int wc_MIME_parse_headers(char* in, int inLen, MimeHdr** headers)
{
    MimeHdr* nextHdr = NULL;
    MimeHdr* curHdr = NULL;
    MimeParam* nextParam = NULL;
    size_t start = 0;
    size_t end = 0;
    char* nameAttr = NULL;
    char* bodyVal = NULL;
    MimeTypes mimeType = MIME_HDR;
    MimeStatus mimeStatus = MIME_NAMEATTR;
    int ret = -1;
    size_t pos = 0;
    size_t lineLen = 0;
    char* curLine = NULL;
    char* ptr = NULL;

    if (in == NULL || inLen <= 0 || in[inLen] != '\0' || headers == NULL) {
        ret = BAD_FUNC_ARG;
        goto error;
    }
    nextHdr = (MimeHdr*)XMALLOC(sizeof(MimeHdr), NULL, DYNAMIC_TYPE_PKCS7);
    nextParam = (MimeParam*)XMALLOC(sizeof(MimeParam), NULL,
                                    DYNAMIC_TYPE_PKCS7);
    if (nextHdr == NULL || nextParam == NULL) {
        ret = MEMORY_E;
        goto error;
    }
    XMEMSET(nextHdr, 0, (word32)sizeof(MimeHdr));
    XMEMSET(nextParam, 0, (word32)sizeof(MimeParam));

    curLine = XSTRTOK(in, "\r\n", &ptr);
    if (curLine == NULL) {
        ret = ASN_PARSE_E;
        goto error;
    }

    while (curLine != NULL) {
        /* Leftover from previous line, add params to previous header. */
        if (curLine[0] == ' ' && curHdr) {
            mimeType = MIME_PARAM;
        }
        else {
            mimeType = MIME_HDR;
        }
        start = 0;
        lineLen = XSTRLEN(curLine);
        if (lineLen == 0) {
            ret = BAD_FUNC_ARG;
            goto error;
        }

        for (pos = 0; pos < lineLen; pos++) {
            char cur = curLine[pos];

            if (mimeStatus == MIME_NAMEATTR && ((cur == ':' &&
                mimeType == MIME_HDR) || (cur == '=' &&
                mimeType == MIME_PARAM)) && pos >= 1) {
                mimeStatus = MIME_BODYVAL;
                end = pos-1;
                ret = wc_MIME_header_strip(curLine, &nameAttr, start, end);
                if (ret) {
                    goto error;
                }
                start = pos+1;
            }
            else if (mimeStatus == MIME_BODYVAL && cur == ';' && pos >= 1) {
                end = pos-1;
                ret = wc_MIME_header_strip(curLine, &bodyVal, start, end);
                if (ret) {
                    goto error;
                }
                if (mimeType == MIME_HDR) {
                    nextHdr->name = nameAttr;
                    nameAttr = NULL;
                    nextHdr->body = bodyVal;
                    bodyVal = NULL;
                    nextHdr->next = curHdr;
                    curHdr = nextHdr;
                    nextHdr = (MimeHdr*)XMALLOC(sizeof(MimeHdr), NULL,
                                                DYNAMIC_TYPE_PKCS7);
                    if (nextHdr == NULL) {
                        ret = MEMORY_E;
                        goto error;
                    }
                    XMEMSET(nextHdr, 0, (word32)sizeof(MimeHdr));
                }
                else {
                    nextParam->attribute = nameAttr;
                    nameAttr = NULL;
                    nextParam->value = bodyVal;
                    bodyVal = NULL;
                    nextParam->next = curHdr->params;
                    curHdr->params = nextParam;
                    nextParam = (MimeParam*)XMALLOC(sizeof(MimeParam), NULL,
                                                    DYNAMIC_TYPE_PKCS7);
                    if (nextParam == NULL) {
                        ret = MEMORY_E;
                        goto error;
                    }
                    XMEMSET(nextParam, 0, (word32)sizeof(MimeParam));
                }
                mimeType = MIME_PARAM;
                mimeStatus = MIME_NAMEATTR;
                start = pos+1;
            }
        }

        end = lineLen-1;
        /* Omit newline characters. */
        while ((curLine[end] == '\r' || curLine[end] == '\n') && end > 0) {
            end--;
        }
        if (end >= start && mimeStatus == MIME_BODYVAL) {
            ret = wc_MIME_header_strip(curLine, &bodyVal, start, end);
            if (ret) {
                goto error;
            }
            if (mimeType == MIME_HDR) {
                nextHdr->name = nameAttr;
                nameAttr = NULL;
                nextHdr->body = bodyVal;
                bodyVal = NULL;
                nextHdr->next = curHdr;
                curHdr = nextHdr;
                nextHdr = (MimeHdr*)XMALLOC(sizeof(MimeHdr), NULL,
                                            DYNAMIC_TYPE_PKCS7);
                if (nextHdr == NULL) {
                    ret = MEMORY_E;
                    goto error;
                }
                XMEMSET(nextHdr, 0, (word32)sizeof(MimeHdr));
            } else {
                nextParam->attribute = nameAttr;
                nameAttr = NULL;
                nextParam->value = bodyVal;
                bodyVal = NULL;
                nextParam->next = curHdr->params;
                curHdr->params = nextParam;
                nextParam = (MimeParam*)XMALLOC(sizeof(MimeParam), NULL,
                                                DYNAMIC_TYPE_PKCS7);
                if (nextParam == NULL) {
                    ret = MEMORY_E;
                    goto error;
                }
                XMEMSET(nextParam, 0, (word32)sizeof(MimeParam));
            }
        }

        curLine = XSTRTOK(NULL, "\r\n", &ptr);
        mimeStatus = MIME_NAMEATTR;
    }

    *headers = curHdr;
    ret = 0; /* success if at this point */

error:
    if (ret != 0)
        wc_MIME_free_hdrs(curHdr);
    wc_MIME_free_hdrs(nextHdr);
    if (nameAttr != NULL)
        XFREE(nameAttr, NULL, DYNAMIC_TYPE_PKCS7);
    if (bodyVal != NULL)
        XFREE(bodyVal, NULL, DYNAMIC_TYPE_PKCS7);
    XFREE(nextParam, NULL, DYNAMIC_TYPE_PKCS7);

    return ret;
}