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ssl: refactoring CyaSSL_PemCertToDer to have a single return point.

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This commit is contained in:
Moisés Guimarães 2014-09-08 18:55:55 -03:00
parent 958ec5d578
commit b22e3abfff
1 changed files with 56 additions and 60 deletions
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116
src/ssl.c
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@ -3199,83 +3199,79 @@ int CyaSSL_CTX_der_load_verify_locations(CYASSL_CTX* ctx, const char* file,
int CyaSSL_PemCertToDer(const char* fileName, unsigned char* derBuf, int derSz)
{
#ifdef CYASSL_SMALL_STACK
EncryptedInfo* info;
byte staticBuffer[1]; /* force XMALLOC */
#else
EncryptedInfo info[1];
byte staticBuffer[FILE_BUFFER_SIZE];
#endif
byte* fileBuf = staticBuffer;
int dynamic = 0;
int ret;
int ecc = 0;
long sz = 0;
XFILE file = XFOPEN(fileName, "rb");
buffer converted;
int ret = 0;
int ecc = 0;
long sz = 0;
XFILE file = XFOPEN(fileName, "rb");
buffer converted;
CYASSL_ENTER("CyaSSL_PemCertToDer");
converted.buffer = 0;
if (file == XBADFILE)
return SSL_BAD_FILE;
XFSEEK(file, 0, XSEEK_END);
sz = XFTELL(file);
if (sz < 0) {
XFCLOSE(file);
return SSL_BAD_FILE;
}
XREWIND(file);
if (sz > (long)sizeof(staticBuffer)) {
fileBuf = (byte*) XMALLOC(sz, 0, DYNAMIC_TYPE_FILE);
if (fileBuf == NULL) {
XFCLOSE(file);
return SSL_BAD_FILE;
}
dynamic = 1;
}
if ( (ret = (int)XFREAD(fileBuf, sz, 1, file)) < 0)
ret = SSL_BAD_FILE;
else {
#ifdef CYASSL_SMALL_STACK
EncryptedInfo* info;
#else
EncryptedInfo info[1];
#endif
#ifdef CYASSL_SMALL_STACK
info = (EncryptedInfo*)XMALLOC(sizeof(EncryptedInfo), NULL,
XFSEEK(file, 0, XSEEK_END);
sz = XFTELL(file);
XREWIND(file);
if (sz < 0) {
ret = SSL_BAD_FILE;
}
else if (sz > (long)sizeof(staticBuffer)) {
fileBuf = (byte*)XMALLOC(sz, 0, DYNAMIC_TYPE_FILE);
if (fileBuf == NULL)
ret = MEMORY_E;
else
dynamic = 1;
}
converted.buffer = 0;
if (ret == 0) {
if ( (ret = (int)XFREAD(fileBuf, sz, 1, file)) < 0)
ret = SSL_BAD_FILE;
else {
#ifdef CYASSL_SMALL_STACK
info = (EncryptedInfo*)XMALLOC(sizeof(EncryptedInfo), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (info == NULL)
ret = MEMORY_E;
else
#endif
{
ret = PemToDer(fileBuf, sz, CA_TYPE, &converted, 0, info, &ecc);
if (info == NULL)
ret = MEMORY_E;
else
#endif
{
ret = PemToDer(fileBuf, sz, CA_TYPE, &converted, 0, info,
&ecc);
#ifdef CYASSL_SMALL_STACK
XFREE(info, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
}
}
#ifdef CYASSL_SMALL_STACK
XFREE(info, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
if (ret == 0) {
if (converted.length < (word32)derSz) {
XMEMCPY(derBuf, converted.buffer, converted.length);
ret = converted.length;
}
else
ret = BUFFER_E;
}
XFREE(converted.buffer, 0, DYNAMIC_TYPE_CA);
}
XFCLOSE(file);
if (dynamic)
XFREE(fileBuf, 0, DYNAMIC_TYPE_FILE);
}
if (ret == 0) {
if (converted.length < (word32)derSz) {
XMEMCPY(derBuf, converted.buffer, converted.length);
ret = converted.length;
}
else
ret = BUFFER_E;
}
XFREE(converted.buffer, 0, DYNAMIC_TYPE_CA);
if (dynamic)
XFREE(fileBuf, 0, DYNAMIC_TYPE_FILE);
XFCLOSE(file);
return ret;
}