(Base64_EncodeEsc(plusIn, (word32)sizeof(plusIn), enc,
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&outLen), WC_NO_ERR_TRACE(BUFFER_E));
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}
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#endif
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return EXPECT_RESULT();
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}
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/* Base16_Encode / Base16_Decode: arg checks, single-byte decode, odd-length,
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* bad-character, short-buffer, and a round-trip. */
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int test_wc_Base16DecisionCoverage(void)
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{
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EXPECT_DECLS;
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#if !defined(NO_CODING) && defined(WOLFSSL_BASE16)
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const byte raw[] = { 0x0A, 0xB3, 0xFF };
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byte hex[8];
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byte back[8];
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word32 hexLen;
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word32 backLen;
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/* --- Base16_Encode arg checks --- */
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hexLen = (word32)sizeof(hex);
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ExpectIntEQ(Base16_Encode(NULL, 3, hex, &hexLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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hexLen = (word32)sizeof(hex);
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ExpectIntEQ(Base16_Encode(raw, 3, NULL, &hexLen),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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ExpectIntEQ(Base16_Encode(raw, 3, hex, NULL),
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WC_NO_ERR_TRACE(BAD_FUNC_ARG));
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/* output too small (*outLen < 2*inLen) -> BAD_FUNC_ARG */
|
|
hexLen = 2;
|
|
ExpectIntEQ(Base16_Encode(raw, 3, hex, &hexLen),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
|
|
/* --- valid encode (buffer has room, so a NUL is appended and counted) --- */
|
|
hexLen = (word32)sizeof(hex);
|
|
ExpectIntEQ(Base16_Encode(raw, (word32)sizeof(raw), hex, &hexLen), 0);
|
|
ExpectIntEQ(hexLen, 7); /* 6 hex chars + appended NUL terminator */
|
|
ExpectIntEQ(XMEMCMP(hex, "0AB3FF", 6), 0);
|
|
|
|
/* --- Base16_Decode arg checks --- */
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(NULL, 6, back, &backLen),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(hex, 6, NULL, &backLen),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
ExpectIntEQ(Base16_Decode(hex, 6, back, NULL),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
|
|
/* odd length (>1) -> BAD_FUNC_ARG */
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(hex, 3, back, &backLen),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
|
|
/* --- "inLen == 1 && *outLen && in" independence for *outLen: hold
|
|
* inLen==1 (true) fixed, force *outLen == 0 (false); the single-byte
|
|
* fast path above already showed inLen==1 && *outLen(true) && in
|
|
* -> true (decoded 'A' directly), so this closes the *outLen operand.
|
|
* Falls through to the "inLen % 2" check, where inLen==1 is odd. */
|
|
{
|
|
const byte one[] = { 'A' };
|
|
backLen = 0;
|
|
ExpectIntEQ(Base16_Decode(one, 1, back, &backLen),
|
|
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
|
|
}
|
|
|
|
/* output too small -> BUFFER_E */
|
|
backLen = 1;
|
|
ExpectIntEQ(Base16_Decode(hex, 6, back, &backLen),
|
|
WC_NO_ERR_TRACE(BUFFER_E));
|
|
|
|
/* single-byte decode path: "A" -> 0x0A */
|
|
{
|
|
const byte one[] = { 'A' };
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(one, 1, back, &backLen), 0);
|
|
ExpectIntEQ(backLen, 1);
|
|
ExpectIntEQ(back[0], 0x0A);
|
|
}
|
|
|
|
/* bad character -> ASN_INPUT_E ('G' is out of the hex alphabet) */
|
|
{
|
|
const byte bad[] = { 'G', 'G' };
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(bad, 2, back, &backLen),
|
|
WC_NO_ERR_TRACE(ASN_INPUT_E));
|
|
}
|
|
|
|
/* --- "b == BAD || b2 == BAD" independence for b2: the case above has
|
|
* BOTH nibbles bad (b == BAD already true, masking b2); pair a good
|
|
* first nibble with a bad second nibble so only b2's operand drives
|
|
* the (still true) decision, against the all-good round-trip decode
|
|
* below where both are false. */
|
|
{
|
|
const byte bad[] = { '0', 'G' };
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(bad, 2, back, &backLen),
|
|
WC_NO_ERR_TRACE(ASN_INPUT_E));
|
|
}
|
|
|
|
/* --- round-trip decode of the earlier encode --- */
|
|
backLen = (word32)sizeof(back);
|
|
ExpectIntEQ(Base16_Decode(hex, 6, back, &backLen), 0);
|
|
ExpectIntEQ(backLen, 3);
|
|
ExpectIntEQ(XMEMCMP(back, raw, 3), 0);
|
|
#endif
|
|
return EXPECT_RESULT();
|
|
}
|